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EPSON LQ-2170

1. 2 GATE ARRAY E05B13 t i lote Head Drive C1 EEPROM CN2 for Option I F CR Motor Driver TRANSISTOR CPU SLA7024M TMP96C041AF Figure 1 13 C165 MAIN Board Assembly 1 6 2 C165 PSB PSE Board Assembly These boards have two AC input voltage ratings 120 VAC C165 PSB and 230 VAC C165 PSE Both boards consist of a transformer switching FET regulator IC diode bridge etc The power supply board provides 5 VDC and 35 VDC for the main board and printer mechanism F1 Q1 PC1 IC52 Fuse Switching FET Photo Coupler _ OP amp D51 Diode DB1 T1 IC51 Diode Bridge Transformaer Switching Regulator TL494CN Figure 1 14 C165 PSB PSE Board Assembly 1 36 Rev A LQ 2170 Service Manual Product Description 1 6 3 C165 PNL Board Assembly This board function is the control panel for the LQ 2170 It consists of a power switch six buttons and 10 indicator LEDs This board is almost same as it for the LQ 2170 000 OO LED LED e LED SW SW Power SW de de Figure 1 15 Board Assembly C165 PNL 1 6 4 Printer Mechanism The printer mechanism consists of an 24 pin impact dot head paper feed PE motor
2. J Figure 2 14 Pull Tractor Feeding Using the Rear Entrance As shown above in Figure 2 14 when you use the pull tractor in this printer you must remove the paper eject cover which includes the paper tension roller from the printer mechanism 2 12 Rev A LQ 2170 Service Manual Operating Principles J N wt ks y Ls gt WA paaa a gt AE EU YY Uy Figure 2 15 Push Pull Tractor Feeding Using the Rear Entrance As shown above in Figure 2 15 when you use the pull tractor with this printer you must remove the paper eject cover which includes the paper tension roller from the printer mechanism 3 Bottom Entrance Figure 2 16 shows the paper path for tractor feeding using the bottom entrance The bottom entrance is used only for pull tractor feed When the bottom entrance is used the front PE sensor detects when paper is out Figure 2 16 Pull Tractor Feeding Using the Bottom Entrance Rev A 2 13 Operating Principles LQ 2170 Service Manual 4 Front Entrance Figures 2 17 through 2 20 show the paper paths for the front entrance The front entrance can be used with any of the following paper feed methods friction feed push tractor feed pull tractor feed or push pull tractor feed When the front entrance is used the front PE sensor detects when paper is out Figure 2 17 Friction Feeding Using the Front Entrance
3. 2 14 Rev A LQ 2170 Service Manual Operating Principles Figure 2 20 Push Pull Tractor Feeding Using the Front Entrance Rev A 2 15 Operating Principles LQ 2170 Service Manual 2 1 6 Ribbon Advance Mechanism The ribbon is held between the ribbon advance roller ribbon driven gear and the ribbon pressure roller When the carriage moves from left to right and vice versa on the CR guide shaft the timing belt turns the belt driven pulley Then the torque is transmitted to the ribbon driving gear through the gear trains The ribbon driving gear rotates counterclockwise no matter what direction the carriage moves because a planetary gear is used in the gear linkage Table 2 4 Ribbon Advance Gear Linkage Direction of Carriage Movement Gear Linkage Left to right Belt driven pulley gt Gear 1 gt Gear 2 gt indicated by the black arrow Ribbon driving gear Right to light Belt driven pulley gt Gear 1 gt Gear 3 gt indicated by the white arrow Gear 4 gt Ribbon driving gear The ribbon brake spring attached to the exit of the cartridge case prevents slack in the ribbon and keeps the ribbon tension at an appropriate level The ribbon mask prevents the ribbon from brushing against the paper Figure 2 21 Ribbon Advance Mechanism 2 16 Rev A LQ 2170 Service Manual Operating Principles 2 2 POWER SUPPLY OPERATION The pri
4. OS Data latch and data output Image EA Buffer III IRIS IRIS TIRAR AIRES Image data transfer RSS Printhead drive circuite Figure 2 31 Data Flow The following table lists the each function of the main components of the C165 MAIN board Table 2 7 Functions of the Main Board Location Function Receives data from the host computer and sends it to the input buffer in RAM under interrupt processing control Extends the input data held in the buffer to create image data Loads this image data to the image buffer in RAM Transfers the image data to the printhead drive circuit Controls the functions below e Controls output data from the internal block e Memory management e Address latch of the address data bus from the CPU e Clock control unit e Bit manipulation e Interface control e Expanded parallel port e Printhead control e Motor control Gate Array An electrically writable and erasable ROM used to hold such information as the TOF position and bidirectional adjustment value EEPROM The ROM contains the program that runs the CPU and holds the ROM character design also called the character generator RAM The RAM contains the CPU working area and the buffers CG The CG contain the bit map font of each character table SLA7024M Drive circuit for the CR motor UDN2917EB Drive circuit for the PF motor Rev A 2 23 Operating Principl
5. a 3 11 3 2 8 Removing the Case Open Sensor Assembly 005 3 12 3 2 9 Removing the CR Motor Assembly eee eee eae 3 12 3 2 10 Removing the Printer Mechanism e eee eee 3 13 3 2 10 1 Removing the PF Motor Assembly o o oo 3 14 3 2 10 2 Removing the PG Sensor Assembly 00 3 15 3 2 10 3 Removing the Right Frame Assembly 3 16 3 2 10 4 Disassembling the Right Frame Assembly 3 16 3 2 10 5 Removing the Left Frame Assembly 3 19 3 2 10 6 Removing the Ribbon Drive RD Assembly 3 20 3 2 10 7 Removing the CR Assembly o 3 21 3 2 10 8 Removing the Rear PE Sensor Assembly 3 23 3 2 10 9 Removing the Front PE Sensor Assembly 3 23 3 2 11 Removing the C165 MAIN Board Assembly 2 0 3 24 3 2 12 Removing the C165 PSB E Board Assembly 3 25 3 3 DISASSEMBLY AND ASSEMBLY OF CSF BIN 1 3 26 3 3 1 Disassembling the Right Side Block ooooccooocoooo 3 26 3 3 2 Disassembling the Paper Support Block Assembly 3 28 3 3 3 Removing the Paper Eject Cover Assembly oooocooococooo 3 30 3 4 DISASSEMBLY AND ASSEMBLY OF CSF BIN 2 3 31 3 4 1 Disassembly Right Side Block 00 00 cece eee 3 31 3 4 2 Disassembly Paper Support Block Assembly o o 3 32 List of Figures Figure
6. 18H 19H Bottom margin for front tractor 1 to 22 x 360 in units of 1 360 inch OOOOH 11 inches same as default 0F78H 11 1AH 1BH Bottom margin for rear tractor 1 to 22 x 360 in units of 1 360 inch 0000H 1 1inches same as default 0F78H 11 1CH Front selection 0 Roman 1 Draft 2 Sans serif 3 Courier 4 Prestige 5 Script 6 Others Default Setting Font 00H Roman RN y A 2 Pitch selection 0 10 cpi 1 12 cpi 2 15 cpi 3 17 cpi 4 20 cpi 5 Proportional 00H 10 cpi K Assignment of data for two or more bytes is sequential from lower byte to lower address and from higher byte to higher address Rev A LQ 2170 Service Manual Appendix Address Data Format Default Reserved Pitch direction 0 Bi d 1 Uni d setting I F mode selection 0 Auto I F Selection 1 Parallel I F 2 Type B I F Auto I F wait time 10 10 Sec 30 30 Sec 00 10 Sec setting Auto line feed b0 Auto line feed 0 Off Auto tear off b1 Auto tear off 0 Off Skip over Skip over perforation 0 Off perforation High speed draft 0 On High speed draft Input buffer 0 On Input buffer Reserved Reserved Reserved Software Software 0 ESC P 1 IBM2381 Plus 0 slashed 0 slashed 0 Off On Buzzer Buzzer 0 On Off Roll paper Roll paper 0 Off On Auto CR Auto CR IBM 0 Off On A G M A G M IBM 0 Off On R
7. Head Data 5 Head data 1 Head data 13 Head data 17 Head data 9 35 VDC line Head data 21 Head data 24 35 VDC line Head data 16 35 VDC line 35 VDC line Head data 20 Head data 8 Head data 12 Head temperature signal 5 VDC line Head data 4 OONOAaRWD Rev A A 7 Appendix LQ 2170 Service Manual Table A 8 Connector Pin Assignments CN9 Signal Name OONOAaRWND RELEASE1 GND RELEASE2 GND Function Head data 3 Head data 11 Head data 19 35 VDC line Head data 2 35 VDC line Head data 7 Head data 22 Head data 15 35 VDC line Head data 23 35 VDC line Head data 14 Head data 18 Head data 6 Head data 10 PF motor phase A PF motor phase B PF motor phase A PF motor phase B Function CR motor phase A CR motor phase A CR motor phase B CR motor phase B CR motor common Release sensor 1 signal Signal GND Release sensor 2 signal Signal GND Table A 12 Connector Pin Se CN13 ae Signal Name GND Signal GND A 8 Rev A OONOAaRWND 4 O LQ 2170 Service Manual Signal Name Signal Name COPEN PAUSEL 5V POUTL RESRVL PAUSSW TBIN2L TBIN1L PITC1L PITC2L FONT3L FONT2L FONT1L GND GND FONTSW PITCSW TBINSW PSC LDEJSW LFFFSW FG Appendix Table A 13 Connector Pin Assignments CN14 Function CSF motor phase A CSF motor phase B CSF motor phase A CSF motor phase B CSF motor hold signal
8. Printer select gt 1 9 pins 2 24 pins Figure 4 5 Machine Select Menu Note DEFSTD is the default U S setting 4 Highlight 24 pins by moving the cursor with T or J key and select it by pressing ENTER 5 After you select 24 pins you see the following menu Program J10A00E Setting DEFSTD 9pins VRO 0 VR1 0 VR2 0 Setting File DEFSTD ITALIC RUSSIAN Figure 4 6 Setting File Menu 1 2 3 NLSP 4 5 6 In this menu highlight the factory settings for the printer s destination by moving the cursor with the or key and select the destination factory settings by pressing ENTER 7 After you select the each factory settings the program displays the Main Menu shown below Program J10A00E Setting DEFSTD 9pins VRO 0 VR1 0 VR2 0 Main MENU gt 1 Bid Adjust 6 TPE LEVEL RESET 2 Check Pro FF 3 Check Pro A3 4 Check Pro A4 5 Check Pro Envelope Figure 4 7 Main Menu 8 Highlight Bi d Adjust by moving the cursor with the T or L key and select it by pressing ENTER 9 After you select Bi d Adjust the program displays the Bi D Adjustment Menu shown on the next page 10 Highlight the mode by moving the cursor with the T or 4 key and then print the current Bi d print alignment pattern for that mode by pressing SPACE 4 4 Rev A LQ 2170 Service Manual Adjustment lt Bi d adjustment gt gt Mode 0 0 Mode 1 0 Mode 2 0 Cancel Print Speed Value Wri
9. The rear PE sensor detects that paper is loaded in the rear paper path The release lever is set to continuous paper Table 1 35 Paper Handling Sequence 2 Occurrence Result Pause button pressed The printer goes off or on line LF FF button pressed The printer performs a line feed LF FF button held down continuously The printer performs a form feed after the line feed Load Eject button pressed Paper is ejected to the rear paper park position Load Eject button pressed and paper advanced to skip area Paper is advanced to the next TOF position Micro Adjust T button pressed The printer micro feeds paper forward Micro Adjust J button pressed The printer micro feeds paper backward Release lever set to Friction The beeper sounds Front paper end sensor detects that paper is loaded in the front paper path The beeper sounds Rev A 1 25 Product Description LQ 2170 Service Manual e Printer status The front PE sensor detects that paper is loaded in the front paper path The release lever is set to continuous paper Table 1 36 Paper Handling Sequence 3 Occurrence Result PAUSE button pressed Printer goes off or on line LF FF button pressed Printer performs a line feed LF FF button held down continuously The printer performs a form feed after the line feed Load Eject button pressed Paper is ejected to the front
10. 2 24 pins Figure 4 14 Machine Select Menu 4 In this menu highlight 24 pins by moving the cursor with T or J key and select it by pressing ENTER 5 After you select 24 pins the Setting File menu is displayed Program J10A00E Setting DEFSTD 9pins VRO 0 VR1 0 VR2 0 Setting File gt 1 DEFSTD EURSTD NLSP i ITALIC RUSSIAN Figure 4 15 Setting File Menu 1 2 3 4 5 6 In this menu highlight the destination factory settings by moving the cursor with T or 4 key and select the factory settings by pressing ENTER 7 After you select the factory settings the Main Menu is displayed Program J10A00E Setting DEFSTD 9pinss VRO 0 VR1 0 VR2 0 Main MENU Bi d Adjust gt 6 TPE LEVEL RESET Check Pro FF Check Pro A3 Check Pro A4 Check Pro Envelope Figure 4 16 Main Menu 1 2 3 4 5 8 In this menu highlight TPE LEVEL RESET by moving the cursor with T or J key and select it by pressing ENTER This operation prints the reset value of the TRE LEVEL automatically The reset value should be FFH Check that the reset value is FFH 9 To exit the program press ESC until the display returns to the MS DOS prompt 4 8 Rev A CHAPTER 5 Troubleshooting Table of Contents 5 1 OVERVIEW 5 1 5 2 TROUBLESHOOTING INFORMATION 5 1 Bl PRINTHEAD atada bit 5 1 5 2 2 SENSO Re a3 ink po ees et ee ue eed ies nde hee deer ee hig 5 2 523 MO
11. 5 VDC line Signal GND Signal GND 35 VDC line 35 VDC line Function Case open sensor signal Pause LED signal 5 VDC line Paper out LED signal Pitch select LED Pause button signal Tear off bin select LED Tear off bin select LED Pitch select LED Pitch select LED Not connected Font LED Font LED Signal GND Signal GND Font button signal Pitch button signal Tear off bin signal Operate button signal Load Eject button signal LF FF button signal Frame GND A 9 Appendix LQ 2170 Service Manual A 10 Rev A LQ 2170 Service Manual Appendix A 4 CIRCUIT DIAGRAMS Figure A 2 C165 MAIN Board Assembly Circuit Diagram Rev A A 11 Appendix LQ 2170 Service Manual A 12 Rev A LQ 2170 Service Manual Appendix Figure A 3 C165 PSB Board Assembly Circuit Diagram Rev A A 13 Appendix LQ 2170 Service Manual A 14 Rev A LQ 2170 Service Manual Appendix Figure A 4 C165 PSE Board Assembly Circuit Diagram Rev A A 15 Appendix LQ 2170 Service Manual A 16 Rev A LQ 2170 Service Manual Appendix A 5 CIRCUIT BOARD COMPONENT LAYOUTS Figure A 5 C165 MAIN Baord Assembly Component Layout Rev A A 17 Appendix LQ 2170 Service Manual Figure A 6 C165 PSB Board Assembly Component Layout A 18 Rev A LQ 2170 Service Manual Appendix Figure A 7 C165 PSE Board Assembly Component Layout Rev A A 19 Appendix LQ 2170 Service Manual A 6 EXPLODED DIAGRAMS Figure A 8 LQ 2170
12. Printer goes on or off line LF FF button pressed Printer performs a line feed LF FF button held down continuously Paper is ejected forward after the line feed LF FF button pressed and paper advanced more than the logical paper length The paper is ejected forward Load Eject button pressed The paper is ejected forward Micro Adjust T button pressed The printer micro feeds paper forward Micro Adjust J button pressed The printer micro feeds paper backward Release lever set to tractor position The beeper sounds Front paper end sensor detects that paper was loaded on the rear paper path The beeper sounds Rev A 1 27 Product Description LQ 2170 Service Manual 1 3 4 Paper Width PW Sensor Operation The PW sensor is mounted on the ribbon mask holder to measure the paper width and detect the top edge of the paper However in cases where print data is over the paper width the image cut function does not operate in all modes This section describes when the image cut function is operational as shown in the following table Table 1 40 PW Sensor Operation Paper Path Paper Width Measurement Image Cut Function Friction Measured Executed Only Copy Mode 2 Push Tractor Rear Front Measured Not Executed gt 1 Pull Tractor Measured Not Executed gt 1 The measured paper width value is used to estimate the printhead centerin
13. instructions Problem CR operation is abnormal Symptom When the printer is powered on the CR motor does not rotate at all The CR motor is defective Table 5 8 Repairing the Printer Mechanism Checkpoint Measure the coil resistance of the motor Resistance is approximately 2 7 ohms Solution Replace the CR motor Refer to page 3 12 When the printer is powered on the CR motor does not rotate all and all indicators blink CN11 is disconnected from the main board Check CN11 Connect CN1 1 correctly The CR motor can be rotated when the printer is powered on But the CR does not move The timing belt came off the pinon gear of the CR motor Check the engagement of the timing belt Reinstall the timing belt correctly Rev A The CR moves slightly and then stops Platen gap is too narrow Manually move the CR and check that it moves smoothly The proper platen gap is approximately 0 37 mm Adjust the platen gap properly Refer to page 4 2 Printer lacks lubrication or a foreign object is jammed between the oil pad and CR shaft Manually move the CR and check that it moves smoothly Check the surface of the CR shaft and oil pad Replace or lubricate the oil pad If any foreign object is jamming the carriage remove it and clean the surface of the CR shaft Then lubricate the CR shaft HP sensor is
14. BUSY heed aa NT lt _tready yl tbusy ACKNLG lt reply ig tack ALS Figure 1 8 Data Transmission Timing Table 1 32 Maximum and Minimum Timings for Data Transmission 500 nsec 500 nsec 500 nsec 0 500 nsec 500 nsec 10 us 0 a 120 nsec 200 nsec O The BUSY signal is active HIGH level under the conditions below O During data receipt If the input buffer is full If the INIT signal is active LOW level During hardware initialization In self test mode 00000 In adjustment mode O In default setting mode O The ERROR signal is active LOW level under the conditions below O Tf there is a fatal error If there is a paper out error O Ifthe cover is open cover open error PE signal is active HIGH level under the conditions below O Tf there is a paper out error 1 22 Rev A LQ 2170 Service Manual Product Description 1 3 2 2 Parallel Interface Reverse Channel Transmission mode TEEE P1284 nibble mode Adaptable connector 57 30360 Amphenol or equivalent Synchronization Refer to the IEEE P1284 Specification Handshaking Refer to the IEEE P1284 Specification Signal level TTL compatible IEEE P1284 level 1 device Data transmission timing Refer to the specification Table 1 33 Pin Assignments for Reverse Channel sie b In Out Function Description pal HostClk Host clock signal DATA1 Parallel input data to t
15. PC869 20 MAZOWAI 23 Estonia 26 PC866 LAT 04H 05H Page length for rear tractor 1 to 22 x 360 in units of 1 360 inch OOOOH 11 inches same as default 0F78H 11 06H 07H Page length for front tractor 1 to 22 x 360 in units of 1 360 inch 0000H 11 inches same as default 0F78H 11 08H 09H Page length for CSF bin 1 1 to 22 x 360 in units of 1 360 inch 0000H 22 inches same as default 1EFOH 22 OAH OBH Page length for CSF bin 2 1 to 22 x 360 in units of 1 360 inch OOOOH 22 inches same as default 1EFOH 22 OCH ODH TOF adjustment value for rear tractor 60 to 360 4 2 mm to 8 5 mm 1 inch in units of 1 360 inch 0000H 8 5 mm OEH OFH TOF adjustment value for front tractor 60 to 360 4 2 mm to 8 5 mm 1 inch in units of 1 360 inch 0000H 8 5 mm 10H 11H TOF adjustment value for front CSF bin1 60 to 360 4 2 mm to 8 5 mm 1 inch in units of 1 360 inch 0000H 8 5 mm 12H 13H TOF adjustment value for front CSF bin2 60 to 360 4 2 mm to 8 5 mm 1 inch in units of 1 360 inch 0000H 8 5 mm 14H 15H TOF adjustment value for rear manual insertion 60 to 360 4 2 mm to 8 5 mm 1 inch in units of 1 360 inch 0000H 8 5 mm 16H 17H TOF adjustment value for front manual insertion 60 to 360 4 2 mm to 8 5 mm 1 inch in units of 1 360 inch 0000H 8 5 mm
16. PRINTER DISASSEMBLY AND ASSEMBLY This section describes procedures for disassembling and assembling the main components of the printer When the procedure for installing a component is simply the reverse of removing the component this chapter does not describe the assembly procedure If necessary special notes on assembling or adjusting a component are given at the end of the description of each procedure Be sure to follow the instructions in these notes 07 184 WLO e Before disassembling any part of the printer note the warnings in Section 3 1 e Before beginning to disassemble the printer remove the paper and the ink ribbon Also disconnect the interface cable e Whenever the printer is repaired wipe the surface of the paper width PW sensor assembly with a soft cloth and keep it clean to avoid abnormal operation If the surface is dirty from any adhering material sensor sensitivity goes down and operation is not correct Note Exploded diagrams in the appendix show you how the components fit together Refer to them as necessary The flowchart below shows the order you need to use to disassemble the printer For details of the required adjustments refer to Chapter 4 pan Bi d adjustment is required 2 2 71 PG adjustment is required START Bi d 8 PG adjustment are required Bi d Adjustment amp Factory Setting are required when the parts is Di heorien dand interi bi replaced to new one isc
17. Printable Area for Roll Paper oooocoooococoooo oo 1 15 Table 1 19 Ribbon Specifications eaae 1 16 Table 1 20 Electrical Specifications for 120 V Versi0N 1 16 Table 1 21 Electrical Specifications for 220 240 V Version 1 16 Table 1 22 Environmental Conditions cee ee eee 1 17 Table 1 23 Reliability ni seat ted bei eae Ed Beek Re Peeks 1 17 Table 1 24 Safety Information for Printer Models 1 17 Table 1 25 CE Marandino ES 1 18 Table 1 26 Physical Specifications s an aaaea 1 18 Table 1 27 Hopper Capacity sarin o davis ads ees ade SS dae bee 1 18 Table 1 28 Stacker Capacity a aa nba A 1 19 Table 1 29 Environmental Conditions s aaan aeaaeae 1 19 Table 1 30 Character Tables aanne 1 20 Table 1 31 Pin Assignment of Forward Channel o o o o oooooo 1 21 Table 1 32 Minimum and Maximum Timings for Data Transmission 1 22 Table 1 33 Pin Assignments for Reverse Chamel o o o ooo 1 23 Table 1 34 Paper Handling Sequence 1 0 1 25 Table 1 35 Paper Handling Sequence 2 2 eee o 1 25 Table 1 36 Paper Handling Sequence B ooccoccccccccco 1 26 Table 1 37 Paper Handling Sequence 4 eee 1 26 Table 1 38 Paper Handling Sequence 5 eee o 1 27 Table 1 39 Paper Handling Sequence 6 a 1 27 Table 1 40 Paper Width Sensor Ope
18. R51 to determine the printhead drive pulse width Using the monitored voltage the CPU converts the voltage to a digital value and decides the printhead drive pulse width and then transports the data to the gate array via CPU port 19 Based on the monitored voltage the CPU decides the printing interval Port 73 monitors the printhead temperature to protect the printhead If the temperature exceeds 110 C 228 F printing is stopped 2 24 Rev A LQ 2170 Service Manual 2 3 4 CR Motor Driver Circuit The CR motor driver circuit is shown below SLA7024M 31 RSA Figure 2 35 CR Driver Circuit Operating Principles o CRA o CR A o CRB o CR B CRCOM 35V The carriage motor driver circuit controls the CR motor using an open loop constant drive arrangement 2 2 and 1 2 phases excite the motor A 2 2 phase step is equivalent to a 1 2 phase step doubled Ports 1 to 4 of the SLA7024M are used to change the excitation phase depending on the selected print mode Table 2 8 describes the motor driver modes Table 2 8 CR Motor Driver Modes Drive ee Print Speed Excitation T Speed Mode CPS Frequency Phase Applications 8 3 440 5280 2 2 Super Draft 3 330 3960 2 2 Draft 8 3 293 3 3520 2 2 Super Draft and Copy E Super Draft amp Power down 2 220 5280 1 2 Draft amp Copy 3 2 165 3960 1 2 Draft amp Power down Super draft amp Copy 8 Power down 1 KIQ con a Dr
19. Refer to the following figure Figure 3 3 Before Starting Disassembly Procedures Remove the paper eject cover and the front rear tractor assembly by pushing to release the hooks at both sides When remounting them be sure to snap the hooks on the projecting parts Rev A 3 5 Disassembly and Assembly LQ 2170 Service Manual 3 2 2 Removing the Panel Board Assembly 1 Remove the printer cover and ribbon cartridge see Section 3 2 1 2 Release the left clips for the panel board assembly by pushing them from the cutout located on the inside front of the upper housing assembly 3 Release the flexible flat cable FFC by pulling the lock cover for CN1 and then disconnect the FFC for CN1 and connector CN2 from the C165 PNL board assembly 5 NM Figure 3 4 Removing the Panel Board Assembly 4 Remove the panel board assembly from the upper housing assembly Assembly Notes Before disconnecting the FFC from CNI slide the lock cover for CN 1 as shown in Figure 3 5 and release the FFC from CNI After reconnecting the FFC for CNI lock the lock cover The FFC must be connected properly as shown in Figure 3 5 Exposed terminals must be connected face upward against the C165 PNL board Lock Cover for CN 1 Slide gt FFC Exposed terminals face ZZ lt 4 E Figure 3 5 Lock Cover for CN1 and the FFC 3 6 Rev A LQ 2170 Serv
20. and PW sensor which are photo diode switches The HP sensor detects CR home position when the photo diode rays are cut off by the printhead The rear PE sensor detects that paper has been loaded when the photo diode rays are cut off by the sensor plate which is included in the rear PE sensor The PW sensor used for paper width measurement and paper loading positioning detects the paper edge by comparing the measured voltage with standard voltage which was measured during the power on sequence Additionally as mentioned on the page 2 24 the 35 V line and head temperature are monitored to set the pulse length of the head drive signal Rev A 2 27 CHAPTER 3 Disassembly and Assembly Table of Contents 3 1 OVERVIEW 3 1 SKI PEC ACUSA pe Bad BN RN i en Era Sune Mae a 3 1 A MOS o a A o a DIOS 3 1 3 1 3 Service Checks After Repair 02 000 3 2 3 1 4 Specifications for BCreWS cenar cee wee ha BN or ade 3 3 3 2 PRINTER DISASSEMBLY AND ASSEMBLY 3 4 3 2 1 Before Starting Disassembly Procedures 000 200 eee 3 5 3 2 2 Removing the Panel Board Assembly 0002 22 eae 3 6 3 2 3 Removing the Printhead a Maka th eS thor Beth the Bort altho bon ets 3 7 3 2 4 Removing the HP Sensor os rb oie oo darned BUNGA DS NG 3 8 3 2 5 Removing the PW Sensor Assembly an 3 8 3 2 6 Removing the Platen Assembly 00 2c eee ee eee 3 10 3 2 7 Removing the Upper Housing Assembly
21. cable correctly Is the problem corrected FFC Is the problem corrected 5 9 Troubleshooting LQ 2170 Service Manual 5 4 REPAIRING C165 PSB PSE BOARD ASSEMBL Y This section provides instructions to repair a defective power supply board assembly It describes various symptoms likely causes and checkpoints Checkpoints refer to proper waveforms resistances and other values to check when evaluating the operation of any potentially faulty component Check these values and take the appropriate action Note This information is necessary only for servicers who repair to the component level Servicers who repair to the unit level including all servicers in the U S can ignore this section WARNING The OPERATE switch on the control panel only turns the secondary power circuit on or off so the primary circuit is live as long as the printer is connected to an AC power outlet Before you repair or touch the power supply board be sure to disconnect the AC power outlet Problem The 35 V and 5 V lines are not output when the printer is powered on The diode bridge DB1 is dead Table 5 6 Repairing the C165 PSB PSE Board Assembly Checkpoint Measure the DC voltage between the pins 3 and 4 of the DB1 Solution Replace the DB1 A The transformer coil is open Measure the resistance of T1 transformer coils at pins 12 15 9 1
22. corrected NO YES END Does the PW sensor work correctly see Table 5 2 Replace the sensor Replace the C166 MAIN board YES Is the problem corrected YES END NO Replace the C166 MAIN board y A Figure 5 5 Flowchart 3 5 8 Rev A LQ 2170 Service Manual 4 Abnormal Printing START Does the Operate button NO turn power on and off YES Do the control panel buttons Check them using a multimeter function OK YES Are they Replace the OK PNL board lA YES Is the a NO problem YES corrected 7 the FFC NO connected gt able correct correctly y YES corrected Is the problem Replace the FFC y Check Taine eo gt OK YES y Replace the C166 MAIN board y Aw Rev A corrected Is the problem p gt on the control panel using a multimeter Check the Operate button Is the Operate button OK connected correctly Check pin 19 of the FFC Is it OK NO YES y Replace the C166 PSB PSE board V Figure 5 6 Flowchart 4 NO p Replace the NO gt Connect the gt Replace the Troubleshooting PNL board Is the problem corrected
23. gt Lubrication Point Ref No 6 mmi Lubrication Point Ref No 7 Figure 6 4 Lubrication Points 5 6 and 7 Rev A 6 3 Appendix Table of Contents A 1 EXPANDED PRODUCTION COMMANDS A 1 A 2 EEPROM ADRESS MAP A 2 A 3 CONNECTOR SUMMARY A 5 A 4 CIRCUIT DIAGRAMS A 11 A 5 CIRCUIT BOARD COMPONENT LAYOUTS A 17 A 6 EXPLODED DIAGRAMS A 20 List of Figures Figure A 1 Cable Connections 35 caia hada kag NG ardid bara A 5 Figure A 2 C165 MAIN Board Assembly Circuit Diagram A 11 Figure A 3 C165 PSB Board Assembly Circuit Diagram A 13 Figure A 4 C165 PSE Board Assembly Circuit Diagram A 15 Figure A 5 C165 MAIN Board Assembly Component Layout A 17 Figure A 6 C165 PSB Board Assembly Component Layout A 18 Figure A 7 C165 PSE Board Assembly Component Layout A 19 Figure A 8 LQ 2170 Exploded Diagrams 1 eee eee A 20 Figure A 9 LQ 2170 Exploded Diagrams 2 cee eens A 21 Figure A 10 LQ 2170 Exploded Diagrams 3 aaa A 22 Figure A 11 CSF Bin 1 Exploded Diagrams 1 A 23 Figure A 12 CSF Bin 1 Exploded Diagrams 2 A 24 Figure A 13 CSF Bin 2 Exploded Diagrams aaa A 25 List of Tables Table A 1 Connector Summary 00 eee eee A 6 Table A 2 Connector Pin Assignments CN3 eee eee A 6 Ta
24. 420 mm 16 5 101 mm 4 0 420 mm 16 5 Thickness 0 065 mm 0 0025 0 14 mm 0 0055 0 065 mm 0 0025 0 14 mm 0 0055 Weight 52 3 g m 14 lb 90 g m 24 lb 52 3 g m 14 lb 90 g m 24 lb Quality Plain paper recycled paper Plain paper recycled paper Not curled folded or crumpled Not curled folded or crumpled Table 1 9 Specifications for Cut Sheets Multipart Front Entry Rear Entry Minimum Maximum Minimum Maximum Width 101 mm 4 0 420 mm 16 5 101 mm 4 0 420 mm 16 5 Length 147 mm 5 8 420 mm 16 5 101 mm 4 0 420 mm 16 5 Copies 1 original 4 copies 1 original 4 copies Total 0 12 mm 0 0047 0 39 mm 0 015 0 12 mm 0 0047 0 39 mm 0 015 thickness Weight gt 40 g m 12 Ib 58 g m 15 lb 40 g m 12 Ib 58 g m 15 lb Quality Plain paper recycled paper Plain paper recycled paper Not curled folded or crumpled Not curled folded or crumpled Binding A line of glue at the top or one side of the A line of glue at the top of the form form NA This weight is for one sheet of the multipart form 1 8 Rev A Printable area LQ 2170 Service Manual Product Description Figure 1 3 shows the printable area for cut sheets The table below defines the abbreviations used in the figure Table 1 10 Printable Area for Cut Sheets Abbreviations PW width Refer to Table 1 8 Single Sheet Multi
25. C8231 1 Local Talk I F card C82312 32KB IEEE 488 I F card C82313 Coax I F card C82314 Twinax I F card C82315 Ethernet I F card C82331 The number represented by an asterisk varies depending on the country Rev A 1 3 Product Description LQ 2170 Service Manual 1 2 Hardware Specifications This section provides detailed hardware specifications for the LQ 2170 1 2 1 Printing Method Printing method Impact dot matrix Color Black Number of pins 24 pins Pin arrangement 12 x 2 staggered Pin diameter 0 21 mm 0 00083 inch A O o pagpa 4 O 9 8 10 2 822 mm 8 72 Naba O Head Center O 5 6 Y O 0 847 mm 1 30 C Figure 1 2 Pin Configuration YA 3k The figure above shows the configuration of pins on the paper Print direction Bidirectional with logic seeking for text and unidirectional for graphics Bidirectional printing of graphics can be selected with a printer setting or software command 1 4 Rev A LQ 2170 Service Manual Product Description 1 2 2 Printing Specifications Copy capability 1 original 4 copies Print speed and printable columns Table 1 4 Print Speed and Printable Columns Print Speed cps Print Mode Character Pitch Printable Columns Normal Multipart High speed draft Draft Draft condensed LQ Condensed
26. Carbonless multipart Plain paper Recycled paper Carbonless multipart Plain paper Recycled paper Carbonless multipart Binding Dots of glue or paper staples both sides Dots of glue or paper staples both sides Dots of glue or paper staples both sides Rev A LQ 2170 Service Manual Product Description Printable area The figure below shows the printable area for continuous paper Each abbreviation is defined in the following table Table 1 15 Printable Area for Continuous Paper Abbreviations Continuous Paper PW width Refer to Table 1 14 PL length Refer to Table 1 14 LM left margin 13 mm 0 51 or more RM right margin 13 mm 0 51 or more TM top margin 4 2 mm 0 17 or more 0 17 BM bottom margin 4 2 mm 0 17 or more lt PW gt O O O O O O oy IT an NI OO O o gt O fe O NG a O O PL A E 5 O UD O O O O lt O w O AN Na Figure 1 5 Printable Area for Continuous Paper Rev A 1 13 Product Description LQ 2170 Service Manual Continuous Paper with Labels Paper media specifications The following table gives the specifications for continuous paper with labels Table 1 16 Specifications for Continuous Paper with Labels Front Entry Rear Entry Bottom Entry Minimum Maximum Minimum Maximum Minimum Maximum Label size See the figure below See
27. Che tet teh ease 1 16 1 2 6 Electrical Specifications ad de Sea 1 16 1 2 7 Environmental Conditions a ers KANA AA ose sare Beis Gee ANNIE 1 17 20 FIGIADINY tol o ead os e dd alee goed 1 17 29 Dale Approv lSi s si id A O 1 17 1 2 10 CE Marking ANA RO 1 18 1 2 11 Physical Specifications 2 cielo ck up Se eb rr de ake 1 18 1 2 12 Cut Sheet Feeder SpecificationS ooooooocoommmoo 1 18 1 3 Firmware Specifications 1 20 1 3 1 Control Codes and ROMS pu es wena ee vias eke eeu Sue 1 20 1 3 2 Interface Specifications gt parar iso ees 1 21 1 3 2 1 Parallel Interface Forward Channel oo o oooooooo 1 21 1 3 2 2 Parallel Interface Reverse Channel o oooooooo 1 23 1 3 2 3 Interface Selection alas 1 24 1 3 2 4 Preventing the Host from Data Time out 1 24 1 3 3 Paper Handling Firmware Specifications o o ooooo 1 25 1 3 4 Paper Width Sensor Operation annann anane 1 28 1 4 Operating Instructions 1 29 1 4 1 Control Panel Operation citaba prat 1 29 1 4 2 Status Codes Indicated by the LEDs and Beeper 1 30 1 4 3 Micro Adjustment Function licencia ewe Dee 1 31 1 4 4 Tear Off Function bas 1 31 1 4 5 Self test Function dd o A a e e 1 32 1 4 6 Hexadecimal Dump Function 000 eee eee ee 1 32 1 4 7 Default Setting Foncea a 1 33 1 4 8 EEPROM Clear Function uta rs 1 33 1 4 9 Bidirectional Adjustment Function 000 eee eee eee
28. Exploded Diagrams 1 A 20 Rev A LQ 2170 Service Manual Appendix Figure A 9 LQ 2170 Exploded Diagrams 2 Rev A A 21 Appendix LQ 2170 Service Manual Figure A 10 LQ 2170 Exploded Diagrams 3 A 22 Rev A LQ 2170 Service Manual Appendix Figure A 11 C S F Bint Exploded Diagrams 1 Rev A A 23 Appendix LQ 2170 Service Manual Figure A 12 C S F Bint Exploded Diagrams 2 A 24 Rev A LQ 2170 Service Manual Appendix Figure A 13 C S F Bin2 Exploded Diagrams Rev A A 25 Appendix LQ 2170 Service Manual Table A 15 Part No Reference Table A 26 Rev A LQ 2170 Service Manual Appendix Table A 15 Part No Reerence Table Continue Rev A A 27 Appendix LQ 2170 Service Manual A 28 Rev A EPSON Printed in Japan 95 12 05 5
29. Format 1B 7C 00 04 00 01 FE 80 in hex dl e Parameter dl EEPROM address e Range dl 00H lt dl lt 7FH 3 Write Data to Specific EEPROM Address e Format 1B 7C 00 05 00 04 FB 02 in hex dl d2 e Parameters dl EEPROM address d2 Byte of data to be written e Range dl 00H lt dl lt 7FH d2 00H lt d2 lt FFH Will not accept addresses 0OOHor 02H 4 Set Print Mode e Format 1B 7C 00 04 00 03 FC 81 in hex dl e Parameter dl Print speed bit 0 ESC mode 1 not fixed 0 bit 1 Head hot mode 1 not fixed 0 bit 2 Head cold mode 1 not fixed 0 bit 3 Heavy duty mode 1 not fixed 0 bit 4 Thick paper mode 1 not fixed 0 bit 5 Reserved bit 6 Power down mode 1 not fixed 0 bit 7 Normal mode 1 not fixed 0 e Range 00H 2 d lt 05H 5 Compare Data at Selected EEPROM Addresses e Format IB 7C 00 05 00 05 FA 82 in hex dl d2 e Parameters dl EEPROM address d2 Address of data to be compared e Range dl 00H sd lt 7FH d2 00H lt d2 lt FFH Rev A A 1 Appendix LQ 2170 Service Manual A 2 EEPROM ADDRESS MAP Address 00H 01H Reserved Data Format Default Area 1 02H 03H Character table selection 0 PC437 3 PC863 4 PC865 6 BRASCII 7 Abicomp 9 Romans 10 PC437Greek 12 PC853 13 PC855 15 PC864 16 PC866 18 ISOLatintT 19 ISO8859 7 21 Code MJK 22 Bulgaria 24 PC774 25 ISO Latin2 1 PC850 2 PC860 5 PC861 8 ISO Latin 1 11 PC852 14 857 17
30. Lever i Sub Assembly Gears Gear 15mm Gear Paper Eject 15 5mm Transmission 10 mm Gear A Figure 3 41 Engaging 13 Gears Rev A 3 27 Disassembly and Assembly LQ 2170 Service Manual 3 3 2 Disassembling Paper Support Block Assembly 1 Remove the CSF gear cover Refer to step 1 in Section 3 3 1 2 Remove the stepping motor Refer to steps 2 and 3 in the Section 3 3 1 3 Remove the E ring fixing the right edge of the paper feed shaft Figure 3 42 Removing the E ring 4 Remove 1 gear 29 mm from the right edge of the paper feed shaft Figure 3 43 Removing 1 Gear 29mm 5 Remove the paper feed shaft by pulling it toward the right side 6 Remove the CPB tight 3 x 8 screw securing the paper support shaft to the right CSF frame as shown in the following figure CPB tight Screw 3X8 Figure 3 44 Removing the CBP Tight 3 x 8 Screw 3 28 Rev A LQ 2170 Service Manual Disassembly and Assembly 7 Remove the paper support assembly along with the paper support shaft and paper shaft holder by pulling upward Figure 3 45 Removing the Paper Support Block Assembly 8 Remove both paper feed rollers from both paper support assemblies 9 Remove both paper loading roller cover assemblies by releasing the clips fixing them to the paper support assembly Paper Support Assembly Paper Loading Roller Cover l Figure 3 46 Removing the Paper Loading Roller Cover Assembly 10 Remove the paper s
31. Maximum Minimum Maximum Width 216 mm 8 5 Length mO Thickness 0 07 mm 0 0028 0 09 mm 0 0035 Weight 52 3 g m 14 lb 82 g m 22 Ib Quality Plain paper recycled paper Not curled folded or crumpled Printable area Figure 1 7 gives the printable area for roll paper Each abbreviation is defined in the following table Table 1 18 Printable Area for Roll Paper PW width See Table 1 17 PL length See Table 1 17 LM 3 mm 0 12 or more RM 3 mm 0 12 or more TM 4 2 mm 0 17 or more BM 4 2 mm 0 17 or more Figure 1 7 Printable Area for Roll Paper Rev A 1 15 Product Description 1 2 5 Ribbon Specifications LQ 2170 Service Manual Table 1 19 Statistics on the Ribbon Type Fabric Color Black Ribbon life 8 million characters draft 10 cpi 48 dots character Dimension 506 0 mm W x 123 5 mm D x 23 0 mm H 19 92 W x 4 86 D x 91 H 1 2 6 Electrical Specifications Tables 1 20 and 1 21 provide statistics on electrical ratings and consumption Table 1 20 Electrical Specifications for the 120 V Version Rated voltage 120 VAC Input voltage range 103 5 to 132 VAC Rated frequency range 50 to 60 Hz Input frequency range 49 5 to 60 5 Hz Rated current 1 0 A max 2 6 A Power consumption Approx 62 W self test in draft mode at 10 cpi Insula
32. NLQ mode turn the printer off to finish the adjustment Rev A LQ 2170 Service Manual Adjustment 4 2 3 Factory Settings This section describes the procedure to reset factory settings which is necessary 1f the main board or EEPROM is replaced You can perform this procedure only with the Settings Diskette Notes e After you select factory settings in the Setting File menu be sure to run the check program in the Main Menu Running the check program writes the selected factory settings to the EEPROM and prints several check patterns 1 Insert the Settings Diskette into Drive A of the PC and turn PC power on 2 Type GWBASIC and press ENTER 3 Load and run the J10A00E program The program displays the Machine Select Menu shown below Program J10A00E Setting DEFSTD 9 pins VRO 0 VR1 0 VR2 0 Printer select gt 1 9 pins 2 24 pins Figure 4 11 Machine Select Menu 4 In this menu highlight 24 pins by moving the cursor with the T or J key and select it by pressing ENTER 5 After you select 24 pins the Setting File menu is shown Program J10A00E Setting DEFSTD 9pins VRO 0 VR1 0 VR2 0 Setting File gt 1 DEFSTD EURSTD NLSP i ITALIC RUSSIAN Figure 4 12 Setting File Menu 1 2 3 4 5 6 In this menu highlight the destination factory settings by moving the cursor with T or 4 key and select the destination factory settings by pressing ENTER 7 After you select the factory
33. Operating Principles 2 1 5 Paper Paths This section describes various paper paths through the printer mechanism These paper paths are divided into four groups depending on which entrance top rear bottom or front is used to feed paper The printer has two PE paper end sensors The front PE sensor is located in front of the printer mechanism The rear PE sensor is located behind the printer mechanism Refer to the following figure p Paper Eject Drive Roller Printhead Paper Eject Assembly Platen Platen Cover Middle Paper Guide Rear PE Sensor Rear Driven PF Roller Front Driven PF Roller Lower Driven PF Roller Paper Drive Roller Front Paper Guide Front PE Sensor Figure 2 11 Paper Paths and PE Sensor Locations 1 Top Entrance Figure 2 12 shows the paper path for friction feed using the top entrance The top entrance is only used with the friction feed method When the top entrance is used the rear PE sensor detects when the paper is out Figure 2 12 Friction Feeding Using the Top Entrance Rev A 2 11 Operating Principles LQ 2170 Service Manual 2 Rear Entrance Figures 2 13 2 14 and 2 15 show the paper paths for tractor feeding using the rear entrance You can use the rear entrance with any of the following paper feed methods push tractor feed pull tractor feed or push pull tractor feed When you use the rear entrance the rear PE sensor detects when paper is out
34. PSE Board Assembly 0000 eee ee 1 36 Figure 1 15 C165 PNL Board Assembly a 1 37 Figure 1 16 Printer Mechanics roo we ae 1 37 Figure 1 17 Housing Assembly X4 2s 5 aba Kahn e cava e be de 1 38 List of Tables Table 1 1 Items Included with the Printer oooo ooooooo 1 3 Table 1 2 Constables aa ama ma BA rt ad re on 1 3 Table 1 3 OptonalJnitS aa oF alana os tel ts dose 1 3 Table 1 4 Print Speed and Printable Columns 2 0005 1 5 Table 1 5 Print RESOUN g rara Se wd a 1 5 Table 1 6 Paper Path and Paper Types eee eee ee eee 1 6 Table 1 7 Paper Thickness Lever Positions 002000 eee ees 1 7 Table 1 8 Specifications for Cut Sheets Single Sheet not Multipart 1 8 Table 1 9 Specifications for Cut Sheets Multipart 1 8 Table 1 10 Printable Area for Cut Sheets 0 1 9 Table 1 11 Specifications for Envel0pes oooooococooccoono 1 10 Table 1 12 Specifications for Card Stock o oooooocoooooooo 1 10 Table 1 13 Printable Area for Envelopes and Card Stock 1 11 Table 1 14 Specifications for Continuous Paper Single Sheet and Multipart 1 12 Table 1 15 Printable Area for Continuous Paper 1 13 Table 1 16 Specifications for Continuous Paper with Labels 1 14 Table 1 17 Specifications for Roll Paper a 1 15 Table 1 18
35. Resolution Table 1 5 Print Resolution Print Mode Horizontal Density Vertical Density Adjacent Dot Printed High speed draft 90 dpi 180 dpi Draft 120 dpi 180 dpi Draft condensed 240 dpi 180 dpi NLQ 360 dpi 180 dpi 60 80 90 or 120 dpi 60 dpi 8 pin bit image 120 or 240 dpi 60 dpi 24 pin bit image 60 90 120 or 180 dpi 180 dpi 360 dpi 180 dpi Raster graphics 180 or 360 dpi 180 or 360 dpi Acoustic noise 53 dB A ISO 7779 pattern Rev A 1 5 Product Description LQ 2170 Service Manual 1 2 3 Paper Handling Specifications Feeding method Friction feed front rear Push tractor feed front rear Push and pull feed front rear bottom Feeder Front push tractor rear push tractor CSF bin 1 bin 2 optional Pull tractor optional and roll paper holder optional Paper path Manual insertion Front or rear in top out CSF Rear in top out Tractor Front rear or bottom in top out Line spacing 1 6 inch or programmable in increments of 1 360 inch Feed speed 1 6 inch feed 45 msec Continuous feed 0 127 m sec 5 0 inches sec Release lever Set the release lever using the following table Table 1 6 Paper Path and Paper Types Paper Types Card Stock Envelopes Lever Position Front insertion Rear insertion Friction CSF bin 1 CSF bin 2 Roll paper holder Paper Entrance Single Sheet Labels Multipart Roll Paper Front Push tractor Push pull Rear
36. Sensor PE Front Sensor PW Sensor Printhead T U eg D 3 n o Case Open Sensor Board Assy C165PNL Host Computer Parallel I F Board Assy C166 MAIN Option I F Figure A 1 Cable Connections Rev A A 5 Appendix LQ 2170 Service Manual Table A 1 Connector Summary Connector Function Parallel interface Type B interface C165 PSB PSE board assembly HP sensor Rear PE sensor Front PE sensor PW sensor Printhead Printhead PF motor CR motor Release lever position sensor MAIN Board Assembly PG sensor CSF bin 1 PNL board assembly Table A 2 Connector Pin Assignments CN3 Y 5 Signal Name Function 35 VDC line 35 VDC line 35 VDC line 5VDC line 5VDC line 35 V line overload setection signal Power on off switch signal OONDOOARWND Table A 3 Connector Pin Assignments CN4 PET So nal Name CR home position signal N Signal GND 5V 5 VDC Table A 4 Connector Pin CN5 RA Signal Name 5V 5 mo a PE Rear paper end signal GND Signal ground A 6 Rev A LQ 2170 Service Manual Appendix Table A 5 Connector Pin es CN6 eae Signal Name GND Signal GND Table A 6 Connector Pin Assignments CN7 E TOP paper end signal Signal GND 5 VDC line 5 VDC line Table A 7 Connector Pin Assignments CN8 Signal Name Function
37. TOF Position Bottom Margin 11 inches 8 5 mm 0 333 inches 11 inches Page Format Friction CSF Bin 1 Bin 2 Manual Feed Rear Front Page Length TOF Position Bottom Margin 22 inch 8 5 mm 0 333 inch 22 inches Print Direction Bi d Auto LF Off Auto Tear Off Off 1 inch Skip High Speed Draft Input Buffer BDC ST Reply Roll Paper I F Selection Auto I F Mode Auto I F Wait Time 10 sec Software ESC P2 Slashed Zero Buzzer A G M IBM Mode Auto CR IBM Mode Adjust Tear Off Position 0 inch Paper Conditions Rev A Friction Bin 1 Tractor Tear Off Status Off 1 33 Product Description LQ 2170 Service Manual 1 4 9 Bidirectional Adjustment Function Pressing the Pause button while turning on the printer puts the printer in bidirectional adjustment mode In this mode you can adjust the bidirectional alignment for the following three modes 1 High speed draft mode 2 Draft mode 3 LQ mode For instructions on performing the adjustment see Chapter 4 1 5 Initialization 1 5 1 Software Initialization This initialization is activated by the control code ESC This initialization O Clears unprinted data O Resets the printer s setting defaults 1 5 2 Operation Initialization This initialization is activated by receipt of the INIT signal negative pulse This initialization O C
38. defective Check the operation of the HP sensor Refer to page 5 2 Replace the HP sensor Refer the page 3 8 Troubleshooting Problem CR operation is abnormal LQ 2170 Service Manual Table 5 8 Repairing the Printer Mechanism Symptom The CR moves slightly and then stops A foreign object is jammed between both terminals of the HP sensor Checkpoint Check the HP sensor Solution Remove the any foreign object CN4 connector removed from the HP sensor Check the connection of the connector Connect the CN4 correctly The CR moves to the left side HP side and strikes the frame of the printer The HP sensor is defective Check the operation of the HP sensor Refer to page 5 2 Replace the HP sensor Printing is abnormal No image is printed Common wires in the printhead FFC are disconnected or there is no continuity Check the common wires in the printhead FFC Replace the printhead FFC The printer does not print a particular dot The printhead is defective Measure the coil resistance of the printhead The resistance should be approximately 16 4 ohms Refer to page 5 1 Replace the printhead The printhead FFC is disconnected or there is no continuity Check the continuity in the FFC Replace the printhead FFC Printing is uneven on both edges of the column Platen parallelism
39. end has been detected because accuracy of paper feeding cannot be assured 3 Pull tractor feed Set the release lever to the PULL position Load paper from the front rear or bottom entrance The front or bottom entrance is recommended for thick paper or labels Remove the paper eject assembly and attach the pull tractor unit Insert paper from either from the front or bottom Multipart paper must be carbonless Do not perform reverse feeds Rev A 1 7 Product Description LQ 2170 Service Manual 4 Push pull tractor feed Set the release lever to the REAR PUSH FRONT PUSH position Load paper from the front or rear entrance Remove the paper eject assembly and attach the pull tractor unit Remove any slack in the paper between the platen and pull tractor Precisely adjust the horizontal position of the pull tractor and push tractor Multipart paper must be carbonless Do not perform reverse feeds greater than 1 6 inch Do not perform reverse feeds after the paper end has been detected 1 2 4 Paper Specifications This section describes the printable area and types of paper that can be used in this printer Cut Sheets Paper media specifications The following table shows specifications for cut sheets Table 1 8 Specifications for Cut Sheets Single Sheet Not Multipart Front Entry Rear Entry Minimum Maximum Minimum Maximum Width 101 mm 4 0 420 mm 16 5 101 mm 4 0 420 mm 16 5 Length 147 mm 5 8
40. g m 12 Ib 5 Card stock weight 192 g m 51 Ib thickness 0 22 mm 0 0087 6 1 original 5 copies thickness 0 36 mm 0 0142 Reliability MCBE 2x 10 cycles Environmental conditions Table 1 29 Environmental Conditions E Operating Non Operating Temperature 5 to 35 C 41 to 95 F 30 to 60 C 22 to 140 F Humidity 15 to 80 RH 3 1 3 30 to 605 RH k 2 4 5 to 85 RH 3 sel Single sheets plain 64 g m lt weight lt 82 g m 17 Ib lt weight lt 22 Ib 2 Single sheets plain weight lt 64 g m2 2 g m lt weight weight lt 17 lb 22 Ib lt weight Single sheets recycled multipart envelopes and card stock 3x3 Without condensation Rev A 1 19 Product Description LQ 2170 Service Manual 1 3 Firmware Specifications This section provides detailed information about LQ 2170 firmware 1 3 1 Control Codes and Fonts ESC P2 and IBM 2390 2391 plus emulations Control codes Typefaces International character sets Character tables Standard Version NLSP Version 1 20 Bitmap fonts Scalable font EPSON Draft EPSON Roman EPSON Sans Serif EPSON Courier EPSON Prestige EPSON Script EPSON OCR B EPSON Orator EPSON Orator S EPSON Script C EPSON Roman EPSON Sans Serif EPSON Roman T EPSON Sans Serif H Bar code fonts EAN 13 EAN 8 Interleaved 2 of 5 UPC A UPC E Code 39 13 countries Code 128 POSTNET 10 cpi 12 cpi 15 cpi 1
41. is not adjusted properly Check the platen parallelism Refer to page 4 2 Adjust the platen parallelism The printed result is too light The printhead is defective Check if the tip of the dot wire is worn Replace the printhead The platen gap is too wide Check the platen gap Refer to page 4 2 Adjust the platen gap properly Abnormal paper feed 5 16 The PF motor does not rotate at all The PF motor is defective Measure the coil resistance of the PF motor The value is approximately 16 ohms Replace the PF motor Rev A LQ 2170 Service Manual Problem Abnormal paper feed Table 5 8 Repairing the Printer Mechanism Symptom The PF motor does not rotate at all CN10 is disconnected from the main board Checkpoint Check CN10 Troubleshooting Solution Connect CN10 correctly The rear or front PE sensor is defective Check the operation of the rear and front PE sensors Refer to page 5 2 Replace the rear or front PE sensor Refer to page 3 23 The rear or front PE sensor is not mounted correctly Check the mounting position Mount the rear or front PE sensor into the proper position When the printer is powered on paper is ejected automatically and then the printer becomes Ready A foreign substance is sticking to the surface of the PW sensor Check the surface o
42. paper park position Load Eject button pressed and the paper was advanced to skip area Paper is advanced to the next TOF position Micro Adjust T button pressed The printer micro feeds paper forward Micro Adjust J button pressed The printer micro feeds paper backward Release lever was set to Friction The beeper sounds Front paper end sensor detects that paper was loaded in the rear paper path The beeper sounds e Printer status Printer is on line not in the pause state No PE sensor detects that paper is loaded The printer is set to CSF The release lever is set to the Friction Table 1 37 Paper Handling Sequence 4 Occurrence Result Print command sent The paper is loaded from the CSF Pause button pressed Printer goes off line LF FF button pressed Paper is loaded from the CSF Load Eject button pressed Paper is loaded from the CSF Micro Adjust T button pressed No operation Micro Adjust J button pressed No operation Release lever set to tractor position The paper path is changed to tractor Rear Front paper end sensor detects that And 3 seconds have passed paper is loaded in the rear or front paper path The printer feeds paper Rear Front paper end sensor detects that And Pause LF FE or LOAD EJECT button was pressed paper is loaded in the rear or front paper path Ignore
43. printer mechanism see Section 3 2 10 Remove the left frame assembly see Section 3 2 10 5 Remove 2 CBS screws 3 x 8 F Zn securing the RD assembly to the front frame Remove the RD assembly from the front frame XNA A KR N Remove the timing belt from the RD assembly Driven Pully Assembly RD Assembly Figure 3 27 Removing the RD Assembly ssembly Notes Notice how the gears in the RD assembly are engaged Refer to the following figure The tightening torque for the CBS screw 3 x 8 F Zn 0 78 0 98 N m 8 10 Kg cm Adjust the platen gap and perform the bidirectional print alignment See Chapter 4 Rachet RD ge Combination Spring 7 g 23 g pl D Driven Pulley Assembly umr rom Spur Gear 11 mm Figure 3 28 Engaging Gears for the RD Assembly 3 20 Rev A LQ 2170 Service Manual Disassembly and Assembly 3 2 10 7 Removing the CR Assembly 1 Remove the rear front edge guide assembly front cover paper eject assembly rear front tractor unit and printer cover 2 Remove the panel board see Section 3 2 2 and upper housing assemblies see Section 3 2 7 3 Remove the printer mechanism see Section 3 2 10 4 Remove the left frame assembly see Section 3 2 10 5 and RD assembly see Section 3 2 10 6 5 Disconnect 3 FFCs from the printhead and PW sensor assembly PW Sensor Assembly CB Screw 2 x 5 F Zn Figure 3 29 Disco
44. ribbon feed RF motor paper end PE sensor home position HP sensor platen gap PG sensor release lever sensor etc Figure 1 16 Printer Mechanism Rev A 1 37 LQ 2170 Service Manual Product Description 1 6 5 Housing Assembly This consists of printer cover assembly edge guide assembly upper housing lower housing assembly etc 17 Housing Assembly Figure 1 Rev A 1 38 CHAPTER 2 Operating Principles Table of Contents 2 1 PRINTER MECHANISM OPERATION 2 1 1 Printing Mechanism 2 1 3 Platen Gap Adjustment 2 1 4 Paper Handling Mechanism 2 1 4 1 Release Lever 2 1 4 2 Paper Advance Mechanism 2 1 5 Paper Paths 2 1 6 Ribbon Advance Mechanism 2 2 POWER SUPPLY OPERATION 2 1 2 Carriage Movement Mechanism aaa 2 2 1 Power Supply Overview 2000 ce eee eee 2 2 2 Power Supply Circuit Operati0N ooooooooooo 2 3 CONTROL CIRCUIT 2 3 1 Control Circuit Operation Overview 2 3 2 System Reset Circuit 2 3 3 Printhead Drive Circuit 2 3 4 CR Motor Drive Circuit 2 3 5 PF Motor Drive Circuit 2 3 6 EEPROM Control Circuit 2 3 7 Sensor Circuits ee eee Figure 2 1 Figure 2 2 Figure 2 3 Figure 2 4 Figure 2 5 Figure 2 6 Figure 2 7 Figure 2 8 Figure 2 9 List of Figures Printhead Operation ss eed ssi NT pao Carriage Movement Mechanism snaa nananana aaae Platen Gap Adjust Lever ts Aa laos Release MIC nd AA RR E eka Friction Adva
45. than 32 7 2 75 V PC1 turns off and then Q2 also turns off Consequently switching FET Q1 operates again Repeating the above operation keeps the 35 V line at 35 V 6 4 35V Line Overload Detection Circuit The 35 V line voltage drop protection circuit is shown in the figure below 35V Line ZD84 5V Line GND Line Q31 GND Figure 2 26 35 V Line Overload Detection Circuit When the 35 V line is overloaded it means that constant voltage control is not being maintained In this condition the forward current of PC1 drops to 0 A Consequently voltage Vf between PC1 and D81 also drops On this circuit when the Vf voltage drops below 1 3 V 35 V line 33 1 V IC528 detects the overload and outputs the PWDN signal 5 V HIGH active to port 20 of the CPU When the CPU receives this PWDN signal printing stops When the 35 V line becomes normal again the voltage between PC1 and D81 also becomes normal When the Vf voltage goes above 1 6 V 35 V line 33 4 V the PWDN signal is removed Rev A 2 19 Operating Principles LQ 2170 Service Manual 5 35 V Line Over Current Protection Circuit The 35 V line over current control circuit is illustrated below R54 35V Line GND Q31 Figure 2 27 35 V Line Over Current Protection Circuit When the 35 V line becomes less than 27 V Q82 and Q54 turn on and PC1 turns on Consequently Q32 and Q31 turn off and then switching FET Q1 shuts off When the prote
46. the check list in Table 3 3 which provides a record to make servicing and shipping more efficient Table 3 3 Inspection Check List for the Repaired Printer Category Component Item to Check Is Check Required Printhead Are any wires broken Checked Not necessary Are any wires worn out Checked Not necessary Carriage Does the carriage move smoothly Checked Not necessary mechanism _ Movement noisy Mechanism dirty _ Mechanism oily Is the CR motor at the _ Checked _ Not necessary correct temperature not overheating Paper Is paper advancing smoothly Checked _ Not necessary advance _ Movement noisy Mechanism dirty mechanism _ Mechanism oily Is the paper feed motor running L Checked _ Not necessary at the correct temperature not overheating Paper path Is the type of paper in the printer _ Checked Not necessary feeding smoothly Is the tractor feeding the paper L Checked _ Not necessary correctly Is the paper path clear of all Checked Not necessary obstructions Is the platen free of damage L Checked Not necessary Ribbon Is the ribbon mask free of distortion _ Checked Not necessary mask Self test Was the self test successful Checked _ Not necessary On line test Was the on line test successf
47. wire A 4 8 Figure 4 16 Manian toi et LANANG eon a toate 4 8 Table 4 1 Required Adjustment aaaea 4 1 Table 4 2 Required Adjustment Tool o 4 1 LQ 2170 Service Manual Adjustment 4 1 ADJUSTMENT OVERVIEW 4 1 1 Required Adjustments This section describes what adjustments are required after any part is removed or replaced The following table shows the relationship between the repaired item and the adjustment Table 4 1 Required Adjustments f Bi d Print Factory TPE Level Repaired Item Adjustment Alignment Settings Reset Printer Mechanism Replacement O 2 Main Board Replacement O EEPROM Replacement PW Sensor Assembly Replacement Platen Assembly Replacement or Removal CR Motor Assembly Replacement or Removal Right Frame Assembly Replacement or Removal Right Frame Disassembly Left Frame Replacement or Removal RD Assembly Replacement or Removal CR Assembly Replacement or Removal X 1 means adjustment is not required X 2 O means adjustment is required When any part is replaced or reassembled use the Check Program included on the Settings Diskette and check the performance and settings of various check patterns 4 1 2 Required Adjustment Tools The following table shows the tools required for each adjustment Table 4 2 Required Adjustment Tools Platen Gap Thickness Gauge B776702201 Bi
48. 0 cpi 12 cpi 15 cpi proportional 10 cpi 12 cpi 15 cpi proportional 10 cpi 12 cpi 15 cpi 10 cpi 12 cpi 10 cpi 10 cpi 10 cpi 10 cpi Proportional 10 5pt 8pt 32pt every 2 pt 10 5pt 8pt 32pt every 2pt 10 5pt 8pt 32pt every 2pt 10 5pt 8pt 32pt every 2pt U S A France Germany U K Denmark 1 Sweden Italy Spain 1 Japan Norway Denmark2 Spain2 Latin America The standard version has 11 character tables and the NLSP version has 20 character tables as shown in the following table Table 1 30 Character Tables Character Tables Italic PC 437 U S Standard Eur PC 850 Multilingual PC 860 Portuguese PC 861 Icelandic PC 863 Canadian French PC 865 Nordic Abicomp BRASCII Roman 8 Italic ISO Latin 1 PC 437 US Standard Eur PC 850 Multilingual PC 437 Greek PC 852 East Europe PC 853 Turkish PC 855 Cyrillic PC 857 Turkish PC 866 Russian PC 869 Greek MAZOWAI Poland Code MJK CSFR ISO 8859 7 Latin Greek ISO Latin 1T Turkish Bulgaria Bulgarian Estonia Estonia PC 744 LST 1283 1993 ISO Latin 2 PC 866 LAT Latvia PC 864 Arabic Rev A LQ 2170 Service Manual Product Description 1 3 2 Interface Specifications This printer provides a bidirectional 8 bit parallel interface and a Type B optional interface slot standard 1 3 2 1 Parallel Interf
49. 00 3 27 Figure 3 42 Removing the E ring ee eee eee ee 3 28 Figure 3 43 Removing 1 Gear 29mm 0000 0c cece eee ees 3 28 Figure 3 44 Removing the CPB Tight Screw 0 0 aaa 3 28 Figure 3 45 Removing the Paper Support Block Assembly 3 29 Figure 3 46 Removing the Paper Feed Roller Cover 3 29 Figure 3 47 Removing the Paper Eject Cover Assembly 3 30 Figure 3 48 Assembling the Paper Eject Cover Assembly 3 30 Figure 3 49 Removing the Right CSF CovVer o occooccococcccooo o 3 31 Figure 3 50 Engaging 5 Gears alar 3 31 Figure 3 51 Removing the E ring and 2 CBS Screws 3 32 Figure 3 52 Removing the Paper Feed Roller Cover 3 32 List of Tables Table 3 1 Recommended Tools 2000 e eee eee eee 3 1 Table 3 2 Equipment Required for Maintenance 0 00e 3 1 Table 3 3 Inspection Check List for Repaired Printer 3 2 Table 3 4 Screw Types and Abbreviations 000 eee eee eee 3 3 LQ 2170 Service Manual Disassembly and Assembly 3 1 OVERVIEW This section describes various points to note when disassembling and assembling the printer 3 1 1 Precautions Follow the precautions below for disassembly or assembly ARNING Before disassembling assembling or adjusting the printer disconnect the power supply cable from the AC power so
50. 1 7 8 3 4 Replace the T1 5 10 Q1 is dead Check that the resistance between the source and drain is infinite Check the voltage waveform between the source and drain of the Q1 Replace the Q1 PC1 is dead Check the voltage waveform between pins 3 and 4 of the PC1 Replace PC1 Rev A LQ 2170 Service Manual Troubleshooting Table 5 6 Repairing the C165 PSB PSE Board Assembly Continued Problem The 35 V and 5 V lines are not output when the printer is powered on Q32 is dead Checkpoint Check that the resistance between the collector and emitter is infinite Solution Replace the Q32 A Q31 is dead Check that the resistance between the source and drain is infinite Replace the Q31 The 5 V line is not output 1C51 is dead Check the voltage waveform at pin 8 of IC51 The voltage waveform is as follows Check the voltage at pin 12 of IC51 Replace IC51 Q51 is dead Check the voltage waveform between emitter and collector of Q51 Replace Q51 L51 is short Check the resistance between both terminals of L51 Replace L51 The PWDN signal is constantly
51. 1 34 1 5 Initialization 1 34 1 5 1 Software NM aliIZalOM ise wo ete welder Pee ve ieee eee oe wee ee 1 34 1 5 2 Operation Initialization coi wes 1 34 1 5 3 Power On Initialization AA 1 34 1 6 MAIN COMPONENTS 1 35 1 6 1 C165 MAIN Board Assembly oooocccccccn eee 1 36 1 6 2 C165 PSB PSE Board Assembly seine a hia of fare teed eas 1 36 1 6 3 C165 PNL Board Assembly case Ss are eke FSG Se dis bees Waste 1 37 1 6 4 Printer Mechanism ssis odia ae dee veer eee ari 1 37 1 6 5 HOUSING Assembly inc E he eae ig A 1 38 List of Figures Figure 1 1 Exterior View of the LQ 2170 0 2 ee eee 1 2 Figure 1 2 Pin CONTIGUOS 1 4 Figure 1 3 Printable Area for Cut Sheets 0 0 aa 1 9 Figure 1 4 Printable Area for Envelopes and Card Stock 1 11 Figure 1 5 Printable Area for Continuous Paper 1 13 Figure 1 6 Label Size eye ete a ro e ti 1 14 Figure 1 7 Printable Area for Roll Paper ooooooooooooooo 1 15 Figure 1 8 Data Transmission Timing eee eee ee 1 22 Figure 1 9 Control Panel e resetea te Jae he nee es aoe ed Ana 1 29 Figure 1 10 Self test Prine 2 56 22 thrid ee Murata a ea aes 1 32 Figure 1 11 Hexadecimal Dump Printout oooomooooom m 1 32 Figure 1 12 Main Components 000 cece e eee eee ees 1 35 Figure 1 13 C165 MAIN Board Assembly 0 00 e eee ee eee 1 36 Figure 1 14 C165 PSB
52. 2 Release both locks for the left and right bushings 8 mm by pushing the lever holder for the bushings outside and then pulling the holder lever forward Left and Right Bushings 8mm UA AS LEGO N NT XII Wan D Za Sal a Qi AQ 9 NI Figure 3 11 Releasing the Locks for the Bushings 3 Slide the platen assembly to the right and move the printhead to the right edge 4 Pull the left edge of the platen assembly upward by tilting it backward and then pull up the right edge of the platen assembly Figure 3 12 Removing the Platen Assembly Assembly Notes Before reinstalling the platen assembly into the printer mechanism move the printhead to the right edge of the CR shaft and set the release lever to the tractor position This pre assembly operation helps you mount the platen assembly more easily After installing the platen assembly into the printer mechanism make sure both locks for left and right bushings 8 mm are locked completely Be careful handling the lever holders for the left and right bushings 8 mm These are fragile Adjust the platen gap Refer to Chapter 4 3 10 Rev A LQ 2170 Service Manual Disassembly and Assembly 3 2 7 Removing the Upper Housing Assembly 1 Remove the rear edge guide assembly paper eject assembly rear tractor unit and printer cover see Section 3 2 1 Remove the panel board assembly see Section 3 2 2 Remove 4 CBB screws 4 x 14 F Zn securing the u
53. 2 7 Push Tractor Operation Using the Front Paper Entrance 2 7 Rev A Operating Principles LQ 2170 Service Manual 3 Pull Tractor Method The pull tractor advances paper in basically the same way as the push tractor The push tractor is installed at the paper entrance and pushes paper into the printer On the other hand the pull tractor is installed at the paper exit and pulls paper out of the printer mechanism As a result the paper tension unit is not required Figure 2 8 illustrates pull tractor operation when paper is fed through the bottom paper entrance Figure 2 8 Pull Tractor Operation Using the Bottom Paper Entrance 2 8 Rev A LQ 2170 Service Manual Operating Principles 4 Push Pull Tractor Method The push pull tractor method is a combination of the push and pull tractor methods Two tractors are used to advance the paper one at the front paper entrance and the other at the rear paper entrance They operate simultaneously to push and pull the paper through the printer mechanism Figure 2 9 illustrates push pull tractor operation when paper is fed through the rear paper entrance Figure 2 10 illustrate push pull tractor operation when paper is fed through the front entrance Figure 2 9 Push Pull Tractor Operation Using the Rear Paper Entrance Rev A 2 9 LQ 2170 Service Manual Operating Principles Figure 2 10 Push Pull Tractor Operation Using the Front Paper Entrance Rev A 2 10 LQ 2170 Service Manual
54. 3 Lubrication POINTS 0 ers ghee hd OG les 6 3 Figure 6 4 Lubrication Points 5 6 and7 cece eee eee eee 6 3 List of Tables Table AE OM 21 524 niet AA e DN LAAN eats eR ee eS 6 1 Table 6 2 Lubrication Points LQ 2170 Service Manual Maintenance 6 1 PREVENTIVE MAINTENANCE Preventive maintenance includes regular cleaning of the exterior case using denatured alcohol as well as occasional vacuuming of the mechanism interior to remove dust and paper debris After cleaning the unit check that it is adequately lubricated as described in Section 6 2 below Before returning the printer to the customer inspect springs paper feed rollers and basic operation 07 184 WLO Disconnect the printer from the external AC power source before performing maintenance Do not use thinner trichloroethylene or ketone based solvents on the plastic components of the printer 6 2 APPLYING LUBRICATION EPSON recommends the printer be lubricated at the points illustrated in Figure 6 1 Table 6 2 lists each point along with its recommended lubricant The recommended lubricants are EPSON G 26 and O 2 which have been tested extensively and found to comply with the needs of this printer Table 6 1 provides details about these lubricants Before applying a lubricant be sure the surface to be lubricated is clean Do not apply too much lubricant as this may damage nearby parts Table 6 1 Lubrication Grease G 26 40 gm
55. 3 1 Screw Types and Abbreviati0NS oocoooccooooooo 3 3 Figure 3 2 Flowchart for Disassembling the Printer 3 4 Figure 3 3 Before Starting Disassembly Procedures 3 5 Figure 3 4 Removing the Panel Board Assembly 3 6 Figure 3 5 Lock Cover for CN1 and the FFC 00 005 3 6 Figure 3 6 Removing the Printhead 2 2 2 eee eee eee eee 3 7 Figure 3 7 Connecting the Printhead FFCs 0000 eee cues 3 7 Figure 3 8 Removing the HP Sensor cee eee eee ees 3 8 Figure 3 9 Removing the PW Sensor Assembly a 3 8 Figure 3 10 Mounting Position for the PW Sensor Assembly 3 9 Figure 3 11 Releasing the Locks for the Bushings 3 10 Figure 3 12 Removing the Platen Assembly 000 0 eee 3 10 Figure 3 13 Releasing the Upper Housing Assembly Hooks 3 11 Figure 3 14 Removing the Upper Housing Assembly 3 11 Figure 3 15 Removing the Case Open Sensor Assembly 3 12 Figure 3 16 Removing the CR Motor Assembly 2000000 3 12 Figure 3 17 Removing the Printer Mechanism a 3 13 Figure 3 18 Removing the PF Motor cee eee 3 14 Figure 3 19 Removing the PG Sensor Assembly 0 05 3 15 Figure 3 20 Removing the Right Frame Assembly 25 3 16 Figure 3 21 Removing the Ri
56. 3 2 10 2 Removing the PG Sensor Assembly 1 w Remove the rear front edge guide assembly front cover paper eject assembly rear front tractor unit and printer cover see Section 3 2 1 Remove the panel board see Section 3 2 2 and upper housing assemblies see Section 3 2 7 Remove the printer mechanism see Section 3 2 10 Remove the hexagon nut standard M4 securing the PG sensor assembly to the right frame assembly Q Hexagon Nut Standard M4 Figure 3 19 Removing the PG Sensor Assembly ssembly Notes The tightening torque for the hexagon nut standard M4 1 18 1 37 Nm 12 14 Kg f cm When securing the shaft push the front CR guide shaft to the bottom of the cutout Rev A Disassembly and Assembly LQ 2170 Service Manual 3 2 10 3 Removing the Right Frame Assembly 1 Remove the rear front edge guide assembly front cover paper eject assembly rear front tractor unit and printer cover see Section 3 2 1 2 Remove the panel board see Section 3 2 2 and upper housing assemblies see Section 3 2 7 3 Remove the printer mechanism see Section 3 2 10 CR motor assembly see Section 3 2 9 PF motor see Section 3 2 10 1 and PG sensor assembly see Section 3 2 10 2 4 Remove the hexagon nut standard M4 securing the gap adjust lever Then remove the gap adjust lever from the right frame assembly Remove 2 CBS screws 3 x 6 F Zn securing the platen cover Rem
57. 70 10 at 25 C 77 F CR Motor Place one lead on pin 5 and the CN11 other lead on each of 4 test pins 16 Q 10 at 25 C 77 F Place one lead on pin 1 and other PF Motor lead on pin 2 CN10 Place one lead on pin 3 and other lead on pin 4 5 2 4 Error Codes with Indicators and Buzzer Table 5 4 Indicators and Buzzer Error Condition Indicator Paper Out Taar On Paper Out On Paper Jam Blinks Head Hot Blinks Cover Open On Fatal Error Blinks Blinks Blinks Blinks Blinks K1 O indicates that the beep sounds for 100 ms with an interval of 100 ms indicates that the beep sounds 500 ms with an interval of 100 ms Rev A 5 3 Troubleshooting LQ 2170 Service Manual 5 3 UNIT LEVEL TROUBLESHOOTING You may be able to identify the defective unit just from the symptom displayed The table below provides the symptoms for a number of failures Once you identify the problem refer to the flowchart listed in the right hand column of the table below to determine the cause of the problem Table 5 5 Symptoms and Problem Descriptions Problem Description Flowchart No e Carriage does not move at all Flowchart 1 e When the printer is powered on the CR moves away from home position after a moment and stops All indicator LEDs on the control panel blink Abnormal CR Operation Paper does not feed at all Flowchart 2 When the pr
58. 81 00 81 00 81 00 81 00 81 00 81 00 nonunanaunaae un 81 00 81 00 81 00 81 00 81 00 81 00 81 00 81 00 Mar e 81 00 81 00 81 00 81 00 81 00 81 00 81 00 81 00 ween 81 00 91 00 91 00 03 OF FB 03 BO F6 00 02 EO 00 naaa nas EO FA 00 02 70 00 3C F8 00 02 EO 01 CO C3 00 OF SS 07 FE FA AT CN AT EN AN PA ER EN EA an A7 En ee A er ary Figure 1 11 Hexadecimal Printout 1 32 Rev A LQ 2170 Service Manual Product Description 1 4 7 Default Setting Function Pressing the Pitch button while turning on the printer puts the printer in default setting mode Some default printer settings can be changed in this operation The method for setting defaults is described in the instruction sheets which are printed out immediately after you enter the mode You are asked to use three buttons Font Pitch and Tear Off Bin and watch six LEDs Pitch 3 LEDs Tear Off Bin 2 LEDs and Pause 1 LED on the control panel Refer the instructions printed in default setting mode for the actual method used to set defaults 1 4 8 EEPROM Clear Function Pressing the Font and Tear Off Bin buttons while turning on the printer resets the EEPROM to the standard factory settings This operation initializes the items below to the factory settings in the right hand column Table 1 45 EEPROM Initialization Settings Font Roman Pitch 10 CPI Character Table PC437 Other Font Selection Roman T Page Format Tractor Rear Front Page Length
59. C166 MAIN board the sensor operate Clear the jam rear PE sensor operate correctly Replace the sensor p co Y Replace the C166 MAIN board corrected Is the problem YES Rev A Is the roblem rrected END correctly Replace the sensor Is the problem corrected Is the problem corrected NO Connect them correctly YES Does the release sensor operate correctly Replace the C166 MAIN board END Figure 5 4 Flowchart 2 1 corrected Is the problem 5 7 Troubleshooting LQ 2170 Service Manual 3 Abnormal Control Panel Operation Continued from flowchart 2 Is When cut sheet paper is loaded NO paper loaded is it ejected PC correctly but continuous automatically paper not loaded at all Connect CN7 connected correctly correctly Connect CN12 nn connected correctly correctly Is the problem corrected Is the problem corrected YES Replace the cable the release sensor operate correctly see Table 5 2 Replace the sensor Is the problem corrected YES Is the problem
60. Detector Circuit Figure 2 27 35V Line Over Current Protection Circuit Figure 2 28 5V Line Over Current Protection Circuit Figure 2 29 5V Constant Voltage Control Circuit Figure 2 30 Control Circuit Block Diagram 0002 eee eee Fig re 2 31 Dala FIOW a chert wierd pew ornare Aasa Figure 2 32 Reset GICUI a2 hae hea iS Figure 2 33 Reset Signal Output Timing 00 22 ee eee Figure 2 34 Printhead Drive Circuit 0 0000 eee eee Figure 2 35 CR Drive Circuit ice eat eee eee eS ad dois Figure 2 36 PF Motor Drive Circuit 0 0 000 cee eee Figure 2 37 EEPROM Control Circuit 000 2 eee eee FIQUIC 2 36 SCNSOr Circuit ree genes mea Na Sh ge hee ee er nag tag wees Tae Table 2 1 Table 2 2 Table 2 3 Table 2 4 Table 2 5 Table 2 6 Table 2 7 Table 2 8 List of Tables CR Motor Assembly Specifications ooooooooooo Platen Gap and Print Speed imita ds abad win ebb eee ee bors Release Lever Position 00 002 eee ees Ribbon Advance Gear Linkage 00220 e ooo Power Supply Board cee toa gate mediante ae ane Power Supply Output Voltage and Applications Functions of the Main IC a te len aie edi a hen a dea da ad CR Motor Drivedviode tana ta ante KANA aera sees AA LQ 2170 Service Manual Operating Principles 2 1 PRINTER MEC
61. ECHNICIANS IN THEIR LINE OF WORK WHEN PERFORMING TESTING AS DISCATED WITHIN THIS MANUL DO NOT CONNECT THE UNIT TO A POWER SOURCE UNIT INSTRUCTED TO DO SO WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS WARNING REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE LISTED ON THE SERIAL NUMBER RATIG PLATE IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFERENT FORM THE AVAILABLE POWER SOURCE DO NOT CONNECTE IT TO THE POWER SOURCE ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND OR INDDIVIDUAL CHIPS IN ORDER TO PROTECT SENSITIVE m P CHIPS AND CIRCUITRY USE STATIC DISCHARGE EQUIPMENT SUCH AS ANTI STATIC WRIST STRAPS WHEN ACCESSING INTERNAL COMPONENTS REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS RECOMMENTED BY THE MAANUFACTURE INTRODUCTION OF SECOND SOURCE ICs OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY PREFACE This manual describes functions theory of electrical and mechanical operations maintenance and repair of the FX 2170 The instructions and procedures included herein are intended for the experienced repair technician and attention should be given to the precau
62. EPROM control circuit IC 8 EEPROM Figure 2 37 EEPROM Control Circuit The EEPROM is controlled by CPU ports 9 P70 10 P71 11 P72 and 12 P73 Port 11 is the data output line used to save the information to the EEPROM and port 12 is the data input line used to read the saved data from the EEPROM Port 70 is the chip select line and port 71 is the clock timing line When the PWDN signal power down is detected on port 20 INTO the CPU writes the necessary data to the EEPROM before the 5 V line drops to 4 75 V 2 26 Rev A LQ 2170 Service Manual Operating Principles 2 3 7 Sensor Circuits The CPU detects conditions of the following sensors home position HP sensor release sensors 1 and 2 platen gap PG sensor rear and front paper end PE sensors paper width PW sensor and cover open sensor 5V 5V 76 5V Rear PE 4 P HP Sensor Sensor q 4 N Release 64 E Sensor 2 Front PE Release Sensor Sensor 1 ca PG Sensor 1 PW Sensor Hp PG Sensor 2 AR Cover Open Sensor 5V 5V 5V 5V 5V 5V 5V Figure 2 38 Sensor Circuits Two types of sensors are used in this printer Release sensors and 2 PG sensors the front PE sensor and cover open sensor are momentary switches Pages 2 3 and 2 4 describe the relationship between release and PG sensor operation and actual print operation The other type of sensor is used for the HP sensor rear PE sensor
63. EPSON B702600001 Oil 0 2 40 cc EPSON B703700001 Table 6 2 Lubrication Points Lubrication Points Quantity Lubricant Cam surface on the 34 5 mm spur gear 2 mm width halfway The platen gap adjustment slots on the right 2 mm width from the frame top slot to the 3rd from the bottom The shaft end of drive roller assembly and the About 1 2 the size of a cutout section on the left frame grain of rice Oil pad half of the pad RD planetary shaft and planetary lever leaf About 1 2 the size of a spring grain of rice RD housing About 1 2 the size of a Side of shafts 3 points grain of rice Inside hole 1 point RD Assembly About 1 2 the size of a Gear teeth 5 points grain of rice Note Lubrication must be applied during the reassembly process For lublication points refer to the figure on the next page Rev A 6 1 Maintenance LQ 2170 Service Manual Cam Clutch Tractor Spur Gear 34 5 gt Lubrication Point Ref No 1 al Lubrication Point Ref No 3 Figure 6 1 Lubrication Points 1 and 3 Gap Adjust Lever Platen Gap Adjustment Slot Lubricate all these slots Lubrication Point Ref No 2 Figure 6 2 Lubrication Point 2 6 2 Rev A LQ 2170 Service Manual Maintenance Pat Lubrication Point Ref No 4 Figure 6 3 Lubrication Point 4 ES mm offs e AI SG map Lubrication Point Ref No 5
64. EPSON TERMINAL PRINTER LQ 2170 EPSON 4005735 NOTICE e All right reserved Reproduction of any part of this manual in any form wharsoever without SEIKO EPSON s express written permission is forbidden e The contents of this manual are subject to change without notice e All efforts have been made to ensure the accuracy of the contents of this manual However should any errors be detected SEIKO EPSON would greatly appreciate being informed of them e The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual or the consequences thereof Copyright 1995 by SEIKO EPSON CORPORATION Nagano Japan PRECAUTIONS Precautionary notations throughout the tect are categorized relative to 1 personal injury and 2 damage to equipment DANGER Singnals a precaution which if ignored could ressult in serious or fatal personal injury Great caution should be exercised in performing procedures preceded by a DANGER headings WARNING Singnals a precaution which if ignored could result in damage to equipment The precautionary measures itemized below should always be observed when performing repair maintenance procedures pa 2 DANGER ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND THE HOST COMPUTER BEFORE PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMIAR WITH BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS T
65. HANISM OPERATION This section describes the printer mechanism and explains how it works 2 1 1 Printing Mechanism The printing mechanism is composed of the printhead ink ribbon and ribbon mask The printhead is an 24 pin 12 pins x 2 head for impact dot printing To improve the durability of the dot wires they are arranged on the printhead in 2 columns Each wire has its own drive coil which causes the wire to move in and out of the printhead to print each dot The four steps below describe how these driving wires work 1 A drive signal transmitted from the control circuit to the printhead drive circuit is converted to the proper printhead driving voltage which energizes a corresponding coil The energized coil then causes the iron core to become magnetized 2 The magnetic force draws the actuating plate toward the core and the dot wire which is connected to the core rushes toward the platen When the dot wire impacts the platen pressing against the ribbon and paper it prints a dot 4 When the driving voltage stops energizing the coil the magnetic force from the iron core vanishes The actuating plate returns to its original position the position before coil was energized with spring action The dot wire also returns to its original position This is the sequence used to print a single dot The mechanism is equipped with a built in thermistor for head temperature detection The temperature detected by the thermistor is co
66. HIGH Rev A IC52 is dead Check whether the voltage of pin 6 is more than 1 3 V or not If the voltage is more than 1 3 V IC52 is dead Replace IC52 Troubleshooting LQ 2170 Service Manual 5 5 REPAIRING THE C165 MAIN BOARD ASSEMBLY This section provides instructions to repair the C165 MAIN board assembly It describes various problems symptoms likely causes and solutions The checkpoint column provides proper waveforms resistance values and other information for each component of C165 MAIN Note repair to the unit level including all servicers in the U S can ignore this section This information is necessary only for servicers who repair to the component level Servicers who Table 5 7 Repairing the C165 MAIN Board Assembly Problem Cause Checkpoint Check the voltage waveforms of the VCC signal CH1 IC10 pin 3 and VOUT signal CH2 IC10 pin 1 when power is turned on The printer ee ache ele IO go ae AE does not Reset IC10 is defective operate at all CH2 GND DO Ds 00 PO N N N lt lt I sl TAN m m na Solution Replace IC10 The PROM IC3 is not Check for a change in the signal from Replace IC2 or selected HIGH LOW at pin 137 of IC2 replace the main board A GND m CH1 1V BAMPILE Sub S
67. LS PRINTER 1 3 2 3 Interface Selection The printer has 2 interfaces the parallel interface and Type B optional interface These interfaces are selected manually in default setting mode or selected automatically Manual selection One of 2 interfaces can be selected in default setting mode Automatic selection Automatic interface is enabled in default setting mode In automatic interface mode the printer is initialized to the idle state where it scans which interface is to be activated The interface that receives data first is selected When the host stops data transfer and the printer is in standby for a number of seconds specified in default setting mode the printer returns to the idle state As long as the host sends data or the printer interface is busy the selected interface remains active Interface state and interface selection When the parallel interface is not selected that interface goes into a busy state When the Type B serial interface card is installed and it is not selected the interface sends an XOFF code and sets the DTR signal to MARK When the optional interface is not selected the printer sends disable commands to the optional interface When the printer is initialized or returned to the idle state the parallel interface goes into the ready state the serial interface sends an XON code and sets the DTR signal to SPACE and the printer sends an enable command to the optional interface Remember that interrupt sign
68. LSP version 20 tables 64KB 53 dB A ISO 7779 pattern Total print volume 7 5 million lines except printhead MTBF 6000 power on hours POH Printhead life 400 million strokes wire Ribbon life 8 million characters Bidirectional parallel interface IEEE P1284 nibble mode supported Type B I F Level 2 option ESC P2 and IBM 2390 2391 plus emulation 1 original 4 copies Font Pitch Pause Tear off Bin LF FF Load Eject Micro Adjust Default setting Refer to Figure 1 1 on the next page for an exterior view of the FX 2170 Roll paper is not available on all models and not available in the U S Rev A LQ 2170 Service Manual Product Description Figure 1 1 Exterior View of the LQ 2170 Rev LQ 2170 Service Manual Product Description 1 1 2 Accessories e Items included in the printer carton Table 1 1 Items Included with the Printer Enclosed Items Quantity User s guide Driver diskette Ribbon cartridge Power cord e Consumables Table 1 2 Consumables Consumable Item Part Number Ribbon cartridge S015083 Ribbon pack S010031 e Options Table 1 3 Optional Units rn High capacity cut sheet feeder 1 bin 1 C80673 Second bin cut sheet feeder 2 bin 2 C80674 Pull tractor unit C80032 Roll paper holder 8310 Serial I F card C82305 C82306 32KB intelligent serial I F card C82307 C82308 32KB intelligent parallel I F card C82310
69. Push tractor Push pull Full Pull front bottom release Pull rear gt This symbol after OK means you need to check the paper type before using it with this paper path 1 6 Rev A LQ 2170 Service Manual Product Description Paper thickness lever Set the paper thickness lever to the appropriate position as indicated in the following table Table 1 7 Paper Thickness Lever Positions Paper Thickness inches Paper Thickness mm Lever Position Minimum Maximum Minimum Maximum Precautions for Handling Paper 1 Friction feed Set the release lever to the FRICTION position and install the paper eject assembly Load paper from the front or top entrance Do not use continuous paper Do not perform any reverse paper feeds within the top 8 5 mm 0 33 inch and bottom 22 mm 0 87 inch area Do not perform reverse feeds greater than 1 6 inch after the paper end has been detected Use the paper tension unit Insert the multipart cut sheet forms only from the front 2 Push tractor feed Set the release lever to the REAR PUSH FRONT PUSH position and install the paper eject assembly Load paper from the rear or front entrance Release the friction feed mechanism Multipart paper must be carbonless Use the paper tension unit Do not perform reverse feeds greater than 1 6 inch Do not perform reverse feeds after the paper
70. TORS ns o sun oe BA naam Dto e ie IOS Chale beaten ase eee ste be 5 3 5 2 4 ERROR CODES WITH THE INDICATORS AND BUZZER 5 3 5 3 UNIT LEVEL TROUBLESHOOTING 5 4 5 4 REPAIRING THE C165PSB PSE BOARD ASSEMBLY 5 10 5 5 REPAIRING THE C165 MAIN BOARD ASSEMBLY 5 12 5 6 REPAIRING THE PRINTER MECHANISM 5 15 List of Figures Figure 5 1 Printhead Connector Pin Alignment a 5 1 Figure 5 2 Flowchart F stone 5 5 Figure 5 3 Flowchant 2 issue ria rd as aa 5 6 Figure 5 4 Flowchart elit A A ye oat eau 5 7 Figure 5 5 Flowchart 3 ee iiss tee ese Wace tee ewe cana precede NENA 5 8 Figure 5 6 Flowchart Fa ae us doo e er oe cba ou Oss 5 9 List of Tables Table 5 1 Printhead Coil Resistance Test Points 5 1 rable S 2 Sensor Test Roms 2 td edi 5 2 Table 5 3 Motor Test ROMS 2 523 06 awoke AAA eek 5 3 Table 5 4 Indicators and Buzzer ccc een Se ee ee rama oe eee 5 3 Table 5 5 Symptoms and Problem Descripti0NS oooooooo 5 4 Table 5 6 Repairing the C165 PSB PSE Board Assembly 5 10 Table 5 7 Repairing the C165 MAIN Board Assembly 5 12 Table 5 8 Repairing the Printer Mechanism 0000 5 15 LQ 2170 Service Manual Troubleshooting 5 1 OVERVIEW This chapter contains flowcharts and checkpoint tables to help you troubleshoot the printer Flowcharts let you isolate a faulty unit based on abnormal symptoms The checkpoint tables let you identify the faulty p
71. abcdefghijklmnopars X8 0123456789 lt gt ABCDEFGHI JKLMNOPQRSTUVWXYZ _ abcdefghijklmoparsti BA 0123456789 lt gt 7 ABCDEFGHI JKLMNOPQRSTUVWXYZ _ abcdefghijklmnoparstu KB k 0123456789 lt gt ABCDEFGHI JKLMNOPOQRSTUVWXYZ _ abcdefghijklmoparstuw Be 0123456789 lt gt ABCDEFGHI JKLMNOPQRSTUVWKYZ _ abcedefghijklmnoparstuvw Sans serif k 0123456789 lt gt GABCDEFGHI J KLMNOPQRSTUVWXYZE _ abcdefghijklmnopaqrstuvwxy k 0123456789 5 lt gt 7 ABCDEFGHI JKLMNOPORSTUVWXYZ NT T abedefghijklmnopqrstuvwxy x 0123456789 5 lt gt 2 ABCDEFGHI JKLMNOPOQRSTUVWXYZ J _ abcdefghijklmnopgqrstuvwxy z Figure 1 10 Self test Printout 1 4 6 Hexadecimal Dump Function Pressing the Load Eject and LF FF buttons while turning on the printer puts the printer in hexadecimal dump mode In this mode data received is printed out in hexadecimal format along with the corresponding ASCII characters The function is useful to check data received from the host If a received code is not a printable ASCII character the printer prints a period in the ASCII column When received data remains in the buffer that data is printed by pressing the Pause button Hex Dump 1B 40 1h 28 47 01 00 01 18 28 355 01 00 0A 1B 55 ula Ga A Ol 1B 28 43 02 00 70 10 1B 28 63 04 00 3C 00 70 A A 10 1B 2B 30 1B 2 01 14 14 18 CO 05 81 00 81 00 A bannun 81 00 81 00
72. ace Forward Channel Transmission mode 8 bit parallel IEEE P1284 compatibility mode Adaptable connector 57 30360 Amphenol or equivalent Synchronization STROBE pulse Handshaking BUSY and ACKNLG signals Signal level TTL compatible IEEE P1284 level 1 device Table 1 31 Pin Assignments for Forward Channel Return In Out GND pin Function Description STROBE Strobe pulse Input data is latched at falling edge of the signal DATA1 Parallel input data to the printer bit 0 LSB DATA2 bit 1 DATA3 bit 2 DATA4 bit 3 DATA5 bit 4 DATA6 bit 5 DATA7 bit 6 DATA8 bit 7 MSB ACKNLG This signal negative pulse indicates the printer has received data and is ready to accept more data BUSY This signal s HIGH level means the printer is not ready to accept data PE This signal s HIGH level means the printer has a paper out error SLCT Always HIGH when the printer is powered on AFXT Not used INIT This signal s negative pulse initializes printer ERROR This signal s LOW level means the printer is in an error state SLIN Not used Logic H This line is pulled up to 5 V through 3 3KQ resistor 5V This line is pulled up to 5 V through 3 3KQ resistor Chassis Chassis GND GND Signal GND NC Not connected Rev A 1 21 Product Description LQ 2170 Service Manual DATA N y t hold STROBE seug tstb gt tnext
73. aft amp Copy amp Power down LQ 3 4 82 5 1980 1 2 Bit Image amp Power down 2 3 73 4 1760 1 2 LQ 8 Copy LQ 8 Power down We 329 tee a LQ amp Copy amp Power down The SLA7024M IC12 CR motor driver circuit detects and regulates the amount of current flowing in the carriage motor coil The current flowing through the coil varies depending on the speed of the CR motor The CPU sets the amount of current via the Address Data line Signals are sent to ports 3 RFA and 14 RFB of the SLA7024M The SLA7024M sets the coil current depending on the CR speed Rev A 2 25 Operating Principles LQ 2170 Service Manual 2 3 5 PF Motor Driver Circuit The figure below shows the PF motor driver circuit 1C6 741832 PG PG 13 12 P27 CPU UDN2917EB Figure 2 36 PF Motor Driver Circuit The gate array receives phase data from the CPU via ports 5 PG10 6 PG11 7 PG12 and 8 PG13 converts the data to UDN2917 form and then sends that phase data to ports 43 PH1 and 26 PH2 The PF driver current is controlled by the 74LS32 using port 68 PF1 and 67 PF2 signals output from the gate array and port 61 P27 output from the CPU These controlled drive currents are output to ports 2 110 1 111 23 120 and 24 121 of the UDN2917EB 2 3 6 EEPROM Control Circuit The EEPROM is non volatile memory that stores information even if the printer power is off The figure below shows the E
74. als such as the INIT signal on the parallel interface are not effective unless that interface is selected 1 3 2 4 Prevention Hosts from Data Transfer Time out Generally hosts abandon data transfer to peripherals when the peripheral is in the busy state for dozens of seconds continuously To prevent hosts from this kind of time out the printer receives data very slowly several bytes per minute even if the printer is in the busy state This slowdown is started when the rest of the input buffer becomes several hundreds of bytes Finally when the input buffer is full the printer is in busy continuously 1 24 Rev A LQ 2170 Service Manual 1 3 3 Paper Handling Sequence Product Description In this section paper handling firmware sequences are described in several cases e Printer status Printer is on line not in the pause state No PE sensor detects that paper is loaded The release lever position is set to continuous paper Table 1 34 Paper Handling Sequence 1 Occurrence Result Print command sent Continuous paper is loaded Pause button pressed Printer enters pause state LF FF button pressed Continuous paper is loaded Load Eject button pressed Continuous paper is loaded Micro Adjust T button pressed No operation Micro Adjust J button pressed No operation Release lever set to Friction The paper path is changed for cut sheets Printer status
75. art or unit by checking the values or ranges listed for each component 5 2 TROUBLESHOOTING INFORMATION This section gives troubleshooting information to let you check test points for replaceable units 5 2 1 Printhead 5 1 Printhead Coil Resistance Test Points Test Method Common Pin No Set meter to ohms Disconnect Meter Reading the printhead after the printer is powered off Refer to the Refer to the Place one lead on each pin andthe 16 4 10 Q following figure other lead on each common pin at 25 C 77 F following figure 3 X 15 C5 2 C6 5 16 11 C7 17 C8 X 14 4 8 F i E F X 1 9 13 7 Ci X 18 C2 12 C3C4X 6 10 T T X T Thermistor terminal X Not used Figure 5 1 Printhead Connector Pin Alignment Rev A 5 1 Troubleshooting 5 2 2 Sensors Sensor Connector Number Test Pin Number CN4 HP Sensor LQ 2170 Service Manual Table 5 2 Sensor Test Points Test Method Set Meter to DC Voltage Place one lead on pin 1 and the other lead on pin 2 and check the voltage while blocking the two sensor terminals Meter Reading Open 5 V Home position Short 0 V Not home A A Rear PE Sensor A A Place one lead on pin 2 and the other lead on pin 3 and check the voltage while toggling the sensor lever Open 5 V Paper loaded Short 0 V No paper A A Front PE Sensor GND Place one lead
76. as shown in the following illustration 7 Loosen the hexagon nut standard M4 securing the PG adjust lever while setting the PG adjust lever to the second slot position from the rear of the printer mechanism PG Adjust Lever PG SW PG Adjust Slot Figure 4 2 Setting the PG Adjust Lever 8 Insert the thickness gauge vertically between the printhead and platen 4 2 Rev A LQ 2170 Service Manual Adjustment 9 11 Insert a thin screwdriver into the drilled hole located at the right edge of the rear CR guide shaft and adjust the platen gap by moving the screwdriver to forward or backward until the gap is large enough for a 0 36 mm thickness gauge but too narrow for a 0 40 mm thickness gauge When the gap is correct at the 5th column check the platen gap at the 80th and then the 130th column positions Figure 4 3 Platen Gap If the platen gap is wider at the 5th column than the 130th column adjust the parallelism for the rear CR guide shaft by moving the parallelism adjustment bushing backward If the platen gap is more narrow for the 5th column than the 130th column adjust the parallelism of the CR guide shaft by moving the parallelism adjustment bushing forward Refer to the following figure Parallelism Adjustment Bushing Figure 4 4 Adjusting the Parallelism of the CR Guide Shaft Continue performing adjustment steps 8 to 11 until the platen gap is correct at all 3 positions After completing the adjust
77. ble A 3 Connector Pin Assignments CN4 eee eee A 6 Table A 4 Connector Pin Assignments CN5 eee eee A 7 Table A 5 Connector Pin Assignments CN6 0 2 A 7 Table A 6 Connector Pin Assignments CN7 eee eee A 7 Table A 7 Connector Pin Assignments CN8 a A 8 Table A 8 Connector Pin Assignments CN9 eee eee A 8 Table A 9 Connector Pin Assignments CN10 eee A 8 Table A 10 Connector Pin Assignments CN11 2 222 aaa A 8 Table A 11 Connector Pin Assignments CN12 22 2 a A 8 Table A 12 Connector Pin Assignments CN13 a A 9 Table A 13 Connector Pin Assignments CN14 2 0 a A 9 Table A 14 Connector Pin Assignments CN15 22 a A 9 LQ 2170 Service Manual Appendix A 1 EXPANDED PRODUCTION COMMANDS 1 Write Bidirectional Adjustment Data to EEPROM e Format IB 7C 00 06 00 00 FF 00 in hex dl d2 d3 e Parameters dl Print speed 0 High speed draft Draft 1 Draft copy 2 LQ d2 d3 Bi d adjustment data to be written units 1 720 inch n FFF4H 212 12 720 inch to the right n FFFFH 21 2 720 inch to the right n FFFEH 22 1 720 inch to the right n 0000H 0 n 0001H 1 1 720 inch to the left n 0002H 2 2 720 inch to the left n 000CH 12 12 720 inch to the left e Range dl 0 1 or 2 d2 d3 12 lt n lt 12 n d2 d3 x 256 2 Print Data for Selected EEPROM Address e
78. ck or labels 3 In shipment container 1 2 8 Reliability Table 1 23 gives maximum life and usage specifications Table 1 23 Reliability Statistics Total print volume 7 5 million lines except printhead MTBF 6000 power on hours POH Printhead life 400 million strokes wire Ribbon life 8 million characters 1 2 9 Safety Approvals Table 1 24 provides information about the safety approvals the printer has met Table 1 24 Safety Information for Printer Models Safety Standards UL1950 with D3 EN60950 TUV SEMKO CSA C22 2 No 950 with D3 DEMKO NEMKO FIMKO EMI FCC part 15 subpart B class B EN55022 CISPR pub 22 CSA C108 8 class B Rev A 1 17 Product Description LQ 2170 Service Manual 1 2 10 CE Marking The following table lists CE marking information Table 1 25 CE Marking Low Voltage Directive 73 23 EEC EN60950 EMC Directive 89 336 EEC EN55022 class B EN50082 1 IEC801 2 1EC801 3 IEC801 4 Non Automatic Weighing Instruments Directive 90 384 EEC EN45501 1 2 11 Physical Specifications Table 1 26 provides printer dimensions and weight Table 1 26 Physical Specifications Dimensions 639 mm W x 410 mm D x 257 mm H 25 16 W x 16 14 D x 10 12 H Weight Approx 13 kg 28 66 Ib 1 2 12 Cut Sheet Feeder Specifications This printer has two CSF options a high capacity CSF and a 2nd bin CSF The high capacity CSF has special a paper feed mot
79. cket Failure to do so can cause physical injury The power switch is wired in the secondary circuitry Therefore the printer s primary circuitry remains live even after the power switch is turned off Never touch primary parts of the the power supply unit including the heat sink while the power supply cable is connected to the AC power socket 07 184 WLO To maintain efficient printer operation e Use only recommended tools for maintenance work e Use only recommended lubricants and adhesives see Chapter 6 e Adjust the printer only in the manner described in this manual 3 1 2 Tools Tables 3 1 and 3 2 list the tools recommended for disassembling assembling or adjusting the printer Use only tools that meet these specifications Table 3 1 Recommended Tools Round nose pliers B740400100 Nippers B740500100 Tweezers B741000100 Soldering iron B740200100 E ring holder 2 5 B740800400 Phillips screwdriver No 2 B743800200 Standard screwdriver B743000100 Thickness gauge B776702201 Note All tools are commercially available Table 3 2 Equipment Required for Maintenance Description Specification Multimeter Oscilloscope 50 MHz Note An oscilloscope is required only for servicers who repair to the component level Rev A 3 1 Disassembly and Assembly LQ 2170 Service Manual 3 1 3 Service Checks After Repair Before returning the printer after service use
80. ction 3 2 7 Disconnect the following connectors from the C165 MAIN board assembly CN3 12 pin blue CMA 3 pin white CNS 3 pin black CN6 2 pin white CN7 4 pin white FFC CN8 18 pin white FFC CN9 16 pin white FFC CN10 4 pin blue CNII 5 pin blue CN12 4 pin white CN13 2 pin black CN15 22 pin FFC K Disconnect the cables for CN10 and CNI1 after releasing the connector lock X Disconnect the cable for CN3 by pushing down the connector lock w Remove the 2 CBS screws 3 x 12 F Zn securing the upper connector cover Remove 5 CBB screws 3 x 12 F Zn and 1 CBC lamitate screw 3 x 8 F Zn securing the C165 MAIN board assembly to the lower housing assembly Remove the option I F cage from the C165 MAIN board by releasing the hooks which is fixing it to the C165 MAIN board C 166 MAIN Baord Assembly p Figure 3 36 Removing the C165 MAIN Baord Assembly 7 Remove the C165 MAIN board assembly ssembly Notes Notice the location of the CBC lamitite screw 3 x 8 F Zn Refer to the above figure Lock CN10 and CNI1 by pushing down each connector s lock after inserting the connector cable The tightening torque for the CBB 3 x 12 F Zn screw 0 78 0 98 Nm 8 10 Kg f cm The tightening torque for CBB 3 x 8 F Zn screw 0 78 0 98 Nm 8 10 Kg f cm If you replace the main board adjust the bidirectional print alignment and run the default setting program Refer to Cha
81. ction circuit operates this protection can only be removed by turning the power off and on again 6 5 V Line Over Current Protect Circuit 5 V line over current control circuit is shown below L51 Q51 R53 35V Line o 45y Line IC51 TLA9ACN o GND Figure 2 28 5 V Line Over Current Protection Circuit Port 2 of IC51 TL494CN monitors the 5 V line and this protection circuit operates when the 5 V line goes below 4 75 V When this circuit operates port 8 signal output of the PWM pulse stops and Q51 stops its switching operation Consequently the 5 V line stops generating 2 20 Rev A LQ 2170 Service Manual Operating Principles 7 5 V Line Constant Voltage Control Circuit The 5 V line constant voltage control circuit is shown below 35V o 5v Line o GND 1051 TLA9ACN Figure 2 29 5 V Line Constant Voltage Control Circuit Port 16 of IC51 TL494CN monitors the 5 V line and the voltage is compared with the standard voltage which is input into port 15 When the voltage of port 16 goes below 4 81 V or above 5 17 V the pulse width of the PWM signal which is output from port 8 changes and the 5 V line is kept between 4 81 V to 5 17 V Rev A 2 21 Operating Principles LQ 2170 Service Manual 2 3 CONTROL CIRCUIT The control circuit consists of the C165 MAIN board assembly and C165 PNL board This section describes the major components and explains how the boards work 2 3 1 Overvi
82. d 1 26 Rev A LQ 2170 Service Manual e Printer status Product Description The rear PE sensor detects that paper is loaded in the rear paper path Release lever position is set to Friction Table 1 38 Paper Handling Sequence 5 Occurrence Result Pause button pressed Printer goes on or off line LF FF button pressed Printer performs a line feed LF FF button held down continuously Printer ejects paper forward after the line feed except with roll paper The printer performs a form feed after the line feed roll paper LF FF button pressed and paper is advanced over the logical paper length Paper is ejected forward except with roll paper The printer performs a form feed roll paper Load Eject button pressed Paper is ejected forward except with roll paper The printer performs a form feed roll paper Micro Adjust T button pressed The printer micro feeds paper forward Micro Adjust 4 button pressed The printer micro feeds paper backward Release lever set to the tractor position The beeper sounds Front paper end sensor detects that paper was loaded in the rear paper path The beeper sounds e Printer status Front PE sensor detects that paper is loaded in the rear paper path The release lever position is set to Friction Table 1 39 Paper Handling Sequence 6 Trigger Result Pause button pressed
83. d Print Alignment Settings Diskette 1 or Remote Utility or Panel Operation Factory Settings 2 Settings Diskette TPE Level Reset Settings Diskette X 1 The Settings Diskette contains 3 settings programs the bidirectional adjustment program factory settings program and TPE top paper end level rewrite The diskette also includes 4 check programs continuous form paper A3 cut sheets A4 cut sheets and envelopes X 2 This factory settings program includes several factory setting items Using this program sets the printer to the destination factory settings Rev A 4 1 Adjustment LQ 2170 Service Manual 4 2 ADJUSTING AND RESETTING THE PRINTER 4 2 1 Platen Gap Adjustment If you have rotated or reassembled the rear CR guide shaft or parallelism adjustment bushing or if printing is light or dark even at the proper PG lever position perform this adjustment at 3 positions the 5th 80th and 130th columns 1 Remove the printhead from the CR assembly see Section 3 2 3 2 Remove the ribbon mask from the ribbon mask holder using tweezers as shown in the figure Ribbon Mask Ribbon Mask Holder Figure 4 1 Removing the Ribbon Mask Attach the printhead to the CR assembly again tightening the 2 CBS screws 3 x 10 F Zn Move the printhead to 5th column position Set the release lever to the FRICTION position Nn pp Set the PG adjust lever to the second slot from rear of the printer mechanism
84. d back to the TOF position when any new print data is sent to the printer The tear off position is saved in the EEPROM and if the printer is turned off the setting is not cleared Conditions required for the adjustment Auto tear off function O Auto tear off has been set to ON in default setting mode O The release lever has been set to Tractor O The data buffer is empty and the printer is on line O More than 3 seconds have passed after the host computer finished transferring print data MZ Manual tear off function O Auto tear off has been set to OFF in default setting mode O The release lever has been set to Tractor O The data buffer is empty and the printer is on line or the printer is off line O The Tear Off button was pressed under all the conditions listed above Paper handling with the tear off position O Pressing the Pause button with the printer off line feeds the paper back to the TOF position for the next page and brings the printer back on line O Pressing the Pause button with the printer on line feeds the paper back to the TOF position for the next page and takes the printer off line O Pressing the LF FF button feeds the paper back to the TOF position for the next page and executes a line feed O Pressing the Load Eject button feeds the paper back to the TOF position for the next page and ejects paper backward O Pressing the Pause button more than 3 seconds puts the printer in micro adjust m
85. e shaft and left frame Remove 4 CBS screws 3 x 6 F Zn securing the left frame assembly Platen Cover C B S Screw 3 X 6 FZ n YA Hexagon Nut Normal M4 77 7 gt CBS Screw 3 X 6 FZ n Securing the Left Frame Assembly Figure 3 25 Removing the Left Frame Assembly 6 Disconnect 2 connector cables from the 2 release lever sensors and then disconnect the connector cable from the HP sensor 7 Remove the left frame assembly ssembly Notes Notice the connection of the release lever sensor cables The white conector s cable should be connected to the SWI sensor as shown in the following figure The tightening torque for the CBS screw 3 x 6 F Zn 0 78 0 98 Nm 8 10 Kg f cm The tightening torque for the hexagon nut standard M4 1 18 1 37 Nm 12 14 Kg f cm Adjust the platen gap and bidirectional print alignment Refer to Chapter 4 Left Frame Assembly Release SW1 a Release SW2 White connector Black Connector Figure 3 26 Cable Connections for the Release Lever Sensors Rev A 3 19 Disassembly and Assembly LQ 2170 Service Manual 3 2 10 6 Removing the Ribbon Drive RD Assembly 1 Remove the rear front edge guide assembly front cover paper eject assembly rear front tractor unit and printer cover see Section 3 2 1 Remove the panel board see Section 3 2 2 and upper housing assemblies see Section 3 2 7 Remove the
86. ect Micro feeds forward when that function is enabled Line feed when pressed briefly LF F Form feeds when held down for a few seconds Micro feeds backward when that function is enabled Advances continuous paper to the tear off position Selects CSF bin 1 2 or card mode Selects font Selects pitch Rev A 1 29 Product Description LQ 2170 Service Manual Operations at power on Turning the printer on while pressing panel buttons executes the functions below Table 1 42 Operation at Power On Load Eject LQ self test LF f FF Draft self test Load Eject and LF FF Hexadecimal data dump Pitch Default setting Font and Tear Off Bin Clear EEPROM Pause Bi d adjustment Others Not available Operation in default setting mode The buttons used in default setting mode are as follows Table 1 43 Operation at Default Setting Mode Pitch Selects the menu Tear Off Bin Changes the setting Others Not available 1 4 2 Status Codes Indicated by the LEDs and Beeper Table 1 44 Indicators and Beeper Paper Out Bakod Pause Paper Out Paper Jam Head Hot Blinks Cover Open On Micro Adjust Blinks Tear Off Bin Selection Pitch Selection Font Selection Fatal Error Blinks Blinks Blinks Blinks Blinks O indicates the beeper sounds for 100 ms with an interval of 100 ms indicates the beepe
87. egory Requirement Type 4 phase 200 pole HB type pulse motor Drive Voltage 35 2 1 VDC Coil Resistance 2 7Q 10 per phase at 25 C 77 F Inductance 3 7 uH 20 per phase at 1K Hz 1 V rms Figure 2 2 Carriage Movement Mechanism 2 2 Rev A LQ 2170 Service Manual Operating Principles 2 1 3 Platen Gap Adjustment You can adjust the platen gap the gap between the platen and printhead to allow the printer to use paper of different weights or thicknesses When you move the platen gap adjust lever forward or backward the carriage guide shaft rotates This rotation moves the carriage either toward or away from the platen and changes the platen gap This adjustment function has nine ranges for the adjustment and the adjustment position is detected by platen gap PG switches Figure 2 3 Platen Gap Adjustment Lever Moving the platen gap adjust lever beyond position 2 changes the print speed mode to Copy mode and the speed slows down to about 24 normal to protect the printhead The following table show you the relationship between the platen gap and the print speed Table 2 2 Platen Gap and Print Speed Paper Type e is di reli er PG SW Print Speed Single Sheet 0 065 0 Closed Normal 0 1 0 Closed Normal 0 14 1 Closed Normal Continuous 0 065 0 Closed Normal Paper Single Sheet 0 09 0 Closed Normal Continuous 0 18 1 Closed Normal Paper M
88. es LQ 2170 Service Manual 2 3 2 System Reset Circuit Control circuits ICI and IC2 are initialized when a RESET signal LOW level is output from port 1 VOUT of IC10 IC10 monitors the 5 V line on port 3 and resets under the following conditions IC2 E05813YA 5V A RESET 61 R47 ik IC1 TPM96C041AF IC10 PST5920 VOUT 1 MRES 2 VCC 3 GND 4 ____________ 23 RESET 1 616 01U m7 PIF Figure 2 32 Reset Circuit 1 When the power supply is turned on a RESET signal is output RESET is canceled when the 5 V line goes up to 4 2 V and then 100 ms passes 2 When the 5 V line goes below 4 2 V a RESET signal is output RESET is canceled when the 5 V line goes back up to 4 2 V and then 100 ms passes v 1 l RESET as VOUT RESET VCC 5V line Power On Figure 2 33 Reset Signal Output Timing 2 3 3 Printhead Driver Circuit Print Head 435V 485V HTMP T C9 Printhead Drive Transistor Q5 Q13 Q14 22 R49 Fae FA Era bind Si TA 69 70 30 31 86 TIT yv R50 Gate ae ong 35V Array GTA R51 35V Figure 2 34 Printhead Drive Circuit The standard voltage for the A D converter is made in ZD1 and input to CPU port 78 Based on this standard voltage the A D converter in the CPU operates Port 74 monitors the 35 V line between R50 and
89. eserved Reserved 24H 25H Tear Off 128 to 127 in units of 1 360 inch adjustment 26H Other font 0 Roman T 1 Sans Serif H 2 OCR B selection 3 Orator 4 Orator S 5 Script C 27H Backup flags 1 Copy mode Backup flags 2 Friction Bin 1 or Tractor not Tear Off In tear off state Friction Bin 1 Bin select Friction Bin 2 Friction Card Stock Tractor and Tear off Panel mask LOAD function pattern 1 EJECT function FONT selection PITCH selection TEAR OFF function BIN selection Draft self test LQ self test Panel mask LF function pattern 2 FF function MICRO ADJUST function PAUSE function Data dump Default setting Bi d adjustment Reserved Assignment of data for two or more bytes is sequential from lower byte to lower address and from higher byte to higher address Rev A A 3 Appendix Address 2BH Manual feed wait time LQ 2170 Service Manual Data Format 3 to 30 in units of 0 1 sec OOH 0 3 sec same as default Default 03H 0 3 sec 2CH 1 Tear off wait time 3 to 30 in units of 0 1 sec OOH 0 3 sec same as default 03H 0 3 sec 2DH 2EH Reserved 00H 2FH 33H Reserved 00H 34H 53H Reserved 00H 54H 5DH Reserved 00H 5EH 5FH Paper edge length 00H 60H 61H Paper length for rear manual insertion 1 to 22 x 360 in un
90. ession Spring 200g Plan Washer a B aS Spur Gear 27mm Spur Gear 34mm Figure 3 22 Engaging Gears 1 Rev A Disassembly and Assembly LQ 2170 Service Manual ssembly Notes When you engage the release lever and release lever transmission to the tractor clutch cam notice the points in the following figure The tightening torque for the CBS screws 3 x 6 F Zn and 3 x 8 F Zn 0 78 0 98 N m 8 10 Kg cm The tightening torque for the hexagon nut standard M4 1 18 137 N m 12 14 Kg f cm Notice how the intermittent gear release lever and release lever transmission are engaged __ Lever Release Lever Release Transmission Intermittent Gear Figure 3 23 Engaging Gears 2 Pay attention to how the tractor clutch cam is engaged Refer to the following figure Tractor Clutch Cam Figure 3 24 Engaging the Tractor Clutch Cam 3 18 Rev A LQ 2170 Service Manual Disassembly and Assembly 3 2 10 5 Removing the Left Frame Assembly 1 Remove the rear front edge guide assembly front cover paper eject assembly rear front tractor unit and printer cover see Section 3 2 1 2 Remove the panel board assembly see Section 3 2 2 upper housing assembly see Section 3 2 7 and then remove the printer mechanism see Section 3 2 10 Remove 2 CBS screws 3 x 6 F Zn securing the platen cover 4 Remove the hexagon nut standard M4 securing the front CR guid
91. ew of Control Circuit Operation The printer s control circuit includes a TMP96C141AF CPU that runs at 17 20 MHz an EOSB13YA gate array a 1M bit PS RAM 8 bit bus less than 80ns a 2M bit PROM 8 bit bus less than 120ns 4M CG Standard Version or 8M CG NLSP Version It oversees control of all the components in the printer The following chart shows you a block diagram of the control circuit Q5 Q22 Head Temp Head Drv Detector Type B I F IC 3 ROM IC 5 RAM 35V Voltage Detector PE Rear Detector we IC a Gate Array IC 1 E05B13 CPU Power SW TMP96C041AF PE Front Detector P Width Detector Home Detector Release Lever Detector Gap Lever Detector CR Drv PF Drv CSF SLA7024M UDN2917EB CSF Drv Detector NAA Data Bus Address Bus Figure 2 30 Control Circuit Block Diagram 2 22 Rev A LQ 2170 Service Manual Operating Principles The following figure shows the data flow from the host computer to the printhead Data sent from the host computer is converted to image data and transmitted to the printhead through the gate array CPU TMP96C041 AF Paa aya KA a aaa a EEE EEE oI Ba Print data conversion 1 gt ae re eee Line Edit eee Buller Print data conversion 2 Option I F Parallel I F Host Computer Gate Array E05B13
92. f the PW sensor Remove the ribbon mask holder assembly and remove any foreign objects The PW sensor is defective Check the operation of the PW sensor Refer to page 5 2 Replace the PW sensor Refer to page 3 9 When the printer is powered on paper is ejected automatically and then the printer signals a paper end error A foreign object is jammed between the platen and rear front PE sensor Remove the platen and check the paper path Refer to page 3 10 Remove the platen and remove any foreign object Refer to page 3 10 CN5 or CN6 is disconnected Check the connectors Connect the connector properly The rear front PE sensor is defective Check the operation of the rear front PE sensor Refer to page 5 2 Replace the rear front PE sensor Refer to page 3 23 Rev A When paper is loaded it is ejected automatically The FFC CN7 for the PW sensor is disconnected Check the connector Connect the FFC properly The FFC is broken Check the continuity of the FFC using a multimeter Replace the FFC The PW sensor is defective Check the operation of the PW sensor Refer to page 5 2 Replace the PW sensor Refer to page 3 9 5 17 Troubleshooting Problem Paper feed is abnormal LQ 2170 Service Manual Table 5 8 Repairing the Printer Mechanism Symptom Cut sheet
93. g position When narrow continuous paper fewer than 30 columns is loaded the printer changes the centering position to the proper position based on the measured paper width 1 28 Rev A LQ 2170 Service Manual Product Description 1 4 Operating Instructions This section provides detailed information about the LQ 2170 control panel buttons and LEDs 1 4 1 Control Panel Operations The printer control panel contains 6 non lock type push buttons and 10 LEDs for various printer functions The exterior view of the control panel is shown in the following figure Tear Off Bin Paper Out Operate Micro Adjust k 3sec LF FF Load Eject Font Pitch Tear Off Bin ee 5 m a ia pi Tear Off LED Off ra Roman m 15cpi F oh a E LED On Sans Serif E E 17 cpi Card LED Blinks Em 1 20 cpi E PS Figure 1 9 Control Panel Operation in normal mode In normal mode pressing panel buttons executes following functions Buttons and Switches Operation Turns the printer on and off Table 1 41 Operation in Normal Mode Alternates printing and non printing states gues Enables the micro adjust function when held down for 3 seconds Loads or ejects paper Load Ej
94. ght Sub Frame 0002 00 o 3 16 Figure 3 22 Engaging Gear a aaa nae cee RE aa 3 17 Figure 3 23 Engaging Gears 2 ope tare ce be bien de ls napa 3 18 Figure 3 24 Engaging the Tractor Clutch Cam 20000000 3 18 Figure 3 25 Removing the Left Frame Assembly 05 3 19 Figure 3 26 Cable Connection for the Release Lever Sensors 3 19 Figure 3 27 Removing the RD Assembly 000 c eee ee eee 3 20 Figure 3 28 Engaging Gears for the RD Assembly 3 20 Figure 3 29 Disconnecting the FFC cee eee eee 3 21 Figure 3 30 Removing the CR Assembly 0 0200 eee ee 3 21 Figure 3 31 Inserting the Timing Belt ooooooomooooo 3 22 Figure 3 32 Inserting the Oil Pad into the CR Assembly 3 22 Figure 3 33 Assembling the Rear CR Guide Shaft 3 22 Figure 3 34 Removing the Rear PE Sensor Assembly 3 23 Figure 3 35 Removing the Front PE Sensor Assembly 3 23 Figure 3 36 Removing the C165 MAIN Board Assembly 3 24 Figure 3 37 Removing the C165 PSB E Board Assembly 3 25 Figure 3 38 Direction for Mounting the Fan Motor 0 3 25 Figure 3 39 Releasing the Clips for the Right CSF Cover 3 26 Figure 3 40 Cable Alignment nnna anaana a EE A ee ee gee 3 27 Figure 3 41 Engaging 13 Gears 0 0
95. he printer bit 0 LSB DATA2 bit 1 DATA3 bit 2 DATA4 bit 3 DATA5 bit 4 DATA6 bit 5 DATA7 bit 6 A nN on B W NN DATA8 bit 7 MSB PtrCik Printer clock signal PtrBusy Printer busy signal and reverse channel transfer of data DataBit 3 7 bits 3 or 7 jua jua AckDataReq Acknowledge data request signal and reverse channel DataBit 2 6 transfer of data bits 2 or 6 Xflag X flag signal and reverse channel transfer of data bits 1 DataBit 1 5 or5 HostBusy Host busy signal INIT Not used DataAvail Data available signal and reverse channel transfer of DataBit 0 4 data bits 0 or 4 1284 Active 1284 active signal Logic H This line is pulled up to 5 V through 3 3K Q resistor 5 V This line is pulled up to 5 V through 3 3K Q resistor Chassis Chassis GND GND Signal GND NC Not connected Rev A 1 23 Product Description LQ 2170 Service Manual e Extensibility request The printer responds to the extensibility request in the affirmative when the request is 00 H or 04 H which means 00H Request nibble mode of reverse channel transfer 04H Request device ID in nibble mode of reverse channel transfer e Device ID Refer to the following descriptions ESC P2 00 H 32 H MFG EPSON CMD ESCPL2 00 MDL LQ 2170 CLS PRINTER IBM 2391 Plus 00 H 33 H MGF EPSON CMD PRPXL24 01 MDL LQ 2170 C
96. ice Manual Disassembly and Assembly 3 2 3 Removing the Printhead 1 Remove the printer cover and ribbon cartridge see Section 3 2 1 Remove 2 CBS screws 3 x 10 F Zn securing the printhead to the CR assembly Remove the printhead from the CR assembly E PAN Disconnect 2 wide FFCs from the printhead and then disconnect the narrow FFC from the connector on the CR cover o TC BSScrews 3X10F Zn tu Printhead Figure 3 6 Removing the Printhead Assembly Notes The FFC must be connected properly as shown in the following figure The tightening torque for the 2 CBS screws 3 x 10 F Zn 0 59 0 78 Nm 6 8 Kg f cm Adjust the platen gap Refer to Chapter 4 CPS Print Head FFCs for Printhead N Direction that Explosed Terminals Face Figure 3 7 Method for Connecting the Printhead FFC Rev A 3 7 Disassembly and Assembly LQ 2170 Service Manual 3 2 4 Removing the HP Sensor 1 Remove the printer cover ribbon cartridge front edge guide and front cover see Section 3 2 1 2 Disconnect the connector cable for the HP sensor 3 Remove the HP sensor by pushing up and releasing the 2 clips at the bottom of the HP sensor from the front paper entrance 2 Clips for HP Sensor Figure 3 8 Removing the HP Sensor Assembly Note Notice the direction for mounting the HP sensor Refer to the figure above 3 2 5 Removing the PW Sensor Assembly 1 Remove the printer c
97. ing on envelopes is available only at normal temperatures and humidity Insert envelopes from the rear entrance only x Y Insert the longer side of the envelope horizontally Table 1 12 Specifications for Card Stock Front Entry Rear Entry Minimum Width 105 mm 4 13 Maximum 148 mm 5 83 Minimum 105 mm 4 13 Maximum 148 mm 5 83 Length 148 mm 5 83 148 mm 5 83 105 mm 4 13 148 mm 5 83 Thickness 0 22 mm 0 0087 0 22 mm 0 0087 192 g m 51 Ib Weight 192 g m 51 lb Quality Plain paper recycled paper Not curled folded or crumpled Plain paper recycled paper Not curled folded or crumpled 7 3k Printing on card stock is available only at normal temperatures and humidity NZA 3k When the longer side of an A6 card is to be inserted horizontally insert it from the rear entrance 1 10 Rev A LQ 2170 Service Manual Product Description The figure below shows the printable area for envelopes and card stock Printable area Each abbreviation is defined in the following table Table 1 13 Printable Area for Envelopes and Card Stock Abbreviations Envelopes Card Stock PW width Refer to Table 1 11 Refer to Table 1 12 PL length Refer to Table 1 11 Refer to Table 1 12 LM left margin 3 mm 0 12 or more 3 mm 0 12 or more 3 mm 0 12 or more 3 mm 0 12 or more RM right margin TM
98. inter is powered on paper is ejected Flowchart 2 1 automatically When paper is loaded it is ejected automatically and then the printer indicates Ready Abnormal Paper Feed e Control panel indicator LEDs do not light Flowchart 3 e Operate bution does not work e Panel buttons do not operate Abnormal Control Panel Operation e No image is printed Flowchart 4 Ab 1 Printi normat 2 s Faulty printing some dots are not printing 5 4 Rev A LQ 2170 Service Manual 1 Abnormal CR Operation Rev A Troubleshooting 5 5 LQ 2170 Service Manual Troubleshooting 2 Abnormal Paper Feed Operation 1 START When the printer is NO ls CN11 NO Connect powered on does bp connected gt CN11 the CR motor correctly correctly rotate ii YES YES Check the resistance Is the of the motor coils problem gt a Does See Tabla corrected the CR motor NO stop during or after initialization YES NO YES Replace the Replace X C166 MAIN the CR board motor you move the CR manually with the NO power off does it move freely Is the a YES NO adjusted gt Adjust the gap properly properly Refer to Chapter 4 Is the pr
99. into Bi D adjustment mode The printer prints out a guide sheet containing 25 patterns in Super Draft mode Look for the pattern most closely aligned on the sheet To adjust your printer follow these steps 1 Look for the alignment pattern that is most closely alignment and press the Pitch button until the lights indicate the appropriate pattern number as shown below 2 Press the Font switch to resister your selection The printer prints additional pages that display alignment patterns 3 When you have made your last selection sheet LQ turn the printer off Pattern number Pitch LEDs 1 nnn 14 nog E E EHH HE 4 nm 17 E F 7 20 ae E 8 a 21 mt 9 i 22 m E 10 nn 23 Zo om o 13 Super Draft GG naa HA AA AA AA AA mo PEEPI TTT PTY Figure 4 10 Guide Sheet for Bi d Adjustment Press the PITCH button until the lights match those for the best aligned pattern on the guide sheet Press the FONT button to save your selection The printer then prints 25 patterns in Draft print mode on the additional pages Return to step 3 of this procedure to adjust the bidirectional alignment in Draft mode After you perform steps 3 to 3 above for Draft mode go back to step 3 to adjust NLQ mode When you have made your last selection in
100. ircuitry It is shown in the illustration below 35V Line D85 PSC line Pe ee ee ert Operation SW Orr Power SW Figure 2 23 Power Switch Circuit When printer power is off the PSC line is connected to a ground line and the current is loaded from C55 to PC1 Consequently Q32 and Q31 are turned on and the switching FET is shut off 2 35 V 5 VDC Line Over Voltage Protection Circuit This circuit is shown below 35V Line Q31 FET 5V Line Figure 2 24 Over Voltage Protection Circuit The 35 VDC over voltage protection circuit operates when voltage exceeds 42 42 V between ZD52 and ZD87 and shuts off the switching FET Q1 K1692 or K1531 The 5 VDC over voltage protection circuit operates when voltage exceeds 7 5 V between ZD53 and shuts off the switching FET Q1 K1692 or K1531 When either of these protection circuits operate the protection cannot be removed without turning power off and on again 2 18 Rev A LQ 2170 Service Manual Operating Principles 3 35 V Constant Voltage Control Circuit The 35 V constant voltage control circuit is illustrated below Figure 2 25 35 V Line Constant Voltage Control Circuit The constant voltage control circuit operates to keep the 35 V line at 35 V 6 Yo When the voltage between ZD51 and ZD85 becomes 32 7 V 2 75 Yo PC1 turns on and then Q2 also turns on Consequently switching FET QI shuts off When the voltage between ZD51 and ZD85 becomes less
101. ired Adjustment Tools 0 0 00 cee ee 4 1 4 2 ADJUSTING AND RESETTING THE PRINTER 4 2 4 2 1 Platen Gap Adjustment criar la o eet bA eed KE 4 2 4 2 2 Bidirectional Print Alignment Adjustment a 4 4 4 2 2 1 Bi d Print Alignment Adjustment on the Settings Diskette 4 4 4 2 2 2 Bi d Print Alignment Adjustment on the Control Panel 4 6 42 3 Factor Selling pasada dato eee et a RAM eke 4 7 42 4 TPELEVELHESE hn sr abd eee e 4 8 List of Figures Figure 4 1 Removing the Ribbon Mask 000 eee eee 4 2 Figure 4 2 Setting Position for PG Adjust Lever ooo ooooooooo 4 2 Figure 4 3 Platen Gabi epoca 08 rs iba o b ANG LIP LAG 4 3 Figure 4 4 Adjusting the Parallelism of the CR Guide Shaft 4 3 Figure 4 5 Machine Select Menu cee eee eee ees 4 4 Figure 4 6 Setting File MENU caca tapa wend dene pose oe odo 4 4 Figure 4 7 Main MENU 22 ieu sete rada eee ee eee daa 4 4 Figure 4 8 Bidirectional Adjustment Menu eee eee eee 4 5 Figure 4 9 Current Bi d Print Alignment 002 2 00 4 5 Figure 4 10 Guide Sheet for Bi d Adjustment a 4 6 Figure 4 11 Machine Select Menu 2 2 0000 eee eee 4 7 Figure 4 12 Setting File Menu su ius sb od bate ee eae ee oe wae Ee es 4 7 Figure 4 13 Main Menu escasa NANA KB iaa 4 7 Figure 4 14 Machine Select Menu o o ococccoccccc eee ees 4 8 Figure 4 15 Setting File Menu a uk Morea ghee
102. its of 1 360 inch OOOOH 22 inches same as default 1EFOH 22 62H 63H Paper length for front manual insertion 1 to 22 x 360 in units of 1 360 inch OOOOH 22 inches same as default 1EFOH 22 64H to 66H Sub number for customization 00H to 09H 000000H Standard 67H Reserved 00H Area 2 68H Market 0 Standard version 1 NLSP version 69H to 70H Reserved 71H Checksum of Area 2 68 70H Area 3 72H Vp adjustment value 73H Vp adjustment value complement of 72H Bi d adjustment value for high speed draft draft mode 12 to 12 in units of 1 720 inch Bi d adjustment value for draft copy mode 12 to 12 in units of 1 720 inch 76H Bi d adjustment value for LA mode 12 to 12 in units of 1 720 inch 77H Reserved 78H TPE level 79H TPE adjustment position 10 to 10 in units of 1 180 inch 7AH to 7EH Reserved Reserved EEPROM data in Area 3 is set for each printer in the factory Do not change this data afterwards A 4 Rev A LQ 2170 Service Manual Appendix A 3 CONNECTOR SUMMARY Figure A 1 illustrates how primary components are connected Table A 1 summarizes functions and sizes of the connectors Printer Mechanism PF Motor CR Motor PG Sensor Board Assy C166 Release Lever Position Sensor PSB PSE PE Rear
103. lears the buffer of all data Cancels download character definition O O Puts the printer in standby state if no errors occur O Executes software initialization 1 5 3 Power On Initialization This initialization is activated by power on or by a cold reset command remote R command This initialization O Initializes the printer mechanism O Executes operation initialization 1 34 Rev A LQ 2170 Service Manual Product Description 1 6 MAIN COMPONENTS The main components of the LQ 2170 are designed for easy removal and repair main components are O C165 MAIN Board Assembly O C165 PSB PSE Board Assembly 120 V 230 V O C165 PNL Board Assembly O Printer Mechanism O Housing Assembly The following figure shows the main components of the LQ 2170 The Figure 1 12 Main Components Rev A 1 35 Product Description LQ 2170 Service Manual 1 6 1 C165 MAIN Board Assembly The C165 MAIN board consists of a TMP96C141AF CPU an E05B13 gate array a program CG ROM a PS RAM an EEPROM etc 1C11 PF Motor Driver IC3 P ROM IC 5 PS RAM UDN2917EB
104. llers and the rollers for the lower paper guide Closed Closed are separated from each position Bae Open j A a V gt O Closed o J AN NOS Release SW1 Figure 2 4 Release Switch 2 4 Rev A LQ 2170 Service Manual Operating Principles 2 1 4 2 Paper Advance Mechanism This section describes how the friction and tractor advance mechanisms work to move the paper through the printer 1 Friction Advance Method Paper is held between the platen and the paper guide rollers and between the paper tension roller and paper tension unit cover The paper feed PF motor pinion gear turns in the direction of the black arrow driving the paper advance reduction gear The paper advance reduction gear turns the platen gear and paper tension roller gear Paper advances in the direction of the white arrow Figure 2 5 shows the friction advance method when paper is fed through the top paper entrance In the friction advance method the paper guide roller spring holds the paper against the platen Paper can be released by setting the release lever to the tractor feed position MM Q Figure 2 5 Friction Advance Operation Using the Top Entrance Rev A 2 5 Operating Principles LQ 2170 Service Manual 2 Push Tractor Method The push tractor method is used with the rear or front entrance When the push tractor method is used with the rear entrance the torque generated by the PF motor is transmitted to the push tract
105. mbly Notes Notice the connection for cables CN10 and CN11 and align the red colored cable to pin 1 of the connector The tightening torque for the printer mechanism mounting screw 0 98 Nm 1 18 Nm 10 12 Kg cm Adjust the bidirectional print alignment and reset the TPE level Refer to Chapter 4 Rev A 3 13 Disassembly and Assembly LQ 2170 Service Manual 3 2 10 1 Removing the PF Motor 1 ONS QUE N NO Remove the rear front edge guide assembly front cover paper eject assembly rear front tractor unit and printer cover see Section 3 2 1 Remove the panel board see Section 3 2 2 and upper housing assemblies see Section 3 2 7 Remove the printer mechanism see Section 3 2 10 Remove the CBS screw 3 x 6 F Zn and CB screw 3 x 8 F Zn securing the PF motor Disconnect connector CN10 from the C165 MAIN board assembly Remove the PF motor from the right sub frame CBS Sais 3 x 6 F Zn Figure 3 18 Removing the PF Motor Assembly Note Before attaching the PF motor to the proper position on the right sub frame set the release lever to the full release position The CB screw 3 x 8 FZ n is used to secure the upper part of the PF motor The CBS screw 3 x 6 FZ n is used to secure the lower part of the PF motor The tightening torque for the CB and CBS screws 3 x 8 F Zn 0 78 0 98 Nm 8 10 Kg cm 3 14 Rev A LQ 2170 Service Manual Disassembly and Assembly
106. ment remove the screwdriver from the rear CR guide shaft After inserting the ribbon mask in the ribbon mask holder and installing the printhead into CR assembly tighten the 2 CBS screws 3 x 8 F Zn to attach the printhead Tighten the hexagon nut standard M4 securing the PG adjust lever Rev A 4 3 Adjustment LQ 2170 Service Manual 4 2 2 Bidirectional Print Alignment Adjustment This section describes the procedure for adjusting the bidirectional print alignment required after mechanism repair This procedure is also necessary if you replace the main board assembly or EEPROM because the adjusted value is written to the EEPROM on the C165 MAIN board You can perform the adjustment from the Settings Diskette using the control panel or with a remote utility This section describes the adjustment procedure with the Settings Diskette first and then describes the adjustment procedure using the control panel Notes When the main board is replaced reset the Factory Settings first then perform the bidirectional adjustment e Do not perform the Bi d adjustment if the input voltage is fluctuating heavily 4 2 2 1 Bi d Print Alignment Adjustment using the Settings Diskette 1 Insert the Settings Diskette into Drive A of the PC and the power on 2 Type GWBASIC and press ENTER 3 Load and run the J10A00E program First the program displays Machine Select Menu Program J10A00E Setting DEFSTD 9 pins VRO 0 VR1 0 VR2 0
107. nce Operation Using the Top Entrance Push Tractor Operation Using the Rear Paper Entrance Push Tractor Operation Using the Front Paper Entrance Pull Tractor Operation Using the Bottom Paper Entrance Push Pull Tractor Operation Using the Rear Paper Entrance Figure 2 10 Push Pull Tractor Operation Using the Front Paper Entrance Figure 2 11 Paper Path and Detector PE Sensor Location Figure 2 12 Friction Feeding Using the Top Entrance Figure 2 13 Push Tractor Feeding Using the Rear Entrance Figure 2 14 Pull Tractor Feeding Using the Rear Entrance Figure 2 15 Push Pull Tractor Feeding Using the Rear Entrance Figure 2 16 Pull Tractor Feeding Using the Bottom Entrance Figure 2 17 Friction Feeding Using the Front Entrance Figure 2 18 Push Tractor Feeding Using the Front Entrance Figure 2 19 Pull Tractor Feeding Using the Front Entrance Figure 2 20 Push Pull Tractor Feeding Using the Front Entrance Figure 2 21 Ribbon Advance Mechanism 00 eee eee eee Figure 2 22 Power Supply Circuit Block Diagram Figure 2 23 Power Switch Circuit 2222502453 lit aj data Figure 2 24 Over Voltage Protection Circuit oooocooocooooooo Figure 2 25 35V Line Constant Voltage Control Circuit Figure 2 26 35V Line Overload
108. nnecting the FFCs 6 Disengage the timing belt from the CR motor pinion gear 7 Remove the CR assembly from the rear front CR guide shaft Figure 3 30 Removing the CR Assembly 8 Remove the timing belt from the 2 holding slots under CR assembly 9 Remove the CR assembly ssembly Note Adjust the platen gap and the bidirectional print alignment Refer to Chapter 4 Rev A 3 21 Disassembly and Assembly LQ 2170 Service Manual ssembly Notes Insert the timing belt properly into the 2 holding slots at the bottom of the CR assembly Take up the timing belt slack between the two slots completely as shown in the following figure Insert the 2 oil pads into the proper positions in the CR assembly as shown If you remove the rear CR guide shaft along with the CR assembly be sure to reinstall the rear CR guide shaft in the printer mechanism The rear CR guide shaft has been drilled through the shaft near the right edge and one side of the hole has a chamfered edge This edge should be up CR Assembly 7 ES Timing Belt Figure 3 31 Inserting the Timing Belt Oil Pads Chamfered hole Figure 3 33 Assembling the Rear CR Guide Shaft 3 22 Rev A LQ 2170 Service Manual Disassembly and Assembly 3 2 10 8 Removing the Rear PE Sensor Assembly 1 Remove the rear front edge guide assembly fron
109. nter can be powered by either of two power supply boards the C165 PSB 120 V or C165 PSE 230 V power supply These boards are the same for both the LQ 2170 and FX 2170 Additionally the PSB and PSE boards function the same except for a difference in primary circuitry The power supply board outputs the DC current necessary to drive the printer control circuits and drive mechanism Table 2 5 shows the input voltages and fuse ratings for these boards Table 2 5 Power Supply Board Board Input Voltage Fuse F1 Rating C165 PSB 103 5 to 132 VAC 6 3A 125V C165 PSE 198 to 264 VAC T3 15 AH 250 V 2 2 1 Power Supply Overview The power supply board has two power outputs for use by the various control circuits and drive mechanisms Table 2 6 lists the applications for the two DC output supply voltages Table 2 6 Power Supply Output Voltages and Applications Output Voltage DC Applications 5 V Main Board Logic Circuit Sensors Control Panel LEDs 35 V CR Motor PF Motor Printhead Drive Figure 2 22 shows a block diagram of the power supply circuitry PU Prinaby cit 222227 110101 Sigo Dru 225223 5V Switching Regurator o 5V DC 5V Constant Voltage Control Circuit 5V Over current Protection Circuit Full Wave Rectificatio Circuit Switching Circuit Smoothing Smoothing ircuit Circuit 35V Line Pho
110. nverted to an electric signal and fed back to the control circuit The printhead is also used as a beeper Head driving coils move all the dot wires back and forth at a frequency of 1 98 KHz for 65 5 usec without impacting the platen so that the wires vibrate The vibrating dot wires create the sound used for beep codes Wire Resetting Spring Ribbon Ribbon Mask Stopper Dot Wire Paper Actuating Plate VAN LES ron core Head Driving Coil Platen e Actuating Spring Figure 2 1 Printhead Operation Principles Rev A 2 1 Operating Principles LQ 2170 Service Manual 2 1 2 Carriage Movement Mechanism The carriage movement mechanism consists of the carriage assembly carriage CR motor timing belt driven pulley home position HP sensor etc The CR motor drives the timing belt The carriage assembly is connected to the timing belt which is moved by the CR motor Figure 2 2 shows the carriage movement mechanism The printer detects the carriage home position with the HP sensor This sensor is the basis for determining the carriage position The HP sensor informs the CPU when the carriage is at the home position The sensor is ON when the carriage is pushed to the right or left The striker on the carriage activates the sensor to indicate the carriage is at the home position which toggles the sensor to OFF Table 2 1 CR Motor Assembly Specifications Cat
111. oblem corrected Replace the oil pad mounted on the CR assembly Clean the CR esistance for shaft and lubricate the oil pad lt he ER motor correct NO Replace the and the surface of the CR shaft See Table 5 3 CR motor Is CN4 NO Connect CN4 YES Is the connected NO problem correctly correctly corrected YES YES Is the ENR Replace the C166 f MAIN board END Does the HP sensor work N NO Replace the gt correctly See HP sensor Table 5 2 YES NO Is the YES PB problem corrected Figure 5 3 Flowchart 2 Rev A 5 6 LQ 2170 Service Manual 2 Abnormal Paper Feed Operation 2 1 START Does the PF motor rotate YES the printer is powered on is paper ejected automatically After paper is Ready something stuck to the surface of the PW sensor YES Remove the substance blocking the sensor YES Is the problem corrected ejected does the printer indicate NO connected correctly 2 1 Go to flowchart Paper After paper is ejected does the printer indicate between the front rear PE sensor Out Is the resistance of the PF motor coils correct Troubleshooting Connect it correctly Is the problem corrected Replace the gt PF motor YES NO Replace the
112. ode where you can adjust the tear off position by pressing the LF FF or Load Eject button O If the printer is turned off while in the tear off mode the tear off position is saved and paper is fed back to the TOF position for the next page by turning on the printer again Rev A 1 31 Product Description LQ 2170 Service Manual 1 4 5 Self test Function Pressing the Load Eject button while turning on the printer puts the printer in LQ self test mode Pressing the LF FF button while turning on the printer puts the printer in Draft self test mode You can stop the self test temporarily by pressing the Pause button and you can exit the self test mode by turning off the printer When pages are printed from the CSF the first sheet is used for scaling the sheet length Then the maximum number of printable lines is printed as the bottom line of the sheet and this number is saved in non volatile memory as the default page length Page lengths are saved individually when a dual bin CSF is in use The self test prints out the following O The maximum number of printable lines only on cut sheets from the CSF O The pattern of characters shown in the figure below Roman ABRE 0123456789 lt gt 0ABCDEFGHIJKLMNOPQRSTUVWXYZ XJ _ abcdefeghijklmnopq I B amp k4 0123456789 lt gt 7 ABCDEFGHI JKLMNOPQRSTUVWXYZ _ abcdefghijklmnopgqr HE 0123456789 lt gt ABCDEFGHI JKLMNOPQRSTUVWXYZ _
113. on pin 1 and the other lead on pin 2 and check the voltage while toggling the sensor lever Open 5 V Paper loaded Short 0 V No paper A CN13 PG Sensors 1 PG 1 a GND Place one lead on pin 1 and the other lead on pin 2 and check the voltage while toggling the sensor lever Open 5 V Short 0 V A CN12 Release Sensors 1 and 2 Release 1 GND Release 2 Place one lead on pin 1 and the other lead on pin 2 and check the voltage while toggling the sensor lever Place one lead on pin 3 and the other lead on pin 4 and check the voltage while toggling the sensor lever Open 5 V Short 0 V A A A PW Sensor Place one lead on pin 1 and the other lead on pin 2 and check the voltage while inserting and removing paper between the platen and sensor 0 lt Open Voltage No paper lt Short Voltage Paper loaded A A A Case Open 1 COPEN Sensor A 2 GND 5 2 Place one lead on pin 1 and the other lead on pin 2 and check the voltage while toggling the sensor lever Open 5 V Case open Short 0 V Case closed Rev A LQ 2170 Service Manual Troubleshooting 5 2 3 Motors Table 5 3 Motor Test Points Motor Test Method Connector Number Test Pin Number Set Meter to Ohms Disconnect Motor from Main Board after the Printer is Powered off Meter Reading 2
114. onnect the printer s power cord and interface cable TPE Level Reset is required when the parts is replaced to new one Page 3 5 Before Starting Disassembly Pricedure 322 Page3 6 325 E Bog8s7z 324 Pagos Caas eaaa 32629 baa 305 Removing the Panel Removing the Removing the Removing the Removing the Board Assembly Printhead HP Sensor PW Sneosr Assembly Platen Assembly 3 2 7 Page 3 11 Removing Upper Housing Assembly 220 peo fee Pagas Eben BATIS Removing the Cse Removing the CR Motor Removing the Removing C165 MAIN Removing C165 PSB E Open Sensor Assembly Printer Mechanism Board Board 32101 Page3 14 32102 Page 3 15 eros Page 8 16 3210 1 32 105 Rage3 12 Disassemble Right Frame Assembly i Removing PG Sensor Removing the Right Removing the Left Removing the PFMotor g Frame Assembly Hainan Assembly Page 3 23 Removing the Rear PE Sensor Figure 3 2 Flowchart for Disassembling the Printer 3 2 10 9 Page 3 23 Page3 26 3 210 7 Paye 3 21 Removing the RD Removing CR Assembly Assembly Removing the Fron PE Sensor 3 1 A Rev A LQ 2170 Service Manual Disassembly and Assembly 3 2 1 Before Starting Disassembly Procedures 1 Remove the following parts Front edge guide assembly Front cover Bottom cover Rear edge guide assembly Printer cover Paper eject assembly Front rear tractor assembly Ribbon cartridge
115. or gear through the PF motor pinion gear paper advance reduction gear and tractor reduction gear When the PF motor pinion gear turns in the direction of the black arrow the tractor gear rotates in the direction of the black arrow and thus feeds paper into the printer Paper is advanced by the platen and paper tension roller which are also driven by the PF motor through the gear train When the push tractor method is used with the front entrance the torque generated by the PF motor is transmitted to the push tractor gear through the PF motor pinion gear paper advance reduction gear platen gear and gear train in the front part of the printer When the PF motor pinion gear turns in the direction of the black arrow the tractor gear rotates in the direction of the black arrow and thus feeds paper into the printer Paper is advanced by the paper drive roller and platen which are also driven by the PF motor through the gear train In the push tractor method the release lever is set to one of the tractor positions to release the pressure between the paper guide roller and the platen Figure 2 6 illustrates push tractor operation when paper is fed through the rear paper entrance Figure 2 7 illustrates push tractor operation when the paper is fed through the front paper entrance SS UN 8 Y Q arag Figure 2 6 Push Tractor Operation Using the Rear Paper Entrance 2 6 Rev A Operating Principles LQ 2170 Service Manual Figure
116. or to load the paper quickly The 2nd bin CSF can be connected to the high capacity CSF to allow them to be used as a double bin CSF The following table provides the specifications for these CSF options Hopper capacity Table 1 27 Hopper Capacity Single sheets 150 sheets 1 110 sheets 3 2 50 sheets gt 1 50 sheets 2 185 sheets 2 3 135 sheets 4 60 sheets 5 3 60 sheets gt 4 Envelopes 25 sheets 30 sheets Card stock 50 sheets Multipart paper 40 sheets 1 Plain paper weight 82 g m 22 lb or recycled paper except for A3 size paper 2 Plain paper weight 82 g m 22 1b or recycled paper A3 paper 3 Plain paper weight 64 g m 17 Ib except for A3 paper 4 Plain paper weight 64 g m 17 Ib A3 paper gt 5 Envelopes weight 91 g m 24 Ib 6 Envelopes weight 45 g m 12 Ib 7 Card stock weight 192 g m 51 Ib thickness 0 22 mm 0 0087 8 1 original 5 copies thickness 0 36 mm 0 0142 1 18 Rev A LQ 2170 Service Manual Product Description Stacker capacity Table 1 28 Capacity of the Stacker Single sheets 140 sheets 100 sheets Envelopes 15 sheets 28 sheets Card stock 30 sheets Multipart 36 sheets 1 Single sheets weight 82 g m 22 Ib except for A3 paper X2 Single sheets weight 82 g m 22 Ib A3 paper 36 3 Envelopes weight 91 g m 24 Ib sed Envelopes weight 45
117. ove 3 CBS screws 3 x 6 F Zn securing the right frame assembly at the positions illustrated CBS Screw 3 x6 Securing the Right Frame Assembly Figure 3 20 Removing the Right Frame Assembly 7 Remove the right frame assembly ssembly Notes Adjust the platen gap and bidirectional print alignment Refer to Chapter 4 3 2 10 4 Disassembling the Right Frame Assembly 1 Remove 1 CBS screw 3 x 6 F Zn and 1 CBS screw 3 x 8 F Zn securing the right sub frame The bold line in the illustration is the right sub frame Right Sub Frame CV N CBS Screw 3 X6 FZ n CBS Screw 3 x 8 F Zn Securing the Right Sub Fram Securing the Right Sub Frame Figure 3 21 Removing the Right Sub Frame 3 16 Rev A LQ 2170 Service Manual Disassembly and Assembly 2 Remove the right sub frame from the right frame assembly 3 Remove the following 11 parts from the right frame assembly 2 compression springs 200 g 2 plain washers 1 spur gear 27 mm 2 spur gears 34 5 mm 1 spur gear 34 mm 1 spur gear 21 mm 1 combination gear 8 mm 31 5 mm 1 intermittent gear ssembly Notes Adjust the bidirectional print alignment Refer to Chapter 4 Mount the 11 parts above on the right frame assembly as shown in the following figures Compression Spring 200g ger paan Plan Washer Linn Super Gear 34 5 mm Combination Gear 8mm 31 5mm Intermittent Gear Compr
118. over and ribbon cartridge see Section 3 2 1 2 Remove the CB screw 2 5 x 5 F Zn securing the PW sensor to the ribbon mask holder Then remove the FFC from the PW sensor connector mounted onto the CR cover 3 Remove the PW sensor assembly along with the CR cover by pushing and releasing the 2 clips for the CR cover as shown in the following figure PW Sensor Assembly CB Screw 2 x 5 F Zn Figure 3 9 Removing the PW Sensor Assembly 3 8 Rev A LQ 2170 Service Manual Disassembly and Assembly Assembly Notes Mount the PW sensor assembly onto the ribbon mask holder groove aligning the bottom line of micro photo sensor to the bottom line of the groove Whenever you remove the PW sensor assembly clean the surface of the sensor by wiping it with a soft material If the surface is not clean abnormal operations may occur such as printing on the platen surface The tightening torque for the CB screw 2 5 x 5 F Zn 0 08 0 12 Nm 0 8 0 12 Kg f cm When you replace the PW sensor assembly reset the TPE level Refer to Chapter 4 Micro Photo Sensor View of PW Sensor through Ribbon Mask Holder Ribbon Mask Holder Figure 3 10 Mounting Position for the PW Sensor Assembly Rev A 3 9 Disassembly and Assembly LQ 2170 Service Manual 3 2 6 Removing the Platen Assembly 1 Remove the printer cover ribbon cartridge and platen knob see Section 3 2 1
119. paper is loaded correctly but continuous paper is not loaded at all CN12 is not connected correctly Checkpoint Check the connector Refer to page 3 19 Solution Connect the CN 12 correctly The release sensor is defective Check the operation of the release sensor Refer to page 5 2 Replace the release sensor Refer to page 3 19 Ribbon feed is abnormal The ribbon is not fed The ribbon cartridge is defective Remove the ribbon cartridge Then rotate the ribbon feed roller manually to check that the ribbon cartridge feeds the ribbon normally Replace the ribbon cartridge Foreign substances are caught in the gears Check that the ribbon driving gear rotates properly when the carriage is moved manually Remove any foreign substances or replace the ribbon cartridge 5 18 The ribbon feeds properly only when the carriage moves in one direction The planetary gear is defective Manually move the carriage and check that the planetary gear functions normally Replace the ribbon cartridge mechanism Rev A LQ 2170 Service Manual Rev A Troubleshooting 5 19 CHAPTER6 Maintenance Table of Contents 6 1 PREVENTIVE MAINTENANCE 6 1 6 2 APPLYING LUBRICATION 6 1 List of Figures Figure 6 1 Lubrication Points 1 and3 AA 6 2 Figure 6 2 Lubrication POMEL s PSA ead pes oa 6 2 Figure 6
120. part Refer to Table 1 9 PL length Refer to Table 1 8 Refer to Table 1 9 LM left margin 3 mm 0 12 or more PW lt 364 mm 14 33 25 mm 0 98 or more PW 420 mm 16 5 3 mm 0 12 or more PW lt 364 mm 14 33 25 mm 0 98 or more PW 420 mm 16 5 RM right margin 3 mm or more PW lt 364 mm 14 33 25 mm 0 98 or more PW 420 mm 16 5 3 mm or more PW lt 364 mm 14 33 25 mm 0 98 or more PW 420 mm 16 5 TM top margin 4 2 mm 0 17 or more 4 2 mm 0 17 or more BM bottom margin 4 2 mm 0 17 or more 4 2 mm 0 17 or more Figure 1 3 Printable Area for Cut Sheets Rev A LQ 2170 Service Manual Product Description Envelopes and Card Stock Paper media specifications No 6 envelopes The following tables gives specifications for envelopes and card stock Table 1 11 Specifications for Envelopes Front Entry Rear Entry Minimum Maximum Minimum Maximum 166 mm 6 5 92 mm 3 6 No 10 envelopes 240 mm 9 5 104 mm 4 1 Total thickness 0 16 mm 0 0063 0 52 mm 0 020 Differences in thickness in the printable area must be within 0 25 mm 0 0098 Weight 45 g m 12 Ib 91 g m 24 Ib Quality Bond paper plain paper or airmail No glue at the flap Not curled folded or crumpled Print
121. pper housing assembly Remove the platen knob Ge NO Lift up the front side of the upper housing assembly by releasing 2 hooks from the holes located on right and left of the front bottom side Figure 3 13 Releasing the Upper Housing Assembly Hooks 6 Remove the upper housing assembly Figure 3 14 Removing the Upper Housing Assembly Assembly Note The tightening torque for the CBB 4 x 14 F Zn 0 98 Nm 10 12 Kg cm Rev A 3 11 Disassembly and Assembly LQ 2170 Service Manual 3 2 8 Removing the Case Open Sensor Assembly 1 Remove the rear edge guide assembly paper eject assembly rear tractor unit and printer cover see Section 3 2 1 2 Remove the panel board see Section 3 2 2 and upper housing assemblies see Section 3 2 7 3 Turn the upper housing assembly over and remove the case open sensor assembly by loosening the CBB screw 3 x 8 F Zn fixing the sensor holder to the upper housing assembly C B B Screw E VA C B Screw 3x8 F Zn E if 2 x8 F Ni Case Open Sensor Assembly ETN Sensor E Holder Upper Housing Assembly Figure 3 15 Removing the Case Open Sensor Assembly 3 2 9 Removing the CR Motor Assembly 1 Remove the rear edge guide assembly paper eject assembly rear tractor unit and printer cover see Section 3 2 1 2 Remove the panel board see Section 3 2 2 and upper housing assemblies see Section 3 2 7 3 Remove the 2 CR mounting screws securing
122. pter 4 3 24 Rev A LQ 2170 Service Manual Disassembly and Assembly 3 2 12 Removing the C165 PSB E Board Assembly 1 Remove the rear front edge guide assembly front cover paper eject assembly rear front tractor unit and printer cover Remove the panel board see Section 3 2 2 and upper housing assemblies see Section 3 2 7 Remove the 5 CBB screws 3 x 12 F Zn securing the C165 PSB E board assembly Disconnect the cable for CN3 on the C165 MAIN board assembly Disconnect the cable for the fan motor from CN3 on the C165 PSB E board assembly Remove the C165 PSB E board assembly while pulling up the fan motor a NA KR N CN3 Connector Figure 3 37 Removing the C165 PSB E Board Assembly ssembly Notes Insert the cable for CN2 C165 PSB E board assembly side under the fan motor The tightening torque for the CBB screw 3 x 12 F Zn 0 78 0 98 Nm 8 10 Kg cm Notice the direction for mounting the fan motor Refer to the following figure Figure 3 38 Direction for Mounting the Fan Motor Rev A 3 25 Disassembly and Assembly LQ 2170 Service Manual 3 3 Disassembly and Assembly of CSF Bin 1 This section describes procedures for disassembling and assembling the optional cut sheet feeder In general you can install a component in the CSF simply by reversing the procedure for removing it Therefore this section does not describe assembly procedures in most cases If necessa
123. r sounds for 500 ms with an interval of 100 ms indicates that the LED or beeper is not used to indicate this status condition 1 30 Rev A LQ 2170 Service Manual Product Description 1 4 3 Micro Adjust Function The micro adjust function lets you set the TOF and tear off positions After the printer is put in this mode you can adjust the top of form TOF position up or down in increments of 116 inch by pressing the LF FF or Lodid Eject button The adjusted TOF position is saved to the EEPROM If the printer is turned off the setting is not cleared The function is operational in the printer under the following conditions and within the following area Conditions required for the adjustment The TOF position can be adjusted under the following conditions 1 The data buffer is empty and the printer is on line 2 Paper is at the TOF position 3 The Pause button is held down more than 3 seconds to put the printer in micro adjust mode Adjustable area Micro adjust positions can be set within the following range from the top edge of the page 3 mm 8 5 mm 8 5 mm 2 87 9 mm 0 12 0 33 0 33 11 34 1 4 4 Tear Off Function The tear off function advances continuous paper to the tear off position when the Tear Off Bin button is pressed There are two modes for this function auto tear off and manual tear off The tear off mode can be selected in the default setting mode After the paper is torn off at the perforation it is fe
124. ration 1 28 Table 1 41 Operations in Normal Mode 00 cece eee eee 1 29 Table 1 42 Operations at Power On ee 1 30 Table 1 43 Operations for Default Setting Mode 1 30 Table 1 44 Indicators and Beeper cece eee eee 1 30 Table 1 45 EEPROM Initialization SettingS oooooooooocooo 1 33 LQ 2170 Service Manual Product Description 1 1 Specifications These specifications provide statistical information for the the LQ 2170 serial impact dot matrix printer 1 1 1 Features The LQ 2170 is a 24pin serial impact dot matrix printer suitable for the VAR value added reseller market The major features of this printer are Print speed High speed draft 440 characters per second cps Draft 330 cps LQ 110 cps at 10 characters per inch cpi Feeding method Friction feed front rear Push tractor feed front rear Push and pull tractor feed front rear Pull tractor feed front rear bottom Feeder Front push tractor rear push tractor CSF bin 1 bin 2 optional Pull tractor optional roll paper holder optional Paper media Single sheets continuous paper multipart paper envelopes card stock labels roll paper Fonts 9 LQ and draft bitmap typefaces 8 barcode fonts Character tables Input buffer Acoustic noise Reliability Interfaces Control codes Copy capability Control panel functions Standard version 11 tables N
125. ry special notes on assembling a component are given at the end of the description of each procedure 3 3 1 Disassembling the Right Side Block 1 Remove the CSF gear cover by pushing and releasing the 4 clips in the following figure CSF Gear Cover NG Right CSF Frame Va Figure 3 39 Releasing the Clips for the CSF Gear Cover 2 Remove the 3 CPB tight 3 x 12 screws securing the stepping motor to the right CSF frame Disconnect connector CN1 from the CSF board assembly and then remove the stepping motor Remove the CPB tight 3 x 12 screw securing the CSF board assembly and disconnect connector CN2 5 Remove the CSF board assembly by releasing 1 clip fixing the CSF board assembly to the right CSF frame 6 Remove the 13 gears mounted on the right CSF frame 3 26 Rev A LQ 2170 Service Manual Disassembly and Assembly ssembly Notes Be careful of the cable alignment for the CN1 connector cable and earth cables Align those cables as shown in the following figure If these cables is not aligned properly the CSF gear cover cannot be assembled properly Right CSF Frame Connector CN1 Connector CN2 Figure 3 40 Cable Alignment Use the following figure to assemble the 13 gears onto the right CSF frame Gear 29 mm Driven Transmission Gear Paper Eject DrivenTransmission Gear CSF Planetary Lever Assembly Gear 18mm CSF Planetary
126. settings the program displays the Main Menu Program J10A00E Setting DEFSTD 9pins VRO 0 VR1 0 VR2 0 Main MENU Bi d Adjust 6 TPE LEVEL RESET Check Pro FF Check Pro A3 Check Pro A4 Check Pro Envelope Figure 4 13 Main Menu gt 1 2 3 4 5 8 In this menu select one of the check programs from 2 to 5 depending on the paper loaded run that check program to print out check patterns Running the check program writes the selected factory settings to EEPROM 9 To exit the program press ESC until the display returns to the MS DOS prompt Rev A 4 7 Adjustment LQ 2170 Service Manual 4 2 4 TPE Level Reset This section describes the procedure to reset the TPE top paper end level This operation is required when the PW sensor assembly is replaced and if it is not performed the printer does not recognize that the PW sensor has been replaced thus limiting the ability of the new sensor to operate This reset operation can be performed only from the Settings Diskette Note After this operation the reset value for the TPE LEVEL is printed out automatically Check that the reset value is FF 1 Insert the Settings Diskette into Drive A of the PC and turn the power on 2 Type GWBASIC and press ENTER 3 Load and run the J10A00E program First the Machine Select Menu is displayed Program J10A00E Setting DEFSTD 9pins VRO 0 VR1 0 VR2 0 Printer select gt 1 9 pins
127. ssion Gauge White Gear 22mm Spring Plain Washer Gear 22mm Figure 3 50 Engaging 5 Gears Rev A 3 31 Disassembly and Assembly LQ 2170 Service Manual 3 4 2 Disassembling the Paper Support Block Assembly 1 Remove 1 E ring fixing the paper feed roller shaft to the right CSF frame 2 Remove 2 CTBS 3 x 8 screws securing the paper support shaft to both right and left CSF frames E ring CTPB Screw 3x8 Figure 3 51 Removing 1 E ring and 2 CTBS Screws 3 Remove both paper support assemblies along with the paper feed roller shaft and paper support shaft 4 Remove the paper feed shaft from both paper support assemblies by pulling them toward the right or left side 5 Remove both paper feed rollers from the paper support assemblies 6 Remove both CSF roller covers by releasing the clips fixing them to the paper support assemblies 7 Remove the paper support shaft by pulling out it toward the right or left side Left CSF Roller Cover N Right CSF Roller Cover Figure 3 52 Removing the CSF Roller Cover 8 Remove the paper holder and then remove the paper holder spring ssembly Note Be careful to assemble the paper feed roller into the proper side of the paper support assembly The right and left rollers are not interchangeable 3 32 Rev A CHAPTER 4 Adjustments Table of Contents 4 1 ADJUSTMENT OVERVIEW 4 1 4 1 1 Required Ad Siesta o E ate ee betes Rane Pa oe ee 4 1 4 1 2 Requ
128. t cover paper eject assembly rear front tractor unit and printer cover Remove the panel board see Section 3 2 2 and upper housing assemblies see Section 3 2 7 Remove the printer mechanism see Section 3 2 10 4 Turn the printer mechanism over and insert a standard screwdriver or other prying tool into hole in the rear frame shown in the figure 5 Release 2 clips while pushing up the rear PE sensor with the screwdriver or other prying tool Rear PE Sensor Assembly J 2 Clips Figure 3 34 Removing the Rear PE Sensor Assembly 6 Remove the rear PE sensor after disconnecting the connector 3 2 10 9 Removing the Front PE Sensor Assembly 1 Remove the rear front edge guide assembly front cover paper eject assembly rear front tractor unit and printer cover 2 Remove the panel board see Section 3 2 2 and upper housing assemblies see Section 3 2 7 Remove the printer mechanism see Section 3 2 10 4 Turn the printer mechanism over on the reverse side and remove the front PE sensor by pushing and releasing the 2 clips Figure 3 35 Removing the Front PE Sensor Assembly Rev A 3 23 Disassembly and Assembly LQ 2170 Service Manual 3 2 11 Removing the C165 MAIN Board Assembly 1 6 Remove the rear front edge guide assembly front cover paper eject assembly rear front tractor unit and printer cover see Section 3 2 1 Remove the panel board see Section 3 2 2 and upper housing assemblies see Se
129. te Default ESC SPACE gt RET HOME Figure 4 8 Bi d Adjustment Menu Mode 0 VRO 0 PAA HRE REEE HHHHHHHH HHHHHHHHHHHHHHHHHHH HHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH Figure 4 9 Current Bi d Print Alignment 11 If the Bi d pattern is not aligned properly adjust it by changing the value with the or key If the second row is shifted to the right of the first row change the value by pressing the key and print the new Bi d print alignment pattern by pressing SPACE If the second row is shifted to the left of the first row change the value by pressing the gt key and print the new Bi d print alignment pattern by pressing SPACE Perform this operation for each mode 0 1 and 2 12 When the Bi d print alignment is correct for each print mode press ENTER to write the adjusted values to the EEPROM and print the adjusted value for each mode This operation returns the program to the Main Menu automatically 13 To exit this program press ESC until the computer returns to the MS DOS prompt Note The factory settings are written to the EEPROM when you run one of the the check programs shown in the Main Menu After you select the factory settings be sure to run the check program Rev A 4 5 Adjustment LQ 2170 Service Manual 4 2 2 2 Bi d Print Alignment Adjustment from the Control Panel 1 Turn the printer on while pressing the PAUSE button to put the printer
130. the CR motor assembly After releasing the extension spring 15 7 g disengage the timing belt from the CR motor assembly 4 Disconnect the cable for CN11 from the C165 MAIN board assembly 5 Remove the CR motor assembly from the printer mechanism CR Mounting Screws Figure 3 16 Removing the CR Motor Assembly Assembly Notes The tightening torque for the 2 CR mounting screws 0 78 0 98 Nm 8 10 Kg cm Adjust the bidirectional print alignment Refer to Chapter 4 3 12 Rev A LQ 2170 Service Manual Disassembly and Assembly 3 2 10 Removing the Printer Mechanism 1 Remove the rear front edge guide assembly front cover paper eject assembly rear front tractor units and printer cover see Section 3 2 1 2 Remove the panel board assembly see Section 3 2 2 and upper housing assembly see Section 3 2 7 3 Remove 4 printer mechanism mounting screws securing the printer mechanism 4 Disconnect the following connectors on the C165 MAIN board assembly CN4 3 pin white CNS 3 pin black CN6 2 pin white CN7 4 pin white FFC CN8 18 pin white FFC CN9 16 pin white FFC CN10 4 pin blue CN11 5 pin blue CN12 4 pin white CN13 2 pin black X Disconnect the cables for CN10 and CN11 after releasing the connector locks by pulling up 5 Remove the printer mechanism gt Printer Mechanism Mounting Screws e Figure 3 17 Removing the Printer Mechanism Asse
131. the figure below Base sheet width 101 mm 406 mm 101 mm 406 mm 4 0 16 4 0 16 Base sheet length 101 mm 559 mm 101 mm 559 mm one page 4 0 22 4 0 22 Base sheet thickness 0 07 mm 0 09 mm 0 16 mm 0 19 mm 0 0028 0 00352 0 0063 0 0075 Total thickness 0 16 mm 0 19 mm 0 16 mm 0 19 mm 0 0063 0 0075 0 0063 0 0075 Label weight 68 g m 17 Ib 68 g m 17 Ib Quality Avery continuous Avery continuous form labels form labels Avery mini line or Avery mini line or equivalent quality equivalent quality labels labels 3k Printing on labels is available only at normal temperatures and humidity 3k The base sheet for the labels must be continuous paper 3k Continuous paper with labels should be inserted from the front or bottom entrance e 2 5inch 63 5mm min gt ES 15 16inch 23 8mm Label min H RO 1inch 2 5mm min Figure 1 6 Label Size Printable size and area The figure above is the printable size for the labels The printable area for the base sheet containing the labels depends on conditions in Figure 1 5 and Table 1 15 1 14 Rev A LQ 2170 Service Manual Product Description Roll Paper Note Roll paper is not available in all models and not available in the U S Paper media specifications The following table shows specifications for roll paper Table 1 17 Specifications for Roll Paper Front Entry Rear Entry Minimum
132. the input signal is correct and the output signal is not correct replace the IC11 Paper feed is abnormal IC1 is defective Check the output signal waveform at pin If this signal is 15 of IC1 not output replace IC1 No data is printed IC2 is defective Check the voltage waveform CH1 at If the head drive One of the head drive pin 69 and pins 76 89 pins 91 99 of signal is not transistors is defective IC2 output replace Q5 Q28 Check the voltage waveform CH2 for IC2 If the head each transistor drive signal is output replace the head drive transistor A particular dot fails to print 5 14 Rev A LQ 2170 Service Manual Troubleshooting 5 6 REPAIRING THE PRINTER MECHANISM This section provides instructions for repairing the printer mechanism It describes various problems symptom likely causes checkpoints and solutions The checkpoint column shows items to be checked including proper values to be set for each component of the printer mechanism For replacement and adjustment instructions see Chapter 3 Disassembly and Assembly and Chapter 4 Adjustments If the same symptom recurs after repair select another item in the list of causes and repair the printer according to those
133. tion resistance 10 MQ min between AC line and chassis 500 VDC Dielectric strength 1000 VAC rms 1 min or 1200 VAC rms 1 sec between AC line and chassis Table 1 21 Electrical Specifications for the 220 240 V Version Rated voltage 220 to 240 VAC Input voltage range 198 to 264 VAC Rated frequency range 50 to 60 Hz Input frequency range 49 5 to 60 5 Hz Rated current 0 5 A maximum 1 3 A Power consumption Approx 62 W self test in draft mode at 10 cpi Insulation resistance 10 MQ min between AC line and chassis 500 VDC Dielectric strength 1500 VAC rms 1 min between AC line and chassis Rev A LQ 2170 Service Manual Product Description 1 2 7 Environmental Conditions Table 1 22 explains the conditions the printer requires during operation and when not operating Table 1 22 Environmental Requirements Temperature 5 to 35 C 41 to 95 F operating xk 1 15 to 25 C 59 to 77 F operating 5k 1 gt 2 430 to 60 C 22 to 140 F non operating Humidity 10 to 80 RH operating 1 30 to 60 RH operating 1 2 0 to 85 RH non operating 5k 1 Resistance to shock 1G within 1 ms operating 2 G within 2 ms non operating k 3 Resistance to vibration 0 25 G 10 to 55 Hz operating 0 50 G 10 to 55 Hz non operating 5k 3 3k 1 Without condensation Me 2 During printing on multipart paper envelopes card sto
134. tions on the preceding page The chapters are organized as follows Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Provides a general product overview Lists specifications and illustrates the main components of the printer Describes the theory of printer operation Includes a step by step guide for product disassembly and assembly Includes a step by step guide for addjustement Provides Epson approved techniques for troubleshooting Describes prevetive maintenance techniques The contents of this manual are subject to change without notice REVISION SHEET Revision Issued Date Revision Page Rev A December 5 1995 1st issued TABLE OF CONTENTS CHAPTER 1 CHAPTER 2 CHAPTER 3 CHAPTER 4 CHAPTER 5 CHAPTER 6 APPENDIX GENERAL DESCRIPTION OPERATION PRINCIPLES DISASSEMBLY AND ASSEMBLY ADJUSTMENTS TROUBLESHOOTING MAINTENANCE CHAPTER 1 Product Description Table of Contents 1 1 Specifications 1 1 LAA ESAS in aa 1 1 WAAC COSSONIGS 5 iis Naga a ean eed si e a 1 3 1 2 Hardware Specifications 1 4 1 2bPrinting Method ii ank dadas a oes tad a 1 4 1 2 2 Printing Specifications S su sree She Hee e ad Rue eee Ra eee x 1 5 1 2 3 Paper Handling Specifications wii Meares eG Shree Bes wed a dea 1 6 1 2 4 Paper Specifications sais ctedbeoucded co e Geese bh ates 1 8 1 2 5 Ribbon Specifications 2 avg wwe Dena tev Oke Badd
135. to Over Load Coupler Detector Circuit T 35V Line A Constant Voltage Control Circuit CPU Filter Circuit Port 20 AC input Photo Coupler 35V Line Over Voltage Protection Circuit 5V Line Over Voltage Protection Circuit 35V Line Over Current Protection Circuit o Operation SW Figure 2 22 Power Supply Circuit Block Diagram As shown in the figure above when AC power enters the printer from an external power source the filter circuit removes the noise The AC voltage then undergoes full wave rectification and is smoothed to produce direct voltage The voltage is fed to the gate port for the switching FET Q1 K1531 or K1692 through resistors R18 and R31 and then the switching circuit operates The secondary smoothing circuit produces a stepped down 35 VDC voltage The 5 VDC voltage is generated by feeding the 35 VDC voltage through the 5 VDC power supply circuit where the 35 VDC is stepped down to a stable 5 VDC from the 35 VDC line Rev A 2 17 Operating Principles LQ 2170 Service Manual 2 2 2 Power Supply Circuit Operation The power supply circuit is composed of an RCC ringing choke converter system and the power switch circuit in the secondary circuitry The power supply circuit has several protection and control circuits This section describes these circuits 1 Power Switch Circuit The power switch circuit is in the secondary c
136. top margin 4 2 mm 0 17 or more 4 2 mm 0 17 or more BM bottom margin 4 2 mm 0 17 or more 4 2 mm 0 17 or more gt LM lt mi DANG TM A PL PRKRINKAD LE Y moy Figure 1 4 Printable Area for Envelopes and Card Stock Rev A Product Description LQ 2170 Service Manual Continuous Paper Paper media specifications The following table gives specifications continuous paper Table 1 14 Specifications for Continuous Paper Single Sheet and Multipart Front Entry Rear Entry Bottom Entry Width Minimum 101 mm 4 0 Maximum 406 mm 16 Minimum 101 mm 4 0 Maximum 406 mm 16 Minimum 101 mm 4 0 Maximum 406 mm 16 Length 101 mm 4 0 559 mm 22 101 mm 4 0 559 mm 225 101 mm 4 0 559 mm 22 Copies 1 original 4 copies 1 original 4 copies 1 original 4 copies Total thickness 0 065 mm 0 0025 0 39 mm 0 015 0 065 mm 0 0025 0 39 mm 0 015 0 065 mm 0 0025 0 39 mm 0 015 Weight not multipart 52 3 g m 14 Ib 82 g m 22 Ib 52 3 g m 14 Ib 82 g m2 22 Ib 52 3 g m 14 Ib 82 g m2 22 Ib Weight one sheet of a multipart form 40 g m 12 Ib 58 g m 15 Ib 40 g m 12 Ib 58 g m 15 lb 40 g m 12 Ib 58 g m 15 Ib Types of paper Plain paper Recycled paper
137. ul Checked _ Not necessary Printhead Is the platen gap adjusted correctly _ Checked _ Not necessary printing Is the bidirectional print position _ Checked _ Not necessary Adjustment adjusted correctly Default Have user changeable settings been Checked _ Not necessary settings reset to the default values ROM ROM version Checked _ Not necessary version Shipment Has the ribbon been removed L Checked L Not necessary Have all relevant parts been included _ Checked Not necessary in the shipment 3 2 Rev A LQ 2170 Service Manual Disassembly and Assembly 3 1 4 Specifications for Screws Table 3 4 lists the abbreviations used in the following sections for small parts such as screws and washers Table 3 4 Screw Types and Abbreviations Cross recessed pan head S tight screw Cross recessed bind head B tight screw Cross recessed bind head S tight screw Cross recessed bind head N tight screw Cross recessed bind head C Lamitite screw Cross recessed bind head A lamitite screw Cross recessed bind head with outside toothed lock washer Cross recessed head B tight with Notch TL C lamitite WU A lamitite Y UN Figure 3 1 Screw Types and Abbreviations Rev A 3 3 Disassembly and Assembly LQ 2170 Service Manual 3 2
138. ultipart NOE a Open Copy 0 32 3 Open Copy 0 39 5 Open Copy Labels 0 07 0 19 2 Open Copy Envelopes 0 16 0 32 2 Open Copy 0 16 0 40 3 Open Copy 0 22 0 44 4 Open Copy 0 23 0 46 4 Open Copy 0 26 0 52 6 Open Copy Card Stock 0 22 2 Open Copy Rev A 2 3 Operating Principles LQ 2170 Service Manual 2 1 4 Paper Handling Mechanisms During the normal operation paper is fed to the printer advanced to the specified position and ejected from the printer These paper handling operations are performed by various paper handling mechanisms such as tractors platens rollers and gears This section describes the printer s paper handling mechanisms 2 1 4 1 Release Lever The release lever is used to select friction for rear front tractor feed or to release the paper for pull tractor feed Changing the release lever position moves the paper guide rollers and the new lever position is detected by 2 release switch sensors RLSW1 and RLSW2 See the following table Table 2 3 Release Lever Position Rel L Position Status of Paper Guide Rollers RLSW1 RLSW2 Friction mode The paper guide rollers are Open Open pressed against the platen Front push tractor The paper guide rollers are Closed Open mode separated from the platen Rear push tractor The paper guide rollers are Closed Open mode separated from the platen Pull tractor mode The paper guide ro
139. upport shaft by pulling it toward the right or left side 11 Remove the paper holder spring ssembly Note Be sure to assemble the paper feed roller into the proper side The right and left rollers are not interchangeable Rev A 3 29 Disassembly and Assembly LQ 2170 Service Manual 3 3 3 Removing the Paper Eject Assembly Cover 1 Remove the paper eject assembly cover by releasing 2 clips located along both edges of the paper eject assembly cover as shown in the following figure Figure 3 47 Removing the Paper Eject Assembly Cover ssembly Note When attaching the paper eject assembly cover to the CSF unit pay attention to the position of 2 pieces of thin plastic film glued on the reverse side of the paper eject assembly cover as shown in the following figure Thin Plastic Film Figure 3 48 Assembling the Paper Eject Assembly Cover 3 30 Rev A LQ 2170 Service Manual Disassembly and Assembly 3 4 Disassembly and Assembly of CSF Bin 2 3 4 1 Disassembling the Right Side Block 1 Remove the gear train cover by releasing the 4 clips shown in the following figure Gear Fran Cover Figure 3 49 Removing the Gear Train Cover 2 Remove the following 5 gears and 1 spring from the right CSF frame ssembly Note Pay attention how the 5 gears are engaged Refer to the following figure Combination Gear 25 mm 11mm CSF Planetary Lever Assembly CSF Transmi
140. us The PSRAM IC5 Check for a change in the signal from Replace IC2 or A HIGH LOW at pin 132 of the IC replace the main board 5 12 Rev A LQ 2170 Service Manual Troubleshooting Table 5 7 Repairing the C165 MAIN Board Assembly Problem Checkpoint Solution Check the oscillator signal at pins 26 If the signal is not or 27 of the CRU1 correct replace IC1 or replace the main board Otherwise replace CRU1 The printer does not CRU1 is defective operate at all Check input signal waveform CH1 If the input signal at pins 6 5 17 and 16 of IC1 is not correct Check output signal waveform CH2 replace IC1 or at pins 8 1 18 and 11 of IC12 replace the main board If the output signal is not correct replace IC12 C11 or IC1 is defective Carriage operation is abnormal IC2 is defective Check the output signal at pins 65 64 If there is no 63 62 of IC2 output signal replace IC2 Rev A 5 13 Troubleshooting LQ 2170 Service Manual Table 5 7 Repairing the C165 MAIN Board Assembly Problem Checkpoint Solution IC1 is defective IC2 is Check input signal waveform at pins 43 If the input signal defective IC11 is and 26 of IC11 is not correct defective Check output signal waveform at pins 6 replace IC1 or 3 18 and 21 IC2 If

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