Star Micronics SP320S User's Manual
Contents
1. 2 4 3 Paper Feed Mechanism The paper feed mechanism comprises of the paper feed motor the gear train the paper feed roller and the holder roller The gear train transmits the rotation of the paper feed motor to the paper feed roller The paper sandwiched between the paper feed roller and the holder roller is driven upwards The paper feed motor is a permanent magnet 4 phase 48 pole stepping motor One step of this motor drives the paper 1 72 inch Paper Feed Motor PF Roller Gear Train Figure 2 16 Paper Feed Mechanism 2 14 THEORY OF OPERATION 2 4 4 Ink Ribbon Feed Mechanism The ink ribbon feed mechanism comprises of the ribbon cartridge the carriage motor and the gear train The gear train transmits the rotation of the carriage motor to the bevel gear the ribbon is contained in the ribbon cartridge and tied into an endless loop When the bevel gear turns the ribbon feed roller the ink ribbon sandwiched between the ribbon feed roller and the ribbon pressure roller is wound up The ribbon brake spring keeps slack out of the ribbon Ribbon Brake Spring Ink Ribbon 2 Ribbon Feed Roller Ribbon Cartridge Ribbon Pressure Roller Carriage Motor Reduction Gear Train Fig 2 17 Ribbon Feed Mechanism 2 15 THEORY OF OPERATION 2 4 5 Detectors Besides the timing detectors and home position detector discussed in 2 4 2 there are also the following detectors 1 Cover open de2. CN Peta 52065 6645 we PERIPHERAL E D ii 9271391 j5 EXT2 L T 216 33K uim RI9 47K Ria 47K CN3 5483 5y 5Y 2 PAPER END 5101 Ys 3 GND al AU LP 6264 100 51832 120 2 5 IC9 HCOO SIDE C 6 15 PARTS LIST 6 5 1 2 Component Layout 6 16 PARTS LIST 6 5 1 3 Parts List Main Logic Board Serial Interface 1 08200140 1 04712 6 1 Oso 4H 08200156 1 DA712AGT E2 TP 102 __ 08250009 0 0418 Taif 3 1 08210116 TTL IC 741506 FLAT TYPE ___ 1 4H 08210144 TTL IC 741506 TP 104 08240019 GATE ARRAY 16920118 59300 105 08200109 10 8 5 519538 1 5 124441 107 _ 08222026 EPROM 27256 1505 1 SP38 5 800 09110024 IC SOCKET 1608 28 21 o 1 1 08221043 SRAM 6264FP 100NS EL ws acp 4H 08230058 CMOS 74HCOOAF TLI ___ 1 ___ 000 1010 1109110077 IC SOCKET 165 3227 1 REG 08202011 IC REG UPC7824 1 8 07650029 TRANSISTOR ARRAY MP4001 ___ __ 1 Ss 07650056 TRANSISTOR ARRAY UPA1428AH 1 TR2 07227853 TRANSISTOR 25C17408E 1 j 183 07009502 TRANSISTOR 254950
3. 0 1UF 25V __________ 8C1 7 05131044 0 1UF 25V pua 808 05532234 CAPACITOR 0 022UF 25V 89 10 05131044 0 1UF 259 pep DSW1 2 09090034 SWITCH 55081 871 45060201 BUZZER QMB 111P 1 C 09250037 OSCILLATOR CST9 83MT 1 gt i 5 09100400 CONNECTOR HLEMI4S 1 CN 09100419 CONNECTOR HLEMI9S 1 1 C eng 09100269 CONNECTOR 5483 03 ense 057 09100421 CONNECTOR 52065 6645 Jil C ___ CN 09100448 CONNECTOR 57RE40360 730812A 1 gt gt Pose CN10 1109100420 CONNECTOR 888 1 ema 09100317 CONNECTOR 5483 044 PP Goo 6 27 PARTS LIST 6 6 Control Panel Board 6 6 1 Circuit Diagram CN1 5V 1 R 1 LED 1 2708 LTIEZ 1A R2 LED 2 2700 LT1D11A ARARM LAMP 4 6 ALARM LAMP 2708 N L OL LAMP 5 6 ON LINE LAMP SW 1 4 SKHHAL OL SW ON LINE SWITCH SW 2 SKHHAL FEED SW 6 kO FEED SWITCH SW3 OP SW 7 lI 73 GND 8 O L _ _ 6 6 2 Component Layout 6 6 3 Parts List LED 1108300058 LED __ 1 202 08300081 LED LT 1011A 11 RI 3 06052714 RD RESISTOR 270 1 6N 13 1 sw1 2 09010041 PUSH SWITCH SKHHAL 2
4. DP Sw POWER LAMP CONTROL PANEL UNIT ALARM LAMP ON LINE LAMP GND CNS REWINDERI REWINDERL F GND FOR REWINDER F P POSITION RESET SIG 2 FOR AUTO CUTTER F GND PERIPHERAL EXTI 24 I 2 3 24 4 PERIPHERAL EXT2 5 PERIPHERAL SWI 6 CN3 TIMINGZ TIMING H P PRINTER MECHANISM PAPER OUT SENSOR1 PAPER END 5161 GND GND BLACK MARK SENSOR 3 FOR BLACK MARK SENSOR MAIN LOGIC BOARD 6 10 PARTS LIST 6 4 2 For Parallel Interface POWER SUPPLY BOARD MOTOR CONTROL CONTROL PANEL BOARD TIMING TIMINGI CN1 578 ____ 2 DATA i 4 iz 3 DATA
5. CAPACITOR 0 022UF 25V O lt 6 38 PARTS LIST 6 12 Current loop Board BD320L option 6 12 1 Circuit Diagram PCI PS2401 2 l 2 RI R3 TTY TXD 23 l TTY TXD 10 TTY TXDR 22 TTY TXDR 19 2 DTR Ji TXD PS240I 2 l2 TTY RXD 2 201 3 124 RxD 45V 4 8 4 TTY RXDR 9 TTY RXDR 20 0 0224F 25 7 GND 6 12 2 Component Layout BAN SA Nr Be 6 12 3 Parts List Ici 8210001 TTL IC 74500 EP PC 908300032 JOPTCOUPLER 52401 2 Toif TR 07227851 TRANSISTOR 25C27859HFE Jif D1 08000001 DIODE 151586 1 J 1 08000096 DIODE 152076A on S RI 06051514 RD RESISTOR 150 OHM 1 60 1 R2 06051034 RD RESISTOR 10 K OHM 1 60 Jif S S R3 06054725 RD RESISTOR 4 7 K OHm 1 6w 1 RA 06054714 RD RESISTOR 470 OHM 1 60 Jif R5 06051025 RD RESISTOR 1 K OHM 1 68 05532234 CAPACITOR 0 022UF 25V TT 561 09000048 SLIDE SWITCH ESD 14345 Jif C 0 09100430 11 245 50 Soif TT 09990513 BOARD SPACER DSPLS 10 6 39 ELECTRONIC PRODUCTS DIVISION STAR MICRONICS CO LTD 536 Nanatsushinya Shimizu Shizuoka 424 Japan Tel 0543 47 0112 Fax 0543 48 5271 Distributed by OVERSEAS SUBSIDIARY COMPANIES STAR MICRONICS AME
6. 09100518 connector 530280 ff 93930001 JUMPER WIRE STP123 6 28 PARTS LIST 6 7 Power Supply Unit Except for H K 6 7 1 Circuit Diagram VS 93 821 YELLS SN Hd VINO 9MMWV3 23 082 1119 S 14 Depeau jou ale 1 pue 104 SION 200 0 rl j OOEE Jj OZv 40022 444 L ASE 82 3 69 H OOE STOOL 4 23 27 AOS AN ANA AO Vg ME 104100 AS 9220 VEE O 002 0022 40022 2 Py 1999 E peces HH 01 85 40022 5050 0 05 14 ad 3 ED MS ow Lo sl 6 29 PARTS LIST 6 7 2 Component Layout 2 TIA 25 250V m protection risk CAUTION 4 tire replace with same type ned ratings of fuse 6 30 PARTS LIST 6 7 3 Parts List Power Supply Unit Except for H K 101 08202016 IC REG 75735 1 OSs DB1 1 08990220 prope STACK 039810 4H 08990227 prope STACK 035820 TP RI J 06214721 RESISTOR 4 7 1 R2 06230021 RN RESISTOR 0 22 OHM 3M 1 R3 06201022 RN RESISTOR 1 2W 1 RA _ 230031
7. a MODEO 45V 3 5 oo 50 incl gt 249 24 LoD re SU inco M GND 2 M GND 53 5 7 95 NGA S GND 4 5l SIUE INCS x mila INCS 57 Bypass condensor 3 5 10 J L INC ROM 0 0224 BC Olu 8 6 8 2 C GG PSOE b INBO 10 0 INBI 6 12 SIDE A 5Y R44 1 5K 220 RT 220 PARTS LIST R41 R42 TRZ 2 2K 001740 TRS 22K ASSO CNI HLEM 14S 24V 5 HU CMN k HD CHN E euam 8 HD CMN EE nl 3 HD ene x ES pm PAS RSet L TR20 BA ge Rest L TRIS 5 utis AN d Wi asl ein 4 06 Pr NY 18 Cb TRI6 4 HDT Ra 5 E HD9 7 M GND g THERMISTOR THERMISTOR 45V R22 B R20 jo 8 2K 2 In Ix Xu R5 Sa 2 7 2W 4 7K HLEM I9S R45 3 59 LF CMN LF CMN B AM 158 14 Wy R74 ecg 15 RGS 03 RTS 16 4 10 T 4 73 M GND 65 TIMING SIG I R3 8V 47K 2 FSV 816 TIMING SIG 2 AL HP SIG 12 ii 5 5Y ANA R9 8 GND 254 4 7K E IOK C20 25 016 0 0224 470P 470P R6 2 5V 7 119 PAPER END 191 54 24
8. 09100400 CONNECTOR HLEMI4S 1 Sai 2 00100419 CONNECTOR HLEMI9S 1 Tif CN 00100269 CONNECTOR 5483 03A 1 6111 NOT MOUNTED 057 09100421 CONNECTOR 52065 6645 1 CN8 1 09100337 CONNECTOR DBLC J25SAF 2316 1 09100579 CONNECTOR 0711321 15 1 O CN 09100508 CONNECTOR IL W 24P AD 1 CN10 09100420 CONNECTOR ___1 00100317 CONNECTOR 5483 44 1 001 2 80700140 WIRE 20ULI015BLK110 o 2 00630804 SCREW TR 38 1 FOR 6 19 PARTS LIST 6 5 2 For Parallel Interface 6 5 2 1 Circuit Diagram A CNS OY 5 Ay M5I9538L 57RE40360730B12A 1 R47 4 5 1 5K RESET 3l c23 9 1505 T COMPULSION N 34 4 7 8 2 MATAL 2 5 DINO DATA2 3 DIN 10 4 RIS 7 HDI DATA3 DINZ lu 4 n RI 70 DATA4 5 I MA DIN3 DATAS 5 ated Er 7 RIS E HD4 DATAS 7 F a DINS lis 8 DING 3 821 56 HDE DATAS 9 Lt DIN IK RI3 HD9 PEEL d 00 a HDEN STROBE 1 Wr 2 4 1480 5Y ca 470P I RA3 2 2 1 RD EDO WR BUSY L 10 A 100 ES a ee E SELECT 1 4 9072 PAPER OUT 12 emi m
9. 1 TR4 6 1107227853 TRANSISTOR 25017408 3 167 07009331 TRANSISTOR 2549335 __ 1 8 188 1107113591 TRANSISTOR 2581359 1 1 8 TRO 07308821 TRANSISTOR 250882P 1 8 1107113591 TRANSISTOR 2581359 1 8 TR11 12 07320101 TRANSISTOR 2502010 2 IS 41 TR14 22 07320411 TRANSISTOR 2502041 9 IS 01 3 1108000024 191588 T 3 04 6 1108000044 DIODE 1SRI39 1004T 3 07 08030006 SCHOTTKY Drope EK 03 1 j 06581032 RESIS ARRAY 10 1 8w 8EL 1 06581023 RESIS ARRAY 1 1 84 1 RAS 06584721 RESIS ARRAY 4 7K 0HM 1 88 4EL 1 f RA4 5 06584723 RESIS ARRAY 4 7K OHM 1 8W 8EL 2 6 06584721 RESIS ARRAY 4 7K 0HM 1 88 4EL 1 RA7 06581013 RESIS ARRAY 100 OHM 1 84 4ES 1 Rag 06581032 RESIS ARRAY 10 K OHM 1 88 BEL 1 RA 06581022 RESIS ARRAY 1 1 84 9EL 1 10 06581032 RESIS ARRAY 10 K OHM 1 8W BEL 1 f RI 06051034 RD RESISTOR 10 K 0HM 1 6w4 1 R2 06251034 RN RESISTOR 10 K 0HM 1 6 R3 6 06054725 RESISTOR 4 7 1 6 4 27 8 06052211 RD RESISTOR 220 OHM 1 6W 127 IR 06054725 RD RESISTOR 4 7 1 6W EN R10 11
10. 470 50 6 18 PARTS LIST Main Logic Board Serial Interface 018 05152234 0 022UF 50V 05152212 220 50V C20 05152234 CERA 0 022UF 50V 05154714 470 50V c22 23 C24 25 05151034 0 01UF 50V C26 05152234 0 02202 50V Af C27 05131044 0 1UF 25V C28 05252232 FILM 0 022UF 50V 029 oT M UNTED C30 33 05151015 100 50V C34 05251044 FILM 0 192 50V C35 05034756 CHEM 4 7UF 25 Eu do C36 05151015 100 50V C37 05994791 BACK UP 55854473 1 BCl 6 05131044 0 192 25V 807 05532234 CAPACITOR 0 022UF 25V 1 808 11 05131044 0 1UF 25V 051 3 09090034 SWITCH KSS08 1 3 0554 09090033 DIP SWITCH KSS04 1 1 871 45060201 8077 QMB 11 P 1 j 2 09250037 OSCILLATOR CST9 83MT 1 11 4 09990705 BEADS INDUCTOR 1 8 4 NOT MOUNTED ____ NOT se 05 5 6 09100428 CONNECTOR IMSA921081 036F 2 WITH 09100429
11. Stop ring SEA 1 V lt 2 b o f he Gear Q 0 4 j Gear Gear 4 Assembly 1 Move the carriage to the left end Align the gear wheels so that the cut out section of the drive shaft and one end of the cut out section ofthe timing pulse plate are facing upward as shown in the figure Secure the gears with the stop rings 3 Adjust Column displacement Refer to Section 3 4 SU I 4 7 5 MAINTENANCE AND LUBRICATION 51 Maintenance VERRE 5 1 1 Cleaning E E E E PEE E A E E 1 2 Checks ek 5 2 Lubrication 5 2 1 Type of 5 2 2 Lubrication method 5 2 3 Lubrication locations 5 3 Screw Sealing E MAINTENANCE AND LUBRICATION 5 1 Maintenance Carry out the maintenance control items listed below to maintain the original performance of this printer and prevent trouble from occurring 5 1 1 Cleaning 1 Removal of dirt Clean the dirt with tissure or soft cloth Note Do not use thinners or trichlene ketone base solvents for cleaning as they can damage plastic parts Be careful not to damage electrical parts
12. 6 32 PARTS LIST 6 8 2 Parts List Power Supply Unit For H K 101 08202008 10 8 L4960 1 s 122 __ ___ 08202024 1 1014 08000040 DSMID dP Ds 08030016 SCHOTTKY DIODE ERB84 009 Jif S 08990227 prope STACK 035820 0 1 RI 2 06041031 RD RESISTOR 10 K OHM 1 AM 2 R3 06242031 RN RESISTOR 20 K OHM 1 44 1 1 RA 06245121 RN RESISTOR 5110 OHM 1 44 1 1 ND jeje ___ ___ 05291045 FILM capa 0 1UF 275V Jif NT 2 5 05192224 2200 4001 TE 05054782 CHEM 4700UF 501 c5 05155611 560PF 501 22044 c6 05252222 FILM 2200 501 c7 05154713 470PF 501 cs 05251043 FILM 0 1UF 501 c9 05043385 CHEM 3300UF 351 7 C10 05024781 CHEM 4700UF 161 BEN C11 05152231 0 02202 501 al TT c12 05022271 CHEM 2200 161 222 sw 09030010 SEESAM SWITCH Jof t ___ ____09251106 LINE FILTER Sulov o5050 1 12 09251023 CHOKE COIL SK1585045 300 Jif F1 f 09990021 FUSE EAMK630MA 2507 oif TS F2 3 __ ____09990050 FUSE EAK3 15A 250 Jef 8 80702670 CABLE UNIT 4x100 893001 1 cno
13. 6 2 1 Assembly Drawing 215 MP322S MP323S 6 5 PARTS LIST 6 2 2 Parts List I 5 gt D gt 7 3 REV PARTS NO PARIS Jor REMARKS 1 _______ 89130040 PRINT HEAD 0789010 2 87110190 FRAME UNIT mas 1 3 87111190 DRIVE SHAFT UNIT mP311 1 87111170 DRIVE SHAFT UNIT mp312 1 3 87111200 DRIVE SHAFT UNIT MP323S 1 MP328 So a 1 81210240 ADJUSTING COLLAR 5 80203041 DRIVE SHAFT BEARING MP300 1 TT 6 83100940 DRIVE SHAFT GEAR MP300 1 7 87111182 CARRIAGE UNIT gt MP300 1 1 187111183 CARRIAGE UNIT MP300 1 e _ 82091091 RIBBON SEPARATOR MP300 1 TS 9 1370610 CARRIAGE STAY 1 10 81360580 CARRIAGE STAY 2 MP300 1 11 83200821 ADJUSTING BUSHING MP300 1 TT 12 82500040 WAVE WASHER i 1 13 83400630 ADJUSTING LEVER MP300 1 TS 14 82501000 ADJUST SPRING MP300j 1 N 16 83911210 SHEET 19 87116180 PF ROLLER 0 3245 1 20 _ 83911200 PF ROLLER SHAFT HOLDER MP300 1 21 83100980 PF ROLLER GEAR 3215 1 22 182902130 PLATEN 218 1 MP321 MP328 82902140 PLATEN 228 1
14. Fig 2 3 Print Head Driving Circuit THEORY OF OPERATION 2 2 3 Print Head Temperature Detection Circuit The print head temperature detection circuit protects against damage when the print head heats up abnormally Figure 2 4 shows this circuit The print head has a thermistor to show the temperature of the head solenoids This thermistor 15 an element that converts temperature into voltage Its output voltage is input to an analog pin of the CPU The CPU compares this input voltage against its reference voltage VRFE to evaluate the temperature of the head solenoids and carries out one of the following operations depending on the temperature 1 T lt 110 C Bi directional printing 2 110 C T Stop the printing operation and turn on the alarm lalmp When the thermistor s temperature falls below 110 C bi directional printing is resumed Thermister Fig 2 4 Print Head Temperature Detection Circuit 2 5 THEORY OF OPERATION 2 2 4 Carriage Motor Driving Circuit This printer employs a DC motor as the carriage motor The DC motor has two operating modes 1 Drive Voltage is applied across the motor terminals to make the moter turn 2 Brake The motor pins are shorted together to configure the motor as an electric generator In this configuration the motor acts as a dynamic brake that generates torque working against the rotation of the motor and the motor stops rapidly The gate array selects between t
15. 63 Iz 19 54 3 55 IT X TALI 2 90 841 9 83 6 13 5 CR MOTOR MOTOR CR MOTOR ER MOTOR PARTS LIST I 315 7 100X4 1 1 12 416 811 151588 ae INAO 8330 45V sites D IMAI QMBIIIP 12000010 OUTBI z 28 LC920iIB SP300 A CNIO B8B PH K 54 R36 4 7K Pan 77 ON LINE SW 2 1 R35 C25 1 4 7 0 0lu 2 78 FEED SW 6 usa es 4 7K n zi 79 POWER LAMP 3 ALARM LAMP 4 E ON LINE LAMP lt 5 GND 8 Es 165 mim 1506 hr 5 22013 19 5y A16 RI 10 5 AIT 5Y I 0 Cas A8 N ad 21 aa al 26 1414 27 5 151 Note Note 2 Note 2 c min BI 1A JP2 gt The unit of resistor and resistor array is indication of wattage means I 6W I 8W respectively The unit of capacitor and capacitor arroy is and no indication of voltage means in bracket depend on the printer type if if is installed or not on the board Refer to parts list 6 14 SIDE D PARTS LIST
16. If the return printing is to the left of the going printing move the terminal board 3 in direction of the white arrow D Tighten the two terminal board installation screws 2 Print and check the size of the column displacement If it does not satisfy the requirement repeat this procedure from Step 2 If you can not get the print column displacement adjusted correctly use Adjustment B in 3 4 2 When Adjustment 1 complete install the printer mechanism on the main unit by reversing the procedure with which you removed it Going Printing Return Printing Figure 3 7 Column Displacement Adjustment Figure 3 8 Column Displacement Adjustment A 3 5 ADJUSTMENT 3 4 2 Adjustment B 1 Remove the stop ring 3 then remove the idler gear 5 2 Turn the motor gear 6 one tooth then install the idler gear 8 and the stop ring 2 This operation changes the relative the positions of the idler gear 5 and the motor gear 6 the relation between the A on the idler gear and the U on the motor gear as Figure 3 9 shows The A and U marks were not always identical at the factory If the return printing starts at the position right to the going printing start position turn the motor gear one tooth clockwise If the return printing starts at the position left to the going printing start position turn the motor gear one tooth counterclockwise However do not make extreme changes to the gear setting Referto to S
17. US U S A EC EC Unied Kingdom HK Hong Kong The seal number of ROM is described in this column The mark of seal number is variable depending on the software version 7 RANK Parts marked 5 are service parts Service parts are recommended for maintenance 6 1 Printer Assembly 6 1 6 7 Power Supply Unit Except for H K 6 29 6 1 1 Assembly Drawing 6 1 6 7 1 Circuit Diagram 6 29 6 1 2 Parts List 6 3 6 7 2 Component List 6 30 62 Printer Mechanism 6 5 673 Parts EISE sao 6 31 6 1 1 Assembly Drawing 6 5 6 8 Power Supply Unit For H K 6 32 622 Parts List 6 6 6 8 1 Circuit Diagram 6 32 6 3 Sub assembly 6 8 582 Parts List osito 6 33 6 3 1 Upper Case Untt 6 8 6 9 Terminal Board 6 34 6 3 2 Lower Case Unit 6 9 6 9 1 Circuit Diagram 6 34 6 4 Wiring Schematic of Printer 6 10 555 E LIST ee 5 6 4 1 For Serial Interface 6 10 6 4 2 For Parallel Interface 6 11 6 10 Home Position Detector Board 6 37 6 10 1 Circuit Diagram 6 37 a 2 6 10 2 Component Layout 6 37 5 Interface 6 12 6
18. also be removed with the high voltage circuit 3 of the power supply unit kept pulled upwards Inspect e F1 1 F2 2 If a fuse is defective replace with the correct type of fuse as listed below 120V STT1A 5TT3A EAWK 630MA EAK3 15A EAWK 630MA STT3A Note the new fuse blows inspect the circuit 4 3 PARTS REPLACEMENT 4 4 4 7 Print Head 1 Turn off the power switch disconnect the power cord from the wall outlet Remove e Upper case unit not shown in the figure according to the procedure described in Section 4 Three bush rivets 1 e Terminal PCB cover 2 Two tapping screws 3 Head cable 4 e Screw 5 e Print head 6 WARNING The print head becomes hot after printing so wait for it to cool before removing it Adjust e Gap between print head and platen Refer to Section 3 2 Drive Shaft Unit Remove e Upper case unit according to the procedure described in Section 4 1 Print head according to the procedure described in Section 4 7 e Nut 1 Ajusting lever 2 Screw e Ajusting bushing 4 Rotate the adjusting bushing by 90 degrees and remove protruding portion from the frame e Carriage stay 1 5 Wave washer 6 e Stop ring 7 Gear 9 49 3 42 e Carriage stay 2 3 e Stop ring SE4 e Carriage unit 15 Loosen the screw 19 with the hexagonal wrench Remove e Ajusting collar 1 Drive shaft bearing
19. 80702820 CABLE UNIT 4 60 3 5 312 1 09100036 CONNECTOR 52827 44 Tol JP1 2 80700340 WIRE 2001101581 95 Jef JP3 80700650 wIRE 20ULI015WHTIZOTT Jif j apa s80700640 WIRE 20ULI0158LKI20TT Jif J1 2 93930006 JUMPER WIRE 5712 2 om 09240510 TRANSFORMER 220 SP300 09110091 SET 5 300 1 82020570 POWER CORD SP321S 1 04991220 CORD BUSHING 58504 1 04991204 FASTENER 1185 1 82090350 TRANSISTOR HOLDER PLATE R 10 1 82911071 RADIATION PLATE 92312 1 101903035 SCREW TR 3 10 FL 1 109990023 Fuse HOLDER UF 0033 oal 109991386 HEAT SHRINK TUBE F2 3 0 1 80700640 WIRE 20ULI0158LK120TT 1 80 05 50 CABLE UNIT OIXIOOTT A 6 33 PARTS LIST 6 9 Terminal Board 6 9 1 Circuit Diagram HD CMN1 HD CMN2 HO CMN3 HD1 HD2 HD3 4 HD5 HD6 HD8 HD9 THERMISTOR THERMISTOR CR MOTOR CR MOTOR TIMING 5162 TIMING 5161 tay HP SIG GND 21 LF 2 LE cC LF A LF CMNA LF CMNB Note 1 1 unit on resistor s Note 2 The components CN1 CN3 d d 5 4 HD CMN1 d 1 HD CMN2 8 11 HD CMN3 3i 0 HD1 1 18 HD2 131 H
20. Drive shaft unit Adjust e Column displacement Refer to Section 3 4 PARTS REPLACEMENT 4 9 Terminal Board Unit la Remove e Printer mechanism according to the procedure described Section 4 2 The ten soldered lead wires 1 with the soldering iron Two screws 2 Terminal board unit 3 2 Adjust Column displacement Refer to Section 3 4 4 10 Carriage Motor Unit 1 Printer mechanism according to the procedure described in Section 4 2 two soldered lead wires 1 with the soldering iron black red Two screws 2 Carriage motor unit 3 2 Adjust Printing speed Refer to Section 3 3 Column displacement Refer to Section 3 4 4 5 PARTS REPLACEMENT 4 11 Paper Feed Motor Unit Remove Printer mechanism according to the procedure described in Section 4 2 e Cut the wire band for fixing the lead wires The five soldered lead wires 0 with the soldering iron red brown black yellow orange e Two screws 2 e Paper feed motor unit 3 4 12 Home Position Detector 4 6 Board Unit Remove e Printer mechanism according to the procedure described in Section 4 2 The three soldered lead wires 1 with the soldering iron yellow orange green e Screw 2 Home position detector board unit 3 PARTS REPLACEMENT 4 13 Gears la Remove Upper case unit according to the procedure de scribed in Section 4 1
21. reduces the gap and dropping the inserted shaft in the opposite direction increases the gap 3 After the adjustment set the adjustment lever 5 to the second stage position as shown in Figure 3 2 and tighten the nut 1 4 Install the new ribbon Separator Note When tightening the nut make sure that the shaft inserted into the 2 mm diameter hole 3 is held steady so that the carriage stay 2 and adjustment lever 5 does not turn Figure 3 5 Gap Adjustment 3 3 ADJUSTMENT 3 3 Adjusting the Print Speed The printing speed 18 critical to ensure maximum reliability of the printer If the printing 1s too fast the print head cannot keep up and the wires get caught on the ribbon 1 2 3 Remove the printer mechanism according to the procedure described in Section 4 2 Leave the ribbon cartridge installed To disable the cover open detector connect Pins 1 and 2 of connector 1 together for example by putting a clip between them Apply the voltages shown below to the pins of printer mechanism connector CN2 2 The carriage motor turns and the carriage moves left or right Pin No 7 or No 8 24 VDC Pin No 9 or No 10 Ground Pin No 12 5 VDC Pin No 18 Ground The printing speed 15 calculated from the timing signal frequency Connect the measurement terminals of the frequency counter to connector CN2 2 as indicated below and measure the timing signal frequency P
22. 10 3 Parts List 6 37 6 5 1 1 Circuit Diagram 6 12 6 5 1 Component Layout 6 16 6 11 8422 Interface Board BD320K option 6 38 6 5 1 3 Parts List 6 17 6 11 1 Circuit Diagram 6 38 6 5 2 For Parallel Interface 6 20 6 11 2 Component Layout 6 38 6 5 2 1 Circuit Diagram 6 20 5 11 3 Parts List 6 38 22 I Layout oe 6 12 Current Loop Board BD320L option 6 39 6 12 1 Circuit Diagram 6 39 6 6 Control Panel Board 6 28 6 12 2 Component Layout 6 39 6 6 1 Circuit Diagram 6 28 6 12 3 Parts List 6 39 6 6 2 Component Layout 6 28 6 6 3 Parts 164 6 28 PARTS LIST 6 1 Printer Assembly 6 1 1 Assembly Drawing A SP321SD SP322SD SP323SD D o 6 1 PARTS LIST B SP321SC SP322SC SP323SC gt E 6 2 PARTS LIST 6 1 2 Parts List Printer Assembly 1 89113120 PRINTER MECHANISM MP3215 24 1 5322 95 89113140 PRINTER ME
23. 2 HD 5 4 3 HD 6 5 DATA 4 HD CMNI 5 5 DATA 5 HD 8 B 7 6 a HD CMN T 8 7 HD CMN3 3 9 DATA 8 TH 9 9 n BUSY TH 2 P END HO 5 12 3 SLET HD 3 13 4 15 N C 7 lla GND 7 F GNE 8 5Y 9 30 GND RESET 32 ERR 53 GND 54 COMPULSION SW 35 N C 56 SEL IN LF 1 i LF 2 E CN11 er LF CMNA 5 M GNE LF CMNB 6 L 51 MOTOR 7 GND MOTOR 8 MOTOR 9 _MOTOR GND T 5 2 516 3 CNE VALIDATION SIG 14 I BLACK MARK SENSOR 15 2 TRO TIMING SIG 16 3 RXD TIMING 162 7 5 RTS S GND 8 5 CTS PAPER END I 9 6 N C Y GND 8 9 DP F OP IZF2 1 RCH N C 13 END 14 FAULT EN 15 MULTI PRINTER TXD a B MULTI FR NTER DTR 37 5 4 3 ET 2 MOTOR 5 21 22 N C FOR AUTO CUTTER 23 OP I F 6 24 OR I F T 25 PER PHERAL EXT 2 24 5 24V 4 CN10 PERIPHERAL EXT2 5 PERIPHERAL SWI 54 2 ON LINE SW 6 FEED SW SW 3 POWER LAMP CN3 4 ALARM LAMP E 5 GN LINE LAMP are GND ONS I REWNOERI GND 2 EEE E BLACK MARK SENSOR 3 3 F GND i FOR REWINDER FCR BLAZK MARK SENSOR MAIN LOGIC BOARD 6 11 PRINTER MECHANISM oo PAPER OUT SENSOR PARTS LIST 6 5 Main Logic Board 6 5 1 Serial Interface 6 5 1 1 Circu
24. 3 4 2 Adjustment 3 6 ADJUSTMENT 3 1 Tools and Measuring Instruments 1 The adjustments in Chapter 3 and the parts replacements in Chapter 4 require the tools and measuring instruments shown in Table 3 1 and Table 3 2 2 After completing the adjustments in Chapter 3 and the parts replacements in Chapter 4 apply locktite to any screws or nuts Refer to Figure 5 1 and Figure 5 2 Table 3 1 Tool List Phillips screwdriver for M2 to M4 screws Flat blade screwdriver for removing stop ring cating pies Thickness gauge 04 012220 Table 3 2 Measurement Instruments Frequency counter For measuring the printing speed 3 1 ADJUSTMENT 3 2 Adjusting the Gap between the Print Head and the Platen This adjustment secures the optimum print quality 3 2 1 Measuring the Gap between the Print Head and the Platen 1 2 Remove the printer mechanism according to the procedure described Section 4 2 Set the adjustment lever 2 to the seventh stage position Refer to figures 3 2 and 3 3 In order to facilitate removal of the ribbon separator 1 push the adjustment lever 2 in the direction opposite to that of the platen 5 Push the sections indicated by arrows on both sides of the ribbon separator 1 alternately toward the inside to remove the ribbon separator from the catches and then pull it up and out Since the ribbon separator becomes bent upon removal do not use again a
25. EXT F GND 16 SWI CN3 5483 03A apasi 5 2 PAPER END 5161 pi GHD PARTS LIST PARTS LIST 6 5 2 2 Component Layout 6 24 PARTS LIST 6 5 2 3 Parts List Main Logic Board Parallel Interface Ici 08250009 cpus IC2 08210116 TTL IC 741506 FLAT TYPE a 1 08210144 TTL IC 74LSO6FP TL 1 08210142 TTL IC 74LS05FP TL ica 08240019 GATE ARRAY LC920118 SP300 1 165 ______ 08200109 IC RESET M51953BL_ 166 2 7 08222026 EPROM 27256 1505 1 SP3P S NOTE 1 5 09110024 IC SOCKET ICS 28 2T 1 SRAM 6264FP 100NS EL al Ts enos 1 08230058 74HCOOAF TLI ___ S Icio 09110077 10 SOCKET ICS 32 2T _ REG 08202011 IC REG UPC7824 C 1 S 2 07650029 TRANSISTOR ARRAY mp4001 1 07650056 TRANSISTOR ARRAY UPA1428AH 1 TR2 07227853 TRANSISTOR 251706 Jol 14 07009502 TRANSISTOR 254950 Sol 1 184 6 07227853 TRANSISTOR 25 174058 J3 l 187 07009331 TRANSISTOR 2549335 Sol NS __ _ _ __________ TRO __ ___ 07308821 TRANSISTOR 25088 clc TRI1 12 07320101 TRANSISTOR 2502010 2 SI 1814 22 07
26. US PN Le1 8M SP300 1 FOR uS gt _ 09110129 CORD SET EC PN 5 30011 1 FOR EC j 09110067 corD SET UK PN LC 1 FOR UK 09240880 TRANSFORMER 1207 2300 US2 1 FOR us L 09240890 TRANSFORMER 2201 S300 Ecz 1 FOR _ FOR EC 230V UK 230v L esz4oso a 09990023 FUSE HOLDER UF 0033 1 FOR FI F2 80752091 POWER SUPPLY BOARD 5 1 j o 82020570 POWER CORD COVER 23215 1 _ _ 09990708 FERRITE CORE 0 166 1 2304 0 2304 Twine 01 1 ror us 80701510 WIRE 1801 1019581 067 FOR UK 240V 6 31 PARTS LIST 6 8 Power Supply Unit For H K 6 8 1 iagram ircuit D m IIND pps e NE 3022 279 AS 1 arto 1 El el 1 X Mp T vu UTE S 2 va 500 ECE oy ASE INYDOEE 63 XI Ab T UNO AG2 Yusta 400 E OOE GvOSEST YS INO 21 Px a 1 e3JVINHOJSNVOL ee MER 05050 0 11 M es U LU namani rau 2 1 tr E mah aw a ee ns OH PRY HA AS
27. head consists of 9 needle wires and 9 print solenoids The following is an explanation of the operation of a single needle wire during printing 1 When the print solenoid is energized the clapper is attracted by the iron core and the needle wire is driven toward the platen 2 This needle wire hits the platen via the ink ribbon and paper and a single dot is printed on the paper 3 When the print solenoid is de energized the needle wire is returned to its original position by rebound energy and by the force of the spring and clapper holder leaf spring Paper Spring Ink Ribbon Platen Needle Wire t Stoppar Guide Subguide Clapper Holder Iron Core Clapper Bobbin Print Solenoide Fig 2 13 Outline of Print Head Mechanism THEORY OF OPERATION 2 4 2 Print Head Carriage Mechanism This print head carriage mechanism consists mainly of the carriage carriage motor gear train home position detector and timing detectors When the carriage motor rotates the drive shaft cylindrical cam is rotated by the reduction gear The print head supported by the carriage moves right and left The print head position is determined by timing signals generated by the timing detectors and the home position signal generated by the home position detector Print Head Home Position Detector Carriage Drive Shaft Timing Detector Reduction Gear Train Carriage Motor Fig 2 14 Print
28. is applied to parts so that the screws in the printer will not come loose from vibration during shipment When carrying out replacement of parts apply sealant to the following screws in accordance with Figure 5 1 and 5 2 PE motor plate retemion sereus plate retention sam E LLL Carriage motor retention screws 2 5 3 MAINTENANCE AND LUBRICATION Fig 5 1 Lubrication and screw sealing positions 5 4 MAINTENANCE AND LUBRICATION Figure 5 2 Screw sealing positions 5 5 6 PARTS LIST HOW TO USE PARTS LIST 1 DRWG NO This column shows the drawing number of the illustration 2 REVISED EDITION MARK This column shows a revision number Part that have been added in the revised edition are indicated with Part that have been abolished in the revised edition are indicated with 1 First edition Second edition First edition Second editon 3 PARTS NO Parts numbers must be indicated when ordering replacement parts Parts described as NPN have no parts number and are not in stock 1 e unavailable 4 PARTS NAME Parts names must be indicated when ordering replacement parts 5 QTY This column shows the number of the part used indicated in the figure 6 REMARKS Where there are differences in the specifications of the fuse destinations etc the differences are described in words or indicated by two letters
29. 06053324 RD RESISTOR 3 3 0 1 6W TESE NOT MOUNTED a DO Note1 After replaceing IC7 turn the power ON while depressing the FEED switch and ON LINE switch on the control panel to clear the data buffer PARTS LIST Main Logic Board Serial Interface RWG NO REV PARTS NO PARTS NAME 0 REMARKS R14 06054725 RD RESISTOR 4 7 1 6W NEN R15 06054734 RD RESISTOR 47 1 6W DO NOT MOUNTED C R16 06056834 RD RESISTOR 68 K OHM 1 6W R17 4 Ra f p M5 M6 Ba TT MEE R18 19 06054734 RD RESISTOR 47 K OHM 1 64 2 o o R20 21 06054725 RD RESISTOR 4 7 K OHM 1 6N 2 R22 06058224 RESISTOR 8 2 K OHM 1 6N Jif R23 6054725 RD RESISTOR 4 7 K OHM 1 ow Jif 824 06058224 RESISTOR 8 2 K OHM 1 ow 1 R25 06054725 RESISTOR 4 7 K OHM 1 ow Jif R26 06058224 RD RESISTOR 8 2 K OHM 176w 1 12 R27 06054725 RD RESISTOR 4 7 K OHM 176w 1 1 R28 06058224 RD RESISTOR 8 2 K OHM 1 ow 1 1 R29 06054725 RD RESISTOR 4 7 K OHM 1 64 1 1 R30 06058224 RD RESISTOR 8 2 K OHM 1 ow Jif R31 32 06054725 RESISTOR 4 7 K OHM 1 ow 2 1 R33 06053314 RD RESISTOR 330 OHM 1 60 1 R34 39 06054725 RD RESISTOR 4 7 K OHM 1 ow 6 RA0 41 06051034 RD RESISTOR 10 K OHM 1 64 2 1 8421 06052224 RD RESISTOR 2 2 K OHM
30. 1 R93 06051034 RD RESISTOR 10 K OHM 1 6H 11 TT R94 06051514 RESISTOR 150 1 6N 11 TT gt 9 gt MOUNTED CA3 05651012 ARRAY 100PF 50V BEL Jif TT era 05252232 FILM 0 022UF 50 2114 6 26 PARTS LIST Main Logic Board Parallel Interface c3 05131044 0 1UF 25 02 65 8 05151015 100PF 501 Al 2 912111121 M NTED 02 C13 __ ____05151033 0 010 501 22212111 614 15 05154714 470 501 212 Ci 11121 MOUNTED C17 18 05152234 0 022UF 501 210 C19 05154714 470PF 501 ME DE C _ 500901121 NIT MUNTED C21 22 05151034 0 010 501 C C23 05131044 0 1UF 25 pup C24 05152234 0 022UF 501 pup c25 05154714 470PF 501 ME UN IE C26 05131044 CAPA 0 10 25 E ez oT MoE 28 31 05151015 100 501 Al o o C32 05251044 FILM 0 1UF 501 pup TEE 05151015 CERA 100PF 50V 1 ca NOT MOUNTED 05994791 05994791 BACK UP CAPA 55854473 c36 05034756 CHEM 4 7UF 25V 637 38 05131044
31. 1 80993161 PAPER HOLDER 24 83120590 SPROCKET WHEEL 3215 2 25 83911251 PAPER GUIDE R 5 3245 1 26 83911261 PAPER GUIDE SP321S 1 27 _ 83400621 LOCK LEVER mol 2 S 28 81380610 GUIDE SHAFT 32145 1 29 81360840 SPROCKET SHAFT 2 3215 1 30 83911271 SPROCKET SHAFT HOLDER MP300 2 31 83100990 GEaR 16 40 0 5 3245 1 33 87112500 PF MOTOR PLATE ASSY 3 3215 1 34 1 87112490 PAPER FEED MOTOR ASSY 3215 1 TS 35 h 36 83101020 GEAR 16x48x0 5 1371 83101030 GEAR 12x49x0 5 38 83100960 GEAR 28x0 5 MP300 1 39 83101010 BEVEL GEAR 1200 5 MP300 1 3 40 87119170 CASSETTE RATCHET UNIT MP300 2 5 41 82901161 GEAR ANGLE O 06i 87117180 DETECTOR BOARD UNIT HP MP300 1 MP322 TS 45 00330404 scREW TF 3 4 N WN 00717144 SCREW 1 1 4 PARTS LIST Printer Mechanism 47 00820404 screw TR 2 4 BEE s 48 01902612 SCREM 2 6 16 PT de TS 49 00630404 SCREM TR 34 ___ C s 50 o1903048 SCREM TR 3 5 WF 2 S 51 02020801 HEXAGON NUT NH3 2 1 TS 52 04020010 RING 52 0 11 TS 53 104020015 STOP RING 3 01 1541 04020016 RING SE4 0 6
32. 1 6N Jif 843 06052234 RD RESISTOR 22 K OHM 176w Jif 844 06051525 RD RESISTOR 1 5 K OHM 1 ow Jif 1 2 845 06051034 RD RESISTOR 10 K OHM 1 66 1 1 846 06053324 RD RESISTOR 3 3 K OHM 1 ow Jif RA7 48 06051034 RESISTOR 10 K OHM 1 6 RA9 06053334 RD RESISTOR 33 K OHM 1 68 850 oo R51 52 06053314 RD RESISTOR 330 OHM 1 60 2 8 21 NOT MUNED R54 06051034 RD RESISTOR 10 K OHM 1 64 858 5621 R57 06200271 RN RESISTOR 2 7 OHM 2w 2 R58 59 06051034 RD RESISTOR 10 K OHM 1 6 1 2 860 06056824 RESISTOR 6 8 K OHM 1 68 R61 06051034 RESISTOR 10 K OHM 1 6H R62 06051514 RD RESISTOR 150 1 6N 11 S R63 64 106051025 RD RESISTOR 1 K OHM 1 6N 1 2 TT R65 73 06053314 RD RESISTOR 330 1 6N 9 1 R74 75 06051025 RD RESISTOR 1 K OHM 1 6N 2 S R76 77 06051014 RESISTOR 100 OHM 1 6N 2 S 1 2 CA3 05652212 ARRAY 220PF 50V BEL Jif o _ 1 c2 05252232 FILM 0 02202 50 C3 6 05022264 CHEM 220 16V c7 05152212 220PF 50 05151033 0 010 50 _ C9 10 05151015 100PF 50 21 10 1121 C15 16 05154714
33. 2 S 27 01903085 SCREW 3 7 ws 2 Ss 28 01903077 SCREW 3 5 CT FL 3 1 01903069 5 3 5 29 00930803 SCREM 3 8 PT 7 Ss 30 1903026 TR 3 5 TiS S 31 82011320 BOARD CHASSIS 5 32145 1 32 80703740 CABLE UNIT BX215CC 3 5 30050 1 _ 33 80980980 INK RIBBON CARTRIDGE RC300P 1 80981610 INK RIBBON CARTRIDGE RC300B 1 BLACK OPTION 80982440 INK RIBBON CARTRIDGE RC300D 1 BLACK OPTION 34 87219160 CONTROL BOARD BD320K 1 RS 422A OPTION ___ 1 87219161 CONTROL BOARD BD320K 1 RS 422A OPTION 87219170 CONTROL BOARD BD320L 1 CURRENT LOOP OPTION 35 83911720 CONNECTOR COVER SP312 1 fo 36 83903490 PLATEN SP321S a _ 37 1 83024990 PAPER HOLDER 23215 1 TT 1 83024991 PAPER HOLDER 5 3215 1 38 83025000 PAPER HOLDER COVER SP321S 39 83911451 HEAD coveR 8901D 1 FOREC 6 3 PARTS LIST Printer Assembly DRWG NO REV PARTS NO PARTS JQ TY REMARKS RANK H FOR EC 04020016 STOP RING SE4 0 2 SP321 SP323 1 09990723 FERRITE CORE TFC 23 11 14 1 ACCESSARY 04991204 FASTENER T185 ACCESSARY 6 4 PARTS LIST 6 2 Printer Mechanism
34. 320411 TRANSISTOR 2502041 Jof 00 0 orone 13881 a 1024 08000044 188139 10041 1301 Ds 08030006 SCHOTTKY DIODE ER 03 06581032 RESIS ARRAY 10 K OHM 1 8w set 1 RA2 06584723 RESIS ARRAY 4 7K OHM 1 808 set 1 RAS 06581823 RESIS ARRAY 1 8K OHM 1 808 1 Ra4 06581023 RESIS ARRAY 1 K OHM 1 8 4EL 1 RAS 06584721 RESIS ARRAY 4 7K OHM 1 808 4EL 1 RAG 1106584723 RESIS ARRAY 4 7K OHM 1 808 BEL 1 RA7 06581032 RESIS ARRAY 10 K OHM 1 608 set 1 Rag 06581022 RESIS ARRAY 1 K OHM 1 8w 9EL 1 RA9 06581032 RESIS ARRAY 10 K OHM 1 8w set 1 RI 3 06054725 RD RESISTOR 4 7 K OHM 1 6 __ 3 R4 06251034 RN RESISTOR 10 K OHM 1 6 R5 6 06051014 RD RESISTOR 100 OHM 1 6H R7 06054725 RD RESISTOR 4 7 K OHM 1 6H RI2 06051025 RD RESISTOR 1 Kom 1 6H R13 06051014 RD RESISTOR 100 OHM 1 6H Note1 After replaceing IC7 turn the power ON while depressing the FEED switch and ON LINE switch on the control panel to clear the data buffer N 9 6 25 PARTS LIST Main Logic Board Parallel Interface RWG NO REV PARTS NO PARTS NAME 0 REMARKS 814 21 06054725 RD RESISTOR 4 7 1 6W NEN C R22 R23 24 R25 R26 R27 ____ _____________ R34 p EA AA AE p R35
35. 36 06054725 RESISTOR 4 7 K OHM 1 68 R37 06053314 RD RESISTOR 330 OHM 1 6w_ EA A EA NE NEN NOI MOUNTED NOT USED NOI MOUNTED R28 R29 1 22 22 R38 42 R43 44 R45 R46 847 R48 R49 R50 R51 R52 06054725 RD RESISTOR 4 7 K OHM 176w R53 06058224 RD RESISTOR 8 2 176w R54 06054725 RESISTOR 4 7 K OHM 1 R55 06058224 RD RESISTOR 8 2 K OHM 1 6 R56 06054725 RD RESISTOR 4 7 K OHM 1 6 R57 06058224 RESISTOR 8 2 K OHM 1 6 R58 06054725 RD RESISTOR 4 7 K OHM 1 6 3 11 R59 06058224 RD RESISTOR 8 2 K OHM 1 68 Jil R60 62 06054725 RD RESISTOR 4 7 K OHM 1 68 3 R63 1006051034 RESISTOR 10 K OHM 1 6H 864 06056824 RESISTOR 6 8 K OHM 1 68 R65 68 06051014 RESISTOR 100 1 6N 14 TT R69 06200271 RN RESISTOR 2 7 OHM 2W 2 R70 06051034 RESISTOR 10 K OHM Jil ___ __ R71 06053334 RD RESISTOR 33 K OHM 1 6N R2 S R73 06051034 RD RESISTOR 10 K OHM 1 6 __ 1 3 874 06053314 RESISTOR 330 OHM 1 6N 1 __ __ 875 06051034 RESISTOR 10 K OHM 1 6H 876 78 R79 06053314 RESISTOR 330 OHM 1 6N R80 83 06051025 RD RESISTOR 1 K OHM 1 6N 4 TT R84 92 06053314 RD RESISTOR 330 1 6N 9
36. 3UF 50V 1 FILM 0 033UF 50V La Ps1 08300107 PHOTO INTERRUPTER 081004 8 oif 252 _____08300107 PHOTO INTERRUPTER ON1004 R 1 1 08300162 PHOTO INTERRUPTER CNAI501K 1 veR 2 00100383 CONNECTOR HLEMI4R 1 1 cena 09100413 CONNECTOR HLEMI9R 1 Til CN 09100414 CONNECTOR HBLB14S 10 1 09100270 CONNECTOR 5483 04 1 09990706 BEADS INDUCTOR B 01AT _ 6 36 PARTS LIST 6 10 Home Position Detector Board 6 10 1 Circuit Diagram 55 RI HP SIG PSI ON 1004 GND O 6 10 2 Component Layout 6 10 3 Parts List 06052211 RD RESISTOR 220 1 6H Ps1 08300107 PHOTO INTERRUPTER ON1004 R 80701080 WIRE 26ULI571GRNO30 1 SP321 SP323 80700620 WIRE 26UL1571GRN050 1 5 322 80701070 WIRE 26UL15710RG045 1 5 321 5 323 80700580 WIRE 26UL15710RG050 00700590 WIRE 26UL1571YEL065 6 37 PARTS LIST 6 11 RS422 Interface Board BD320K option 6 11 1 Circuit Diagram RD RD RXD ESA CTS CSi 501 TXD 50 DTR RS 9 Y GND Ver 1 6 11 3 Parts List DRWG NO REV PARTS PARTS NAME 5 R 08200131 IC I F MC34051P IN 7484 05532234 CAPACITOR 0 022UF 25V
37. CHANISM MP3225 24 1 52322 95 89113160 PRINTER MECHANISM MP3235 24 1 52323 695 2 87211060 LOWER CASE UNIT 5 3215 1 5 3 82011310 CHASSIS 5 32145 1 1 8 1 FOR 2201 1 1 FOR FC 230V CO CO IN umm ead N 87213110 POWER SUPPLY UNIT SP321S 240UK 1 FOR UK 240V 87213240 POWER SUPPLY UNIT SPS20 230UK FOR UK 230V gt O1 CO INe JO EN E E E E 87215040 PLATE UNIT SP321S 1 SERIAL INTERFACE 87215050 PLATE UNIT SP321SC 1 PARALLEL INTERFACE 80703940 CABLE UNIT 14 185 SP321S 1 8 _____ 80703950 CABLE UNIT 19 185 SP321S 1 TS 80200430 RUBBER FOOT swoja S 82200270 WASHER 3 1X13 8340 4 S 182501320 GROUND SPRING SP321S 2 a 87210110 UPPER CASE UNIT SP321S 1 US HK 5 187210130 UPPER CASE UNIT SP321S 1 EC UK S 17 187217060 COVER UNIT SP32IS 1 5 18 04020010 stop RING SE2 0 o 4 s 20 1100930403 3 4 CT 2 S 21 01903018 SCREW TR 3 6 WS WF 1 EXCEPT FOR HK 5 22 00930603 36217 3 S 23 01903060 6 TAT 3 Je TS 24 01914003 SCREW TR 4 10 WS WF 2 5 25 001903068 6 3 10 PT
38. Conversely parallel data received by the CPU 1 converted there into serial data and output to the TXD terminal via 129 The CTS terminal is hardware connected not software connected This signal is not checked CNS T RTS 5V 10V V PG DC Convertor 10V 10V y DC DC Convertor C2 TXD e Pn x gt uie eis DTR R CH 235 24 1 IC9 Te 71081 Gate Array WR Fig 2 2 A Serial Interface 2 2 2 2 1 2 Parallel Interface Communications between the host computer and this printer are facilitated via parallel connectors This section explains the handshake of this interface The data input circuit of this interface 1s shown below oder D YI Fig 2 2 B Parallel Interface The following is an explanation of this handshake 1 When the BUSY signal is LOW Ready the host computer outputs 8 bit data 1 through 8 to the connector CNS Pin 1 carries the STROBE pulse signal from the host computer to the printer This signal is normally held HIGH by the host computer When the host computer has data ready for the printer it sets this signal to LOW for at least 0 5 us 2 The gate array of the main logic board reads data 1 through 8 at the time of STROBE signal fall and then turns the IOO and signals to low 3 When the IOO signal of the gate arr
39. D3 2 13 HDA 121 19 HDS 1s HD6 14 110 HD 6 tol gt HD9 9 114 THERMISTOR m THERMISTOR e e CN2 4 E 2 2 IL Sw wi BLACK WIRE 5 RED WIRE 9 9 11 1 sw CARR AGE 1 2 01637 pa 9 16 RANG IRE it Mud YELLOW WIRE Lo 131 0 s s m adm _ 5 v 450 1 C3198 7071 PS1 ON 1004 R 1 GP1S23 HOME POSITION DETECTOR BOARD PAPER FEED MOTOR GREEN WIRE sal CUT w a eee m ee ee r ee Sw YELLOW WIRE SA O O ORANGE WIRE O BROWN WIRE ab 0 RED WIRE gt RED w IRE n 6 34 and no in bracket are not Indication of wattage 1 4w resepectively installed the board PARTS LIST 6 9 2 Component List Ver 1 qe 025121 8 3 J d Ver 2 6 35 PARTS LIST 6 9 3 Parts List Terminal Board DRWG NO REV PARTS PARTS REMARKS 1 1 06242038 RN RESISTOR 20 K OHM 1 4W H m NOT USED VERI VER 2 po h h H 20 m 1 FILM 0 03
40. DOT MATRIX PRINTER 205 SERIES TECHNICAL MANUAL SECOND EDITION 5 Chapter 1 General Specifications Chapter 2 Theory of Operation Chapter 3 Adjustments Chapter 4 Parts Replacement Chapter 5 Maintenance and Lubrication Chapter 6 Parts List e First edition March 1993 Second edition March 1997 NOTICE rights reserved Reproduction of any part of this manual in any form whatsoever without STAR s express permission is forbidden The contents of this manual are subject to change without notice 9 Allefforts have been made to ensure the accuracy of the contents of this manual at the time of going to press However should any errors be detected STAR would greatly appreciate being informed of them The above notwithstanding STAR can assume no responsibility for any errors in this manual Copyright 1993 Star Micronics Co Ltd a e a N 1 GENERAL DESCRIPTION 1 1 General descremada tienen uu 1 1 1 2 Model name notation ii 1 1 1 3 Instructions apply models J 1 2 GENERAL DESCRIPTION 1 1 General description This manual describes the SP320S series dot matrix printers listed in section 1 3 The manual includes sections on principles of operation adjustments part replacement maintenance and lubrication as well as a lis
41. E 34 s CR MOTOR s CR MOTOR E 220 _1 CR MOTOR C5 8 85 7 i CR MOTOR TMP90C84I PARTS LIST PARTS LIST A CNIO ES 5 5 238 4 7 R36 77 ON LINE SW 2 846 C22 INAO l doy 4 7K O O01n 2 78 FEEDSW 6 sar AMy INAI 4 7 0 01u 5V 4 7 73 DI 151588 R37 PAN BZ 7 INA POWER LAMP JE OUTBI ALARM LAMP 4 lt ON LINE LAMP 5 acta 24 GND C3 acto 15806 3 ACT EP 93 59 05 Vas LC920lIB SP300 R93 AIS 5 54 Ag y uf se sf o o loo E 6264 100 51832 120 Note gt The unit of resistor and resistor array is and no indication of wattage means I 6W I 8W respectively Note 2 The unit of capacitor and capacifor array is F and no indication of voltage means 50V Note 3 The componenis in bracket depend on the printer type if tt is installed or not on the board Refer to parts list SIDE D 6 22 15 4 10 9 8 IC3 D LSO6 SIDE C 6 23 52065 6645 PERIPHERAL 3 24V 4 24Y
42. Head Carrying Mechanism THEORY OF OPERATION 1 Timing Detectors 1 and 2 These detectors comprise of the pulse plate attached to the motor shaft the photo interrupter on the terminal board and the waveforming circuit When the pulse plate cuts off the light from the photo interrupter LED the photo interrupter s photo transistor goes off 2 Home position detector This detector comprises of the detector plate under the carriage and the photo interrupter on the home position detection board When the carriage is at the home position the photo interrupter s photo transistor goes off 3 Motor control circuit This circuit holds the motor to the correct printing speed This circuit mainly comprises of power transistor TR2 and the electronic governor IC IC1 on the terminal board The speed of the carriage motor is measured from Timing Signal 1 This signal is compared to the reference signal The result of this comparison controls the voltage applied to the carriage motor thus holding the printing speed steady 5V 25 CN2 f I l Motor Control Circuit l D 2 gt M GND Gate Array 45V 5V 5V 5V 5V Timing Detector 2 Al 5V Timing Detector 1 LED Main Logic Board Terminal Board 1 I es Home Position Detector Figure 2 15 Circuits Related to the Print Head Movement Mechanism
43. NT R5422 LOOP BOARD BOARD OPTION OPTION TTrYr TXDR TTY TXD TTr TXDR TTY RXDR TTY TXD TTY RXD SUPPLY 24 HO 2 HD 4 TXD HB DTR HD 6 RXDLIN HO CMNI ETSUN RXD OUTI HD CMN2 CTS OUTI HD CMN3 FAULT e c FAULT HD 9 o RS422 CONT TH GND HD 5 N C HD 5 OP IZ F HD DP I F OP I F GP I F OP I F OP I F DP 1 F LF 81 LF 2 LF 3 LF 4 LF CMNA ROCK SW LF CMNB MOTOR MOTOR CONTROL MOTOR MOTOR GND 5 H P SIG _ VALIDATION 515 F GND TXD BLACK MARK SENSOR TIMING SIG RXD lalo 5 5 5 5 TIMING 5162 RTS S GND CTS PAPER END I N C GND N C OB I F I RCH KC GND FAULT MULTI PRINTER TXD MULTI PRINTER OP I F 3 4 1 5 DTR N C OP I F 7 QP t F B CN10 5Y ON LINE SW FEED SW
44. RICA INC 70 D Ethel Road West Piscataway NJ 08854 U S A Tel 908 572 9512 Fax 908 572 5095 STAR MICRONICS DEUTSCHLAND GMBH Westerbachstra e 59 D 60489 Frankfurt Germany Tel 069 789990 Fax 069 781006 STAR MICRONICS U K LTD Star House Peregrine Business Park Gomm Road High Wycombe Bucks HP13 7DL U K Tel 01494 471111 Fax 01494 473333 Printed in Japan 80822796
45. RN RESISTOR 0 33 OHM 3M 1 _____05291045 FILM 0 275 1 FOR US UK C240 _____05291042 FILM 0 1UF 250 1 FOR 230 C2 3 05192224 2200PF 4001 2 c4 05054782 CHEM 4700UF 50V j ee C5 05051058 CHEM 1UF 501 ao y C6 7 05152223 CERA CAPA 2200PF 50V 214 21 c8 05043385 CHEM 3300UF 35V al 0 c9 05044771 CHEM 470UF 351 11 09251106 LINE FILTER SU10V 05050 1 12 09251036 CHOKE NM 16 300 1 09990058 FUSE 5TTIA 250 1 FOR US 80 9990021 EUSE Zu NEE L F2 Fuse caca 2500 O CN 80703850 CABLE UNIT 4x120TT sp300rr 1 i2 HU IAM BEEN 2 _ ____ 80700640 WIRE 2001101581 1201 1 05 2200 0 2400 1 230 0 2301 80100650 WIRE 2OULIO1SMWTIZOrI NL fus ecc220v ukc24ov 1 EC 230V UK 230 S O O F8 09990703 BEADS INDUCTOR 014 1 j 01 3 93930006 JUMPER WIRE STP122 CT 3 S41 09030019 SEESAW SWITCH 8815888 31 fif L 01903087 5 TAT 314 04991204 FASTENER 1185 1 O 04991220 CORD BUSHING 58504 1 1 09110090 CORD SET US PN 5 300 1 FOR US 1 09110158 CORD SET
46. _______ 5 55 04020017 RING 55 09 56 04020004 RING 1571 83101050 SPROCKET GEAR MP321S 1 __ __ 61 04033001 PUSH RIVET P30358 1 63 82020422 TERMINAL BOARD COVER MP342 i 64 00930403 SCREW 3 4 65 01903077 6 3 5 CT FL 01903069 SCREW 3 5 ST FL 04991225 FASTENER PLTO 7M 109 109 109 MN 109 109 CO Note1 When assembling the parts in drawing 35 and 42 do mix the version 1 parts and the version 2 parts 6 7 PARTS LIST 6 3 Sub assembly 6 3 1 Upper Case Unit DRWG NO REV PARTS NO PARTS NAME CONTROL PANEL ASSY 5 215 87210320 MICRO SWITCH ASSY SP300 1 FoR US HK TE OPERATION SHEET 5 3215 1 1 80087312 OPERATION SHEET sp321s 1 VER 2 13 4 80084240 BRAND PLATE SP321S 1 13 5 h 00930603 SCREW 3 6 PT 83025010 PAPER GUIDE 23215 1 fo 135 8 00930803 SCREW 3 8 1 6 8 PARTS LIST 6 3 2 Lower Case Unit Bottom view Bottom view DRWG NO PARTS NO PARTS NAME REMARKS RANK 83024960 LOWER CASE sp3218 1 83024961 LOWER CASE sP3219 1 _ 09090048 LEAF SWITCH 5101308 81310750 MECHANISM HOLDER PIN 8340 4 6 9 PARTS LIST 6 4 Wiring Schematic of Printer 6 4 1 For Serial Interface CURRE
47. ay 1s set to LOW the BUSY signal of connector 8 will be turned to HIGH notifying host computer that data cannot be accepted When the signal becomes LOW the CPU is notified that STROBE signal has fallen The CPU will set the RD signal to LOW and the gate array data will be read into the CPU 4 Upon completion of the data reading the CPU notifies the host computer of the data receivable state by setting the BUSY signal of connector CN8 and the ACK signal to LOW for a certain period of time THEORY OF OPERATION 2 2 2 Print Head Driving Circuit Edited print data is output to terminal Q of the 8 bit latch in the gate array through the CPU data bus as regulated by the issue timing of a WR signal When all the data is received for printing an energized time control signal is output from port T04 of the CPU This allows the print data to be output to HD1 HD9 of the gate array When the print data HD1 is high the transistor TR19 will be turned ON for 340 us energizing the print head solenoid to drive the print head i i i HD OQ 2 pnm Print Head HD4 lee ee HDS HD6 M GND HD HD8 409 Transistor s turn off delay time 2us Gate Array L am ow v o c m ow V m
48. d various drive signals from the CPU are sent to the printer mechanism to perform printing lt Explanation gt 90 41 Controls this printer b EPROM 27256 32K bytes Contains the program which executes control of the printer RAM 6264 8K bytes Used as stack area work area of the CPU and data buffer d Interface circuit e Gate array custom IC Inputs or outputs several signals f Driver The data edited by the CPU and gate array are sent to the printer mechanism after conversion to the signal for the print head drive carriage motor drive and paper feed motor drive respectively 2 Control Panel board This panel board is for manual operation of the printer 3 Printer Mechanism The printer mechanism is made up of a print head carriage motor paper feed motor and detectors 4 Power Supply Unit AC power is converted to DC25V and DC5V THEORY OF OPERATION 2 2 Main Logic Board 2 2 1 Interface circuit 2 2 1 1 Serial Interface When the voltage level is changed on this circuit RS 232C lt gt TTL the data transfer method Serial lt gt Parallel also changes IC9 is a dual RS 232C driver receiver which includes a capacitive voltage generator to supply RS 232C voltage levels from a single 5V supply Data from the host computer is sent from the RXD terminal to IC9 and is input to the CPU Serial data input to the CPU 1 converted into parallel data and output to the main board
49. e s Seb 4191 SEL IN 36 ae 505 l DBI 5Y 18 5V 082 085 GND 16 33 084 GND 19 30 085 B 086 087 MOUNTING HOLE D Sw2 RAS KSSO8 4 7 8 CNII y 2 INCI 5483 04A INCZ VL jal 6 53 rica 3 5V 4 lt 5 sense 54 241 1 241 45 Lot 4 55 ines M GND M GND 21 ne 0 1uX9 INC7 S GND 4 Ea Ena C Bypass condenser 1 3 7 3 10 0 0224 6 20 6 21 10K TR R45 R46 2 2K 22K A950 CNI HLEM 14S 24V 5 HD CMN PAS 7 HD CMN 1Kx9 RAS 33009 2 HD CMN 24 792 5508 1 BIB ds HDI E 3 gt 685 IRIS MS L Res p TRIZ 4 TR20 i sy R88 p IRIS I2 5 5 7 R89 T 4 NIS ra ee 2 5 9 R9I TR22 6 B M GND 54 49 THERMISTOR R43 7 10K il THERMISTOR 8 19 ET HLEM I9S 7 6 IO OP T n LF CMN 2R 55 LF CMN B cla 13 fae LE g 1 P 14 UNICI MEM UNIT 5 1 64 P 2 TIMING SIG TIMING SIG 2 19 10 W T HP SIG GND CI7 Cl4 CIS 0 0224 470P 470P PAPER END 161 53 63
50. ection 4 13 3 Repeat Adjustment A as explained in 3 4 1 90 06 Figure 3 9 Column Displacement Adjustment 3 6 This chapter explains disassembly and reassembly of the printer Note the following precautions during disassembly and reassembly 1 Disconnect the printer power cord plug from the wall outlet before servicing it 2 Assembly is the reverse of disassembly unless otherwise specified 4 BR Fe 7 R 3 After reassembly coat the screw heads with locking sealant 4 lubrication information is not provided in this chapter Refer to Section 5 2 4 1 Upper Case Unit mH Yen 4 1 4 2 Printer X daa pru ak 4 1 23 Control Panel Board sin 4 2 44 Main Logic Board u a 4 2 45 Power Supply Unit A NIN TENG 4 3 6 RUSOS ei io iu cad 4 7 Print Head an iii 4 4 48 Shaft Unit l erde 4 4 4 9 Terminal Board Unit een ns 4 5 4 10 Carriage Motor Unit aos 4 5 4 11 Paper Feed Motor Unit 4 6 4 12 Home Position Detector Board Unit 4 6 ATICO re 4 7 4 1 1 4 1 PARTS REPLACEMENT Upper Case Unit Turn off the power switch 1 disconnect the power cord from the wall outlet Remove e Extract the knob horizontally e Two tapping screws e Incline the upper case 3 and remove the connect
51. er Molykote EM 50L Dow Corning Corp Grease FLOIL GB 100 Kanto Chemicals Co Ltd Mobil 1 Mobil Oil Co Ltd 5 2 2 Lubrication method When lubricating during disassembly or assembly operations be sure to wash and clean the equipment well prior to lubrication to remove dirt and dust Lubricate the equipment at regular intervals of six months or after every one million lines Be sure to lubricate equipment after disassembling or replacing parts when oil has been removed by cleaning 5 2 3 Lubrication locations Refer to Figure 5 1 Lubrication location Contact surfaces between cassette ratchet and gear angle Contact surfaces between gear 12 X 49 X 0 5 and gear shaft A Contact surfaces between gear 6 X 40 X 0 5 and gear shaft C Contact surfaces between gear 16 X 48 X 0 5 and gear shaft D Contact surfaces between carriage stay 2 and carriage Contact surfaces between PF roller and PF roller bearing Contact points between gear 28 X 0 5 and gear 12 X 49 X 0 5 Contact points between gear 12 X 49 X 0 5 and gear 16 X 48 X 0 5 Cog surfaces of gear 16 X 48 X 0 5 Cross section of drive shaft grooves Contact surface between drive shaft and drive shaft bearing Contact surfaces between carriage stay 1 and CR bearing Contact surfaces between half nut and CR bearing Contact surfaces between bavel gear 12 X 0 5 and fram R 5 2 MAINTENANCE AND LUBRICATION 5 3 Screw Sealing Screw sealant
52. fter removal Remove the ribbon separator 1 Do not reuse a removed ribbon separtor 7 that has been deformed during removal 4 Set the adjustment lever 2 to the second stage position 4 Insert the thickness gauge 5 between the print head 2 and the platen 3 and measure the gap Refer to the figure 3 4 Measure at the left end and the right end of the platen The standard value for the gap is 0 33 0 42 mm If the gap is not within this range adjust it as explained in 3 2 2 If the gap is within this range attach a new ribbon separator Push in until both ends of the bottom of the ribbon separator contact the pawls Refer to the figure 3 3 Next push in further while pushing the sections indicated by arrows on both sides toward the inside until the hole on the ribbon separator enters the section on the carriage Be careful at this time not to bend the ribbon separator Figure 3 1 Ribbon separator removal 3 2 ADJUSTMENT Pawl 7th stage 2nd stage Figure 3 2 Figure 3 3 Figure 3 4 Adjustment Lever Position Rebber separator Gap Measurement Method 3 2 2 Adjusting the Gap between the Print Head and the Platen If the gap is not between 0 33 and 0 42 mm adjust it with the following method 1 Loosen the nut 1 2 Insert a shaft into the 2 mm diameter hole G then turn the carriage stay 2 so that the gap is 0 33 0 42 mm Dropping the inserted shaft towards the platen side 4
53. hese operations by setting its output port OUTB7 high or low Array OUT TRIO TRI Motor Figure 2 5 shows the carriage motor driving circuit 25 TR 10 OUTB7 Detector O M GND Gate Array Fig 2 5 Carriage Motor Driving Circuit 2 6 Motor Control Circuit THEORY OF OPERATION 2 2 5 Paper Feed Motor Driving Circuit This printer employs a stepping motor as the paper feed motor The stepping motor turns a certain angle when a drive pulse is received This 4 phase stepping motor is controlled by the four phase excitation method The following Is the description of the paper feed motor drive circuit and the control signal generated by the four phase excitation method 25V 5V Paper Feed Motor M GND EN RE OFF 2 3 4 1 1 1 e t 1 i I S33msec STEP NONE 11 94 t 1 n Excitation signal of paper feed motor 4 steps or less Excitation signal of paper feed motor 5 to 8 steps STEP ded 1 2 3 4 5 6 7 1 1 1 I 1 I 1 3 33msec 2 5 3 33 56 i ape 0 3 med 7 2 IN t I Excitation signal of paper feed motor 9 steps or more Fig 2 7 Paper Feed Motor Driving Signals 2 7 THEORY OF OPERATION The utilization of voltage applied to the paper feed motor is as follows Standby T5V Holding Bias Voltages to the pape
54. in No 16 frequency counter input terminal Pin No 18 ground If the timing signal frequency is not within the range of 1600 Hz to 1700 Hz for a sampling period of one second use the Phillips screwdriver 3 to turn the knob for the variable resistor 4 on the terminal board and adjust the frequency of the timing signal Remove the connector between Pins 1 and 2 of connector 4 1 and install the printer mechanism on the main unit by reversing the procedure with which you removed it Fig 3 6 Print Speed Adjustment 3 4 ADJUSTMENT 3 4 Adjusting the Column Displacement for Bi Directional Printing This procedure adjusts the displacement x shown in figure 3 7 between the center of the left most dot when printing from left to right and the center of the left most dot when printing from right to left This displacement must be no greater than 1 3 the horizontal distance between the center of neighboring dots the pitch 3 4 1 Adjustment A 1 2 3 Print and check the size of the column displacement Remove the printer mechanism according to the procedure described Section 4 2 To disable the cover open detector connect pin 1 and 2 of connector 4 1 together for example by putting a clip between them Loosen the two terminal board installation screws 2 If the return printing is to the right of the going printing move the terminal board 3 in direction of the black arrow
55. it Diagram CN9 SIDEB IL W 24P AD CN8 DBLC J25SAF 23L6 sv 24 TTY TXDR SD 2 TTY TXD SDI IQ I 1 23 TTY TXDR RDOE 9 TTY RXDR RD 18 20 A 5 19 F zl TTY RXDR CS 9 23 e 9 TTY TXD RS 4 24 TTY RAD RS I 25 M51953BL iB j 24 B po IMSA9210B O LA 15 3 c k 13 a 55 ouTAO 10 N CX4 JPZ 00 8 OUTA gt nos D RPD4712A HD4 fiey HD6 re 15 25 Sale Ere B OIR JBV HD9 RTS 4 50 81888 24 MULTI PRINTER 15 a TXD z 00 23 6 28 eo i ist ng NECS D2 Al RES MULTI PRINTER DTR 16 zes rp BW ROH i 22 uF Lyi vejs ev uswa 62 0 104 Ur IMSA FAULT 14 7 20 ho 5 921081 Ey GND 7 8 15124 DBI GND 13 Rag 5V 682 gr 542 2 PM 28 Loo DINO 1 0 0224 ro P DINI DBS Es F GND F GND DINZ DB6 ET c2 TOTO DINS DB 0 0224 5 aro 1 DING 1 4 DINS 100 a DIN6 a2 8 DIN pad EL AA ABI3 MOUNTING HOLE dia ET 5 ES ABIG RAS TOV D 592 4 e 5485 04 819929
56. ng IC IC3 in Figure 2 8 detects momentary drops in voltage or unstable voltage supply due to power failures etc on the 5V line If the voltage on the 5V line falls below 4 25V the RESET signal appears at the output terminal of voltage detecting IC 5V Voltage 1 LA typ 4 25 R1 O OUT 0 8V Output Voltage td 0 34xCdt pF Fig 2 9 Equivalent Circuit of Voltage Detecting IC Fig 2 10 Operational Timing Chart 2 This CPU has watch dog timer function which is a timer that issues an interrupt if the CPU malfunctions lost micro This interrupt tells the CPU that there has been a malfunction and it executes its malfunction program It cuts off the signals to the print head and the carriage motor sets the ERROR signal low etc 2 9 THEORY OF OPERATION 2 3 Power Supply Unit As the figure below shows the power supply unit comprises of the fuse board transformer and power supply board Transformer Fig 2 11 Power Supply Unit Configuration 2 3 1 Fuse Board The AC power passes through the fuse is filtered by passes through the LC noise prevention circuit and is fed to the primary winding of the transformer SW LI SUIOV 0505 CI 250V 0 luF o the AC Power AC Power Supply ranstormer Fig 2 12 Fuse Board THEORY OF OPERATION 2 4 Mechanism 2 4 1 Print Head Mechanism The print
57. or 4 from the terminal board 5 Remove the control panel board connector inside the upper case Printer Mechanism Remove Upper case unit according to the procedure described in Section 4 1 Cable Unit 1 Four stop rings SE2 2 Four washers 3 Printer mechanism 2 Four rubber feets 5 PARTS REPLACEMENT 4 2 4 3 Control Panel Board 1 Upper case unit according to the the procedure described in Section 4 1 e Two tapping screws 1 Control panel board 2 Main Logic Board Turn off the power switch 7 disconnect the power cord from the wall outlet Remove Two screws with wire 2 Four tapping screws 4 Base plate unit 5 Two cable units 6 Three connectors 7 Three screws Main logic board 9 PARTS REPLACEMENT Power Supply Unit Remove Main logic board according to the procedure described in Section 4 4 e Remove the board chassis 1 e Three tapping screws 2 e One screw with wire 3 e Power supply cord 4 e Remove the tow screws for transformer 5 and remove the PCB e Remove the upper case according to the proce dure described in Section 4 1 This procedure is not instructed in the diagram e Remove the power supply unit 7 by sliding it Remove the high voltage circuit 3 of the power supply unit by sliding it Fuses Remove Board chassis according to the procedure de scribed in Section 4 5 F1 G
58. r feed motor are changed by setting CPU port P33 to low or high and by turning transistors TR3 and TR2 on or off When TR2 is turned on 25V is applied to the motor via transistor TR2 When TR2 is turned off 5 is supplied to the motor via diode D2 2 2 6 Power On Reset Circuit The power on reset signal initializes the circuit elements and prevents operation errors when the power is turned on The power reset signal is output for approximate 3 4 ms when the power is turned on 9V 5V ICS 4 5 di GND Print Head Carriage Motor Driving Circuit amp gt gt WR gt Paperfeed Motor Driving Circuit Fig 2 S Power On Reset Circuit a When the power is turned on the RESET signal is output from the terminal 5 of IC3 M51953BL for approximate 3 4 ms This is determined by external capacitor C11 0 01F and it can be calculated by the following formula T 0 34 X pF usec 3 4 msec b This LOW signal triggers RESET terminal of the CPU and gate array c Reseting the CPU and gate array will cause all the drive signals for carriage motor the paper feed motor peripheral units and the print head to be ignored preventing operation errors when the power is switched on 2 8 THEORY OF OPERATION 2 2 7 Protection Circuit 1 A voltage detecti
59. t 2 5 2 2 4 Carriage Motor Driving Circuit 2 6 2 2 5 Paper Feed Motor Driving Circuit 222 7 2 2 6 Power On Reset Circuit 2 8 2 2 7 Protection CIU id ia diia 2 9 2 3 Power Supply URI 2 10 2 3 1 F s Board 2 10 24 A da aa gae 2 11 2 4 1 Print Head Mechanism 2 11 2 4 2 Print Head Carriage Mechanism 2 12 2 4 3 Paper Feed Mechanism 2 14 2 4 4 Ink Ribbon Feed Mechanism 2 15 24 5 uuu uu Beer 2 16 THEORY OF OPERATION 2 1 Block Diagram The block diagram of this printer is shown in Figure 2 1 Data Host Computer Interface Circuit Carriage Motor Driver Detectors Paper Feed Motor Printer Mechanism AC Power Supply Main Logic Board Fig 2 1 Block Diagram 1 Main Logic Board This board receives data from the host computer and stores it in the RAM in the order of arrival The CPU on this board reads the data from the RAM and edits it according to the program stored in the EPROM When the editing is complete
60. t of parts This manual has been prepared for use by a maintenance staff carrying out regular inspections or repairs when abnormalities occur This manual has been prepared for maintenance staff operating in the field and not for ordinary users 1 2 Model name notation 120 AC120V 220 AC220V 240 AC240V No of print columns 28 28 columns SP321S at 12 2 40 40 columns SP322S at 15 4CPI 35 35 columns SP323S at 15 nterface D Serial interface RS 232C C Parallel interface Papaer feed Sprocket Mechanism 1 28 columns at 12 2 2 40 columns at 15 4 35 columns at 15 3 Printer type 2 MP320 Series SP300 Series printer 1 1 GENERAL DESCRIPTION 1 3 Instructions apply models Serial interface SP321SD28 120 SP321SD28 220 SP321SD28 230 SP321SD28 240 SP322SD40 120 SP322SD40 220 SP322SD40 230 SP322SD40 240 SP323SD35 120 SP323SD35 220 SP323SD35 230 SP323SD35 240 1 2 2 ww EGF MU Eum THEORY OF OPERATION This chapter explains the electric circuits and the mechanisms 2 1 Block DI8gran i u aa ee 2 1 2 2 Logic Board CO P O 2 2 2 2 1 Interface GIFCUIE u 2 2 2 2 2 Print Head Driving Circuit 2 4 2 2 3 Print Head Temperature Detection Circui
61. tector This detector shows whether or not the front cover is installed When it is installed the precision snap acting switch is closed When the cover is removed the precision snap acting switch is open and the carriage motor circuit is cut off Precision Snap Acting Switch Motor Control Circuit Figure 2 18 Cover Open Detector 2 Paper out detector The paper out detector is installed on the bottom case When there is paper the leaf switch is open but when the paper runs out it 15 closed 5V Leaf Switch Detecting Signal GND Figure 2 19 Paper Detector CHAPTER 3 ADJUSTMENT This printer is adjusted in a variety of ways to obtain the prescribed performance This chapter explains those adjustments When replacing parts during maintenance inspections or after a problem occurs double check the adjustments afterwards 3 1 Tools and Measuring Instruments J 3 1 3 2 Adjusting the Gap between the Print Head and the Platen 3 2 3 2 1 Measuring the Gap between the Print Head and the Platon 3 2 3 2 2 Adjusting the Gap between the Print Head and the Platen 3 3 3 3 Adjusting the Print Speed 3 4 3 4 Adjusting the Column Displacement for Bi Directional Printing 3 5 3 4 1 Adjustment 3 5
62. wired areas or mechanisms and avoid getting them wet 2 Removal of dust pile etc Clean with a vacuum cleaner Note Check the amount of oil after cleaning and lubricate if necessary 5 1 2 Checks Maintenance checks for this printer is divided into the two areas of daily check that the person using the printer carries out during normal use and regular check that can be done only by an experienced person with a knowledge of the equipment 1 Daily check Check that the printer 15 being properly used Is the ribbon cassette set in the correct position Is the peper set correctly Is there any dirt or foreign object in the printer 2 Regular check Carry out regular check and lubrication after six months use or after printing 1 million lines Check for bending of springs Remove any dirt or dust in the area of the detectors Remove dirt around the drive shaft and lubricate Check the gap between the platen and the print head 5 1 MAINTENANCE AND LUBRICATION 5 2 Lubrication Lubrication is extremely important for preserving the original performance of the printer over a long period of time 5 2 1 Type of oil The type of oil used has a major influence on the performance and durability of the printer You should pay particular attention to the cold temperature properties of the oil We recommend use of the grease and lubrication oils listed below for this printer Type of Product vame Manufactur
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