CTB Series - Scale Manuals
Contents
1. LM723CN 10K TIO LM2931 Li 4 8550 i M EM s Puis Ea KEY VCH a R21 AC12 89 de 1000825 2K LM2931 R20 1 3 AVCC E VIN VOUT d de 2 ACA aco __ 15 c6 e lzougosv 580 25 VGND lt gt CHECK ZE eg 3K 6 8uf 16v 002UH 20 ae E 0 10K 7 8 EL2 C Et aul 2 B P AST2 VREF Ger 8 2 45152 cL AINI SDI Spr AINI SDO AIN2 u SCLK Sa 3 55532 ALS SOS 2 CTB serial bench scale service manual 15 2 SCHEMATIC display KEY 1 39 Lg 103G 2 POO 2 3 37 3 4 P02 4 5 P03 z 5 6 P04 6 n POS 5 7 8 P06 55 8 9 P07 m 103G 5532 5 3 4 21 5532SCLK 33250 NT E 22 5532500 2 INTO P21 DI 8 5 P22 7 P23 6 P24 5 P25 4 EA VP P26 3 P27 2 SO 103G nn II TxD 02 ALEP 30 PSEN D SDA 10UF 10V 108 8032 vss ed x SCL 2 5 Al 1 WP A0 HT24LC02 R2830K VB U3 1 358 PCHI PCH2 LCD 04 2 2 5802515 MA 10 se 3 ZE d 46 SEG24162. SEGA 4 el 5 a 9 SEGA SEGII SEG2317 8 SEG3 5 44 ro 8 SEG3 SEGI2 SEG2218 7 SEG 6 3 DAS 7 SEG2 SEGI3 9 6 SEG 7 2 6 SEGI SEGI4 edi 5 CO 5 _ 8800 8015 2 COM321 455658 ics 9 40 3 RD SEGIT 3 2 WR SEGI8 1 DATA SEGI9 37 vss SEG20 39 osco SEG21 pg OSCI SEG22 bg VLCD 5623 33 VDD SEG24 bg IRQ SEG25 21 BZ SEG26 50 BZ SEG pg SEG28 35 COMI SEG29 bg SEG30 9 COM3 SEG31 16218 rriko D 2svnour _ 2 y co us L H Chis 3 B 1 Sa clk E ZSVAHDUF 5 SOUL TXD lt bri 4 T2OUT 8 RIN ROUT 9 m SERIAL 15 5 25V 10UF MAX232 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 24 CTB serial bench scale service manual 15 3 PARTS DRAWING CTB serial bench scale service manual 15 4 PARTS LIST Parts name Material overlay PC iron plate iron Top cover ABS Main PCBA washer EPDM screw 518 4 8 Battery holder SUS 304 COIN OD gt Battery Lead acid 6V 4Ah Bottom cover ABS washer EPDM screw 18C Neck parts 1 ABS Neck parts 2 ABS Neck parts 3 ABS nut ek ek ED ek Al 5 518 Load upper supporter Al Load cell Al Po
3. from indicator bracket like picture then release 6 pcs screw from back cover of the indicator use cross srew driver Then open the back cover release 4 pcs screw of main board release main board carefully pull out all connector on the main board out main board carefully Then board plug all connector at last ATTENTION CH3 96 m then you can bring Je install the new main 4P connector for 20 CTB serial bench scale service manual power must be pulled out at first and plug at last After check anything try to turn on power if anything is OK close the back cover replace main board completely 14 2 replace load cell At first use internal hexagon screw driver release 4 pcs screw from upper bracket remove upper bracket then release 4 pcs screw from bottom bracket by this way you can remove load cell now Use iron to solder cable for load cell remove cable from connector then pull cable from pole Bring new load cell let cable through pole solder the cable to connector Now you can fix 8 pcs internal hexagon screw again Attention fix tight enough as you can Then you can check and adjust corner and overload stop use file and internal hexagon screw driver After check anything try to turn on the power and show the internal counts if internal counts looks OK close the pan change load cell completely 14 A replace MPU At first release indicator from indicator brack
4. CTB serial bench scale service manual FUNCTION MENU SETTINGS FUNCTION SUB FUNCTION DESCRIPTION DEFAULT VALUE FO H L SEt Lo Set a value for the Low limit 000 000 SEt HI Set a value for the High Limit 000 000 Fl toL to CLr Clears the accumulation memory without printing the results to P C Prints the Accumulation memory total and then clears the memory to Prt Prints the Accumulation Total does not clear the memory F2 off bL Set the backlight to be on automatic or off EL on EL Au EL off EL Au beep Set the beep mode check weighing mode 2 check weighing mode3 no beep sleep Set the time of automatic sleep 1 5 10 30 or OFF 10 Prog Pin Enter the programming and calibration menus by entering the correct password See the section 11 10 CTB serial bench scale service manual SECTION 8 BATTERY OPERATION The weighing indicator can be operated from the battery if desired The battery life is approximately 100 hours When the battery needs charging a symbol on the weight display will turn on The battery should be charged when the symbol is on The scale will still operate for about 10 hours after which it will automatically switch off to protect the battery To charge the battery simply plug into the mains power The scale does not need to be turned on The battery should be charged fo
5. number of parts used for the sample As more weight is added the display will show the number of parts pcs Press the FUNC key to return to normal weighing 6 5 Check Weighing 6 5 1 About check weighing Check weighing is a procedure to cause an alarm to sound when the weight on the scale meets or exceeds values stored in memory The memory holds values for a high limit and a low limit Check range set hi limit and low limit as different value also hi limit value is larger than low limit Check key point set hi limit and low limit as same value Check mode 2 When check range the display will show OK and the beeper will sound when the weight is between the limits When check key point the display will show Ok and the beeper will sound when the weight is under the limits Check mode 3 When check range the display will show OK and the beeper will sound when the weight is out of the limits When check key point the display will show Ok and the beeper will sound when the weight is over the limits 6 5 2 Set limits Press F key it will display FO H L press ZERO key to enter use TARE key to select SET HI or SET LO press ZERO key to enter use SMPL key to move active digit use TARE key to change value use F key to clear value After you enter the value press ZERO key to sure press Print M key to escape CTB serial bench scale service manual 6 5 3 Set check weighing mode Press F key to enter sett
6. the pan is attached Indicates the load cell or the electronics may be faulty If the problem persist contact your dealer for assistance Err 9 Unstable can t return to zero When turn on the power if internal counts is not stable display will have Err 9 please check the platform and load cell If the problem persist contact your dealer for assistance 15 6 NUMERIC AND ALPHABETIC CHARACTERS DISPLAYED ON LCD 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 A B C D E F G H J A B C D E H I J K L M N O P Q R S T K L M N Q R 5 T U V W X Y Z U V W X Y Z Citizen
7. 3 4 Can t 19 Egazelai 20 13 6 Keyboard can t Work aka 20 the display anti el aix ee enge en NM 11 512 13 14 CTB serial bench scale service manual SECTION14 CHANGE PARTS 5 21 14 1 Replace main AA 21 142 Replace load ell 2 2 ae ak 21 14 3 Replace MPU ivi arena 22 14 4 Replace batterya user Ba a 22 GANIEN ERRE 23 151 main 23 15 2 Schemalie display as r s east 24 19 3 Parts dl awing AAE 25 Passt name ne ee a a 26 19 8 Eror ezla ed 27 15 6 Numeric and alphabetic characters displayed on LCD 27 CTB serial bench scale service manual SECTION 1 INTRODUCTION The CTB series of bench scale provides an accurate fast and versatile series of general purpose weighing scale with counting and check weighing functions There are 3 series scales within the range the platform size from 420mm x 520mm the capacity range from 15015 to 600 All the keypads are sealed color coded membrane switches and the displays are large easy to read liquid crystal type displays LCD The LCD s are supplied with a backlight All units include automatic zero tracking audible alarm for pre set weights automatic tare and an accumulation faci
8. F1 TOL See below 6 7 Net gross change When you weigh press N G key you can check net weight and gross weight CTB serial bench scale service manual SECTION 7 PARAMETERS The scale has 6 parameters that can be set by the user plus a method of entering the calibration section To set parameters press the FUNC key The display will show the first function FO H L Pressing the TARE will cycle through the other functions Pressing ZERO ENTER will allow you to set the function It may be necessary to either use TARE or set a value using the SMPL gt key to move the active digit and then using the key to increment a digit followed by the ZERO ENTER key to enter the value Use the PRINT ESC key to leave a parameter unchanged For example when the display shows FO H L press the ZERO ENTER key to begin The display will show Set Lo press the ZERO ENTER key to set the low limit or press the TARE to skip to the next parameter Set Hi for setting the high limit After pressing the ZERO ENTER key to set a limit use the the SMPL gt keys to change the flashing digit then use the TARE key to increment the flashing digit Continue to the next digit and set it as needed When all digits have been set press the ZERO ENTER key to store the value The display will go back to the parameter just set i e Set Lo Advance to another parameter if needed or press the PRINT ESC key to return to weighing
9. If linearity can be set by the user incorrect it will be described in the user Obstruction between sample and mandal OR uBitetwelahitdisslaved Check pan is installed correctly 9 g Play Verify installation is acceptable Over load Stops hitting pan support or hitting bottom of load cell Cannot use Shipping screw not removed if ri bekek Full applicable installation Capacity Electronic problem on A D Check the weighing units used Parameters set incorrectly Load Cell or mechanics Damaged Look for obstruction under pan Overload stops hitting too soon a SUSO SAk Not Linear Load cell or mechanics damaged If linearity be set by the user D Danae it will be described in the user manual Off Center Adjust mechanics Look for obstruction under pan 15 CTB serial bench scale service manual Loading Overload Stops not correct shipping screws and verify pan error Load Cell damaged installation Battery will Mains voltage not present or too Verify the batteries are low rechargeable types not Charging circuit failure Check power supply voltage is charge Battery Failure correct SECTIOIN 13 TROUBLESHOOTING CHK power switch umm me ul zd Ii Replace power switch or Battery voltaae gt 5 5V T10 pin 3 Charging the battery immediately output5V CHK T10 and around circuit CHK U1 pin9 High level when power CHK U1 and a
10. This document hosted by OlaWillKnottScales ed SLP GOZ E ZA EEE to visit us the next time you need a scale Electronic Platform amp Bench Scale CTB Series Citizen 150 9001 2000 CERTIFIED CTB serial bench scale service manual UGCTB E1 0 Table of Contents SECTION 1 INTRODUCTION a 55 521 915349 Gu re 2 SPECIEIGATIONS cesis tions Be De ice pat ki INSTALLATION e ar ceo ne ea 4 KREY DESCRIPTION Saar aa ee iut pe Pluk idek qug SECTION 5 DISPLAY SE lea ans enge 6 g SECTION SECTION SECTION SECTION 6 1 Zeroin 652 ezi ei iiss reese sas cee eck oh uit Ix iD re RE IEEE 8 3 Weighimg a Samples 6 4 Parts 9 5 tad arkara e Uso ih Cb Ed MD Du E A Ec m e bk 6 36 Accumvmlatecd gidatu uran ae ete e eder ES 6 7 NetUgtross change be EIE ER PEOR Ee Mx ati 8 SECTION PARAMETERS ide ai ee re irn bs oda s SECTION 8 BATTERY OPERATION a Haste en SECTION CO 232 OUTPUT i lite eh nen eere o ete Al SECTION TO CALIBRATION ee es Be aaa SECTION 11 TECHNICAL PARAMETES urne aan en ea SECTION 12 TROUBLE 15 SECTION 13 16 13 1 INO ass sun 16 13 2 17 13 3 Can t charge the battery anna 18 1
11. counted lt gt Includes 2 line feeds When recalling the Total weight stored in the accumulation memory the output format is A line of stars is shown lt gt Includes 1 line feed TOTAL No 5 Wgt 21 455kg kkkkkkkkkkkkkkk 12 CTB serial bench scale service manual SECTION 10 CALIBRATION Turn the power off During the counting from 9 to 0 press the FUNC C key The display will show CAL for a few seconds While it is showing CAL press the UINT PRINT and TARE keys in sequence to enter the Calibration section The display will show unLoAd Remove any weight from the platform Press the ZERO ENTER key The display will show LoAd Place the calibration weight on the scale Press the ZERO ENTER key If the calibration weight is right the display will show PASS If the calibration weight is unapt the display will show FAIL or FAIL the calibration is not acceptable If the calibration is acceptable the display will return to normal If an error message is shown try calibration again as a disturbance may have prevented a successful calibration If the problem persists then contact your dealer SECTION 11 TECHNICAL PARAMETERS Press key when normal weighing mode display shows FO H L press TARE key until display shows P ROG press ZERO key display shows You can press unit PRINT TARE key to enter setting mode press Tare key to select parameter
12. et like picture then release 6 pcs screw from back cover of the indicator use cross srew driver Then open the back cover pull of the connector for power CH3 96 4P use special IC kit or minus screw EIN 6 driver to put up the MPU gt gt from DIP40 socket Attention please don t let the IC pin tilt then use the EE A ur new MPU plug into DIP40 ESO socket Attention please note the gap direction after check anything is OK plug the power connector CH3 96 4P try to turn on the power if scale work correctly replace MPU completely 21 CTB serial bench scale service manual 14 4 replace battery At first release 4 pcs screw of the battery cover use cross screw driver Then open the battery cover you can bring the battery from scale use iron solder off wire bring new battery use iron to solder the battery Attention red line to positive electrode black line to minus electrode after check anything plug the connector for power and try to turn on the power if scale work correctly replace battery completely 22 CTB serial bench scale service manual SECTION15 APPENDIX 15 1 SCHEMATIC main VAC T2 TIP31C 5 GND 2 uw 3 BN 2 LOADCELL AR6 0 022UF 0 0220 S ARS C 3 10K Gereka
13. ing mode press TARE until display show F4 OFF press ZERO key to enter press TARE key until display show BEEP press ZERO key to enter press TARE key to select BP 2 check mode 2 BP3 check mode 3 BP1 not sound press ZERO key to sure press PRINT M key to escape 6 5 4 NOTE The weight must be greater than 20 scale divisions for the check weighing to operate To disable the Check Weighing function enter zero into both limits by pressing the FUNC key when the current limits are shown then pressing ZERO ENTER to store the zero values 6 6 Accumulated Total The scale can be set to accumulate manually by pressing the PRINT key See the PARAMETERS Section for details of selecting the method using function F5 P The accumulation function is only available when weighing It is disabled during parts counting The weight displayed will be stored in memory when the PRINT key is pressed and the weight is stable The display will show ACC 1 and then the total in memory for 2 seconds before returning to normal If the optional RS 232 interface is installed the weight will be output to a printer or PC this type machine has no print function Remove the weight allowing the scale to return to zero and put a second weight on Press the PRINT key the display will show ACC 2 and then the new total Continue until all weights have been added To view the totals in memory press enter the PARAMETER SECTION and use function
14. l battery not charged Display turned off Problem Possible cause Common solutions Mains power is turned off a Mde Display is Power supply not plugged in blank No Power supply faulty Verify the voltage going to the labels on the power module or scale scale matches the power supply 14 CTB serial bench scale service manual Display blank after on Pan not installed test Unstable weight dde UEA Saz Error Load cell damaged Try turning the scale on again message Mechanics damaged Display is locked OL or FULL Sek 65 Check the pans are installed Load Cell or mechanics appears on damaged correctly display Power supply faulty Try turning the scale on again Weight on scale below Ee d Check the pans are installed UL or NULL correctly Pan support not seated properly displayed Power supply faulty Try pressing Zero key l oad Call cr mechanics Try turning the scale on again damaged Drafts or air currents 08 under Verify scale is Sample RENEK acceptable location and ona Display is weighing good table unstable Vibrations through table Verify the power supply is Change correct for the scale dramatically Power supply faulty Calibration error Recalibrate Geruza ezda Linearity error set Linearity stability of the scale and fhe Unit calibrated with inaccurate did 2 Weight Weight weighing units required value Sed notlevel
15. lay The TARE indicator will be on As product is added only the weight of the product will be shown The scale could be tared a second time if another type of product was to be added to the first one Again only the weight that is added after taring will be displayed When the container is removed a negative value will be shown If the scale was tared just before removing the container this value is the gross weight of the container plus all product that was removed The zero indicator will also be on because the platform is back to the same condition of CENTER OF ZERO range 6 3 Weighing a sample To determine the weight of a sample first tare the empty container then place the sample in the container the display will show the weight and the units of weight currently in use 6 4 Parts Counting When the scale is showing weight pressing the SMPL key will start the parts counting function CTB serial bench scale service manual Before beginning tare the weight of any container that will be used leaving the empty container on the scale Place the number of samples on the scale The number should match the options for parts counting 10 20 50 100 or 200 pieces Press the SMPL key to begin The scale will show SP 10 asking for a sample size of 10 parts Change the sample size by pressing the TARE key the display will cycle through the options 10 20 50 100 200 and back to 10 Press the SMPL key when the number matches the
16. le SST Bottom bracket Al Overload stop screw 518 Pole bracket Mat for pole 189 x 132 x 0 8 Spring washer steel 10x6x2 internal hexagon screw 35 M6 x 12 feet Rubber internal hexagon screw 35 M12 x 45 internal hexagon screw 35 M12 x 45 washer 518 12 7 1 2 518 M3 x 20 Neck parts 4 ABS pan SST 420 x 520 washer EPDM 8x 3 5 1 2 screw b Ww ow 518 M3 x 8 CTB serial bench scale service manual 15 5 ERROR CODES ERROR CODES DESCRIPTION RESOLUTION Over range Remove weight from the scale If the problem persist contact your dealer for assistance Err 1 Date Setting Error Enter date using correct format and reasonable values Format yy mm dd Err 2 Time Setting Error Enter time using correct format and reasonable values Format hh mm ss Err 4 Zero Setting Error The scale was outside the normal zero setting range either when it was turned on or when the ZERO key was pressed Remove weight from the scale and try again Use the TARE key to set the display to zero value If the problem persist contact your dealer for assistance Err 6 A D out of range The values from the A D converter are outside the normal range Remove weight from the scale if overloaded make sure
17. lity that allows the individual weights to be stored and recalled as an accumulated total SECTION 2 SPECIFICATIONS CTB serial bench scale service manual Model CTB 150 CTB 300 CTB 600 Platform size 420mm x 520mm 420mm x 520mm 420mm x520mm Capacity 1505 30016 60016 Resolution 1 3000 Interface RS 232 Output Optional standby Stabilisation Time 1 Seconds typical Operating Temperature 5 C 35 C 41 F 95 F Power supply External AC adapter 9V 800mA Calibration Automatic External Display 6 digits LCD digital display with 24mm high digits Balance Housing Indicator ABS Plastic Load cell drive voltage 5V 150mA Load cells Up to four 350 ohms cells CTB serial bench scale service manual SECTION 3 INSTALLATION GENERAL INSTALLATION The scales should be sited in a location that will not degrade the accuracy Avoid extremes of temperature Do not place in direct sunlight or near air conditioning vents Avoid unsuitable tables The tables or floor must be rigid and not vibrate Do not place near vibrating machinery Avoid unstable power sources Do not use near large users of electricity such as welding equipment or large motors Avoid high humidity that might cause condensation Avoid direct contact with water Do not spray or immerse the scales in water Avoid air movement such as from fans or opening do
18. n on or off the power CTB serial bench scale service manual SECTION 5 DISPLAYS The LCD display will show a value and a unit to the right of the digits In addition there are labels for TARE GROSS weight Zero and for Low battery Low Batterv Svmbol y Stabilitv Svmbol Parts Countina Units i i e pcs HI GROSS 2888888 10 ZERO Checkweiahina Svmbols Weiahina Units Center of Zero Indication CTB serial bench scale service manual SECTION 6 OPERATION 6 1 Zeroing The Display You can press the ZERO ENTER key at any time to set the zero point from which all other weighing and counting is measured within set in 0 parameter from power up zero This will usually only be necessary when the platform is empty When the zero point is within CENTRE OF ZERO range display will show the indicator for zero The scale has an automatic rezeroing function to account for minor drifting or accumulation of material on the platform However you may need to press the ZERO ENTER key to rezero the scale if small amounts of weight are shown when the platform is empty 6 2 Taring Zero the scale by pressing the ZERO ENTER key if necessary Place a container on the platform a value for its weight will be displayed Press the TARE key to tare the scale The weight that was displayed is stored as the tare value and that value is subtracted from the display leaving zero on the disp
19. ors Do not place near open windows Keep the scales clean Do not stack material on the scales when they are not in use INSTALLATION OF CTB SERIES The pillar is attached to the base using a bracket that must first be attached to the base frame using the 4 bolts supplied The Pillar is secured to the bracket using 2 set screws The cable from the base to the indicator module is run through the tube out through the plastic support at the top Excess cable can be stored within the tube The CTB Series comes with a stainless steel platform packed separately Place the platform in the base Level the scale by adjusting the four feet The scale should be adjusted such that the bubble in the spirit level is in the centre of the level and the scale is supported by all four feet If the scale rocks readjust the feet Attach the indicator module to the pillar by sliding it over the bracket with the flanges engaged in the groves on the base Attach the AC power adapter to the connector on the back of the indicator CTB serial bench scale service manual SECTION 4 KEY DESCRIPTIONS Zero or 0 Set the zero point for all subsequent weighing The display shows zero A secondary function e of Enter key when setting parameters or other functions Tare or lt gt Tares the scale Stores the current weight in memory as a tare value subtracts the tare value from the weight and shows the results This is the net weight Entering a value using
20. press Zero key to sure press Print key to escape Before you set parameters please short the K1 FUNCTION SUB FUNCTION DESCRIPTION 13 CTB serial bench scale service manual Pl REF AZN 0 This option is used to select the auto zero tracking Options 0 25d 0 5d 0 AUTO This option is used to select the Initial zero setting range mechanism when turn the indicator Options 0 2 5 10 20 0 RANGE This option is used to select the SAZSM manual zero range when press the ZERO key Options 2 4 10 20 P 2 CAL C AP This display will show xxxxxx for setting the capacity CAL Calibrate see detail in section 10 CNT This display will show xxxxxx for indicating the internal counts P3 P RT P AUTO Automatic print setting when the weight is stable the data will be printed automatic P PRT Manual print setting when the weight is stable press the PRINT key the data will be printed P cont Connect PC the data will be send to PC AUDIT TRAIL COUNTER CALIBRATION When scale self check press the SMPL Key it will show CAL X it is an Audit trail counter for each Successful CALIBRATION PARAMETER OPERATIONAL COUNTER When the scale self check press the N G key it will show opt X it is Audit trail counter for any change in parameter setting SECTIOIN 12 TROUBLE SELF CHECKING turn on test Interna
21. r 12 hours for full capacity Just under the quantity display is an LED to indicate the status of battery charging When the scale is plugged into the mains power the internal battery will be charged If the LED is green the battery has a full charge If it is Red the battery is nearly discharged and yellow indicates the battery is being charged As the battery is used it may fail to hold a full charge If the battery life becomes unacceptable then contact your distributor 11 CTB serial bench scale service manual SECTION 9 RS 232 OUTPUT opt ional The CTB Series of scales can be ordered with an optional RS 232 output Specifications RS 232 output of weighing data ASCII code 8 data bits No Parity Connector 25 pin d subminiature socket Pin 2 Output Pin 3 Input not used at this time Pin 5 Signal Ground Data Format for normal weighing operations parts counting or recalling of totals from memory will all be different Examples follow Normal Output GS 12 340kg GS for Gross weight NT for net weight and a unit of weight No 1 This number increments every time a new value is stored in memory Total 12 340kg The total value stored in memory Includes 2 line feeds lt gt When parts counting the weight unit weight and count will be printed GS 12 340kg GS for Gross weight NT for net weight and a unit of weight U W 123 4g pcs The average piece weight computed by the scale PCS 100pcs The number of parts
22. round circuit 13 2 no display CHK ST and around CHK START circuit CHK LCD break 16 Replace LCD CTB serial bench scale service manual 13 3 Can t charge the battery START Battery bad battery Replace battery XC E Replace the fuse and solve the problem like transformer had Cut the circuit then CHK transformer Open U5 pin11 12 CHK BR1 output CHK BR and around Restore the circuit CHK U5 pin2 output gt 7V CHK M B U5 and around CHK M B D1 R7 and around circuit 17 CTB serial bench scale service manual 13 4 Can t weigh CHK whether can show internal Add load on pan CHK ei Bie is CHK power circuit CHK load cell input circuit Add load on pan Y CHK output between AU1 pin1 and pin2 signal CHK AU1 and around circuit 18 CTB serial bench scale service manual 13 5 unstable Load cell and bracket touch Solve touch problem N M B AUZ and around 13 6 use keyboard 19 CTB serial bench scale service manual START Find the line for useless key short and open it CHK the scale accept this Replace keyboard CHK U1 and around circuit Note M B means main board D B means display board SECTION 14 CHANGE PARTS PROCESS 14 1 Replace main board At first release indicator
23. the keypad will store that value as the tare value A secondary function of incrementing the active digit when setting a value for parameters or other functions D Smpl or 22 Enter counting mode from weighing mode Shift unit weight counts and total weight when counting mode Move the active digit right when setting values for other functions The second function when the scale self check press the key it will show CAL X it is an arithmometer COUNTER for the times of calibration is successful N G Used to select the weight model of the scale If the scale has tared switch to the mode of net weight or gross weight Move the active digit left when setting values for other functions The second function when the scale self check press the key it will show opt X it is an arithmometer COUNTER for the times of parameter setting Func or F Used to select the function of the scale If the scale is weighing it will select parts counting Of it is not in weighing mode it will return the user to weighing Secondary function is to act as a clear key when setting values for parameters or other functions Print or To print the results to PC or printer using the optional RS 232 interface It also adds the value to the accumulation memory if the accumulation function is not automatic Secondary function ESC is to return to normal operation when the scale is ina parameter setting mode ON OFF or D Tur
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