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Symptoms

Causes & Remedy

Corner error is too much.

1. Mechanism unit is defective, such as Roberval

plate (Spring) has been bent or twisted.

2. Pan base touches other parts.

Display suddenly
disappeared in operation.

1.  Built-in battery (option) has been consumed.
2.  AJDP board is defective.
3.  AC adaptor is defective.

b-Err

appears.

1. AJDP board is defective.
2. Coefficient memories ( address data) have

changed by noises or static electricity. Adjust
linearity.

d-Err

appears.

1. Address data related to determine the capacity

has been destroyed. Contact the shipper.

2. AJDP board is defective.

I-Err

appears.

1. The calibration weight is less than ½ F.S.

2-Err

appears.

1. The data error exceeds 0.4%. Or perhaps the

scale may be defective. Contact the shipper.

3.3 Primary Checks

1. Is any wind around the site?

Is any oscillation? Is the working table stable.

2. Is anything under the pan base or the weighing pan?

3. Is the weighing pan right one.

4. Is AC adaptor connected both with the scale and with the scale and with the

outlet properly?

5. Is battery option charged sufficiently?

- 10 - EW_EW-C_EG_N-SH-e-0722

Содержание EG

Страница 1: ...alingen Frommern E Mail info kern sohn com Tel 0049 0 7433 9933 0 Fax 0049 0 7433 9933 149 Internet www kern sohn com GB Service Manual Electronic Precision Balances Page 2 KERN EW EW C EG N Version 2...

Страница 2: ...ks 10 3 4 Checks For Electric Electronic Parts 11 4 ADJUSTMENTS AND SETTINGS 12 4 1 Span Calibration CAL 12 4 1 1 EW and EW C Type 12 4 1 2 EG Type 13 4 2 Lock Switch 14 4 3 Corner Error Adjustment 15...

Страница 3: ...36 5 5 1 How to uninstall Tuning fork assy 36 5 6 Sequence Of The AJDP Circuit Board Replacement 37 5 6 1 How To Remove AJDP Circuit Board 37 5 6 2 How To Install AJDP Circuit Board 38 5 7 How To Rem...

Страница 4: ...1 Total View 1 1 Total View Of EW Type 220 12000g 1 2 Total View Of EG Type 220 620g 2200g 4200g 4 EW_EW C_EG_N SH e 0722...

Страница 5: ...1 3 Total View Of EW C Type 600ct 120g 1 4 Total View Of EW Type 120g 0 0002g 5 EW_EW C_EG_N SH e 0722...

Страница 6: ...2 Electronic Construction 2 1 Block Diagram EG EG AC Adaptor 6 EW_EW C_EG_N SH e 0722...

Страница 7: ...2 2 Whole Wiring EG EG 7 EW_EW C_EG_N SH e 0722...

Страница 8: ...3 Troubleshooting 3 1 Troubleshooting Procedure 8 EW_EW C_EG_N SH e 0722...

Страница 9: ...cted by a wind or disturbing oscillation Check environment or working base Check also setting of stabilization time See operation manual o Err appears with a net load less than specified capacity F S...

Страница 10: ...earity d Err appears 1 Address data related to determine the capacity has been destroyed Contact the shipper 2 AJDP board is defective I Err appears 1 The calibration weight is less than F S 2 Err app...

Страница 11: ...carried out on back of AJDP board after removing the upper case at test Points and Pins of CN1 CN4 TP4 and TP6 1 Check of input voltage TP0 1 of CN1 8V 12V 2 Power voltage in the circuit TP0 2 of CN4...

Страница 12: ...ale 2 The calibration is available with of F S Nevertheless it is recommend to use weight closer to F S for accurate calibration 3 Error messages o Err The calibration weight is over the full capacity...

Страница 13: ...4 1 2 EG Type 13 EW_EW C_EG_N SH e 0722...

Страница 14: ...4 2 Lock Switch Set the lock switch to Locked before stamping or sealing so that the user is unable to change parameters or to calibrate the scale 14 EW_EW C_EG_N SH e 0722...

Страница 15: ...eferring to 5 1 Place the pan base then place the weighing pan on the mechanism Adjust the level Remove fixing screw on AJDP board and unplug connector with CN4 on AJDP board Adjust corner errors by a...

Страница 16: ...4 3 2 EW 2200 12K 16 EW_EW C_EG_N SH e 0722...

Страница 17: ...4 4 Adjustment Sequence For Cases 17 EW_EW C_EG_N SH e 0722...

Страница 18: ...mories of address data are changed or lost by some reasons such as by replacement of PCB or by noises or static electricity re set original data by following procedure 1 Location Of Original Data 2 Co...

Страница 19: ...4 6 How To Call Address Mode How To Re write Address Data EW C Type 19 EW_EW C_EG_N SH e 0722...

Страница 20: ...4 7 Linearity Adjustment 1 How To Adjust Linearity EW C Type EG type 20 EW_EW C_EG_N SH e 0722...

Страница 21: ...eight Required 50g x 4 20g x1 100g x 4 20g x 1 100g x 4 50g x 4 20g x 1 200g x 4 20g x 1 Model Display EW 2200 2NM EG 2200 2NM EW 4200 2NM EG 4200 2NM EW 6200 2NM EW12000 1NM on 0 0g 0g 0g 0g 0g 0g 0g...

Страница 22: ...4 NM on 0 0g 0g 0g 0g on 1 30g 30g 30g 30g on 2 30g 60g 30g 60g on 3 30g 90g 30g 90g on 4 30g 120g 30g 120g Calibration Weight Required 20g x 4 10g x 4 20g x 4 10g x 4 Please use the weight for E2 OI...

Страница 23: ...Following does not describe the procedure of ordinary span calibration This is the procedure of calibration of the built in weight with EG scales It is necessary to adjust the linearity of the scale...

Страница 24: ...quality tolerance of the reference weight determine the accuracy of the scale Use weights of higher accuracy than the scale 3 Adjust the level beforehand The REF CAL must be done in a good environment...

Страница 25: ...lug the AC adaptor Remove the pan and pan base 2 Remove case fixing screw with a screwdriver 3 Locate two hooks beneath the scale near front Pull those two hooks toward you to lift the case up then sh...

Страница 26: ...5 1 2 EW 2200 12K 1 Remove the weighing 2 Remove case fixing screw with a screwdriver 2 places in the top and 1 place in the chassis 26 EW_EW C_EG_N SH e 0722...

Страница 27: ...g the AC adaptor Remove the pan and pan base 2 Remove case fixing screw with screwdriver 3 Locate two hooks toward you to lift the case up then shift the case to rear to release it from hooks 27 EW_EW...

Страница 28: ...5 1 4 EW 120 4 NM 28 EW_EW C_EG_N SH e 0722...

Страница 29: ...case gently until two front hooks are set securely 2 Drive in case fixing screw securely 3 Set pan base and then weighing pan on the scale 5 2 2 EW 2200 12K 1 Put the case on properly catching connect...

Страница 30: ...5 3 Sequence Of Mechanism Unit Replacement 30 EW_EW C_EG_N SH e 0722...

Страница 31: ...and EW C 1 Remove the case referring to 5 1 2 Remove four sensor cover fixing screw 3 Remove wires to the tuning fork sensor by welding solders at AJDP circuit board 4 Remove the AJDP circuit board fi...

Страница 32: ...sm unit by holding the chassis Mechanism unit fixing screws 5 3 1 2 EW 2200 12K 1 Remove the case referring to 5 1 2 Remove wires to the Tuning fork sensor by welding solders at AJDP circuit board 3 R...

Страница 33: ...Weighing Mechanism 1 Place the mechanism on the chassis Fit it with the fixing screws 2 Solder wires of the Tuning fork sensor to the AJDP circuit board 3 1 Cover the mechanism unite with the sensor c...

Страница 34: ...5 4 Plate Rib Replacement 34 EW_EW C_EG_N SH e 0722...

Страница 35: ...ng fork sensor 3 Attach the fixing jig with fixing screws for the tuning fork sensor assy The fixing jig should be attacked to the guide link 4 Remove the damaged plate rib by unscrewing and fix the n...

Страница 36: ...How to uninstall Tuning fork assy 1 Remove the mechanical unit from the chassis 2 Replace the tuning fork sensor 3 Insert shim at stopper 4 While holding guide link down to under direction tighten scr...

Страница 37: ...e referring to 5 1 2 Remove wires to the Tuning fork sensor by welding solders at AJDP circuit board 3 Remove the AJDP circuit board fixing screw 4 Unplug connectors at CN1 CN4 and CN3 with AJH CE on...

Страница 38: ...f the Tuning fork sensor to the new AJDP board 2 Plug connectors CN1 AJLF cord CN3 Calibration cord CN4 AJIF cord CN5 Battery cord 3 Place the AJDP board on the chassis Fix it with a fixing screw 4 Co...

Страница 39: ...620 1 Remove the CN3 connector Removing AJDP P C B in advance makes it easy to do it 2 Remove cut the cord band 3 Unscrew at two points 5 7 2 EG 2200 4200 1 Remove SW cord assy from AJDP circuit boar...

Страница 40: ...Weight Holder 3 Remove the side ring and disassemble the weight Weight Fixing Screw Side Ring 4 Remove the weight shaft from the mechanical main unit Weight Shaft 40 EW_EW C_EG_N SH e 0722...

Страница 41: ...5 8 How To Install Calibration Weight Unit Follow the instruction in 5 7 by the opposite order Refer to the position for the installation below 41 EW_EW C_EG_N SH e 0722...

Страница 42: ...6 1 1 EW 120 1200 and EW C 1 Remove the case referring to 5 1 2 Plug AJ battery cord to CN5 on AJDP board 3 Install AJ battery holder assy 4 Cover the scale and stick battery label above power jack o...

Страница 43: ...CN5 on AJDP board 3 Fasten the AJM battery held together into the nylon clamp which has holed the cord of the AJMIF circuit board assy Nylon Clamp AJMBT Assy 4 Cover the scale and stick the battery la...

Страница 44: ...7 Parts List 7 1 EW 220 1200 EW 220 420 620 EG 220 420 620 EW 820 1200 EG 220 420 620 44 EW_EW C_EG_N SH e 0722...

Страница 45: ...7 2 EW 2200 12K 45 EW_EW C_EG_N SH e 0722...

Страница 46: ...7 3 EW C EW 120 4 NM EW 600 C3 NM EW 120 4 NM 46 EW_EW C_EG_N SH e 0722...

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