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Summary of Contents for KERN FCE 3K1
- Page 1 KERN & Sohn GmbH Ziegelei 1 Tel: +49-[0]7433- 9933-0 D-72336 Balingen Fax: +49-[0]7433-9933-149 E-Mail: info@kern-sohn.com Internet: www.kern-sohn.com Service manual Compact balances KERN FCE Version 1.0 4/2009 FCE-SH-e-0910...
- Page 2 KERN FCE Version 1.0 4/2009 Service manual Compact balances Table of Contents Basic Information ___________________________________________________ 3 Digital Auto Calibration Procedure _____________________________________ 3 Internal Calibration Procedure________________________________________ 4 Display Segment Test_______________________________________________ 4 Functional Block Diagram / Description _________________________________ 5 5.1 Functional Block Diagram _________________________________________________ 5 5.2 Function Description _____________________________________________________ 6...
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Page 3: Basic Information
1 Basic Information Grundlegende Hinweise The device must be repaired only by trained specialist staff or personnel with professional formation (such as a repair-specialist accredited by law concerning verification). The service manual is obligatory for repair work. After repair, original conditions of the device have to be restored. Only original spare parts should be used. -
Page 4: Internal Calibration Procedure
3 Internal Calibration Procedure 1. Remove the top housing of the scale. 2. Connect J1’ on the main board 5052-094108 by soldering the pads together (Fig.1). 3. Place scale on a hard level surface. With weighing pan installed, turn balance on. Display shall show the internal counts. -
Page 5: Functional Block Diagram / Description
5 Functional Block Diagram / Description 5.1 Functional Block Diagram Keyboard L C D Power control / 9V Battery Microprocessor Regulator & Low battery Adaptor detector digital signal Load cell Amplifier A/D Converter analog (Sensor) signal FCE-SH-e-0910... -
Page 6: Function Description
5.2 Function Description 1. Load cell This is the heart of the whole system. The load cell itself is arranged as a bridge. The resistance change of the bridge elements is proportional to the load applied on the load cell. Therefore, the output of the load cell is an analog signal, which is proportional to the load applied on the scale. -
Page 7: Trouble Shooting
6 Trouble Shooting Power on ↓ Full Segments? If no display, check battery /adaptor; connection between keyboard—main board, battery/adaptor—main board. If missing segments, check fixing of LCD frame, zebra connector under LCD. ↓ Display Zero? If display [LO], check battery>7.5v, adaptor>9v. If display [ E] , check internal count. -
Page 8: To Replace Pcb
Replace a new PCB. Connect connections from PCB to keyboard, loadcell and battery/adaptor again. 3. Assemble the top housing. 4. Perform internal calibration as described in section 3. 5. Check accuracy of scale at different weight. FCE 3K1 FCE 6K2 FCE 15K5 weight tol. -
Page 9: To Replace Load Cell Assembly
4. Assemble the top housing. 5. Perform internal calibration as described in section 3. 6. Check accuracy of scale at different weight. FCE 3K1 FCE 6K2 FCE 15K5 weight tol. -
Page 10: Schematics
9 Schematics FCE-SH-e-0910... - Page 11 FCE-SH-e-0910...
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Page 12: Components Layout
10 Components Layout FCE-SH-e-0910... -
Page 13: Fce-Sh-E
FCE-SH-e-0910...
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