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Service Manual
TFKB- & TCKE-B
KERN FKB CKE
Type TFKB- & TCKE-B
Version 1.0
11/2022
GB
KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: info@kern-
sohn.com
Tel: +49-[0]7433-
9933-0
Fax: +49-[0]7433-9933-
149
Internet: www.kern-
sohn.com

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Summary of Contents for KERN FKB CKE

  • Page 1 KERN & Sohn GmbH Ziegelei 1 Tel: +49-[0]7433- 9933-0 D-72336 Balingen Fax: +49-[0]7433-9933- E-Mail: info@kern- sohn.com Internet: www.kern- sohn.com Service Manual TFKB- & TCKE-B KERN FKB CKE Type TFKB- & TCKE-B Version 1.0 11/2022...
  • Page 2: Table Of Contents

    TFKB-TCKE-B-SH-e-2210 KERN TFKB- & TCKE-B Version 1.0 – 11/2022 Servicemanual Table of contents Basic Information................... 3 Introduction ....................3 Feature overview.................... 4 Service Menu ....................5 Adjustment procedure ........................ 6 Linearization Procedure......................7 Maintenance ....................9 Service, maintenance ......................... 9 Error Codes ..........................
  • Page 3: Basic Information

    1 Basic Information 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 must be restored. Only original spare parts should be used. 2 Introduction This service manual covers the TFKB- &...
  • Page 4: Feature Overview

    Setup menu • Service menu • Kern Communication Protocol (KCP) • Kern Universal Port (KUP) interface, VGA-15 female connector • Standard RS232 interface, DB-9 female connector • Optional external RS-232 interface / Signal light through KUP • Optional external USB device interface through KUP •...
  • Page 5: Service Menu

    4 Service Menu Hold [ON/OFF] + [TARE] button during power up self-test to enter the Service Menu. Press ➔ button to select / confirm / shift right Press  button to go back / exit / shift left Press  button to scroll down / decrease digit value Press ...
  • Page 6: Adjustment Procedure

    4.1 Adjustment procedure Turn the scale on and allow the scale to acclimatize and stabilize for sufficient time. Press and hold the ON/OFF and TARE key to enter setup menu. Display shows cal. Press ➔, display show calext. Press ➔, display show the first selectable calibration weight. Press ...
  • Page 7: Linearization Procedure

    4.2 Linearization Procedure Note: Make sure correct keyboard panel is connected to the main board. Allow the scale to acclimatize and stabilize for sufficient time. Turn on the scale, press and hold ON/OFF and TARE key immediately to enter the service menu.
  • Page 8 Note: Make sure the standard weights below are available for calibration. Calibration Weight Calibration Weight (kg) (kg) CKE Type FKB Type 3-point 5-point 3-point 5-point TCKE 6K-5-B TFKB 6K-5-B TCKE 8K-5-B TFKB 8K-5-B TCKE 16K-4-B TFKB 16K-4-B TCKE 16K-5-B TFKB 16K-5-B TCKE 36K-4-B TFKB 36K-4-B TFKB 36K-4B-B...
  • Page 9: Maintenance

    5 Maintenance 5.1 Service, maintenance The appliance may only be opened by trained service technicians who are authorized by KERN. Disconnect the scales before opening. 5.2 Error Codes Error message Explanation zerohi Zero too high at power up zerolo Zero too low at power up...
  • Page 10: Trouble Shooting

    5.3 Trouble Shooting Power on  Full Segments? If no display, - check battery / power adaptor, - check connection between keyboard—main board, - check connection between battery / power adaptor—main board. If missing segments, - check fixing of LCD frame, zebra connector under LCD. ...
  • Page 11: Exchange Of Components

    6 Exchange of components 6.1 Spare parts list TKFB: Main board – high resolution 2.51.01.09280800 Main board – low resolution 2.51.03.09280800 6.01.45.09281500 Panel keyboard TFKB 4.37.10.03802000 Adjustable foot 4.37.13.09421900 Battery door 4.23.01.09550000 Battery holder 4xAA 4.33.03.09283700 Rubber weight buffer 4.37.11.09280901 Hook cover 3.23.02.09280100 Hook two...
  • Page 12: Exchange Of Components

    6.3 Exchange of components Below components can be replaced without opening the device: 4.37.10.03802000 Adjustable foot 4.37.13.09421900 Battery door 4.37.08.16820900 WiFi door 4.23.01.09550000 Battery holder 4xAA 4.33.03.09283700 Rubber weight buffer 4.37.11.09280901 Hook cover 6.4 Replacement of Panel Keyboard 1. Open the device by removing the 8 screws 2.
  • Page 13: Technical Drawings

    7 Technical drawings 7.1 Wiring Diagram 7.2 Component Diagram High resolution: Low resolution: TFKB-TCKE-B-SH-e-2210...
  • Page 14: Functional Block Diagram

    7.3 Functional Block Diagram 7.4 Schematic Diagram TFKB-TCKE-B-SH-e-2210...
  • Page 15 TFKB-TCKE-B-SH-e-2210...
  • Page 16 TFKB-TCKE-B-SH-e-2210...

Table of Contents