Internal Adjusting Procedure; Display Segment Test - KERN DE Service Manual

1.3 Internal adjusting procedure

1. Remove the bottom housing of the remote display box.
2. Connect J2 on the display board (by soldering).
3. With platform empty, turn the balance on. The display should now zero with the unit
indicator on.
4. Press the MODE key once. The display should show the internal count. The
reading should fall in the range from 9.500 to 10.000. In case out of this range,
adjust VR 1 located on the balance board inside the platform. Connecting pads on
J1 located underneath R4 on the solder side of the balance board can further
increase or reduce the reading.
5. Press the OFF key once. The display will show CAL 0 and then the required
adjusting weight. Place the corresponding adjusting weight in the centre of the
platform.
6. The display will now show CAL L and then the next adjusting weight. Place the
corresponding adjusting weight on the platform. Repeat this step until the display
shows CAL F.
7. Disconnect J2 on the display board. The adjusting is completed. Reset the zero
point and check the accuracy at different weights.
8. Install the bottom housing of the remote display box.
In case CAL E is displayed instead of CAL F, this indicates an adjusting procedure
error, or a wrong weight has been applied for adjusting. Turn the balance off and then
on and repeat the procedure.

1.4 Display segment test

Whenever the balance is turned on, all segments of the LCD will appear for 2 seconds.
Check for any missing segment.
4 DE-SH-e-0111