30
RC-F-48.TIF
RC-F-49.TIF
RC-F-57.TIF
Repairing the Electronics
When repairing RC-/MC-balances, we recommend that you exchange
complete component groups if a defect is located, because the two PCBs
form an integral unit. The temperature coefficient of both the analog PCB
(206) and the digital PCB (204) has been adjusted at the factory. These PCB-
specific data are stored in the analog EEPROM (IC220 / analog PCB) and
in the AOC (IC107/ digital PCB). Any repair work will distort these data.
Exchanging the Display PCB
– Disconnect the balance from AC power
– Now remove the 5 screws (V) from the lower part of the display housing
(506).
– Slightly lift the display module (501/502) from the display housing (506).
– Unplug the connecting cable (505) from the display PCB (508) and dis-
connect the grounding cable (
⊥
) from the display housing (506).
– Now remove the complete display module (501/502) along with the
display PCB (508).
– Unplug the keypad (502) from the display PCB (508).
– Then detach the old PCB (508) from the display module (501 / 502).
– Transfer the grounding cable (
⊥
) from the old to the new display PCB
(508).
– Now place the new display PCB (508) in the display module (501 /
502), plug the keypad (502) back into the socket and fasten the PCB
(508) to the display module (501 / 502).
