Trouble Shooting Guide, Standard
4/00021-2/FEA 209 544/21 B 22(26)
Measure the voltage at pin 3 of V623 (3.70 V).
If the voltage is incorrect, measure the resistance of R683 (100 kohms).
If the resistance is incorrect, replace R683.
If the voltage is correct, replace V621 and V623. Make sure R627, R628 and C681 are
mounted and correctly soldered. Measure the resistance of R682 (1 kohm).
If the resistance is incorrect, replace R682.
If the fault remains, send the unit on according to the local company directives.
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