7. Auxiliary Functions
A. External Observations:
No Self-Timer function.
LCD normal.
Shutter functions normal
•^^^^^^m
B. External Observations:
LED or Piezo Buzzer not working.
Self timer function is normal.
1. For LED, apply B- to pin 41, IC-ID2 through 1000
ohm probe. If LED flashes, IC-102 may be
defective. If no LED, check:
B- to LED
(Black wire from TP-1.) Also, Q-401 and LED.
2. For Piezo Buzzer, check output at pin 52, IC-102.
If signal is present, check connections to Tinier
Board and Buzzer Switch,
OLYMPUS OM-4, PAGE 21
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