Olympus OM-4 Handbuch zur Fehlersuche - Seite 21

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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