2. Metering Circuit Malfunctions
A. External Observations:
Bar graph indications are high or "over."
"Spot-Auto" speeds fast.
"Auto" speeds fast or normal
"Manual" speeds normal.
OLYMPUS OM-4, PAGE 13
B. External Observations:
Bar graph indicates low or "under."
"Spot-Auto" speeds slow,
"Auto" speeds slow or normal
"Manual" speeds normal.
First, check bar graph response to light, ASA, and AV
changes to isolate problem. Follow the same pro-
cedure as 2-A, but look for the following:
1, Low voltage at pin 7, IC-102.
2, Open connections to VR-105 and VR-106,
3, Open connection to, or poor contact of, AV-VR
wiper.
4, Solder bridge around SV-VR terminals or shorted
wiring,
5, Short between pins 67, 68, 69, IC-102.
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