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REASSEMBLY AND ADJUSTMENT
FUJICA GS645
10. Adjustment of electrical circuit
o
Wiring
Perform wmng by referring to the wiring diagram.
No short - circuit or bridged soldering should exist.
Pay particular attention on the lead wires extended from the shutter assembly so
that they are not held between parts or they are not pulled unreasonably.
The lead wires may be broken.
o
Adjustment of S. F. T. value potentiometer voltage
To adjust this voltage, use variable resistor VR1.
Measure voltage across the terminals to which blue and green lead wires are
connected from the shutter assembly.
Adjust voltage so that V
2 · -
V
1
=
373.1 ±2 mV.
where,
vl
Voltage at ASA 1600 T 1/1 F3.4
Voltage at ASA 25 T 1/500 F22
o
Adjustment of voltage across IC Pin No. 5 and 16
To adjust this voltage, use VR3.
The rated voltage is 205±2 mV.
o
Adjustment of LED display
Adjust variable resistor VR2 so that the center LED lights at the following
settings.
ASA:
100
F:
5.6
T:
1/125
LV :
12 (Brightness 1800 rlx.)
In
this case, used K- value is 1.3.
-50-
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