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REASSEMBLY AND ADJUSTMENT
FUJICA GS645
o
IC TA. 2F 7646F pin operations
Pin No.
Name
1
Photocell (-) input
2
S. F. T value input
3
S. F.T. L output
4
S. F. T. L output adjust
terminal
5
LED lighting width adjust
terminal
6
-----=-=
7
8
GND
9
LED terminal (Under)
10
LED terminal (Proper)
11
LED terminal (Over)
12
Battery check terminal
13
Output stabilizing terminal
14
Temperature guarantee circuit
terminal
15
IC poower supply (+)
16
Reference voltage
-54-
Operation
V2-
vl
373.1
About 18.2 mVjEV
20.5
=
20.5
=
18.2
LED display value adjustment
ON at 0.5V or below, OFF at 1.5V
or higher
ON at 0.5V or below, OFF at 1.5V
or higher
ON at 0.5V or below, OFF at 1.5V
or higher
LED goes out when voltage is about
2.0V
LED is unstable under OPEN state
Battery voltage
1.25V
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