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EXPOSURE
3.6.1 ADS Circuit
PD-
401
6
D401
IC401
7
5
LAMP401
The ADS circuit is powered by +5 volts, which is provided at CN401-1 for the
detection circuit and CN401-6 for the lamp. The CPU resets the ADS by
dropping CN401-4 to 0 volt. This discharges C403 to reset the peak hold
function. The resistance of PD401 varies with the strength of the light striking
it. The two op-amps amplify the effect of the change in PD401 and output the
ADS signal at CN401-3.
R404
R401
C404
2
8
IC401
3
4
R403
C403
2-14
1
C401
R402
C402
31 December 1992
CN401-1
Vcc(+5V)
CN401-3
ADS:OUT
ADS ADJUST
CN401-5
CN401-2
C-GND
ADS RESET
CN401-4
Vcc(+5V)
CN401-6
SENSOR LAMP
CN401-7
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