AR-651 (serv.man10). Scanning section - Sharp Copying Equipment Service Manual (repair manual). Page 9

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AR-651/810  SCANNING SECTION  6 - 9
6. 4. 3.  Control circuit for exposure lamp
HCT00
IC16
HCT00
IC16
HCT00
IC16
P24
+5V
+5VSW
EXPON–0A
PWA–F–SLG–340
EXPON–0
WDTOUT–0
WDTEN–0
P23
IC9
WDTOUT
HC14
IC17
D1:1SS184
Q3:RN2401
Q2:RN1401
SG
Working conditions
WDTOUT-0
WDTEN-0
EXPON-0
+5VSW
Q2
Xenon lamp
State of copier
(Lamp drive signal)
H
H
H
ON
OFF
OFF
Normal operation
H
H
L
ON
ON
ON
L
X
X
OFF
OFF
OFF
Scanner CPU
overdriving
H
L
X
OFF
OFF
OFF
Call for Service
Scanner
   CPU
Xenon lamp
 Xenon lamp
lighting device
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