Control Circuit For The Exposure Lamp - Toshiba e-STUDIO453 Service Manual

6.4.3 Control circuit for the exposure lamp

SLG board
LMPON
IC9
WDTOUT
6
5VSWON
Scanner CPU
Working conditions
LMPON
5VSW ON
WDTOUT
Xenon lamp
e-STUDIO350/352/353/450/452/453
SCANNER
+5V
+5V IC4
IC21 IC6
IC34
L - - - Exposure lamp ON signal
L H - - 5V SW ON signal
H - L - Watchdog timer signal
ON OFF
+5VSW +24V
D3
Q4
Q6
Fig. 6-404
Lamp turns ON at "L"
Controls 5VSW by CPU. Normally "L"
"L" is output when CPU is out of control
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05/11
HIGH
LAMP-EXPO
LOW
Xenon lamp
INV-EXPO-360