Control Circuit For The Exposure Lamp - Toshiba e-STUDIO200L Service Manual

6.4.3

Control circuit for the exposure lamp

SLG board
LMPON
+5V
IC9
WDTOUT
5VSWON
IC34
Scanner CPU
Working conditions
LMPON L -
5VSW ON L H
WDTOUT H -
Xenon lamp O
N
e-STUDIO200L/202L/203L/230/232/233/280/282/283
SCANNER
+5V
IC4
D3
IC21 IC6
Fig. 6-12
- - Exposure lamp ON signal
- - 5V SW ON signal
L - Watchdog timer signal
OFF
+5VSW +24V
Q4
Q6
Lamp turns ON at "L"
Controls 5VSW at CPU.
Normally "L"
Level "L" when CPU is out of control
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6 - 10
HIGH
Exposure lamp
LOW
Xenon lamp
Inverter board