Control Circuit For The Exposure Lamp - Toshiba e-STUDIO200L/230/280 SERIES 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
ON
e-STUDIO200L/230/280 SCANNER
+5V
IC4
D3
IC21 IC6
Exposure lamp ON signal
- -
- - 5V SW ON signal
L - Watchdog timer signal
OFF
+5VSW +24V
Q4
Q6
Fig.6-12
Lamp turns ON at "L"
Controls 5VSW at CPU.
Normally "L"
Level "L" when CPU is out of control
6 - 10
HIGH
Exposure lamp
LOW
Xenon lamp
Inverter board
June 2004 © TOSHIBA TEC