Control Circuit For The Exposure Lamp - Toshiba e-STUDIO 200L Service Manual

6.4.3

Control circuit for the exposure lamp

SLG board
LMPON
IC9
WDTOUT
5VSWON
IC34
Scanner CPU
Working conditions
LMPON L
5VSW ON L
WDTOUT H
Xenon lamp O
N
e-STUDIO200L/202L/230/232/280/282 SCANNER
+5V
+5V IC4
D3
IC21 IC6
- - - Exposure lamp ON signal
H - - 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