Toshiba e-studio 202L - Control Circuit for the Exposure Lamp

e-STUDIO200L/202L/230/232/280/282 SCANNER June 2004 © TOSHIBA TEC
6 - 10
6.4.3 Control circuit for the exposure lamp
SLG board
Fig. 6-12
Working conditions
LMPON L - - - Exposure lamp ON signal Lamp turns ON at “L”
5VSW ON L H - - 5V SW ON signal Controls 5VSW at CPU.
Normally “L”
WDTOUT H - L - Watchdog timer signal Level “L” when CPU is out of control
Xenon lamp O
N
OFF
Exposure lamp
IC4
IC6IC21
IC34
IC9
+5VSW
+5V
+5V
Q4
D3
Q6
+24V
LOW
HIGH
LMPON
5VSWON
WDTOUT
Scanner CPU
Inverter board
Xenon lamp