Controlling The Scanning Lamp - Canon GP215 Service Manual

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3. OPERATIONS AND TIMING
E. Controlling the Scanning Lamp
1. Outline
The scanning lamp is a fluorescent lamp and is controlled by the composite power supply PCB (Figure
3-206) for the following:
• Controlling the scanning lamp pre-heating
• Turning ON/OFF the scanning lamp
• Controlling the intensity of the scanning lamp
Composite power supply PCB
T101
T101
Drive
circuit
DC controller PCB
3–24
COPYRIGHT © 1996 CANON INC.
Scanning
Scanning
lamp
lamp ON
pre-heat
circuit
circuit
Logic circuit
Q605
CPU
IC 102
Gate array
IC101
CPU
Figure 3-206
CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
Scanning lamp
(fluorescent lamp)
T501
FLS
Scanning lamp
intensity sensor

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