Canon PC400 Service Manual - Page 59

I. Process Description

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CHPTER 4 IMAGE FORMATION SYSTEM I. PROCESS DESCRIPTION A. Outline The copier's image formation system has the following functions: • Controls the scanning lamp. • Controls the primary charging. • Controls the transfer charging. • Controls the developing bias. Lamp intensity sensor Scanning lamp AE sensor Primary charging roller J621-4 -2 Control panel PCB J601-10 -4 Lens array Developing cylinder Photosensitive drum Transfer charging roller Lamp intensity sensor signal (LID) AE signal (AE) Lamp ON command (LAPWM) Primary corona high voltage Static eliminator Transfer charging high voltage Developing bias J202-13 -19 DC controller/DC power supply PCB Note : The AE sensor is provided for the PC420/430/FC220 only. Figure 4-101A COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-1

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COPYRIGHT © 1998 CANON INC.
CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHPTER 4 IMAGE FORMATION SYSTEM
4-1
I. PROCESS DESCRIPTION
A. Outline
The copier’s image formation system has the following functions:
• Controls the scanning lamp.
• Controls the primary charging.
• Controls the transfer charging.
• Controls the developing bias.
Figure 4-101A
Lamp intensity sensor
AE sensor
Scanning
lamp
Primary
charging
roller
Lens
array
Developing
cylinder
Transfer
charging
roller
Control panel
PCB
Lamp intensity sensor
signal (LID)
AE signal (AE)
Lamp ON command (LAPWM)
Primary corona high voltage
Transfer charging high voltage
Developing bias
DC controller/DC power supply PCB
J621-4
-2
J601-10
-4
-19
J202-13
Static eliminator
Note :
The AE sensor is provided for the PC420/430/FC220 only.
Photosensitive
drum