Appendix - Canon NP6621 Service Handbook

A4, 2 copies, DIRECT, cassette 1
Power switch Copy start key
ON
Sequence STBY
Main motor (M1)
1
Pre-exposure lamp
 T
2 Primary charging (APVC)
3 Primary charging bias
4 Scanning motor (M2)
5 Scanning lamp
6
Image exposure
Blanking shutter solenoid
7
(SL3)
Transfer reference bias
8
(ATVC)
9 Transfer cleaning bias
10
Transfer bias
11 Static eliminator bias
12
Developing bias AC
13
Developing bias DC
14
Fixing heater (H1)
15
Heat exhaust fan (FM1)
16
Environment heater (H3)
17
Scanner cooling fan (FM2)
Scanner home position
18
sensor (PS1)
19 Registration sensor (PS6)
20 Separation sensor (PS7)
21 Delivery sensor (PS8)
Cassette 1 pick-up clutch
22
(CL2)
Vertical path roller clutch
23
24 Registration clutch (CL1)
25 Oil applying solenoid (SL6)
ON
INTR SCFW SCRV SCFW
AER
TTTTTT SSSSS  
Forward Reverse
-80 to -560V
High
A. GENERAL TIMING CHART
(A4, 2 copies, Direct, from copier cassette)
SCRV LSTR STBY
Low

APPENDIX

A–1