Canon NP6621 Service Manual page 63

5. Inputs to the DC Controller PCB (5/5)
Service switch PCB
Service switch
SW850
Density correction volume
VR850
AE sensor
adjustment volume
VR851
AE sensor (2/2)
COPYRIGHT © 1998 CANON INC.
SRSW
+5V
J306-7
-8
CDC
-9
Figure 3-107
CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
OPERATIONS AND TIMING
DC controller PCB
When the switch turns on, '0'.
(starts service mode)
Adjusts the developing DC bias
3–7