Canon PC980 Service Manual - Page 347

CHAPTER 11 TROUBLESHOOTING D. PCBs [9] [3] [4] [1] [7] [8] [5] [2] [6] Figure 11-604 Ref. Name [1] Noise filter PCB [2] DC controller PCB [3] Composite power supply PCB [4] High-voltage contact PCB [5] Control panel PCB [6] Sensor PCB [7] AE sensor PCB [8] Blanking PCB (front) [9] Blanking PCB (rear) Description Removes noise from the power supply. Controls sequence of operations. Supplies DC power, generates high voltage, and controls the scanning lamp. Makes an electrical connection between the machine top and bottom. Provides copying insurrections/indications. Detects paper in front of the registration roller. Detects the density of originals. Used for blanking exposure. Used for blanking exposure. 11-82 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)