Canon 1000 Service Manual page 522

7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
Cause Step
DC power supply
CCD unit, Analog
processor PCB,
Image processor
PCB
Checking the Original Exposure System
1) Check to find out if the copyboard glass has ridden over an obstacle.
2) Clean the scanning lamp, reflecting plate, No. 1/2/3 mirror, standard white plate, and copyboard glass,
and execute 'AUTO-ADJ' for 'CCD' under 'FUNC' in service mode. Is the problem corrected?
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COPYRIGHT © 2001 CANON INC.
Checks
9 Is DC power present between the
following terminals of the analog
processor?
J2504-7 (+) — 8 (–): 5V
J2504-5 (+) — 4 (–): –8V
J2504-3 (+) — 4 (–): +8V
J2504-1 (+) — 2 (–): +15V
Yes/No
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
NO See "The DC power is
absent."
YES Try replacing the following
parts:
• CCD unit
• Analog processor PCB
• Image processor PCB