E208; E220; E350/E352 - Canon 1000 Service Manual

7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
27

E208

Cause Step
DC power supply
PCB 1 (upper)
Scanner motor
driver PCB,
Reader unit
controller PCB
28

E220

Cause Step
Lamp regulator
PCB, Reader
unit controller
PCB
29

E350/E352

Cause Step
Bar code label
CCD (adjust-
ment)
7-120
COPYRIGHT © 2001 CANON INC.
Checks
1 Is power present at J601 on the
scanner motor driver PCB?
J601-2 (+) — J601-1 (–): 5V
J601-4 (+) — J601-3 (–): 8V
J601-6 (+) — J601-5 (–): 24V
2 Is there a fault in the connection
between J602A on the scanner
motor driver PCB and J1306A on the
reader unit controller PCB?
Checks
1 Does the scanning lamp turn ON?
2 Is there a fault in the connection
between J1305A on the reader unit
controller PCB and J6230 on the
lamp regulator PCB?
Checks
1 Execute 'AUTO-ADJ' of 'CCD' under
'FUNC' in service mode. Is the
problem corrected?
2 Is the standard white plate soiled?
Yes/No
Yes/No
Yes/No
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
NO Check the wiring; if
normal, replace the main
power supply PCB.
YES Re-connect it.
NO Replace the following
parts in the order
indicated:
• Scanner motor driver
PCB
• Reader controller PCB
Action
NO See "The scanning lamp
fails to turn ON."
YES Re-connect it.
NO Replace the following
parts in the order
indicated:
• Lamp regulator PCB
• Reader controller PCB
Action
YES End.
YES Clean the standard white
plate. If the dirt cannot be
removed, replace the
standard white plate, and
execute 'AUTO-ADJ'.