Canon GP200 Service Manual page 311

9 Isolating the PCBs (printer image fault)
The printer image is faulty.
Make a copy using the copier
only.
YES
Is the copy image normal?
Execute FAX test printing:
• trial shot
• VIDEO TEST
NO
Execute test printing in
service mode.
YES
Is the test print image
normal?
Re-connect the CORE/IP
Board, FAX Motherboard,
NO
and FAX Board.
Suspect a fault in the image
formation system including
the image processor PCB.
Make a correction according Execute FAX test printing:
to the appropriate
• trial shot
instructions in the Service
• VIDEO TEST
Suspect a fault in the reading
system (mirror, lens, CCD,
analog processor PCB, etc.).
Make a correction according
to the appropriate instructions
in the Service Manual.
Try replacing the FAX
Motherboard and the
CORE/IP Board, which affect
printer images.
COPYRIGHT © 1996 CANON INC. CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
Is the Network
Interface Board (NIB)
NO installed?
Is the FAX Board
installed?
NO
YES
Print out the test print/font
list for the Printer Board:
• Test print/font list (at 300,
400, and 600 dip)
• Disable the 'REFINE'
function, and print out test
print/font list.
YES
Is the test print
image normal?
NO
Are all test print
images normal?
NO
Are only the
image at 400 dpi and the
image with the 'REFINE'
disabled good?
YES
Suspect a fault on the CIST
Board.
Disconnect and connect the
YES CIST Board, and execute test
Is the test print
printing (600/300 dpi) which is
image normal? subject to 'REFINE' processing.
If the problem is not corrected,
replace the CIST Board.
NO
Re-install the FAX Motherboard, CORE/IP Board,
Protocol Controller PCB, System Motherboard, and
Print Board; then, execute test printing. If the problem
is not corrected, perform the
following:
• If the machine is equipped with the FAX Board, try
replacing the Protocol Controller PCB and the Printer
Board.
• If the machine is not equipped with the FAX Board,
try replacing the FAX Motherboard, CORE/IP Board,
Protocol Controller PCB, System Mother Board, and
the Printer Board.
YES
Execute NIB test printing.
Is the test print
image normal?
YES
Check the following:
• NIB interface settings
(jumper connector
settings)
YES
• Network configuration
• Options used by the user
YES
NO
Is it normal?
NO
Make a correction.
Suspect a fault on the host, i.e.,
mode with a different page
description language (PDL) may
have been used. Check the printer
settings of the option used. If the
settings are wrong, explain the
situation to the user, and ask for
correction.
NO
Turn the main power switch
OFF/ON while paying
attention to LED1 (leftmost)
of the NIB.
Does LED1
YES
turn OFF in about
20 sec?
NO
Re-install the NIB and the
Protocol Controller PCB.
Then, turn OFF and then
ON the main power switch
while paying attention to
LED1 (leftmost) on the NIB.
YES Does LED1
turn OFF within about
20 sec?
NO
Replace the NIB.
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