Canon GP215 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?
NO
Execute test printing in
service mode.
YES
Is the test print image
normal?
NO
Suspect a fault in the image
formation system including
the image processor PCB.
Make a correction according
to the appropriate
instructions in the Service
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.
COPYRIGHT © 1996 CANON INC. CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
Is the Network
Interface Board (NIB)
NO
Is the FAX Board
installed?
YES
Print out the test print/font
Execute FAX test printing:
• trial shot list for the Printer Board:
• VIDEO TEST • 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?
Re-connect the CORE/IP
Board, FAX Motherboard,
and FAX Board.
image at 400 dpi and the
image with the 'REFINE'
Execute FAX test printing:
• trial shot
• VIDEO TEST
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
Try replacing the FAX
Re-install the FAX Motherboard, CORE/IP Board,
Motherboard and the
Protocol Controller PCB, System Motherboard, and
CORE/IP Board, which affect
Print Board; then, execute test printing. If the problem
printer images.
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
installed?
NO
YES
NO
YES
Are only the
NO
disabled good?
YES
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.
Execute NIB test printing.
NO
Is the test print
image normal?
YES
Turn the main power switch
OFF/ON while paying
attention to LED1 (leftmost)
Check the following:
of the NIB.
• NIB interface settings
(jumper connector
settings)
Does LED1
• Network configuration YES
turn OFF in about
• Options used by the user
Re-install the NIB and the
Is it normal?
Protocol Controller PCB.
Then, turn OFF and then
ON the main power switch
NO
while paying attention to
LED1 (leftmost) on the NIB.
Make a correction.
YES Does LED1
turn OFF within about
NO
Replace the NIB.
20 sec?
NO
20 sec?
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