Canon GP215, Руководство по обслуживанию

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9 Isolating the PCBs (printer image fault)
3–257
COPYRIGHT © 1996 CANON INC. CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
The printer image is faulty.
Make a copy using the copier
only.
Is the copy image normal?
NO
Is the test print image
normal?
NO
Execute test printing in
service mode.
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.
YES
YES
Is the FAX Board
installed?
YES
Execute FAX test printing:
• trial shot
• VIDEO TEST
Is the test print
image normal?
NO
Re-connect the CORE/IP
Board, FAX Motherboard,
and FAX Board.
Execute FAX test printing:
• trial shot
• VIDEO TEST
Is the test print
image normal?
NO
Try replacing the FAX
Motherboard and the
CORE/IP Board, which affect
printer images.
NO
YES
YES
Execute NIB test printing.
Is the Network
Interface Board (NIB)
installed?
NO
YES
NO
Are only the
image at 400 dpi and the
image with the 'REFINE'
disabled good?
NO
YES
YES
Is the test print
image normal?
Is it normal?
NO
YES
Make a correction.
YES
Turn the main power switch
OFF/ON while paying
attention to LED1 (leftmost)
of the NIB.
NO
Does LED1
turn OFF in about
20 sec?
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.
Does LED1
turn OFF within about
20 sec?
Replace the NIB.
NO
YES
NO
YES
Suspect a fault on the CIST
Board.
Disconnect and connect the
CIST Board, and execute test
printing (600/300 dpi) which is
subject to 'REFINE' processing.
If the problem is not corrected,
replace the CIST Board.
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.
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.
Are all test print
images normal?
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.
Check the following:
• NIB interface settings
(jumper connector
settings)
• Network configuration
• Options used by the user