Canon BJC-55 Service Bulletin page 191

BJC-50
7. Faulty Interface
<Measure>
Put the printer off-line
and do a test print.
Is the test
result good?
Yes
(Normal)
Check the settings of
the host computer and
printer.
• Emulation
• Printer driver setting
• Font
Are all settings
correct?
Yes
(Correct)
Set the printer to dump
mode. Send data from
the host computer and
print it.
Do transmitted
data and received
data match?
No
1. Replace the interface
cable.
2. Replace the control
board.
<Symptom>
• No printing
• An unspecified font is used to print characters.
• Text is printed in an unspecified color.
<Cause>
The printer driver is set incorrectly.
The interface cable is defective.
The control board is defective. (Printer)
Do a Demonstration pattern print.
Hold down the POWER button until the beeper sounds once and
manual feed a sheet of paper. Press the RESUME button to print
out the Demonstration pattern print.
No
Replace the control
board.
No
Correct settings.
Do a dump mode test print.
Hold down the POWER button until the beeper sounds 5 times and
manual feed a sheet of paper. The printer stands by for data
transmission from the host computer.
Yes
END
•
The interface connector or ASIC is defective.
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Part 5: Maintenance