Canon bjc-7100 Manuale Di Servizio

This chapter consists of the following two sections: "Diagnosis" and "Action."
If you do not know the cause of a problem, consult the "Diagnosis" section.  If you do
know the cause, follow the instructions in the "Action" section.

1. Before starting diagnostic procedures, check that all connectors and cables are

correctly connected.  This is especially important if faults occur randomly.

2. If you are diagnosing faults with the printer covers removed and the AC adaptor

connected, be extremely careful to avoid electric shock to prevent shorting the
boards.

3. Follow the flowcharts when troubleshooting.
4. When diagnosing faults concerning print quality and paper feed, first check that

the installation location and print media satisfy the specifications, that the print
media is loaded correctly, and that the printer driver parameters are set correctly,
etc.

5. If you replace or service a part, be sure to make a test print to check that the fault

has been remedied.

6. The flowcharts may indicate a number of possible actions to be taken in

troubleshooting and correcting a fault.  These actions are indicated in the order
required to remedy the problem.
After each step, make a test print to see if the fault has been corrected and, if not,
proceed to the next step.

Example 1
Countermeasure 1:  After checking or replacing the carriage cable, make a test print
to check that the printer is functioning normally.
If the fault is not corrected, advance to step 2, "Replace carriage unit", and if the
problem is still not corrected, go to step 3, "Replace logic board."
7. On completion of troubleshooting, check that you have reconnected all connectors

and tightened any loosened screws, etc.

BJC-7100

Part 5: Maintenance

Start/End

Operation

Judgement

Action/Replace

Jump

Stop

1. Check/replace

carriage cable

2. Replace carriage unit

3. Replace logic board