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Part 5: Maintenance
5. TROUBLESHOOTING
5.1 Troubleshooting
5.1.1 Overview
This chapter consists of the following two sections on subsequent pages: "Error
condition diagnosis" for diagnosing the problem when the cause is unknown and
"Symptoms" for resolving problems whose cause is known.
If the cause of the problem is unknown, diagnose the problem. And if the cause is
known, follow the countermeasures to resolve the problem.
5.1.2 Troubleshooting cautions
1. Before troubleshooting, make sure the connectors and ribbon cable are properly
connected. If the problem occurs at random, be sure to check the connections.
2. When servicing the printer with its outer casing removed and the AC adapter
connected, beware of electrical shocks and PCB short circuiting.
3. Troubleshooting is described in flowchart form.
The following symbols are used in the flowcharts.
Start/End
4. If there is a problem with the printing quality or paper feeding, first check that the
printer's installation location and paper meet the required specifications. Also
check that the paper select lever and the paper thickness lever are set correctly
and that the paper is loaded properly.
5. After replacing parts or repairing the printer, be sure to make a test print to
confirm that the problem has been fixed.
If the problem still persists, troubleshoot again while skipping the steps already
executed.
Example 1
Procedure
Judgement
No
Print defects ?
Yes
1. Replace the ink
cartridge
2. Replace the BJ
cartridge
Print defects
No
even after
cartridge
replacement?
Yes
1. Replace the
· Carriage ribbon cable faulty
logic board
5-6
Action/Replace
Jump
END
END
BJC-2000
Stop
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