Abnormal Operation Of Ribbon - Epson 890N - FX B/W Dot-matrix Printer Service Manual

EPSON FX-890/2190

3.2.8 Abnormal operation of ribbon

Table 3-10. Abnormal operation of ribbon
Step Action and Question
Parts below can be the source of this error (Chapter 4 Disassembly and Assembly)
• Ribbon Cartridge
• Timing Belt
• CR Motor (p.81)
• Ribbon Drive (RD) Assembly (p.92)
• C524MAIN Board (p.74)
Ribbon Cartridge
1
Defective Ribbon Cartridge
♦
Can the Ribbon Cartridge be turned by hand?
Defective Carriage
Check the operation of the Carriage and Timing
2
Belt.
♦
Does the carriage and belt operate smoothly?
Defective Ribbon Drive Assembly
Check the operation of the Ribbon Drive Assembly.
3
♦
Does the Ribbon Drive Assembly turn smoothly?
Main Board
4
Replace the Main Board with a new one.
♦
Is the problem solved?
Troubleshooting
Yes No
Replace the
Go to Step 2 Ribbon
Cartridge.
Go to 3.2.9
Abnormal
Go to Step 3 operation of
Carriage Unit
(p.61)
Replace or
lubricate the
Go to Step 3
Ribbon Drive
Assembly.
Go to 3.2.11
Problem
Electrical
solved
Noise (p.62)
Troubleshooting Based on Symptoms
Revision B
60