Abnormal Paper Feeding - Epson 890N - FX B/W Dot-matrix Printer Service Manual

EPSON FX-890/2190

3.2.4 Abnormal paper feeding

Table 3-6. Abnormal paper feeding
Step Action and Question
Parts below can be the source of this error (Chapter 4 Disassembly and Assembly)
• Front PE (Paper End) Detector (p.87)
• Harness of Front PE Detector
• Rear PE Detector (p.87)
• Harness of Rear PE Detector
• Release Detector (p.86)
• Harness of Release Detector
• Rear Paper Guide Assembly (p.90)
• PF Motor (p.83)
• PF Gear Train (p.84)
• C524MAIN Board (p.74)
Checking for foreign matters
Make sure that there are no foreign matters in the
following areas.
1
• Paper path
• PF Gear Train
♦
Is the problem solved?
Connection of sensor
Make sure that the following sensors are connected
properly:
2
• Front PE Detector (CN6)
• Rear PE Detector (CN7)
• Release Detector (CN11)
♦ Is the problem solved?
Defective sensor
Replace the defective one of the following sensors
with a new one:
3
• Front PE Detector (CN6)
• Rear PE Detector (CN7)
• Release Detector (CN11)
♦
Is the problem solved?
Troubleshooting
Step
Yes No
4
5
6
Problem
Go to Step 2
solved
7
8
Problem
Go to Step 3
solved
Replace the
defective Go to Step 4
sensors.
Troubleshooting Based on Symptoms
Table 3-6. Abnormal paper feeding
Action and Question
Harness of sensor
Replace the defective harness of the following
sensors with a new one:
• Front PE Detector (CN6)
• Rear PE Detector (CN7)
• Release Detector (CN11)
♦
Is the problem solved?
Paper changeover mechanism
♦
Is the paper feeding direction switched when you
operate the release lever?
Paper feed mechanism
With power turned off, check to see if you can feed
paper by turning the platen knob by hand.
♦
Can paper be fed by turning the platen knob by
hand?
PF Motor
Replace the PF Motor with a new one.
♦ Is the problem solved?
Main Board
Replace the Main Board with a new one.
♦
Is the problem solved?
Revision B
Yes No
Replace the
defective Go to Step 5
harness.
Check PF
Go to Step 6 Gear Train
(p.84)
Check the
Go to Step 7 paper feed
mechanism
Replace the PF
Go to Step 8
Motor.
Go to 3.2.11
Replace the
Electrical
Main Board.
Noise (p.62)
57