Epson FX 890 Service Manual - Page 34

Unit Level Troubleshooting - not feeding paper

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3.2 UNIT LEVEL TROUBLESHOOTING FX-1180/FX-880 Service Manual Chapter 3 Troubleshooting You may be able to identify the defective unit just from the symptom displayed. The table below provides the symptoms for a number of failures, so that you can easily identify the problem. Once the problem has been identified, refer to the flowchart listed in the right-hand column of the table below to determine the case of the problem. Table 3-6. Symptoms and Problems Symptom Printer fails to operate when power is on. Abnormal carriage operation at power on. Printing is faulty during self-test, but carriage operation is normal. Abnormal paper feeding Abnormal control panel operation Data sent by the host computer is printed incorrectly Problem • Carriage dose not move. • Control panel indicator LEDs do not light. • Carriage moves away from the home position at power on. • Carriage returns to home position correctly, but the printer then fails to enter the READY mode. • No printing at all. • Faulty printing  some dots are not printing. The printer prints but feeds paper incorrectly. When the LF/FF switch is pressed, no paper is fed. • Carriage operates normally at power on, and self-test is executed correctly, but data is not printed. • Data from the computer is printed incorrectly. See Page 3-5 3-6 3-7 3-8 3-9 3-10 The repair procedure flowcharts use the following symbols: START Start Preocessing Branching Forwarding to another items Return to the Start of the item Decision END END Figure 3-3. Symbols Used in the Flowcharts Rev. B 3-4

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FX-1180/FX-880 Service Manual
Chapter 3 Troubleshooting
Rev. B
3-4
3.2 UNIT LEVEL TROUBLESHOOTING
You may be able to identify the defective unit just from the symptom displayed. The table below
provides the symptoms for a number of failures, so that you can easily identify the problem. Once
the problem has been identified, refer to the flowchart listed in the right-hand column of the table
below to determine the case of the problem.
Table 3-6. Symptoms and Problems
Symptom
Problem
See Page
Printer fails to operate
when power is on.
•
Carriage dose not move.
•
Control panel indicator LEDs do not light.
3-5
Abnormal carriage
operation at power on.
•
Carriage moves away from the home position at
power on.
•
Carriage returns to home position correctly, but the
printer then fails to enter the READY mode.
3-6
Printing is faulty during
self-test, but carriage
operation is normal.
•
No printing at all.
•
Faulty printing
some dots are not printing.
3-7
Abnormal paper
feeding
The printer prints but feeds paper incorrectly.
3-8
Abnormal control panel
operation
When the LF/FF switch is pressed, no paper is fed.
3-9
Data sent by the host
computer is printed
incorrectly
•
Carriage operates normally at power on, and self-test
is executed correctly, but data is not printed.
•
Data from the computer is printed incorrectly.
3-10
The repair procedure flowcharts use the following symbols:
START
END
Start
Preocessing
Forwarding to
another items
Decision
Return to the
Start of the item
END
Branching
Figure 3-3. Symbols Used in the Flowcharts