Epson 890N Service Manual - Page 55

Troubleshooting Based on Symptoms, Printer fails to operate when power is turned - fx 890 ribbon cartridge

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EPSON FX-890/2190 3.2 Troubleshooting Based on Symptoms You can identify the defective component from the symptom displayed. Table 3-2 below lists the symptoms for various failures so that you can easily identify the problem. Based on the symptom as mentioned below, identify the problem and take a remedy by following the appropriate troubleshooting procedure given in Table 3-3 to Table 3-13. Table 3-2. Symptoms and Problems Symptom Problem Printer fails to operate Printer mechanism does not operate. when power is turned on No LED on control panel lights up. 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. Printing is faulty during self-test, but carriage operation is normal. No printing at all. Faulty printing. Some dots are missing from print. Abnormal paper feeding The printer prints but does not feed paper properly. Abnormal operation of Control Panel • Faulty LED indication • Input through switches impossible Data sent from the host computer is not printed properly. Carriage operates normally at power on, and self-test is executed correctly, but data is not printed. Data from the computer is not printed properly. Abnormal operation of ribbon • Defective ribbon cartridge • Defective ribbon feed mechanism Abnormal operation of Carriage Unit Printer mechanism does not operate. Faulty print Printer mechanism operates, but print is faulty. Printer goes into fatal • "Fatal error" is displayed on the control panel. error status when power is • After initialization operation, the printer goes into turned on. error status. Refer to p. 55 p. 56 p. 56 p. 58 p. 57 p. 59 p. 59 p. 60 p. 60 p. 62 p. 63 Revision B 3.2.1 Printer fails to operate when power is turned on Table 3-3. Printer fails to operate when power is turned on Step Action and Question Yes No Parts below can be the source of this error (Chapter 4 Disassembly and Assembly) • Fuse • HP (Home Position) Detector (p.78) • CR Motor (p.81) • PF Motor (p.83) • C524MAIN Board (p.74) • C524PSB/PSE/PSH Board (p.76) Fuse Check the electric circuit and printer mechanism, 1 and if they are not short-circuitted, replace the fuse with a new one. Problem solved Go to Step 2 ♦Is the problem solved? Connection with connectors 2 Make sure that the connectors on the Main Board are connected properly. ♦Is the problem solved? Problem solved Go to Step 3 Defective CR HP Detector 3 Replace the CR HP Detector with a new one. ♦Is the problem solved? Replace the CR HP Detector. Go to Step 4 Defective CR Motor 4 Replace the CR Motor with a new one. ♦Is the problem solved? Replace the CR Motor. Go to Step 5 Defective PF Motor 5 Replace the PF Motor with a new one. ♦Is the problem solved? Replace the PF Motor. Go to Step 6 Power Supply Board 6 Replace the Power Supply Board with a new one. ♦Is the problem solved? Replace the Power Supply Go to Step 7 Board. Main Board 7 Replace the Main Board with a new one. ♦Is the problem solved? Replace the Go to 3.2.11 Main Board. Electrical Noise (p.62) Troubleshooting Troubleshooting Based on Symptoms 55

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EPSON FX-890/2190
Revision B
Troubleshooting
Troubleshooting Based on Symptoms
55
3.2
Troubleshooting Based on Symptoms
You can identify the defective component from the symptom displayed. Table 3-2
below lists the symptoms for various failures so that you can easily identify the
problem. Based on the symptom as mentioned below, identify the problem and take a
remedy by following the appropriate troubleshooting procedure given in Table 3-3 to
Table 3-13.
3.2.1
Printer fails to operate when power is turned on
Table 3-2.
Symptoms and Problems
Symptom
Problem
Refer to
Printer fails to operate
when power is turned on
Printer mechanism does not operate.
p.55
No LED on control panel lights up.
p.56
Abnormal carriage
operation at power on.
Carriage moves away from the home position at
power on.
p.56
Carriage returns to home position correctly, but the
printer then fails to enter the READY mode.
Printing is faulty during
self-test, but carriage
operation is normal.
No printing at all. Faulty printing. Some dots are
missing from print.
p.58
Abnormal paper feeding
The printer prints but does not feed paper properly.
p.57
Abnormal operation of
Control Panel
•
Faulty LED indication
•
Input through switches impossible
p.59
Data sent from the host
computer is not printed
properly.
Carriage operates normally at power on, and self-test
is executed correctly, but data is not printed. Data
from the computer is not printed properly.
p.59
Abnormal operation of
ribbon
•
Defective ribbon cartridge
•
Defective ribbon feed mechanism
p.60
Abnormal operation of
Carriage Unit
Printer mechanism does not operate.
p.60
Faulty print
Printer mechanism operates, but print is faulty.
p.62
Printer goes into fatal
error status when power is
turned on.
•
“Fatal error” is displayed on the control panel.
•
After initialization operation, the printer goes into
error status.
p.63
Table 3-3.
Printer fails to operate when power is turned on
Step
Action and Question
Yes
No
Parts below can be the source of this error (
Chapter 4 Disassembly and Assembly
)
•
Fuse
•
HP (Home Position) Detector
(p.78)
•
CR Motor
(p.81)
•
PF Motor
(p.83)
•
C524MAIN Board
(p.74)
•
C524PSB/PSE/PSH Board
(p.76)
1
Fuse
Check the electric circuit and printer mechanism,
and if they are not short-circuitted, replace the fuse
with a new one.
♦
Is the problem solved?
Problem
solved
Go to Step 2
2
Connection with connectors
Make sure that the connectors on the Main Board
are connected properly.
♦
Is the problem solved?
Problem
solved
Go to Step 3
3
Defective CR HP Detector
Replace the CR HP Detector with a new one.
♦
Is the problem solved?
Replace the
CR HP
Detector.
Go to Step 4
4
Defective CR Motor
Replace the CR Motor with a new one.
♦
Is the problem solved?
Replace the
CR Motor.
Go to Step 5
5
Defective PF Motor
Replace the PF Motor with a new one.
♦
Is the problem solved?
Replace the PF
Motor.
Go to Step 6
6
Power Supply Board
Replace the Power Supply Board with a new one.
♦
Is the problem solved?
Replace the
Power Supply
Board.
Go to Step 7
7
Main Board
Replace the Main Board with a new one.
♦
Is the problem solved?
Replace the
Main Board.
Go to
3.2.11
Electrical
Noise
(p.62)