Epson 890N Service Manual - Page 56

No LED on Control Panel lights up even with power turned - 890 lights

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EPSON FX-890/2190 Revision B 3.2.2 No LED on Control Panel lights up even with power turned on Table 3-4. No LED on Control Panel lights up Step Action and Question Yes No Parts below can be the source of this error (Chapter 4 Disassembly and Assembly) • Fuse • Power Switch • Control Panel (p.72) • Harness of Control Panel • 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 Make sure that the following connectors are connected properly: 2 • Power Supply Board connector (CN1) • Power Supply Board ~ Main Circuit Board (CN2~CN14) Problem solved Go to Step 3 ♦Is the problem solved? Connection of harness of Control Panel Make sure that the connectors of Control Panel ~ 3 Main Circuit Board (CN1 ~ CN20) are connected properly. Problem solved Go to Step 4 ♦Is the problem solved? Harness of Control Panel 4 Replace the harness of the Control Panel with a new one. Replace the harness. Go to Step 5 ♦Is the problem solved? Control Panel 5 Replace the Control Panel with a new one. ♦Is the problem solved? Replace the Control Panel. Go to Step 6 Table 3-4. No LED on Control Panel lights up Step Action and Question Yes No 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 Main Board. Go to 3.2.11 Electrical Noise (p.62) 3.2.3 Abnormal operation of Carriage at power on Table 3-5. Abnormal Carriage operation at power on Step Action and Question Yes No Parts below can be the source of this error (Chapter 4 Disassembly and Assembly) • HP (Home Position) Detector (p.78) • Harness of HP Detector • CR Motor (p.81) • C524MAIN Board (p.74) Connection with connectors 1 Make sure that the connectors on the Main Board are connected properly. ♦Is the problem solved? Problem solved Go to Step 2 Defective CR HP Detector 2 Replace the CR HP Detector with a new one. ♦Is the problem solved? Replace the CR HP Detector. Go to Step 3 Defective harness of CR HP Detector 3 Replace the harness of CR HP Detector with a new Replace the one. harness of CR Go to Step 4 HP Detector. ♦Is the problem solved? Defective CR Motor 4 Replace the CR Motor with a new one. ♦Is the problem solved? Replace the CR Motor. Go to Step 5 Main Board 5 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) Troubleshooting Troubleshooting Based on Symptoms 56

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EPSON FX-890/2190
Revision B
Troubleshooting
Troubleshooting Based on Symptoms
56
3.2.2
No LED on Control Panel lights up even with power
turned on
3.2.3
Abnormal operation of Carriage at power on
Table 3-4.
No LED on Control Panel lights up
Step
Action and Question
Yes
No
Parts below can be the source of this error (
Chapter 4 Disassembly and Assembly
)
•
Fuse
•
Power Switch
•
Control Panel
(p.72)
•
Harness of Control Panel
•
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 following connectors are
connected properly:
•
Power Supply Board connector (CN1)
•
Power Supply Board ~ Main Circuit Board
(CN2~CN14)
♦
Is the problem solved?
Problem
solved
Go to Step 3
3
Connection of harness of Control Panel
Make sure that the connectors of Control Panel ~
Main Circuit Board (CN1 ~ CN20) are connected
properly.
♦
Is the problem solved?
Problem
solved
Go to Step 4
4
Harness of Control Panel
Replace the harness of the Control Panel with a new
one.
♦
Is the problem solved?
Replace the
harness.
Go to Step 5
5
Control Panel
Replace the Control Panel with a new one.
♦
Is the problem solved?
Replace the
Control Panel.
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)
Table 3-5.
Abnormal Carriage operation at power on
Step
Action and Question
Yes
No
Parts below can be the source of this error (
Chapter 4 Disassembly and Assembly
)
•
HP (Home Position) Detector
(p.78)
•
Harness of HP Detector
•
CR Motor
(p.81)
•
C524MAIN Board
(p.74)
1
Connection with connectors
Make sure that the connectors on the Main Board
are connected properly.
♦
Is the problem solved?
Problem
solved
Go to Step 2
2
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 3
3
Defective harness of CR HP Detector
Replace the harness of CR HP Detector with a new
one.
♦
Is the problem solved?
Replace the
harness of 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
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)
Table 3-4.
No LED on Control Panel lights up
Step
Action and Question
Yes
No