Epson EPL-N1200 Service Manual - Page 118

Table 5-12., The LCD Displays Mem Overflow, Table 5-13., The LCD Displays SERVICE REQ. E0003

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Troubleshooting EPL-N1200 Service Manual Table 5-12. The LCD Displays Mem Overflow Cause Step Checkpoint Finding Solution The optional SIMM may be bad. 1 Standard RAM may be bad. 2 Is operation OK after you remove the optional SIMM? - Yes Replace the SIMM. - Replace the C205 MAIN board. Table 5-13. The LCD Displays SERVICE REQ. E0003 Cause The connector for the thermistor may be disconnected. The engine controller board may be dead. The heater lamp or thermal fuse in fusing unit may be bad. The power supply board may be dead. Step Checkpoint 1 Is the connector for the thermistor disconnected? Does the heater lamp 2 remain lit up until an error occurs? 3 Does the heater lamp come on at power on? 4- Finding Yes Yes No - Solution Connect it. Replace the engine controller board. Replace the heater lamp or thermal fuse in fusing unit. Replace the power supply board. 5-6 Rev. A

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Table 5-12.
The LCD Displays Mem Overflow
Cause
Step
Checkpoint
Finding
Solution
The optional SIMM may be
bad.
1
Is operation OK after you
remove the optional SIMM?
Yes
Replace the SIMM.
Standard RAM may be bad.
2
—
—
Replace the C205
MAIN board.
Table 5-13.
The LCD Displays SERVICE REQ. E0003
Cause
Step
Checkpoint
Finding
Solution
The connector for the
thermistor may be
disconnected.
1
Is the connector for the
thermistor disconnected?
Yes
Connect it.
The engine controller board
may be dead.
2
Does the heater lamp
remain lit up until an error
occurs?
Yes
Replace the
engine controller
board.
The heater lamp or thermal
fuse in fusing unit may be
bad.
3
Does the heater lamp come
on at power on?
No
Replace the heater
lamp or thermal
fuse in fusing unit.
The power supply board
may be dead.
4
—
—
Replace the power
supply board.
Troubleshooting
EPL-N1200 Service Manual
5-6
Rev. A