Epson EPL-N1200 Service Manual - Page 115

Table 5-6. The LCD Displays Paper Out, The Printer Does Not Operate at All

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EPL-N1200 Service Manual Troubleshooting Table 5-3. The Printer Does Not Operate at All Cause Step Checkpoint Finding Solution Connector CN1 on the Is connector CN1 on the Connect CN1 on power supply board may be 1 power supply board disconnected. disconnected? Yes power supply board. The fuse on the power supply board may be blown. 2 Is fuse F1 or F2 blown on the power supply board? Yes Replace the fuse. Connector CN3 on engine controller board may be Is connector CN3 on the 3 engine controller board Connect CN3 on Yes engine controller disconnected. disconnected? board. With the power on, is there an The power supply board may be dead. output of +5 VDC between pin Replace the 4 1, 2, or 3 (+) and pin 4, 5, or 6 No power supply (-) for CN3 on engine board. controller board? The engine controller board may be dead. 5 - Replace the - engine controller board. Table 5-4. The Printer Does Not Start RAM Check Cause Step Checkpoint Finding Solution The main controller board (C205 MAIN board) may be dead. If you change the C205 MAIN 1 board, does the printer start the RAM check? Yes Replace the C205 MAIN board. The control panel may be dead. 2- - Replace the control panel. Table 5-5. The LCD Displays Printer Open Cause Step Checkpoint Finding Solution The interlock switch terminal connector may be disconnected. 1 Is interlock switch terminal connector disconnected? The interlock switch position may be incorrect. 2 Does the switch turn on when the top cover is closed? The interlock switch may be dead. 3 Does the switch toggle? (Check with multimeter.) The power supply board may be dead. 4- Connect the Yes terminal connector on the interlock switch. No Reseat the interlock switch. No Replace the interlock switch. - Replace the power supply board. Table 5-6. The LCD Displays Paper Out Cause The paper empty sensor flag position may be incorrect. The paper empty sensor may be dead. Step Checkpoint Finding Solution 1 Is paper empty sensor flag position OK? 2- No Reseat the paper empty sensor flag. - Replace the paper empty sensor. Rev. A 5-3

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Table 5-3.
The Printer Does Not Operate at All
Cause
Step
Checkpoint
Finding
Solution
Connector CN1 on the
power supply board may be
disconnected.
1
Is connector CN1 on the
power supply board
disconnected?
Yes
Connect CN1 on
power supply
board.
The fuse on the power
supply board may be blown.
2
Is fuse F1 or F2 blown on the
power supply board?
Yes
Replace the fuse.
Connector CN3 on engine
controller board may be
disconnected.
3
Is connector CN3 on the
engine controller board
disconnected?
Yes
Connect CN3 on
engine controller
board.
The power supply board
may be dead.
4
With the power on, is there an
output of +5 VDC between pin
1, 2, or 3 (+) and pin 4, 5, or 6
(–) for CN3 on engine
controller board?
No
Replace the
power supply
board.
The engine controller board
may be dead.
5
—
—
Replace the
engine controller
board.
Table 5-4.
The Printer Does Not Start RAM Check
Cause
Step
Checkpoint
Finding
Solution
The main controller board
(C205 MAIN board) may be
dead.
1
If you change the C205 MAIN
board, does the printer start
the RAM check?
Yes
Replace the C205
MAIN board.
The control panel may be
dead.
2
—
—
Replace the
control panel.
Table 5-5.
The LCD Displays Printer Open
Cause
Step
Checkpoint
Finding
Solution
The interlock switch terminal
connector may be
disconnected.
1
Is interlock switch terminal
connector disconnected?
Yes
Connect the
terminal connector
on the interlock
switch.
The interlock switch position
may be incorrect.
2
Does the switch turn on
when the top cover is
closed?
No
Reseat the
interlock switch.
The interlock switch may be
dead.
3
Does the switch toggle?
(Check with multimeter.)
No
Replace the
interlock switch.
The power supply board
may be dead.
4
—
—
Replace the power
supply board.
Table 5-6. The LCD Displays Paper Out
Cause
Step
Checkpoint
Finding
Solution
The paper empty sensor
flag position may be
incorrect.
1
Is paper empty sensor flag
position OK?
No
Reseat the paper
empty sensor flag.
The paper empty sensor
may be dead.
2
—
—
Replace the paper
empty sensor.
EPL-N1200 Service Manual
Troubleshooting
Rev. A
5-3