Table 5-3. The Printer Does Not Operate At All; Table 5-5. The Lcd Displays Printer Open; Table 5-6. The Lcd Displays Paper Out - Epson EPL-N1200 Service Manual

EPL-N1200 Service Manual

Table 5-3. The Printer Does Not Operate at All

Cause
Connector CN1 on the
power supply board may be
disconnected.
The fuse on the power
supply board may be blown.
Connector CN3 on engine
controller board may be
disconnected.
The power supply board
may be dead.
The engine controller board
may be dead.
Table 5-4. The Printer Does Not Start RAM Check
Cause
The main controller board
(C205 MAIN board) may be
dead.
The control panel may be
dead.

Table 5-5. The LCD Displays Printer Open

Cause
The interlock switch terminal
connector may be
disconnected.
The interlock switch position
may be incorrect.
The interlock switch may be
dead.
The power supply board
may be dead.
Cause
The paper empty sensor
flag position may be
incorrect.
The paper empty sensor
may be dead.
Rev. A
Step Checkpoint
Is connector CN1 on the
1 power supply board
disconnected?
Is fuse F1 or F2 blown on the
2
power supply board?
Is connector CN3 on the
3 engine controller board
disconnected?
With the power on, is there an
output of +5 VDC between pin
4 1, 2, or 3 (+) and pin 4, 5, or 6
(–) for CN3 on engine
controller board?
5 —
Step Checkpoint
If you change the C205 MAIN
1 board, does the printer start
the RAM check?
2 —
Step Checkpoint
Is interlock switch terminal
1
connector disconnected?
Does the switch turn on
2
when the top cover is
closed?
Does the switch toggle?
3
(Check with multimeter.)
4 —

Table 5-6. The LCD Displays Paper Out

Step Checkpoint
Is paper empty sensor flag
1
position OK?
2 —
Troubleshooting
Finding Solution
Connect CN1 on
Yes power supply
board.
Yes Replace the fuse.
Connect CN3 on
Yes engine controller
board.
Replace the
No power supply
board.
Replace the
— engine controller
board.
Finding Solution
Replace the C205
Yes
MAIN board.
Replace the
—
control panel.
Finding Solution
Connect the
terminal connector
Yes
on the interlock
switch.
Reseat the
No
interlock switch.
Replace the
No
interlock switch.
Replace the power
—
supply board.
Finding Solution
Reseat the paper
No
empty sensor flag.
Replace the paper
—
empty sensor.
5-3