Epson EPL-N1200 Service Manual - Page 119

Table 5-14., Main Motor Doesn't Rotate Correctly, Table 5-15. The LCD Displays SERVICE REQ. E0005

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EPL-N1200 Service Manual Troubleshooting Table 5-14. Main Motor Doesn't Rotate Correctly Cause Step Checkpoint Finding Solution The main motor coil may be open or shorted. The power supply board may be dead. Disconnect connector CN5 on the power supply board and check the coil resistance between: pin 1 and pin 2; pin 2 and pin 3; pin 4 and pin 5; and pin 5 and pin 6 (4 points total) on the disconnected cable side of the connector No using a multimeter. Pin 1 - Pin 2 Pin 2 - Pin 3 Pin 4 - Pin 5 Pin 5 - Pin 6 Are resistances of all four points approximately 4 ohms? 1 If any coil is shorted, check the main motor drive circuit using the following procedure: 1. Set the multimeter to voltage range. 2. Place the (+) terminal of the multimeter on pins 1, 3, 4, or 6 of connector CN5 on Yes the power supply board. 3. Place the (-) terminal on pin 2 of connector CN7 of the power supply board (GND). With power on, does the multimeter detect voltage? 2- - Replace the main motor. Replace the power supply board. Replace the power supply board. Table 5-15. The LCD Displays SERVICE REQ. E0005 Cause Step Checkpoint Finding Solution Connector CN4 on the power siupply board may be disconnected. The fan motor may be dead. Is connector CN4 on the 1 power siupply board disconnected? 2- Yes Connect it. - Replace it. Table 5-16. The LCD Displays SERVICE REQ. E0006 Cause Step The optical unit may be bad. 1 - The engine controller board may be bad. 2 - Checkpoint Finding - - Solution Replace the optical unit. Replace the engine controller board. Rev. A 5-7

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Table 5-14.
Main Motor Doesn’t Rotate Correctly
Cause
Step
Checkpoint
Finding
Solution
The main motor coil may
be open or shorted.
1
Disconnect connector CN5
on the power supply board
and check the coil resistance
between: pin 1 and pin 2; pin
2 and pin 3; pin 4 and pin 5;
and pin 5 and pin 6 (4 points
total) on the disconnected
cable side of the connector
using a multimeter.
Pin 1 — Pin 2
Pin 2 — Pin 3
Pin 4 — Pin 5
Pin 5 — Pin 6
Are resistances of all four
points approximately 4 ohms?
No
Replace the main
motor.
If any coil is shorted, check
the main motor drive circuit
using the following procedure:
1. Set the multimeter to
voltage range.
2. Place the (+) terminal of the
multimeter on pins 1, 3, 4,
or 6 of connector CN5 on
the power supply board.
3. Place the (-) terminal on
pin 2 of connector CN7 of
the power supply board
(GND).
With power on, does the
multimeter detect voltage?
Yes
Replace the power
supply board.
The power supply board
may be dead.
2
—
—
Replace the power
supply board.
Table 5-15. The LCD Displays SERVICE REQ. E0005
Cause
Step
Checkpoint
Finding
Solution
Connector CN4 on the
power siupply board may
be disconnected.
1
Is connector CN4 on the
power siupply board
disconnected?
Yes
Connect it.
The fan motor may be
dead.
2
—
—
Replace it.
Table 5-16.
The LCD Displays SERVICE REQ. E0006
Cause
Step
Checkpoint
Finding
Solution
The optical unit may be bad.
1
—
—
Replace the
optical unit.
The engine controller board
may be bad.
2
—
—
Replace the
engine controller
board.
EPL-N1200 Service Manual
Troubleshooting
Rev. A
5-7