Table 5-16. The Lcd Displays Service Req; Table 5-17. The Lcd Displays Service Req - Epson EPL-5000 Service Manual

Table 5-16. The LCD Displays SERVICE REQ.

Cause
The connector for the
thermistor may be
disconnected.
The board maybe
dead.
The heater lamp or thermal
fuse in fusing unit maybe
bad.
The board maybe
dead.

Table 5-17. The LCD Displays SERVICE REQ.

Cause
The main motor coil may
be open or shorted.
The board maybe
dead.
5-6
Checkpoint
Step
I the connector for the
S
1
thermistor disconnected?
Does the heater lamp
remain lit up until an error
occurs?
Does the heater lamp come
3
on at power on?
—
Step
Disconnect connector
on the 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
Pin 1 — Pin 2
Pin 2 — Pin 3
Pin 4 — Pin 5
Pin 5 — Pin 6
Are the resistances of all four
points approximately 7 ohms'
If any coil is shorted, check
the main motor drive circuit
using the following procedure
1. Set the
voltage.
2. Place the (-) terminal of
on pins 1, 3, 4,
or 6 of connector
the board.
3. Place the terminal on
pin 6 of connector
the board
With power on, does the
detect current?
—
2
Laser 1000/1500 Service Manual
Finding
Yes Connect it.
Replace the
Yes
Replace the heater
No lamp or thermal
fuse in fusing unit.
Replace the
—
Finding
No
to
Yes
on
of
—
Solution
board.
board.
Solution
the main
the
board.
the
board.
Rev.