Overview; Electric Check Point; Rating Of Power Fuse F1; Coil Resistance Of Main Motor - Epson EPL-5700 Service Manual

EPL-5700

3.1 OVERVIEW

Like other page printers, there are many error modes in this printer, making
identification of failed parts or component more difficult. In order to solve this
problem, this chapter shows how to check and identity malfunction from the
major components, and how to identify the causes from the errors or
abnormal symptom.

3.2 ELECTRIC CHECK POINT

T T
CAUTION
Use the recommended fuses.
T T
Avoid checking the IC terminal directly by the
tester. Check the connector on the board to
judge if it is not defective or not.

3.2.1 Rating of Power Fuse F1

Table below shows rated power fuse F1.
Table 3-1. Rated Power Fuse
Power Voltage
100V type
200V type
Rev. A
F1
8A 125V
4A 250V

3.2.2 Coil Resistance of Main Motor

By measuring the coil resistance of the main motor, the motor can be
checked if it is working all right or not. Following table shows how to
measure the coil resistance.
Table 3-2. Coil Resistance of the Motor
Motor Measuring
Point
Main Motor Pin1 and
Pin2, or Pin3
and Pin4.
Pin4
Pin1
Figure 3-1. Motor Connection
Chapter3 Troubleshooting
Measuring Value of coil
resistance
Set the multi-meter to
2.4
the resistance measuring
(25 C)
range. Connect the one
lead to one pin, and
connect the other side of
lead to the another pin
then measure the coil
resistance.
Pin3
Pin4
Pin1
10%
M
Pin2
3-1