Epson LQ-570e - Using the Tractor in the Pull Position

EPSON LQ-570e/LQ-580 Revision C
T
roubleshooting
O
verview
5
8
3.1 Overview
The printer may exhibit different symptoms for the same problem, which makes
troubleshooting more difficult. This section, however, provides simple and effective ways
to facilitate troubleshooting. The following flowchart illustrates the main steps of the
troubleshooting process.
Note: This information is necessary only for the servicers who repair to component
level. Servicers who repair to unit level can ignore this section.
Figure 3-1. Troubleshooting Process Flowchart
3.1.1 Main Component Checking Point
The following components can be checked by a simple measurement equipment such as a
multimeter.
*: Set meter to ohms. Then disconnect Motor from Main Board and check it with printer
power off.
W ARNING
Measuring the DC voltage or checking some signal waveforms
requires switching on the printer without housing covers and shield
plate. Therefore, do take care of safety operation and not damage
other unrelated componets.
Unit Level Troubleshooting
START
END
Assembly and Adjustment
Unit Repair of the
C293PSB/PSE Board
Unit Repair of the
C293MAIN Board
Unit Repair of M-5T10
Mechanism
Table 3-1. Motor Coil Resistance Test Points
Motor
Connector
Number
Test Pin Number Test Method*
Meter
Reading
PF Motor
(CN12)
1 and 3,
2 and 4
Place one lead on pin1 (pin2) and the
other lead on pin3(pin4) on each of the
test pins to check the two motor phases.
16.0Ω ±10%
(at 25°C per
one phase)
CR Motor
(CN13)
Common pin:5
Test pins: 1, 2, 3
and 4
Place one lead on pin5 and the other
lead on each of the 4 test pins to check
the two motor phases.
2.7Ω ±10%
(at 25°C per
one phase)