General Description - Epson Stylus COLOR 1520 Service Manual

5.1 General Description

This section describes procedures for isolating the failure unit in 2 levels; unit level troubleshooting and
the component level troubleshooting. You are to refer to the flowchart below to isolate the defective unit
and perform repair at the component level. Table 5-1, Table 5-2 and Table 5-3 show the coil resistance for
the CR motor and PF motor, sensor status , and Error codes and solution respectively.
Motor Connector
No.
CR motor CN14
PF motor CN15
Rev. A
Figure 5-1. Troubleshooting Flowchart
Table 5-1. Coil Resistance for the Motors
(Set the multimeter to Ohms. Be sure to
Test pin No.
unplug the power cable from the AC inlet
and disconnect the harnesses from the
MAIN board.)
Common pin :5, Place one lead to the pin 5 and the other to
Test pins : 1, 2 each of the test pin 1, 2, 3 and 4 to check
3 and 4 the coil resistance of each phase of the
motor.
Pin 1 and 3 or Place one lead to the Pin 1 or 2 and the
pin 2 and 4. other to the 3 or 4 to check the coil
resistance of the phase 2 of the motor.
Test method
Troubleshooting
Meter
reading
5 7%
(at 25••, per
phase)
10 10 %
(at 25••,)
5-1