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.
Reapir of the unit
(C172 PSB/PSE board)
Motor Connector
No.
CR motor CN14
PF motor CN15
Rev. A
START
Troubleshooting at the unit level
Repar of the unit
(C211-B MAIN board)
Disassembly and adjusment
END
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.
Repair of the unit
(M-4I60 printer mechanism)
Test method
Troubleshooting
Meter
reading


5 7%
(at 25••, per
phase)


10 10 %
(at 25••,)
5-1