Unit Repair; Power Supply Circuit - Epson L-1000 Technical Manual

REV.-A

5.3 UNIT REPAIR

Unit repair is comprised of three parts:
(3) repair of the printer mechanism.
This section describes (1) power supply circuit unit repair. If (2) control circuit, or (3) printer mechanism need
repair, use the diagnostic tool introduced in Section 5.1.1.

5.3.1 Power Supply Circuit

This section indicates possible causes and check points for differences in the power supply circuit. The check-
points include waveforms for normal operation. By referring to the checkpoints, determine the defective com-
ponent and perform the proper repair. Table 5-6 has the following four columns:
LQ-500/ L-1000
repair of the power supply circuit; (2) repair of the control circuit;
(1)
Table 5-5. Power Supply Circuit Parts List
TROUBLESHOOTING
5-11