Epson LX-300 Service Manual

LX-3(XI Service Manual
Thwbleahooting
5.3 REPAIRING THE MAIN BOARD ASSEMBLY
This section provides instructions for repairing a defective main
board assembly. It describes
various symptoms, likely causes, and t%eckp-oints. Checkpoints refer to pro~r waveforms,
resistance values, and other values to be checked when evaluating the operation of any potentially
faulty component. Check these values and take the appropriate action.
Note:
This section is required only for
serw”cers who repair to the component level.
Table 5-8. Repairing Problems in the Main Board Assembly
Rev.A
$11

Epson LX-300 Specifications

General

Print Method	9-pin impact dot matrix
Interface	Parallel
Paper Handling	Friction feed, tractor feed
Weight	4.4 kg
Operating Environment	Temperature: 5 - 35°C, Humidity: 10 - 80%