Service manual

EPSON LX-300+ Revision A
Disassembly and Assembly Overview 66
4.1.3 Service Checks After Repair
Before returning the printer back to the user, use the check list below to
confirm the quality of the repaired printer.
Table 4-3. Check List for Repaired Printer
Category Component Item to Check Check
Printer
Mechanism
Printhead
Is dot missing?

OK

NG
Are any wires broken?

OK

NG
Carriage
mechanism
Does carriage move smoothly?

CR movement is not noisy?

CR mechanism is not dirty?

CR mechanism is not oily?

OK

NG
Is the CR motor assembly at the
correct temperature?
(Not overheating?)

OK

NG
Paper feed
mechanism
Is paper advancing smoothly?

PF movement is not noisy?

PF mechanism is not dirty?

PF mechanism is not oily?

OK

NG
Is the PF motor assembly at the
correct temperature?
(Not overheating?)

OK

NG
Paper path
Are all the types of paper fed
smoothly?

OK

NG
Does the tractor feed paper
smoothly?

OK

NG
Is the paper path clear of
obstructions?

OK

NG
Is the platen free of damage?

OK

NG
Ribbon
mask
Is the ribbon mask free of
distortion?

OK

NG
Test printing Is the test printing successful?

OK

NG
Online
printing
Is the online printing successful?

OK

NG
Adjustment
Printhead
Is the platen gap adjusted
correctly?

OK

NG
Is Bi-d adjustment value correct?

OK

NG
Initial
setting
Have all user changeable
settings been reset to the default
value?

OK

NG
Version Up
ROM
version
Latest ROM version ________

OK

NG
Transportation
Ink ribbon Is ribbon removed?

OK

NG
accessories
Are all the relevant parts
included in the shipment?

OK

NG
Table 4-3. Check List for Repaired Printer
Category Component Item to Check Check