Epson STYLUS 3000 Service Manual

Troubleshooting
Rev. A
5-1
0
5.3 Repair of the C172 PSB/PSE Board at Component Level
This section contains information which enables you to repair and replace the components on the
electrical board (C172 PSB/PSE). Table 5-5 lists the potential causes for each symptom in order of
possibility, with which you are able to find and repair the defective part.
Table 5-5. Component Repair of the C172 PSB/PSE Board
Symptom Condition Cause Checkpoint Solution
The printer
does not
+42 VDC is
not output.
Fuse (F1) is
open.
Check visually if the fuse is good. Replace the fuse F1.
operate at all. Transformer
(T1) is open.
Check the transformer using a
multimeter.
Replace the
transformer T1.
Q1 is dead. Check the waveform at drain.
Waveform (1)
Replace the Q1.
Q2 or Q3 is
dead.
Check the waveform at corrector.
Waveform (2)
Replace the Q2 or Q3.
PC1 is dead. Check the voltage in lowering at
the Pin 5 or 7.
Waveform (3)
Replace PC1.
+5 VDC is
not output.
L4962 is dead. Check the reference waveform
at the Pin 5.
Waveform (4)
Replace the L4962.
Check the output waveform at the
Pin 7.
Waveform (5)

Epson STYLUS 3000 Specifications

General

Brand	Epson
Model	STYLUS 3000
Category	Printer
Language	English