EPSON Stylus COLOR 3000
EPSON Stylus Color 3000 Service Manual
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5.4 Component Repair of the C203 Main Board
This section provides information that enables you to repair and replace defective components on the C203
main board. Tables 5-6 lists the causes for each symptom in order of possibility.
Table 5-6. Component Repair of the C203 Main Board
Condition Cause Checkpoint Solution
Symptom: The printer does not operate at all.
Reset circuit is
defective.
Check the following signals for the
waveforms:
IC9:/RESET (Pin 1), V line (Pin
3)
IC3:OUT (Pin 6), 42 V line (Pin
2)
+5V
RE
SE
T
Waveform
6
Replace the main
board or the reset IC.
Selection of ROM
and sub gate array
is improper.
Check the waveform for one of the
following signals output from the
CPU (IC5) for a change in HIGH
and LOW:
/CS0 (Pin 1), /CS1 (Pin 2),
/CS2 (Pin128), /CS3 (Pin 127)
Waveform 7
Replace the main
board.
The CPU doesn’t
operate. (The driver
mechanism doesn’t
operate properly
at power on/off.)
CG-ROM or PROM is defective. Replace the main
board or PROM.