Epson STYLUS 3000 Service Manual page 141

Table 5-8. Component Repair of the C211 MAIN Board (continued))
Condition
Symptom : The pump does not operate normally.
The pump motor does
not operate normally.
Symptom : The printer does not perform Self-test.
EEPROM must not be replaced alone.
Rev. A
Cause
Sub gate array IC6 Check the waveform for one of the
is defective. following signals output from the
IC18: PUA0/1 (Pin1/2)
IC18 is defective. Check the waveform for one of the
following signals from the IC18:
(Refer to the waveform (11).)
The pump motor is Check if the resistance of the motor
defective. coil is as follows;
Sub gate array IC6 Run the Self-test and check the
is defective. waveforms for the signals SBDATA
(Pin 24) and SCDATA (Pin 24)
output from the IC22:
CPU is defective.
Common driver IC Check the common signal
22 and IC23 are waveform output from one of the
defective. following pins:
(Refer to the waveform (12).)
Fuse is blown. Check the continuity of the fuse F1
on the MAIN board.
Printhead is
defective.
CAUTION
Checkpoint
PUB0/1 (Pin23/24).
Waveform (11)
A (Pin 6), /A (Pin 3)
B (Pin 18) /B (Pin 21)
7.7 ± 10 % at 25°C
(Refer to Table 5-1.)
Waveform (12)
CN21:Pin 18, 19, or 20
CN18:Pin 20, 21 or 22
EPSON Stylus COLOR 3000
Solution
Replace the MAIN
board.
Replace the MAIN
board or IC18.
Replace the MAIN
board.
Replace the MAIN
board.
Replace the MAIN
board or IC22 and
IC23.
Replace the MAIN
board or the fuse.
Replace the
printhead.
5-13