EPSON Stylus COLOR 3000

Table 5-8. Component Repair of the C211 MAIN Board (continued))

Condition

Cause

Checkpoint

Solution

 

 

 

 

Symptom : The pump does not operate normally.

Sub gate array IC6

Check the waveform for one of the

Replace the MAIN

is defective.

following signals output from the

board.

 

IC18: PUA0/1 (Pin1/2)

 

 

PUB0/1 (Pin23/24).

 

Pin 18 on the IC18

The pump motor does not operate normally.

Pin 24 on the IC18

 

Waveform (11)

 

IC18 is defective.

Check the waveform for one of the

Replace the MAIN

 

following signals from the IC18:

board or IC18.

 

A (Pin 6), /A (Pin 3)

 

 

B (Pin 18) /B (Pin 21)

 

 

(Refer to the waveform (11).)

 

The pump motor is

Check if the resistance of the motor

 

defective.

coil is as follows;

 

 

7.7 Ω ± 10 % at 25°C

 

 

(Refer to Table 5-1.)

 

Symptom : The printer does not perform Self-test.

Sub gate array IC6

Run the Self-test and check the

Replace the MAIN

is defective.

waveforms for the signals SBDATA

board.

 

(Pin 24) and SCDATA (Pin 24)

 

 

output from the IC22:

 

Pin 24 on the IC22

⎯

Pin 18 on the CN21

 

Waveform (12)

 

CPU is defective.

⎯

Replace the MAIN

 

 

board.

Common driver IC

Check the common signal

Replace the MAIN

22 and IC23 are

waveform output from one of the

board or IC22 and

defective.

following pins:

IC23.

 

CN21:Pin 18, 19, or 20

 

 

CN18:Pin 20, 21 or 22

 

 

(Refer to the waveform (12).)

 

Fuse is blown.

Check the continuity of the fuse F1

Replace the MAIN

 

on the MAIN board.

board or the fuse.

Printhead is

⎯

Replace the

defective.

printhead.

 

CAUTION

EEPROM must not be replaced alone.

Rev. A

5-13