Component Repair Of The C203 Main Board - Epson STYLUS 3000 Service Manual

5.4 Component Repair of the C203 MAIN Board

This section provides information which enables you to repair and replace defective components on the
C203 MAIN board. Table 5-6 and 5-7 lists the causes for each symptom in order of possibility, with which
you are able to find and repair the defective part.
Condition
CPU doesn't operate.
(The driver mechanism
doesn't operate properly
at power on/off.)
Rev. A
Table 5-6. Component Repair of the C211 MAIN Board
Cause
Symptom : The printer does not operate at all.
Reset circuit is
defective.
Selection of ROM
and sub gate array
is improper.
CG-ROM or PROM is defective.
CPU is defective.
Checkpoint
Check the following signals for the
waveforms:
IC9:/

   
 
IC3:
 
   

Check the waveform for one of the
following signals output from the
CPU (IC5) for the change in the
signal High and Low :
/CS0 (Pin 1), /CS1 (Pin 2),
/CS2 (Pin128), /CS3 (Pin 127)
Check the waveform for one of the
following signals output from the
CPU (IC5):
XTAL (Pin 85), EXTAL (Pin 86)
EPSON Stylus COLOR 3000
Solution
Replace the MAIN
board or the reset IC.

Waveform (6)
Replace the MAIN
board.
Waveform (7)
Replace the MAIN
board or PROM.
Replace the MAIN
board or CRU1.
Waveform (8)
5-11