Service manual

Chapter 5 Troubleshooting
Rev. A
5-1
5.1 OVERVIEW
Since the printer mechanism and the power supply unit are remains the same with EPSON
Stylus Color 200/Stylus 200, this chapter describes only the checkpoints on the main control
circuit; C224 MAIN Board.
5.1.1 Unit Repair - C224 MAIN Board
The table below provides various symptom, likely causes and checkpoint, relating to the
C224 MAIN Board.
Symptom Condition Cause Checkpoint Solution
Printer does
not operate
at all.
CPU does
not operate.
Reset IC (IC9)
is defective
Check the signal waveform at pin 6 of
IC9:
Replace IC9
Oscillator
(CR2) or CPU
(IC2) is
defective
Is the signal waveform output from CR2
correct at pin 37/38?
Correct:
Replace IC2
Incorrect:
Replace CR2
ASIC does
not operate.
ASIC (IC1) is
defective
Is the signal waveform at pins 52 of IC1
correct?
Replace IC1