Table 3-10. Repair of the C229MAIN (continued)
Symptom Condition Cause Checkpoint Solution
The printer
dose not
operate at
all.
The CPU
dose not
operate.
The CPU is
defective.
Check for the proper oscillator signal
at pin 26 or 27 of the CPU (IC3).
Figure 3-17. Clock Signal of CPU
Replace the
C229MAIN
board.
The carriage
operates
abnormally.
The carriage
dose not
operate at
all.
IC8 is
defective.
Check for the proper CR motor
phase control signals at pin 5, 6, 16
and 17, and motor driving signals at
pin 1, 8, 11 and 18 of IC8.
Pin 5 of IC8
Pin 1, of IC8
Figure 3-18.
CR Motor Control Signal
Replace the
C229MAIN
board.
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