Service manual

SERVICE MANUAL MASTER FILE
ENGLISH
Rev. A (1997/05/07)
3-14
Table 3-9. 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.
Verify the 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.
Verify the CR motor phase control
signals at pin 5, 6, 16,17, and motor
drive signals at pin 1, 8, 11, 18 of
IC8.
Pin 5 of IC8
Pin 1, of IC8
Figure 3-18.
CR Motor Control Signal
Replace the
C229MAIN
board.