Service manual

SERVICE MANUAL MASTER FILE
ENGLISH
Rev. A (1997/05/07)
3-15
Table 3-10. Repair of the C229MAIN (continued)
Symptom
Condition Cause Checkpoint Solution
The paper
feeds
abnormally.
The paper
dose not
feed at all.
IC 11 is
defective.
Verify the PF motor phase control
signals at pin 1, 2, 23, 24, and
motor drive signals at pin 3, 6, 18,
21 of IC11.
Pin 1 of IC11
Pin 3 of IC 8
Figure 3-19.
PF Motor Control Signal
Replace the
C229MAIN
board.
Self test
printing is
abnormal.
The self test
printing is
not executed
or a
particular dot
is not
printed.
Any
transistor of
Q2 - Q10 is
defective.
Verify the printhead drive signal at
the corrector and base of Q2 - Q11
BASE of Q5
CORRECTOR of Q5
Figure 3-20.
Pritnhead Drive Signal
Replace the
C229MAIN
board.
Any
transistor
from Q11 to
Q25 is
defective.
-
Replace the
C229MAIN
board.
Data from
the host
computer is
printed
incorrectly.
Data
corruption
occurs when
the interface
is used.
IC2 or CPU
is defective. -
Replace
C229MAIN
board.