Service manual

SERVICE MANUAL MASTER FILE
ENGLISH
Rev. A (1997/05/07)
3-12
Table 3-7. Repair of the C229PSB/PSE (continued)
Symptom
Condition Cause Checkpoint Solution
+35V line is
defective.
PC1 is
defective.
Verify the waveform at pin 5 or 7 of
PC1.
Figure 3-12. Waveform of PC1
Replace the
C229PSB/
PSE board.
The printer
dose not
operate at
all.
+5V line is
defective.
Regulator IC
(IC51) is
defective.
Verify the waveform at pin 5 of IC51.
Figure 3-13. OSC of IC51
Replace the
C229PSB/
PSE board.
Verify the waveform at pin 9 or 10 of
IC51.
Figure 3-14. Output of IC51
Replace the
C229PSB/
PSE board.