Sharp PG-M20XU Service Manual page 36

PG-M20S
PG-M20X
» FORMATTER Unit
Rainbow-like picture
Go to "Lamp Does Not
Light Up."
Is signal outputted at
No
pins (3), (5) and (7) of
SC9001?
Yes
Trouble with IC9003,
IC9006 or their periphery
Is any of SC9001, SC9002, P9002
and P9003 connectors
disconnected or in poor contact?
No
Is an appropriate voltage supplied
to SC9002?
Yes
Reassemble the DMD, optical
mechanism and formatter unit.
Is the symptom improved?
No
Is the voltage at the positive-polarity
pin of C9066 appropriate (+7V)?
Yes
Is the voltage at the positive-polarity
pin of C9068 appropriate (+23 to +26V)?
Yes
Is the voltage at the negative-polarity
pin of C9562 appropriate (-26V)?
Yes
Trouble with the DMD
Abnormal picture
Blackout
No
Is the lamp on?
Go to "Checking of PC I/F nunit"
Yes
Insert the connectors
completely.
No
Check the regulator ICs on the
input PWB and KEY PWB.
Yes
End
No
Trouble with peripheral circuit
of C9066 or trouble with IC9003.
No
Trouble with peripheral circuit
of C9068 or trouble with IC9003.
No
Trouble with peripheral circuit
of C9562 or trouble with IC9003.
36
No
Yes
Others