Sharp PG-M20X (serv.man10) Service Manual ▷ View online
33
PG-M20X
No
Abnormal picture
Yes
Rainbow-like picture
Is signal outputted at
pins (3), (5) and (7) of
SC9001?
pins (3), (5) and (7) of
SC9001?
Blackout
Is the lamp on?
Go to "Checking of PC I/F nunit"
Insert the connectors
completely.
completely.
No
Go to "Checking of Input PWB"
No
No
No
Trouble with peripheral circuit
of C9066 or trouble with IC9003
of C9066 or trouble with IC9003
Trouble with peripheral circuit
of C9068 or trouble with IC9003
of C9068 or trouble with IC9003
Trouble with peripheral circuit
of C9562 or trouble with IC9003
of C9562 or trouble with IC9003
Yes
End
Is any of SC9001, SC9002, P9002
and P9003 connectors
disconnected or in poor contact?
and P9003 connectors
disconnected or in poor contact?
No
Yes
Go to "Lamp Does Not
Light Up."
Light Up."
Others
No
Trouble with IC9003,
IC9006 or their periphery
IC9006 or their periphery
Yes
No
Is an appropriate voltage supplied
to SC9002?
to SC9002?
Yes
Reassemble the DMD, optical
mechanism and formatter unit.
Is the symptom improved?
mechanism and formatter unit.
Is the symptom improved?
No
Is the voltage at the positive-polarity
pin of C9066 appropriate (+7V)?
pin of C9066 appropriate (+7V)?
Yes
Is the voltage at the positive-polarity
pin of C9068 appropriate (+23 to +26V)?
pin of C9068 appropriate (+23 to +26V)?
Yes
Is the voltage at the negative-polarity
pin of C9562 appropriate (-26V)?
pin of C9562 appropriate (-26V)?
Yes
Trouble with the DMD
»
FORMATTER Unit
34
PG-M20X
No
Yes
Is the user menu displayed?
Check the onscreen display.
Check the RGB input.
Check the component input.
Check the video input.
Check the DVI digital input.
PC
カードのチェック
End
Check the PC card.
0
Checking of PC PWB
»
PC I/F Unit-1/12
35
PG-M20X
Checking of Onscreen Display
No
Is the user menu displayed
normally by the MENU key?
normally by the MENU key?
Enter the process menu and select
PATTERN. Then select the
COLOR pattern.
PATTERN. Then select the
COLOR pattern.
The onscreen display is normal.
Yes
Yes
Is the onscreen display color
normal?
normal?
Make STEP signal selection.
Adjust the DLP system in the
process adjustment mode.
process adjustment mode.
No
0
No
Is the STEP signal normal?
Rewrite the onscreen display data.
Yes
0
Yes
Is the signal compatible with the
STEP signal outputted at TL106
thru TL111?
STEP signal outputted at TL106
thru TL111?
Go to "Checking of GA4 and Its
Periphery".
Periphery".
Rewrite the onscreen display data.
IC8025 is defective.
No
»
PC I/F Unit-2/12
36
PG-M20X
Checking of RGB Input
Feed the sync separation type
analog RGB signal to INPUT 1.
analog RGB signal to INPUT 1.
Select INPUT 1 using the set's
key or the remote controller.
key or the remote controller.
Go to "Confirmation of
Video Input".
Video Input".
No
Go to "Checking of Sync Signal".
Yes
Go to "Checking of RGB Signal".
No
No
IC8013, 8025 or its periphery is
defective.
defective.
Yes
Yes
No
Yes
Does the picture appear?
Is the picture disturbed?
Do the three colors R, G and B
appear?
appear?
Yes
Carry out the AUTOSYNC process.
Is the contour of picture clear?
Is there any disturbance in the
vertical stripe pattern?
vertical stripe pattern?
No
End
1
2
3
»
PC I/F Unit-3/12
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