Read Sharp PG-M25XE (serv.man11) Service Manual online
35
PG-M25X
Feed the composite video signal to
INPUT 3. Select INPUT 3 using the
set's key or the remote controller.
INPUT 3. Select INPUT 3 using the
set's key or the remote controller.
Feed the S-video signal to INPUT 2.
Select INPUT 2 using the set's key
or the remote controller. Does the
picture appear?
Select INPUT 2 using the set's key
or the remote controller. Does the
picture appear?
Does the picture appear?
Check IC3502 and its peripheral
circuit.
circuit.
Is the picture disturbed?
Is the video signal including sync
signal inputted to pin (3) of SC3001
on the input PWB?
signal inputted to pin (3) of SC3001
on the input PWB?
Yes
Yes
No
No
No
No
Check IC8016 (video decoder)
of PC board and its periphery.
Check Q8002.
of PC board and its periphery.
Check Q8002.
Yes
Is the video signal including sync
signal inputted to pin (7) of SC3502
on the input PWB?
signal inputted to pin (7) of SC3502
on the input PWB?
No
Check Q3512 and Q3513 on
the input PWB.
the input PWB.
Yes
Is the color normal?
End
Yes
No
Yes
Yes
No
Checking of Video Input
Check IC8363 and
IC8025 (CVIC2) and
their periphery.
IC8025 (CVIC2) and
their periphery.
Check Q3502 on the
input PWB.
input PWB.
Is the C signal inputted
to pin (11) of SC3001?
to pin (11) of SC3001?
1
1
Yes
No
Are pin(5) (horizontal) and
pin(10) (vertical) signals
inputted to IC8363 on the
PC I/F unit?
pin(10) (vertical) signals
inputted to IC8363 on the
PC I/F unit?
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