Sharp XG-C40XU Anleitung Seite 34

XG-C40XU/XE
TROUBLE SHOOTING TABLE
Checking IC801 (RGB signal output circuit)
Go to "No colour or unusual tone",
"No Y signal" or "Out of sync".
Checking the chroma and Y signals of IC801
(RGB signal output)
Are there signal inputs at pins (12)
(Y signal) and (19)(chroma signal) of
P402?
Yes
Are there output waveforms at pins
(3)(chroma signal) and (6)
(Y signal)of IC816?
Yes
Are there signal inputs at pins (20)
(chroma signal) and (21) (Y signal)
of IC801?
Yes
Go to "Checking IC801
signal output circuit)".
No
Are there RGB output waveforms at
pins (31), (32) and (33) of IC801?
Are there output waveforms at the
emitters of Q1501, Q1502 and
Q1503?
Are there output waveforms at the
emitter of Q1505, Q1506 and Q1507?
Go to "Trouble shooting table for PC
I/F unit".
No
Go to "Checking the video unit
circuit".
No
Check the IC816 switching and their
peripheral circuits. If there is no signal
at pins (9) and (1) of IC816, check 3-D
noise reduction circuit (IC806).
No
Check IC801 and its peripheral
circuits.
(RGB
(Continued)
No
Yes
Check the data transfer and other
performance at pins (17) and (18) of
video IC801.
No
Yes
Check Q1501 thru Q1503, SC1501
and their peripheral circuits.
No
Yes
Check IC1501, Q1505 thru Q1507
and their peripheral circuits.
Check IC806 (3-D noise reduction
circuit) and its peripheral circuits.
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