Sharp XG-NV2SB, Руководство по обслуживанию

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33
XG-NV2SB
TROUBLE SHOOTING TABLE
(Continued)
Checking IC801 (RGB signal output circuit)
Yes
No
Check the data transfer and other
performance at pins (17) and (18) of
video IC801.
No
Go to "No color or unusual tone", "No
Y signal" or "Out of sync".
Yes
No
Are there R.G.B. waveforms of
IC1501?
Check IC1501 (amplifier), IC1502
(RGB offset) and their peripheral
circuits.
No
Are A/D outputs of IC1504, IC1505
and IC1506 as specified?
Check the VCLK, IC1504, IC1505,
IC1506 and their peripheral circuits.
Yes
Are there RGB output waveforms at
pins (31), (32) and (33) of IC801?
Checking the chroma and Y signals of IC801
(RGB signal output)
Yes
No
Go to "Checking the video unit
circuit".
Yes
No
Check the IC816 switching and their
peripheral circuits. If there is no signal
at pins (8) and (16), check 3-D noise
reduction circuit (IC806).
Check IC806 (3-D noise reduction
circuit) and its peripheral circuits.
Go to "Checking IC801 (RGB
signal output circuit)".
Are there signal inputs at pins (12)
(Y signal) and (19)(chroma signal) of
P402?
Are there output waveforms at pins
(3)(chroma signal) and (6)
(Y signal)of IC816?
Go to "Trouble shooting table for PC
I/F unit".