Read Sharp XG-NV5XE (serv.man40) Service Manual online
31
XG-NV5XE
XG-NV5XM
XG-NV5XM
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.
performance at pins (17) and (18) of
video IC801.
No
Go to "No colour or unusual tone",
"No Y signal" or "Out of sync".
"No Y signal" or "Out of sync".
Yes
No
Are there output waveforms at the
emitters of Q1501, Q1502 and
Q1503?
emitters of Q1501, Q1502 and
Q1503?
Check IC1501 (amplifier), IC1502
(RGB offset) and their peripheral
circuits.
(RGB offset) and their peripheral
circuits.
No
Are A/D outputs of IC1504, IC1505
and IC1506 as specified?
and IC1506 as specified?
Check the VCLK, IC1504, IC1505,
IC1506 and their peripheral circuits.
IC1506 and their peripheral circuits.
Yes
Are there RGB output waveforms at
pins (31), (32) and (33) of IC801?
pins (31), (32) and (33) of IC801?
Checking the chroma and Y signals of IC801
(RGB signal output)
(RGB signal output)
Yes
No
Go to "Checking the video unit
circuit".
circuit".
Yes
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).
peripheral circuits. If there is no signal
at pins (9) and (1) of IC816, check 3-D
noise reduction circuit (IC806).
No
Are there signal inputs at pins (20)
(chroma signal) and (21) (Y signal)
of IC801?
(chroma signal) and (21) (Y signal)
of IC801?
Check IC801 and its peripheral
circuits.
circuits.
Check IC806 (3-D noise reduction
circuit) and its peripheral circuits.
circuit) and its peripheral circuits.
Go to "Checking IC801 (RGB signal
output circuit)".
output circuit)".
Yes
Are there signal inputs at pins (12)
(Y signal) and (19)(chroma signal) of
P402?
(Y signal) and (19)(chroma signal) of
P402?
Are there output waveforms at pins
(3)(chroma signal) and (6)
(Y signal)of IC816?
(3)(chroma signal) and (6)
(Y signal)of IC816?
Go to "Trouble shooting table for PC
I/F unit".
I/F unit".
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