Sharp XV-DW100U Service Manual page 36

XV-DW100U
TROUBLE SHOOTING TABLE
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 (7), (9)
and (25) of SC401?
Yes
Are there output waveforms at pins
(7) of IC6010 (chroma signal) and
(5), (Y signal)of IC6009?
Yes
Are there signal inputs at pins (20)
(chroma signal) and (21) (Y signal)
of IC801?
Yes
Go to "Checking IC801 (RGB signal
output circuit)".
Checking IC801 (RGB signal output circuit)
No
Are there RGB output waveforms at
pins (31), (32) and (33) of IC801?
Are there output waveforms at pin
(1) of IC6803, IC6804, IC6805?
Are A/D outputs of IC6805, IC6806
and IC6806 as specified?
Go to "Trouble shooting table for PC
I/F unit".
No
Go to "Checking the video unit
circuit".
No
Check the IC6009 and IC6010
switching and their peripheral circuits. If
there is no signal at pins (1) of IC6010
and pin (16) of IC6009 check 3-D noise
reduction circuit (IC8001).
No
Check IC801 and its peripheral
circuits.
(Continued)
No
Yes
Check the data transfer and other
performance at pins (17) and (18) of
video IC801.
No
Yes
Check IC6802, IC6803, IC6804,
IC6805 and their peripheral circuits.
No
Yes
Check the CLK IC6805, IC6806,
IC6807 and their peripheral circuits.
36
Check IC806 (3-D noise reduction
circuit) and its peripheral circuits.