Sharp VT-3448X, Руководство по обслуживанию

Страница: 18 / 144

n
PAL ADJUSTMENT
SUB-COLOUR ADJUSTMENT bus data adjustment)
Receive the PAL bar signal.
Put the set in the service mode.
Select the
mode
Connect the oscilloscope to (RED cathode).
(Use a : 1 probe.) for
l
Range:
l
Sweep time:
Adjust the data so that the white
and red portions of the PAL bar be at the
G
same level. See Fig.
Exit from the service mode.
l
When getting out of the SUB-COLOUR mode,
the
data turns up
,
To be at the same level
Fig.
ADJUSTMENT
SUB-TINT bus data adjustment)
Receive the bar signal.
Put the set in the service mode.
Select the SUB-TINT mode (TINT).
Connect the oscilloscope to
(B-Y OUT).
l
Range :
(AC)
l
Sweep time :
(Use a :
1
probe.)
Adjust the sub-tint data to obtain the waveform
as shown in Fig.
Exit from the service mode.
About 3
Fig. 9