Panasonic BT-M2090Y Service Manual page 37

Item
Contrast
(Video input,
NTSC)
Chroma
(Video input,
PAL)
Contrast
(Video input,
PAL)
Phase
(Video
input,NTSC
4.43)
Test equipment
Oscilloscope
Signal generator
(Color bar)
Oscilloscope
Signal generator
(Color bar)
Oscilloscope
Signal generator
(Color bar)
Oscilloscope
Signal generator
(Color bar NTSC
4.43)
Test points
TP·G
[CRT socket
PWB]
TP·B
[CRT socket
PWBJ
TP-G
[CRT socket
PWB]
TP·B
[CRT socket
PWB]
Adjustment
locations
S04 (CONTRAST)
[SERVICE MENU]
SOS (CHROMA)
[SERVICE MENU]
S06 (CONTRAST)
[SERVICE MENU]
S07 (PHASE)
[SERVICE MENU)
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~I-M2U9UY
Adjustment procedure
1. Supply an NTSC color bar input to Video
A.
2. Set the Color Off switch to off.
3. Connect oscilloscope to TP-G.
4. Adjust the waveform level to 24 Vp-p with S04.
5. Set the Color Off switch to Color.
_J-
t
24 Vp-p
t
1. Supply an NTSC color bar input to Video A.
2. Connect oscilloscope to TP-G.
3. Adjust S05 to obtain a straight line waveform.
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1. Supply an NTSC color bar input to Video A.
2. Set the Color Off switch to off.
3. Connect oscilloscope to TP-G.
4. Adjust the waveform level to 24 Vp-p with S06.
5. Set the Color Off switch to Color.
_J-
t
24 Vp-p
!
1. Supply an NTSC 4.43 color bar input to Video
A.
2.
Connect oscilloscope to TP-G.
3. Adjust S07 to obtain a straight line waveform.
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