Panasonic BT-M2090Y Service Manual page 38

BT-M2090Y
Item
Chroma and
phase
(Y/C input,
NTSC)
Contrast
(Y/C Input,
NTSC)
Chroma
(Y/C input,
PAL)
Chroma
(Component
input, NTSC)
Test equipment
Oscilloscope
Signal generator
(Color bar)
Oscilloscope
Signal generator
(Color bar)
Oscilloscope
Signal generator
(Color bar)
Oscilloscope
Signal generator
(Color bar)
Test points
TP-B
(CRT socket
PWB]
TP-G
(CRT socket
PWB]
TP·B
(CRT socket
PWBJ
TP·B
(CRT socket
PWB]
Adjustment
locations
SOB (CHROMA)
S09(PHASE)
[SERVICE MENU]
S10 (CONTRAST)
[SERVICE MENU]
Adjustment procedure
1. Supply an NTSC color bar input to Y/C In.
2. Set the menu Filter Select to Notch.
3. Connect oscilloscope to TP-B.
4. Alternately adjust SOB and S09 to obtain a
straight line waveform.
5. Set Filter Select to Comb.
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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 S10.
5. Set the Color Off switch to Color.
_J-
t
24 Vp-p
t
S11 (CHROMA) 1. Supply a PAL color bar input to Video A.
(SERVICE MENU) 2. Connect oscilloscope to TP-B.
S12 (CHROMA)
(SERVICE MENU)
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3. Adjust s11 to obtain a straight line waveform.
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1. Set the menu RGB/Component to Component.
2. Supply an NTSC color bar input to Component
In.
3. Connect oscilloscope to TP-B.
4. Adjust S12 to obtain a straight line waveform.
5. Return the menu RGB/Component to original
setting.
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