Panasonic BT-M1950Y Service Manual page 39

Item
Contrast
(Component
input, NTSC)
Contrast
(RGB input,
NTSC)
Color
temperature
(9300
K)
Test equipment
Oscilloscope
Signal generator
(Color bar)
Oscilloscope
Signal generator
(Color bar)
Signal generator
(Resolution pattern,
color bar)
Color analyzer or
color temperature
meter
Test points
TP·G
[CRT socket
PWB]
TP·G
[CRT socket
PWB)
Adjustment
locations
S13 (CONTRAST)
[SERVICE MENU)
S14 (CONTRAST)
[SERVICE MENU)
W01 (R CUTOFF)
W02 (G CUTOFF)
W03 (B CUTOFF)
W04(R DRIVE)
W0S(G DRIVE)
W06(B DRIVE)
[SERVICE MENU)
-39-
t:U·Ml~OUY
Adjustment procedure
1. Set the Brightness control to minimum.
2. Set the menu RGB/Component to Component.
3. Supply an NTSC color bar input to Component
In.
4. Set the Color Off switch to off.
5.
Connect oscilloscope to TP-G.
6.
Adjust the waveform level to
41
Vp-p with S 13.
7. Set the Color
Off
switch to Color.
8. Return the menu RGB/Component to original
setting.
J
1. Supply an NTSC color bar input to RGB In.
2. Connect oscilloscope to TP-G.
3. Adjust the waveform level to 41 Vp-p with S14.
I I
fL-t---:--
1 I
t
41Vp.p
I I I
t
' '
1. Supply a resolution pattern input.
2. Check that the menu Color Temp. is 9300.
3.
Set the Color Off switch to off.
4. Set W01 to 18, W03 to 21, W05 to 32, and
W02 to 25.
5. Adjust W04 and W06 for the specified color
temperature (reference: W04
=
25, W06
=
25)
(X
= 0.283,
Y
=
0.297)
6.
Supply a color bar input (black and white).
7. Check for proper white balance tracking. If
deviated in the
dark
components, adjust with
W01 and W03.
• Adjustment with color temperature meter:
Apply the sensor to the CRT, adjust and
measure. If deviated, repeatedly adjust and
measure to obtain the specified color
temperature.