TTECorporation R&D Center (Shen’Zhen Lab)
Chassis Name
M28
SP
(G8)
Serial No.
Issued on
2006-06-02
Updated on
2007-3-21
Version
3.1
ċ
) Adjustment of Sub-contrast, Sub-tint and Sub-color for NSTC and PAL signal.
<Press KEY 4 in D-Mode>
1. connect the probe of Oscilloscope to the conjunction between R201 and P201 (B-out).
2. Apply the Grey-scale/Color-bar (NTSC signal) to the AV input, in STANDARD status.
3. Select CNTC to adjust the contrast, until that the amplitude “A” is 2.2V
P-P
(matching slim CRT, “A” is
2.0V
p-p
) as shown below.
4. Select COLC to adjust the color by tuning the amplitude of “a” and “d” to the same.
5. Select TNTC to adjust the tint by tuning the amplitude of “b” and “c” to the same.
6. Apply the Grey-scale/Color-bar (PAL signal) to the AV input, in STANDARD status.
7. Select COLP to adjust the sub-color by tuning the amplitude of “a”, “b”, “c” and “d” to the same.
IV) Adjustment of Focus, Screen Voltage and Sub-brightness
1.
Receive a crosshatch pattern.
2.
Adjust the “FOCUS” VR on the flyback the make the picture clear.
3.
Enter D-mode and press “MUTE” key and the screen will become a horizontal line. Then adjust the
“SCREEN” VR on the flyback transformer to set the intensity of the line to a minimum visible level (the
line can just be seen).
4.
Press “MUTE” key again and the TV will become full raster.
5.
Select BRTS(Press key 7 in D-Mode) to adjust the Sub-brightness, until that the 2
nd
dark bar of 8 level
grey scales just can be seen.
V) Adjustment of White balance
1.
Receive a black and white pattern at STANDARD status.
2.
Use a color analyzer to measure the black side of the screen. By changing the value of BB and GB, set
the reading of the color analyzer to x=274, y=280.(11500 K) (Press key 0 in D-Mode)
3.
Then measure the white side of the screen. By changing the value of BD and GD, set the reading of
the color analyzer to x=274, y=280. (11500 K) (Press key 0 in D-Mode)
A
a
b
c
d
8
