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optimal
see figure
2 .At last press “CH+” or “CH-” and select “SPECTRAL” item, adjust high frequency separation. (see
figure 3) and make it optimal
see figure 4 .If effect isn’t good, you can repeat above steps till it is
optimal.
Adjustment: Connect voltage meter to +B on main PCB, make +B voltage be 115V
±
0.3V.
“
”
”
“
”
“
”
“
”
AGC ALIGNMENT:
Receive a color bar signal, 60dB,NTSC M color bar pattern, and check if there is noise in the picture, if there is
noise, press FACTORY button and enter service mode, adjust RF.AGC value and make the noise just disappear,
press FACTORY button and exit service mode.
White balance adjustment:
Turn TV on, receive white field signal, and make the probe of white balance adjustment instrument touch with
top and bottom of screen fully. Check if values of R, G, B are standard, if not, press “FACTORY” button, make
“B/W BALANCE” menu display on screen, adjust values of R-BIA, G-BIA, B-IA, R-DRV, G-DRV, B-DRV,
make them standard. Press FACTORY button, exit service mode.
OSD
I2C bus control (LA76810)
Varied range
S-BRI
Sub brightness
0-127
R-BIA
Red bias
0-255
G-BIA
Green bias
0-255
B-BIA
Blue bias
0-255
R-DRV
Red drive
0-127
G-DRV
Green drive
0-15
B-DRV
Blue drive
0-127
C.B/W
Cross B/W
0-3
FOCUS ALIGNMENT
Receive crosshatch (N system) pattern; Adjust focus-variable resistor on the FBT, make picture is the
sharpest.
Adjustment
Summary of Contents for HTX20S32
Page 12: ...11 6 Net dimension Net dimension ...
Page 13: ...12 7 Parts and Functions Parts and Functions HTF20R21 ...
Page 19: ...18 11 Circuit Diagram Circuit Diagram ...
Page 22: ...21 Circuit Block Diagram ...
Page 23: ...22 12 Circuit Explanation 0 Circuit Explanation ...
Page 24: ...23 2 N101 LA76814K 1 1 2 3 1 4 1 5 67 108 5 9 5 5 2 0 5 8 2 99 9 0 8 Circuit Explanation ...