Haier TV-8888-03, Руководство по обслуживанию

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Adjustment
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.
Main power adjustment :
Adjustment: Connect voltage meter to +B on main PCB and make +B voltage be
115V±0.3V.
Screen voltage adjustment:
Adjustment: Tune TV on, receive a digital test pattern, set brightness and contrast
standard mode. Press “FACTORY” button on the service remote controller twice, “B/W
balance” display on the screen, then press “MUTE” button, and make a horizontal
bright line display on the screen.
Adjust Screen voltage of FBT and make the line just seen. Then press “MUTE” button
and exit service mode. Press “P.STD” button and make picture enter standard mode.
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, and B-DRV and
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.