Haier 28T9G, Руководство по обслуживанию

Страница: 17 / 32

Service adjustment
BUS CONTROL ADJUSTMENT
To enter BUS control mode, Press “TEST” key on the Remote control unit of factory.
Press “0” to “9“ key, (Mkey) and corresponding on-screen display will be appeared.
On TV screen “TEST” will be indicated, this means entered bus control mode.
And press following key, each function will be available.
Remote Hand Unit keys
[M1] [M2] [M3]
[M0]
MENU8
V SLOPE
31
V SHIFT
31
[M8] menu
MENU0 Geometrical adjustment
Receive PAL standard Complete pattern signal.
Adjustment steps
：
a) Adjust V. SLOPE, to the center horizontal line just appeare from half bottom shadow.
b) Adjust V. SIZE, to get 90% of vertical picture contents would be displayed on CRT.
c) Adjust V. SHIFT, the center horizontal line correspond to CRT vertical center.
d) Adjust H.SHIFT, to get the picture horizontal center correspond to CRT horizontal center.
Receive NTSC signal and repeat above [M0] and [M1] adjustment.
[M7] Menu
AGC Adjustment.
Receive 60dB
μ
(1mV)V
H
colour bar pattern signal
，
adjust AGC value
（
voltage from high to low
），
to noise reduce gradually and just disappeared point.
[M9] Menu
CRTcut off and white balance adjustment.
Receive white signal.
a) CRT cut off adjustment.
1. Select “SC”, then automatically vertical scan will be stopped.
2. Adjust SCREEN control on Flyback transformer to get the darkest single horizontal
line (red, green, or blue, sometimes shows more yellow, more purple or more white).
b) White balance adjustment.
1. Select RD/BD menu.
2. Adjust RD/BD to get colour temperature as x=281, y=311
c) Sub-Brightness adjustment. (Use stair case signal)
1. Select SB menu.
2. Adjust SB to get the darkest step being cutoff.
1
7