5
the output picture from AV OUT is colorless.)
d) VGA Interface
Input VGA signal(K7253 signal generator). Separately input the four types of VGA format signals as
listed in Table 1. Wait till auto calibration is over. Then check if the picture and sound is normal. If
there has been interference to the picture then press the auto set key on the remote control once
again and check if the display is normal.
Table 1 Display Format of PC
Item
Resolution
Picture
element clock
(MHz)
H-SYNC
(kHz)
V-SYNC
(Hz)
Remark
1
640 x 480 @ 60
25.175
31.469
59.900
2
720 x 400 @ 70
28.322
31.469
70.086
3
800 x 600 @ 60
40.000
37.879
60.317
5
1024 x 768 @ 60
65.000
48.363
60.004
e) YprPb Interface
Connect to access Y
P
rPb signal(K7253 signal generator). Separately input the five types of YprPb
format signals -- 480P/50 Hz,480P/60 Hz,720P/60 Hz,1080I/50 Hz,1080I/60 Hz and check if the
picture and sound is normal after auto calibration is over.
Connect to access YprPb signal(DVD signal generator). Input the signals -- 480I/50 Hz,480I/60 Hz
separately and check if the picture and sound is normal.
8 Preset ex-works
In the status of TV enter the factory menu by pushing the factory key and then perform presetting.
9 Ex-works packing
Check accessories and then pack them in box.
Trouble shooting
Before servicing please check to find the possible causes of the troubles according to the table below.
1.Antenna:
Picture is out of focus or jumping
Bad status in signal receiving
Maybe broadcast signal itself is not good
Check if the outdoor antenna is disconnected.
Check if the antenna is correctly oriented.
Fringe in picture
Check if the antenna is correctly oriented.
Maybe there is electric wave reflected from hilltop or building.
Picture is interfered by stripe
shaped bright spots
Possibly due to interference from automobile, train, high
voltage transmission line, neon lamp etc.
Maybe there is interference between antenna and power
supply line. Please try to separate them in a longer distance.
There appear streaks or light color
on the screen
Check if interfered by other equipment and if interfered
possibly by the equipment like transmitting antenna, non
professional radio station and cellular phone.