XOCECO LC15YS031, Service Manual

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5
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
2 800 x 600 @ 60 40.000 37.879 60.317
3 1024 x 768 @ 60 65.000 48.363 60.004
4 1024 x 768 @ 70 75 56.48 70.07
5 1280 x 1024 @ 60 109.47 63.72 60
e). YPbPr Interface
Input YPbPr signal to YPbPr/YcbCr interface. Separately input the several types of YPbPr format
signals: 480P/60Hz, 480P/59Hz; 720P/60Hz, 720P/59Hz; 1080i/60Hz, 1080i/59Hz; 1080p/60Hz,
1080p/59Hz and check if the picture and sound is normal.
5. Preset ex-works
In the status of TV enter the factory menu by pressing the factory key and then perform presetting.
6. 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 (signal):
Picture is out of focus or jumping Bad status in signal receiving
Poor signal
Check if there are failures with the electrical connector or
the antenna.
Check if the antenna is properly connected.
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.
Maybe the shielded-layer of signal wire is not connected
properly to the connector.
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.
2.TV set:
Symptoms Possible cause