XOCECO LEC3205, Service Manual

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5
the value of the two levels gray-scale be the specified value.
3.4 white balance adjustment YPbPr channel
input YpbPr signal of K-7253 to YPbPr-1 terminal, input TIME380(480i) PATTERN471 8 level
gray-scale signal, set the value of Hor-width to 23, Ver-width to 5, S-bright to 120 and S-contrast to
140.Enter adjustment menu of white balance, adjust the third level using white balancer. Adjust
offset_R, offset_G and offset_B, to let color coordinate of the third level be 270 and 275 and its
brightness be about 15nit.
Input 8 level gray-scale signal of TIME392(480p), TIME394(720p) and TIME396(1080i) separately,
repeat the above operations to let color coordinate of the third level be 270 and 275 and its
brightness be about 15nit.
4 Performance check
4.1 TV function
Enter searching menu
→ auto search, connect RF-TV terminal with central signal source and check
if there are channels be skipped
4.2 AV/S, YpbPr terminals
Input AV/S, HD signal, check if it is normal.
4.3 VGA terminal
Insert VGA terminal, input VGA format signal of 640 X 480@60 Hz, check if the display is normal. If
interference exists, press the auto adjust button on remote control again and check if it is normal.
4.4 DVI terminal
Insert DVI terminal, input signal of 640 X 480@60 Hz signal and check if the display is normal.
4.5 check sound channel
Check the speaker and headphone of each channel.
4.6 presetting before ex-factory
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.
item setting item setting item setting
Picture mode NATURE OSD language English BALANCE 50
Sound mode NEWS VGA color
temperature
9300 SRS OFF
N/R WEAK SPEAKER ON CCD OFF
SCREEN 16:9 HEAD PHONE ON Turn off TV