XOCECO LC-32FC18, Service Manual

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5
4.4.2 Adjustment of white balance
Input HDMI signal and check the white balance at HDMI channel.
a) Enter “color temperature setting” menu, select “color temperature” of “NORMAL”.
b) Input 16-level gray signal of the mode 1024*768 @60HZ (TIMING:856, PATTERN:921).
c) Fix BLUE GAIN at 1000, adjust RED GAIN, BLUE GAIN to set the
color coordinates of
fourteenth level to (X=285, Y=293).
d) Set the color coordinates of warm color temperature (WARM) to (X=300, Y=306) using the
same method.
e) Set the color coordinates of cool color temperature (COOL) to (X=270, Y=283) using the same
method.
f) Check if the color coordinates of the cool/warm color temperature at YPBPR (include
480P,720P), VIDEO(NTSC) and TV channels are within the scope of the correspond value
(permit ±8 error).
5 Functional Inspection
5.1 TV function
Connect RF-AIR terminal to the central signal source, Enter the channels menu
→ scan channels,
select input type “Antenna” to auto search and check if there is station skipping. Check if search
(
→ Find channel), the output of earphone and speakers, and the picture are normal.
5.2 AV/S-Video terminal
Connect AV/S-Video signal, check if they are normal.
5.3 YPBPR terminal
Input YUV signal (VG-848 signal generator), separate input the YUV format signal of table 1 and
check if the display and sound are normal.
Table1 YUV signal format
NO
H-frequency (KHz) V-frequency (Hz) Signal
1 15.734 59.94 SDIV 480i
2 31.469 59.94 HDIV 480p
3 45 59.94 HDIV 720p
4 45 60 HDIV 720p
5 33.75 59.94 HDIV 1080i
6 33.75 60 HDIV 1080i
5.4 VGA terminal
Input VGA signal (VG-848 signal generator), separate input the VGA format signal of table1 and
table 2, check if the image and sound is normal. If the image is deflection of H-field, select Auto
Sync correction of the Screen Settings menu. If the image is slight disturb, adjust Phase correction
of the Screen Settings menu.