f) Fix item “G-OFFSET”, adjust items “R-OFFSET, B-OFFSET” to set chromatic coordinates of 4
th
scale as the value of temperature “Normal”;
g) During temperature “Normal” adjustment , make sure that chromatic coordinates errors of bright
scale are (x±10, y±15) and chromatic coordinates errors of dark scale are (x±10,y±25);
h) Move cursor to item “COPY ALL” again to copy data of white balance to other channels;
i) Check if chromatic coordinates of “Cool” and “Warm” meet the requirements or not, if not, adjust
items “R-GAIN/B-GAIN/R-OFFSET/B-OFFSET” to meet them:
“Cool”: chromatic coordinates errors of bright scale are (x±5, y±15), chromatic coordinates
errors of dark scale are (x±8, y±30);
“Warm”: chromatic coordinates errors of bright & dark scales are both (x±10, y±10);
j) Check if chromatic coordinates of other channels meet the requirements, if not, adjust them
respectively;
k) Check white balance of each channel by eye, check if the picture is normal;
l) Please refer to the adjusting rules as follows:
B Gun: coordinates of X and Y will increase when B gun is adjusted downwards;
coordinates of X and Y will decrease when B gun is adjusted upwards;
R Gun: adjusting R gun will effect coordinate of X, and value of Lv slightly;
coordinate of X will increase when R gun is adjusted upwards;
coordinate of X will decrease when R gun is adjusted downwards;
G Gun: adjusting G gun will effect coordinate of Y, and value of Lv greatly;
coordinate of Y will increase when G gun is adjusted upwards;
coordinate of Y will decrease when G gun is adjusted downwards.
5 Functions checkup
5.1 Analog & digital TV functions
Input central signal to RF port, enter into menu “CHANNEL”, then search channels automatically,
check if there is any omitted channel, check if the output of speakers and the picture are normal.
5.2 Composite video of AV port
Input composite video signal to AV port, check if the picture and the sound are normal under the
circumstances of power on/off, switching channel and format, etc.
5.3 Analog component YPbPr/YCbCr port
Input analog YP
B
P
R
signal from VG848 signal generator with YP
B
P
R
formats listed as Table 4
respectively, check if the picture and the sound are normal under the circumstances of power-on/off,
switching channel and format, etc.
Table 4 YP
B
P
R
signal formats
No.
Definition
H. - fre.（kHz） V. – fre.（Hz）
Dot pulse fre.
（MHz）
Note
1 720×480 15.734/15.75 59.94/60 13.5/13.514
480i
(NTSC, NTSC4.43,PAL60,PAL-M)
2 720×576 15.625 50 13.5 576i (PAL, PAL-N, SECAM)
3 720×480 31.469/31.5 59.94/60 27/27.027 480p
4 720×576 31.25 50 27 576p
5 1280×720 37.5 50 74.25 720p (50p)
6 1280×720 44.955/45 59.94/60 74.176/74.25 720p (59.94p/60p)
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