Sanyo LED-22XR10F Service Manual page 9

（272、278）;
f) Adjust items "R-OFFSET, G-OFFSET, B-OFFSET" to set chromatic coordinates of 4
scale as（272、278）;
g) During adjustment , make sure that chromatic coordinates errors of bright scale and dark scale
are both (X=272±10 Y=278±10);
h) Move cursor to item "COPY ALL" again to copy data of white balance to other channels except
DTV channel;
i) Check if chromatic coordinates of "HDMI NORMAL" and "WARM" meet the requirements or not,
if not, adjust items "R-GAIN/B-GAIN/R-OFFSET/B-OFFSET" to meet them:
chromatic coordinates errors of bright & dark scales are both (x±10, y±10),
j) Check if "COOL, NORMAL, WARM" chromatic coordinates of other channels meet the
requirements, if not, adjust them respectively with the same method as HDMI channel's and by
using 16 grey step signal all, exit menu "W/B ADJUST" after completing adjustment, the data will
be saved automatically;
k) DTV channel adjustment: switch to DTV channel, select 16 grey step program, enter into factory
menu, adjust white balance followed by steps e), f), g);
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.
4.4 Auto white balance adjustment
4.4.1 Block diagram as Fig. 3:
USB to RS232
Special USB to Mini
CA210
Optical
probe
Fig.2 System block diagram
PC
VG848
RS232
Test signal
th