Sanyo 1 682 350 16, Service Manual

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4.2.3 White balance adjustment of YPbPr channel
ADC calibration of SD mode: Input color-bar signal with format of 480i/60 Hz (VG848: Timing is
968
，
PAT is 918), enter into submenu “ADC adjustment” of factory menu and select item “AUTO
COLOR”, system will begin calibration automatically, please note whether picture and data are
abnormal clearly or not (main abnormal data phenomena are that several data are very different from
the other or about 1000 more than the other); it is failed to calibrate ADC if data are abnormal clearly,
so it is necessary to do the calibration again;
ADC calibration of HD mode: Input color-bar signal with format of 1080i/60 Hz (VG848: Timing is
972
，
PAT is 918), enter into submenu “ADC adjustment” of factory menu and select item “AUTO
COLOR”, system will begin calibration automatically, please note whether picture and data are
abnormal clearly or not (main abnormal data phenomena are that several data are very different from
the other or about 1000 more than the other); it is failed to calibrate ADC if data are abnormal clearly,
so it is necessary to do the calibration again;
White balance adjustment: Input 16-grey-scale signal with format of 1080i/60 Hz (VG848: Timing
is 972
，
PAT is 921), check if white balance is normal, if not, enter into submenu “color temperature
adjustment” of factory menu, set item “ALL COLOR” as “OFF”, please refer to step 4.2.2 to adjust
white balance for model of which dimension is 26” , bigger than 26” or smaller than 26” respectively;
Note: Item “ALL COLOR” must not be altered as “ON” again once set as “OFF”.
4.2.4 White balance adjustment of VGA channel
Auto-calibration: Input square signal with format of 800×600/60 Hz (VG848: Timing is 854
，
PAT is
CROSS) to do calibration automatically in order to make window filled with picture;
ADC calibration: Input monochrome signal with format of 800×600/60 Hz (VG848: Timing is 854
，
PAT is 948), enter into submenu “ADC adjustment” of factory menu and select item “AUTO COLOR”,
system will begin calibration automatically, please note whether picture and data are abnormal clearly
or not (main abnormal data phenomena are that several data are very different from the other or
about 1000 more than the other); it is failed to calibrate ADC if data are abnormal clearly, so it is
necessary to do the calibration again;
White balance adjustment: Input 16-grey-scale signal with format of 800×600/60 Hz (VG848:
Timing is 854
，
PAT is 921), check if white balance is normal, if not, enter into submenu “color
temperature adjustment” of factory menu, set item “ALL COLOR” as “OFF”, please refer to step 4.2.2
to adjust white balance for model of which dimension is 26” , bigger than 26” or smaller than 26”
respectively;
Note: Item “ALL COLOR” must not be altered as “ON” again once set as “OFF”.
4.2.5 White balance adjustment of AV channel
Input 16-grey-scale signal with format of PAL (VG848: Timing is 969
，
PAT is 921), check if white
balance is normal, if not, enter into submenu “color temperature adjustment” of factory menu, set item
“ALL COLOR” as “OFF”, please refer to step 4.2.2 to adjust white balance for model of which
dimension is 26” , bigger than 26” or smaller than 26” respectively;
Note: Item “ALL COLOR” must not be altered as “ON” again once set as “OFF”.
4.2.6 Auto-white balance adjustment
4.2.6.1 ADC pre-calibration
Enter into factory menu, set “Program source” as “YPbPr”, input color-bar signal with format of
480i/60 Hz (VG848: Timing is 968
，
PAT is 918), enter into submenu “ADC adjustment” of factory
menu and select item “AUTO COLOR”, system will begin calibration automatically; input color-bar
signal with format of 1080i/60 Hz (VG848: Timing is 972
，
PAT is 918), enter into submenu “ADC