Service manual

Page 42
Purpose:
Measuring
Instrument
Test Point
Measuring
Range
Input Signal
Ext. Trigger
Input Terminal
Symptom:
Purpose
Measuring
Instrument
Test Point
Measuring
Range
Input Signal
Ext. Trigger
Input Terminal
Symptom:
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
To set the CRTs white level in the HD mode.
Monchrome pictures have a color tint.
[CRT Circuit]
9. White Balance (HD)
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HD White Raster
DTV Inputs
1. Supply an HD Full White Raster signal to the DTV Inputs.
2. Select the DTV Inputs (Input button)
3. Activate the Adjustment mode, VC Function.
4. Set Item “23 COL” to 0.
5. Adjust Items “6 RDRH” and “8 BDRH” for optimum white at the center of the
screen.
6. Reduce the input signal luminance to 25%.
7. Adjust Items “9 CTRH” and “11 CTBH” for optimum white.
8. Set the data for Item “23 COL” back to 31.
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White Raster (HD&NTSC)
Video & DTV Inputs
[CRT Circuit]
10. Cb, Cr Offset
To set Cb and Cr color signal level.
Incorrect colors.
1. Supply an NTSC White Raster (25% luminance) signal to a Video Input.
2. Activate the Adjust Mode, VC Function
3. Set Item “23 COL” data to 63.
4. Adjust Items “60 CRO1” and “61 CBO1” for optimum white.
5. Set Item “23 COL” data to 31.
6. Save data and Exit the Service Mode.
CIRCUIT ADJUST MODE
Activate …….. MENU-2-1-5-7
Function …...………..AUDIO
Item No. ……….…….VIDEO
Adjust Data ….…….ADJUST
Save Data …. ………ENTER
Exit …………..MENU (twice)
CIRCUIT ADJUST MODE
Activate …….. MENU-2-1-5-7
Function …...………..AUDIO
Item No. ……….…….VIDEO
Adjust Data ….…….ADJUST
Save Data …. ………ENTER
Exit …………..MENU (twice)