Mitsubishi Electric 65313, Service Manual

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Page 32
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-48313 / WS-48413 / WS-55313 / WS-55413 / WS-65313 / WS-65413
DC Voltmeter
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NTSC White Raster
RF or Video
[CRT Circuit]
5. White Balance (NTSC)
To set the CRTs white level in the NTSC mode.
Monochrome has a color tint.
Note : Use the “FORMAT” button to activate the Expand mode (full screen).
1. Supply a full White Raster Signal
2. Activate the Service Mode, Video Chroma Function.
3. Set the data for Item “19 COL” to 0.
4. Adjust Items “4 RDRH” and “6 BDRH” for optimum white at the center of
the screen.
5. Reduce the input luminance level to 25%.
6. Adjust Items “7 CTRH” and “9 CTBH” for optimum white.
7. Insert a Milliammeter in series with each CRT Cathode. The maximum
allowable current for each CRT is given in the table below.
8. Set the white raster to 100% and adjust Items “10 RDRL” and “12 BDRL” for
optimum white at the center of the screen.
9. Reduce the luminance level to 25%.
10. Adjust Item “13 CTRL” and “15 CTBL” for optimum white.
11. Set the data for Item “19 COL” back to 31.
12. Press “ENTER” to save data.
To set the CRTs white level in the HD mode.
Monchrome pictures have a color tint. [CRT Circuit]
6. 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, Video Chroma Function.
4. Set Item “19 COL” to 0.
5. Adjust Items “4 RDRH” and “6 BDRH” for optimum white at the center of the
screen.
6. Reduce the input signal luminance to 25%.
7. Adjust Items “7 CTRH” and “9 CTBH” for optimum white.
8. Set the white raster to 100% and adjust Items “10 RDRL” and “12 BDRL” for
optimum white at the center of the screen.
9. Reduce the luminance level to 25%.
10. Adjust Item “13 CTRL” and “15 CTBL” for optimum white.
11. Set the data for Item “19 COL” back to 31.
12. Press “ENTER” to save data.
CIRCUIT ADJUST MODE
Activate …….. MENU-0-3-5-7
Function …...………..AUDIO
Item No. ……….…….VIDEO
Adjust Data ….…….ADJUST
Save Data …. ………ENTER
Exit …………..MENU (twice)
CIRCUIT ADJUST MODE
Activate …….. MENU-0-3-5-7
Function …...………..AUDIO
Item No. ……….…….VIDEO
Adjust Data ….…….ADJUST
Save Data …. ………ENTER
Exit …………..MENU (twice)
Max CRT Current
CRT ALL
Red 580 ua
Green 580 ua
Blue 580 ua