MODELS:
[CRT Circuit] |
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| Purpose: | To set the CRTs white level at Low Color Temperature. | ||
9. White Balance | Symptom: Monchrome has a color tint. | |||||
(Low Color Temperature) |
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Measuring |
| Note: This adjustment should be performed after the High temperature White | ||||
Instrument |
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Test Point |
| Balance Adjustment. | ||||
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| Low Color Temperature White Balance | ||
Ext. Trigger |
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| 1. Supply a Full White Raster signal to the Video Input. | |||||
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Measuring |
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| 2. Enter the Service Mode, VCJ Function. | |||||
Range |
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| 3. Adjust Item “17 RDRL” and “18 BDRL” for optimum white at the center of the | ||||
Input Signal | Full White Raster | |||||
picture. | ||||||
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Input Terminal | Video Input | Note: If the Cutoff level changes during the adjustment, use Items “14 CTRL” | ||||
| and “16 CTBL” to touch up the Cutoff level. Then readjust “RFRL” and | |||||
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| “BDRL”. | |
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| 4. Save data and exit the Service Mode. | ||
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| SERVICE MODE |
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| Activate …….. |
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| Function …...………..AUDIO |
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| Item No. ……….…….VIDEO |
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| Adjus t Data ….…….ADJUST |
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| Save Data …. ………ENTER |
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| Exit …………..MENU (twice) |
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[Video Circuit] | Purpose: | To set black level of the picture. |
10. Black Level | Symptom: | Excessive or insufficient contrast. |
Measuring | ||
Instrument | ||
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Test Point | ||
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Ext. Trigger | ||
Measuring | ||
Range | ||
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Input Signal | Monoscope | |
Input Terminal | Video Input |
Note: This adjustment should be performed after the Cutoff and White Balance Adjustments.
1.Supply a Monoscope signal to the Video Input.
2.Enter the Service Mode, VCJ Function.
3.Adjust Item “7 BRTH” so the 0% and 10% gradation levels on the Mono- scope pattern are the same. (Data should be within 31 ±4 range)
4.Save the data and exit the Service Mode.
SERVICE MODE Activate …….. MENU-0-1-5-7
Function …...………..AUDIO
Item No. ……….…….VIDEO
Adjust Data ….…….ADJUST
Save Data …. ………ENTER
Exit …………..MENU (twice)
40% | 30% | 20% | 10% |
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50% | 0% | 0% | 0% |
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60% | 70% | 80% | 90% |
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GRADATION SCALE
Page 32
