Aiwa TV-SA2055 Service Manual page 18

3-5. V SIZE Vertical Size Adjustment
PAL
Adjustment Menu No. 29 (Page 3-5)
Input signal : Crosshatch
Measuring instrument : Pattern generator / PAL
• Use the volume keys on the jig remote controller and adjust A to position the dot
mark in the center to the exact vertical centre of the crosshatch pattern on the screen
and regularize the squares of the crosshatch pattern. (Fig. 3-5)
NTSC
Adjustment Menu No. 85
Input signal : Crosshatch
Measuring instrument : Pattern generator / NTSC
• Using the "CHANNEL" key, scroll through the adjustment menu and select No. 85.
To adjust, follow the same procedure as PAL.
3-6. SUB TINT Sub-Tint Adjustment
Adjustment Menu No. 30 (Page 3-6)
Input signal : Color bar (VIDEO IN)
Measuring instrument : Oscilloscope
Pattern generator / NTSC
Test point : CNA3013PIN
1. Connect oscilloscope to the test point.
2. Using the volume keys on the jig remote controller, adjust the top
excursions of waveform to be linear. (Fig. 3-6)
4. V LINEARITY Vertical Linearity Adjustment
PAL
Adjustment Menu No. 4
Input signal : Monoscope (LION MARK)
Measuring instrument : Monoscope / PAL
• Use the "CHANNEL" keys to scoll through the adjustment menu and set to
No. 4.
• Use the volume keys on the jig remote controller to adjust the circular
figures on monoscope to be true circles. (Fig. 4)
[Simple Adjustment]
Adjustment Menu No. 4
Input signal : Crosshatch
Measuring instrument : Pattern generator / PAL
• Use the "CHANNEL" keys to scoll through the adjustment menu and set to
No. 4.
• Use the volume keys on the jig remote controller make crosshatch patterns
square.
* Check V POS (PAGE 1-2 / PAL) and V SIZE (PAGE 3-5 / PAL) after completting the adjustment. Re-position each dot in case it is not at
the right points.
B OUT
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Fig. 4