Sony FD Trinitron KV-21LT1E User Manual
Page 21
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Deflection System Adjustment
Sub Brightness Adjustment
1.
Input a Monoscope pattern.
2.
Press ‘TEST’ ‘TEST’ 13 on the Remote Commander.
3.
Adjust the ‘Sub-Brightness’ data so that there is barely a
difference between the 0 IRE and 10 IRE signal levels.
1.
Input a video signal that contains a small 100% white area on a
black background.
2.
Connect an digital voltmeter to Pin 10 of J701 [C Board].
3.
Adjust the Sub-Contrast [‘TT11’] to obtain a voltage of
95 +0,- 5V.
Sub Contrast Adjustment
Sub Colour Adjustment
1.
Receive a PAL colour bar signal.
2.
Connect an oscilloscope to Pin 3 of CN504 [A Board].
3.
Enter into the ‘Service’ service menu.
4.
Adjust the ‘Sub Colour’ data so that the Cyan, Magenta and
Blue colour bars are of equal levels as indicated below.
Note:
Ensure that no signal is applied to the Antenna socket while
carrying out the following IF adjustments.
Same Level
B-Out Waveform
Tuner AGC Adjustment
1.
Set the “AGC adjust” register value :
•
For destination France set the value to 6.
•
All other destinations set the value to 0.
2.
Receive a signal of 64dBuV / 75 ohm terminated [62dBuV / 75
ohms for B model] via the tuner antenna socket.
3.
Connect a voltmeter to pin1 of TU101 [print side of A Board] or
to the AGC pin of CN001 [mount side of A Board].
4.
Confirm that the AGC voltage is 3.5volts +/- 0.3volts.
5.
If adjustment is required, enter into the ‘Test Menu’.
6.
Select the ‘AGC Adjust’ menu item.
7.
Adjust the data using the left and right arrow buttons on the
Remote
Commander to obtain a voltage of 3.5V +/- 0.3V.
1.
Enter into the ‘Geometry’ service menu.
2.
Select and adjust each item in order to obtain the optimum image.
[ Print side of A board ]
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