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KV-25K5/29K5
:
Note: Ensure that no signal is applied to the Antenna socket while
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carrying out the following IF adjustments.
TECHNICAL
SYSTEM B/G, D/K, | &
L1.- ADJUSTMENT
GD - Secam
30
BD - Secam
31
1.
Input a 38.9Mhz carrier signal at 100dBuV to Pin 11 [IF
RC - Secam
1
output] of the tuner [TU101].
fee Secan:
19
2;
Measure the voltage at Pin 17 of [IC101}.
3.
Adjust L103 [A Board] to obtain a voltage of 2.5V +/- 0.3V.
BC - Secam
10
pre anors
30
SYSTEM L BAND 1 I.F ADJUSTMENT
BD - Sports
36
RC - Sports
14
1.
Input a 34.0MHz carrier signal at 100dBuV to Pin 11 [IF
GC - Sports
15
output] of the tuner [TU101].
BC - Sports
17
2.
Select 'system L' + C00 [channel 00].
Y - Delay (AV)
07
3.
Measure the voltage at Pin 17 [[C101].
4.
Adjust RV101 [A Board] to obtain a voltage of 2.5V +/- 0.3V.
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SUB BRIGHTNESS ADJUSTMENT
TUNER AGC ADJUSTMENT
1.
Input a Phillips colour 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.
SUB CONTRAST ADJUSTMENT
®
1.
Input a video signal that contains a small 100% white area on a
black background
_
Receive a signal of 65dBuV / 75 ohm terminated, via the tuner
antenna socket.
Connect a voltmeter to JW130 [A Board].
Enter into the 'Test Menu'.
Select the 'AGC Adjust' menu item.
Adjust the data using the Yellow and Green buttons on the
Remote Commander to obtain a voltage of 3.0V +/- 0.2V.
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2
Set the picture control to maximum. ['TTO1']
3
Connect an oscilloscope to Pin | of CN504 [A Board].
4.
Enter into the 'Picture' service menu.
5
Adjust the 'R - Drive' data to obtain the following waveform.
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' 25" 2.21V +/- 0.01V
! 29" 2.52V +/- 0.01V
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R - out Waveform
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 'Picture' service menu.
4
Adjust the 'Sub Colour' data so that the Cyan, Magenta and
Blue colour bars are of equal levels as indicated below.
Same Level
A Board component side
B-Out Waveform
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