Sony TRINITRON KV-25FX30B Service Manual page 21

Fe eeg ht itive
Receive a PAL colour bar signal.
Connect an oscilloscope to Pin 5 of CN003 [A Board].
Enter into the 'Service' service menu.
Adjust the 'Sub Colour' data so that the Cyan, Magenta and
Blue colour bars are of equal levels as indicated below.
Same Level
ae B-Out Waveform
Note:
There should be no need to adjust the AGC as this is pre-
adjusted during manufacture of the FRONTEND. If the AGC
does need adjustment then follow steps 1. to 4. below.
w
Receive a signal of 62dBuV / 75 ohm terminated via the tuner
antenna socket.
Connect a voltmeter to pinl of TU101 (print side of A Board]
or to the AGC pin of CNOOI [mount side of A Board].
Confirm that the AGC voltage is 3.5volts +/- 0.3volts.
If adjustment is required, then re-adjust the AGC variable
resistor (located at the top rear of the FRONTEND) to obtain
a voltage of 3.5V +/- 0.3V.
[ Print side of A board ]
I.
2.
Enter into the 'Geometry' service menu.
Select and adjust each item in order to obtain the optimum image.
GEOMETRY
V-Linearity
V-Scroll
Left-HBIk
Right-HBIk
V-Angle
V-Bow
AAMDAMDMDD+~AHA DMD
H-Centre
H-Size
Pin-Amp
U-Corner-Pin
L-Corner-Pin
Pin Phase
V-Slope
V-Size
S-Correction
V-Centre
V-Zoom
Magenta
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wwrewrre rere rere St
SSSSSSSsssss
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~—S
SSSsss MARMAAARH
YLLSS
moe eee ee ee ee ees a ee ee
V SIZE
V LIN
S CORRECTION
V CENTRE
H CENTRE
H SIZE
PIN AMP
PIN PHASE
CORNER PIN
V ANGLE