Sony KV-21FX30B Sub Colour Adjustment, Tuner AGC Adjustment, Deflection System Adjustment

Sub Colour Adjustment

1.Receive a PAL colour bar signal.

2.Connect an oscilloscope to Pin 5 of CN003 [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.

Same Level

B-Out Waveform

Tuner AGC Adjustment

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.

1.Receive a signal of 62dBuV / 75 ohm terminated via the tuner antenna socket.

2.Connect a voltmeter to pin1 of TU101 [print side of A Board] or to the AGC pin of CN001 [mount side of A Board].

3.Confirm that the AGC voltage is 3.5volts +/- 0.3volts.

4.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.

Deflection System Adjustment

1.Enter into the ‘Geometry’ service menu.

2.Select and adjust each item in order to obtain the optimum image.

GEOMETRY
V-Linearity	(0, 63)	Adj
V-Scroll	(0, 63)	32
Left-HBlk	(0, 15)	8
Right-HBlk	(0, 15)	6
V-Angle	(0, 63)	Adj
V-Bow	(0, 63)	Adj
H-Centre	(0, 63)	Adj
H-Size	(0, 63)	Adj
Pin-Amp	(0, 63)	Adj
U-Corner-Pin	(0, 63)	Adj
L-Corner-Pin	(0, 63)	Adj
Pin Phase	(0, 63)	Adj
V-Slope	(0, 63)	35
V-Size	(0, 63)	Adj
S-Correction	(0, 63)	Adj
V-Centre	(0, 63)	Adj
V-Zoom	(0, 63)	23
Magenta	(0, 63)	40

V SIZE

V LIN

S CORRECTION

V CENTRE

H CENTRE

H SIZE

PIN AMP

PIN PHASE

[ Print side of A board ]

CORNER PIN

V ANGLE

20