KV-DR29M81 - Sony TV Service Manual (repair manual). Page 15

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Note
Focus adjustment should be completed before W/B adjustment.

(1) Receive digital monoscope pattern.
(2) Set "A/V  CONTROL" to "STANDARD".
(3) Adjust FOCUS VR so that the center of the screen becomes

just focus.

(4) Change the receiving signal to white pattern and blue back.
(5) Confirm MAGENTA RING is not noticeable. In case

MAGENTA RING is obvious, adjust FOCUS VR to balance
between MAGENTA RING and FOCUS adjustment.

(1) Receive dot/hatch pattern DRC-MF, DRC1250, DYNAMIC.
(2) Turn FOCUS VR fully counter-clockwise.
(3) Confirm the dot shape at the screen center. (Fig. 5-4)
(4) Resume FOCUS VR.

Note
In case of turning NECK ASSY, loosen the screw 3 turns. Do not
move the position.

 OK

 Turn NECK ASSY clockwise.

 Turn NECK ASSY counter clockwise.

a

b

c

d

Permalloy assembly

1. G2 (SCREEN) ADJUSTMENT
1) Set the PICTURE and BRIGHTNESS to normal.
2) Put to VIDEO input mode without signals.
3) Connect R, G and B of the C board cathode to the

oscilloscope.

4) Adjust BRIGHTNESS to obtain the cathode voltage to the

value below.

5) Whilst watching the picture, adjust the screen VR [RV9002]

located on the C board to the point just before the retrace
lines disappear (to the point before cut-off)

0 V

2. WHITE BALANCE ADJUSTMENT
1) Set to Service Mode (Refer Section 6-1: ADJUSTMENTS

WITH COMMANDER).

2) Input white raster signal.
3) Set the following condition.

PICTURE minimum, BRIGHTNESS 50%

4) Select GCT (WHB 08) and BCT (WHB 09) with 1 and 4,

and adjust the level with 3 and 6 for the best white
balance.

5) Set the PICTURE to maximum.
6) Select GDR (WHB 05) and BDR (WHB 06) with 1 and

4, and adjust the level with 3 and 6 for the best white
balance.

7) Write into the memory by pressing [MUTING] then -.

± 2 (VDC)