Focus; Screen (G2); Method Of Setting The Service Adjustment Mode; White Balance Adjustments - Sony TRINITRON KV-27S40 Service Manual

KV-27S40 / 27S45 / 27S65 / 29SL40 / 29SL40A / 29SL40C/
29SL45 / 29SL65 / 29SL65C/29XL40M / 29XL40P / 29XT11A
(3) Screen-corner Convergence
Fig. 9
Affix a permalloy assembly corresponding to the misconverged
areas:

3-3. FOCUS

1. Adjust FOCUS control for best picture.
Fig. 10

3-4. SCREEN (G2)

1. Input a dots pattern.
2. Set the PICTURE and BRIGHT controls at minimum
and COLOR control at normal.
3. Adjust SBRT, GCUT, BCUT in service mode with an
oscilloscope as shown in Fig. 11 so that voltages on the red,
green, and blue cathodes are 170Vdc.
Fig. 11
GND
4. Observe the screen and adjust SCREEN (G2) VR
to obtain the faintly visible background of dot signal.
170 V dc
170Vdc pedestal
3-5. METHOD OF SETTING THE SERVICE
ADJUSTMENT MODE
(1) SERVICE MODE PROCEDURE
1. Standby mode. (Power off)
2.
Remote Commander. (Press each button within a second.)
(2) SERVICE ADJUSTMENT MODE IN
Disp.
(Item)
SERVICE AFC
3. The CRT displays the item being adjusted.
Press 1 or 4 on the Remote Commander to
4.
select the item.
Press 3 or 6 on the Remote Commander to
5.
change the data.
6. Press then
(3) SERVICE ADJUSTMENT MODE MEMORY
7. Turn set off and on to exit.

3-6. WHITE BALANCE ADJUSTMENTS

1. Input an entire white signal.
2. Set to Service adjustment Mode.
3. Set DCOL to "0"
4. Set the PICTURE and BRIGHT to minimum.
5. Adjust with SBRT if necessary.
Select GCUT and BCUT with 1 and 4 .
6.
Adjust with 3 and 6 for the best white balance.
7.
8. Set the PICTURE and BRIGHT to maximum.
Select GDRV and BDRV with 1 and 4 .
9.
10. Adjust with 3 and 6 for the best white balance.
11. Reset DCOL to "1".
12. Write into the memory by pressing
— 26 —
on the
Item
data
0
to write into memory.
Green
Red
then .