Sony BA-4D Servis Kılavuzu - Sayfa 7

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Sony BA-4D Servis Kılavuzu
Feature ID Map
1
27S42
US
25 145
2
27S42
CND
89 145
3
27S46
US
25 155
4
27S66
US
25 155
5
27S66
CND
89 155
6
29AL42
E
17 147 173 203 123
7
29AL42C
E
17 147 173 203 123
8
29AL66
E
17 151 237 203 123
9
29AL66C
E
17 151 237 203 123
10
29SL42
E
17 145 143 203 123
11
29SL42C
E
17 145 143 203 123
12
29SL46
E
17 155 143 203 123
13
29XL42M MX
17 145 143 203 123

5-4. A BOARD ADJUSTMENTS

H. Frequency (Free Run) Check
1. Input a TV mode (RF) with no signal.
2. Connect a frequency counter to base of Q501
(TP-500 H. DRIVE).
3. Check H. Frequency for 15735 ± 200 Hz.
V. Frequency (Free Run) Check
1. Select video 1 with no signal input.
2. Set the conditions for a standard setting.
3. Connect the frequency counter on the A board to TP-508
(V OUT) or CN 501 pin
4. Check that V. Frequency shows 60 ± 4 Hz.
Sub Contrast Adjustment (RDRV)
1. Input a color-bar signal and set the level to 75%.
2. In Standard mode, set PICTURE to maximum, COLOR to
minimum, and BRIGHTNESS to center.
3. Activate the Service Adjustment Mode.
4. Set both GON and BON items. Using
set each to the following values. Leave RON set to 1.
SERVICE
RON
R ON:
ON (1)
G ON:
OFF (0)
B ON:
OFF (0)
15 235
11
3
0 64
15 135
11
3
0 64
15 235
11
3
1 64
79 235
11
3
7 64
79 155
11
3
7 64
3
0 64
3
0 64
3
7 64
3
7 64
3
0 64
3
0 64
3
1 64
3
0 64
(V DY+) and ground.
and
;
1
1: ON
0: OFF
— 21 —
KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/
29AL66C/29SL42/29SL42C/29SL46/29XL42M
5. Select the item DCOL item and set it to 0.
6. Connect an oscilloscope probe to CN301 pin
OUT).
7. Select RDRV with
and
8. Adjust the value of RDRV with
1.75 ± 0.05 Vp-p.
9. Reset the item DCOL to 1.
10. Reset GON and BON values to 1.
R ON:
ON (1)
G ON:
ON (1)
B ON:
ON (1)
11. Reset Picture, Color, and Bright to normal values:
PICTURE: MAX
COLOR:
CENTER
BRIGHT:
CENTER
12. Press
then
Display Position Adjustment (DISP)
1. Input a color-bar signal.
2. Set to Service Adjustment Mode.
3. Select DISP with
and
4. Adjust values of DISP with
to the center.
5. Write to memory by pressing
6. Check to see if the text is displayed on the screen.
SERVICE
Sub Bright Adjustment (SBRT)
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Set the PICTURE and BRIGHTNESS to minimum.
4. Select the SBRT item with
5. Adjust the values of SBRT with
faintly visible crosshatch.
6. Press
then
(RED
.
and
for
White
1.75 ± 0.05 Vp-p
Black
to save into the memory.
.
and
to adjust characters
then
.
DISP
15
and
.
and
to obtain a
to save into the memory.