4-4. Ma Board Adjustments - Sony KV-27FS13 Service Manual

FEATURE ID MAP
Model Destination ID-0
KV-27FS13 US 89
KV-27FS13 CND 89
KV-27FS17 US 89
KV-27FV17 US 89
KV-27FV17 CND 89
KV-29FV17 E 17
KV-29FV17C E 17
KV-32FS13 US 89
KV-32FS13 CND 89
KV-32FS17 US 89
KV-34FS13C E 17
KV-34FS17 E 17

4-4. MA 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) on the A Board.
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 to TP-508 (V OUT) or CN501 pin 6
(V DY+) and ground on the A Board .
4. Check that V. Frequency shows 60 ± 4 Hz.
DRIVE (RDRV)
1. Input a color-bar signal and set the level to 75%.
2. Set in Standard Mode.
3. Activate the Service Adjustment Mode.
4. Set both GON and BON items. Using 3 and 6 set each to the
following values. Leave RON set to "1".
Mode Category
service video
Signal
Type
ntsc
vchp
00000000 00000000
R ON: ON (1)
G ON: OFF (0)
B ON: OFF (0)
5. Connect an oscilloscope probe to CB Board, J701 Pin 12 (KR) (Red
Out) .
6. Select RDRV with 1 and 4 .
7. Adjust the value of RDRV with 3 and 6 for
92.5 ± 3 VDC.
ID-1 ID-2 ID-3 ID-4 ID-5
31 79 146 137 19
31 79 178 137 19
31 79 146 137 19
63 239 146 133 19
63 239 178 133 19
63 255 130 229 19
63 255 130 229 19
31 79 146 137 19
31 79 178 137 19
31 79 146 137 19
31 223 130 233 19
31 223 130 233 19
Item
Display
Data
Item
rdrv
26
KV-27FS13/ 27FS17/ 27FV17/ 29FV17/ 29FV17C/ 32FS13/ 32FS17/ 34FS13C/ 34FS17
ID-6
0
0
7
7
7
7
7
0
8. Reset GON and BON values to "1".
0
R ON: ON
7
0
G ON: ON
7
B ON: ON
9. Press MUTING then ENTER to save into the memory.
Display Position Adjustment (DISP)
1. Input a color-bar signal.
2. Set to Service Adjustment Mode.
3. Select DISP with 1 and 4 .
4. Adjust values of DISP with 3 and 6 to adjust characters to the center.
5. Write to memory by pressing MUTING then ENTER .
6. Check to see if the text is displayed on the screen.
Mode
Signal
Type
SUB BRIGHT ADJUSTMENT (SBRT)
1. Input a monoscope signal.
2. Activate the Service Adjustment Mode.
3. Set the PICTURE and BRIGHTNESS to minimum.
4. Select the SBRT item with 1 and 4 .
5. Adjust the values of SBRT with 3 and 6 to obtain a faintly visible
crosshatch.
6. Press MUTING then ENTER to save into the memory.
SUB HUE, SUB COLOR ADJUSTMENT (SHUE,
SCOL)
1. Input a color-bar signal.
2. Activate the Service Adjustment Mode.
3. Connect an oscilloscope probe to CB Board, CN705 Pin 4 Blue Out.
4. Select the SHUE and SCOL item with 1 and 4 .
5. While showing the SHUE item, adjust the waveform with 1 and 4
until the second and third bars show the same level (V2 = V3 < 0.1
Vp-p).
6. While showing the SCOL item, adjust the waveform with 3 and 6
until the fi rst and fourth bars show the same level (V1 = V4 < 0.1
Vp-p).
7. Press MUTING then ENTER to save into the memory.
— 21 —
92.5 ± 3VDC
(1)
(1)
(1)
Display Item
Category
Item Data
service micro disp 48
ntsc
vchp
00000000 00000000
V1 V2 V3 V4