Read Sony KV-20FA210 Service Manual online
— 68 —
KV-20FA210
4-4. ID MAP TABLE
4-5. A BOARD ADJUSTMENTS
H. FREQUENCY (FREE RUN) CHECK
H. FREQUENCY (FREE RUN) CHECK
1. Input a TV mode (RF) with no signal.
2. Connect a frequency counter to base of Q502
2. Connect a frequency counter to base of Q502
(TP-25 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-27 (V OUT) or CN515 pin 6
2. Set the conditions for a standard setting.
3. Connect the frequency counter to TP-27 (V OUT) or CN515 pin 6
(V DY+) and ground on the A Board .
4. Check that V. Frequency shows 60 ± 4 Hz.
DRIVE (SCON)
1. Input a color-bar signal and set the level to 75%.
2. Set in Standard mode.
3. Activate the Service Adjustment Mode.
2. Set in Standard mode.
3. Activate the Service Adjustment Mode.
4. Set AALS, ABLS, GON and BON items. Using 3 and 6 set each to
the following values. Leave RON set to “1”.
service video rdrv
ntsc
vchp
Category
Display
Item
Mode
Item
Data
Data
Signal
Type
Type
00000000 00000000
26
AALS: OFF
(0)
ABLS: OFF (1)
R ON: ON
R ON: ON
(1)
G ON: OFF
(0)
B ON: OFF
(0)
5. Connect an oscilloscope probe to CV Board, J1751Pin 12 (KR) (Red
Out) .
6. Select SCON with 1 and 4 .
7. Adjust the value of SCON with 3 and 6 for 96 ± 3Vpp.
7. Adjust the value of SCON with 3 and 6 for 96 ± 3Vpp.
96 + 3Vpp
8. Reset AALS, ABLS, GON and BON values to “1”.
AALS: ON
AALS: ON
(1)
ABLS: ON
(0)
R ON: ON
(1)
G ON: ON
(1)
B ON: ON
(1)
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.
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.
service micro disp 48
ntsc
vchp
Category
Display
Item
Mode
Item
Data
Data
Signal
Type
Type
00000000 00000000
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
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 color-bar signal at 75%.
2. Activate the Service Adjustment Mode.
3. Set (PIC) to Max and (COL) to 50%.
4. Connect an oscilloscope probe to CV Board, CN301Pin 4 Blue Out.
5. Select the SHUE and SCOL item with 1 and 4 .
6. While showing the SHUE item, adjust the waveform with 1 and 4
2. Activate the Service Adjustment Mode.
3. Set (PIC) to Max and (COL) to 50%.
4. Connect an oscilloscope probe to CV Board, CN301Pin 4 Blue Out.
5. Select the SHUE and SCOL item with 1 and 4 .
6. While showing the SHUE item, adjust the waveform with 1 and 4
until the second and third bars show the same level
(V2 = V3 < 0.15Vp-p). Set Sub Hue -2 Step.
Model
Destination ID-O ID-1 ID-2 ID-3 ID-4 ID-5 ID-6 ID-7
KV-20FA210
US
89
23
231
35
128
48
0
150
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