Id Map Table; A Board Adjustments - Sony KV-34FS100 Service Manual

4-5. ID MAP TABLE

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4-6. 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-25 H. DRIVE) on the A Board.
3. Check H. Frequency for 15734 ± 400/-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 CN501 pin 6
(V DY+) and ground on the A Board .
4. Check that V. Frequency shows 60 ± 5 Hz.
SUBCONTRAST ADJUSTMENT (RDRV)
1. Input a color-bar signal and set the level to 75%.
2. Set in Standard mode.
3. Activate the Service Adjustment Mode. Set color min pic max.
4. Set 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 C Board, CN705 pin 3 (Red Out)
(TP35).
6. Select SCON with 1 and 4 .
    
    
    
     
    
    
    
     
Item
Display
Data
Item
rdrv
26
7. Adjust the value of SCON with 3 and 6 for
1.90 ± 0.05Vpp.
 
 
 
 
 
 
 
 
8. Reset GON and BON values to "1".
R ON: ON
G ON: ON
B ON: ON
9. Press MUTING then ENTER to save into the memory.
10. After adjusting SCON, if still out of spec, use RDRV register as a
fi ne adjustment.
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.
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 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 C Board, CN705Pin 4 Blue Out.
5. Select the SHUE and SCOL item with 1 and 4 .
— 26 —
(1)
(1)
(1)
Display Item
Mode
Category
Item Data
service micro disp 48
ntsc
vchp
00000000 00000000
KV-27FS100/27FS200/29FS100/
32FS100/32FS200/34FS100