Sony KP-43T70C Section Circuit Adjustments, TV Input SUB Contrast Adjustment VPNT-SCON

KP-43T70C/53SV70C/61SV70C

RM-Y906 RM-Y906 RM-Y906

SECTION 5

CIRCUIT ADJUSTMENTS

5-1. TV INPUT SUB CONTRAST ADJUSTMENT (VPNT-SCON)

1.	Receive the color-bar signal.
2.	Mode	: Personal 1 or 2.
	PICTURE	: maximum
	COLOR	: minimum
	BRIGHTNESS	: center
	TRINITONE	: medium
	ABL	: CN801 pin 4open
	SERVICE DATA VPNT SCON	: 7

3.Set to service mode.

4.Connect an oscilloscope between pin 7 of CN204 (A board) and ground.

5.Select “ VPNT-SCON ”, and adjust so that the wave from level is 1.80 ± 0.05Vp-p.

6.Write the data into memory. MUTING n ENTER

White

1.80 ± 0.05Vp-p

Black

Fig. 5-1

5-2. VIDEO INPUT SUB-HUE AND SUB-COLOR ADJUSTMENT (VPNT-SHUE, SCOL)

1.	Select VIDEO1 input and supply the color-bar signal.
2.	Mode	: Personal 1 or 2.
	PICTURE	: maximum
	COLOR	: center
	BRIGHTNESS	: center
	TRINITONE	: medium
	SERVICE DATA VPNT-SHUE	: 7
	VPNT-SCOL	: 7

3.Set to service mode.

4.Connect an oscilloscope between pin 5 of CN204 (A board) connecter and ground.

5.Select “ VPNT-SHUE, SCOL ”, and adjust them to have VB1 = VB4 and VB2 = VB3 in the waveform levels.

6.Increase SCOL by 2 steps.

7.Write the data into memory. MUTING n ENTER

5-3. COMPONENT INPUT SUB-HUE AND SUB-COLOR ADJUSTMENT (DAC-UVSH, UVSC)

1.Select VIDEO 4 and supply the color-bar signal. VIDEO input

2. Mode	: Personal 1 or 2.
PICTURE	: maximum
COLOR	: center
BRIGHTNESS	: center
TRINITONE	: medium
SERVICE DATA DAC UVSH	: 31
DAC UVSC	: 31

3.Set to service mode.

4.Connect an oscilloscope between pin 5 of CN204 (A board) connecter and ground.

5.Select “ DAC-UVSH, UVSC ”, and adjust them to have VB1 = VB4 and VB2 = VB3 in the waveform levels.

6.Write the data into memory. MUTING n ENTER

VB1 VB2 VB3 VB4

Fig. 5-3

5-4. P & P SUB CONTRAST ADJUSTMENT (SC-SYDR)

1. Receive the signal.
TV terminal (sub)	: color-bar signal

VIDEO terminal (main) : no signal

2.Set to service mode and set to P & P mode.

3.Connect an oscilloscope between pin 7 of CN204 (A board) and ground.

4.Select “ SC-SYDR ”, and adjust so that the wave from level is 1.65 ± 0.05Vp-p.

5.Write the data into memory. MUTING n ENTER

White

1.65 ± 0.05Vp-p

Black

Fig. 5-4

VB1 VB2 VB3 VB4

Fig. 5-2

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