Sony KP-43T75A Section Circuit Adjustments, TV Input SUB Contrast Adjustment VPTR-GDRV

KP-43T75A/53SV75A

RM-Y906 RM-Y906

SECTION 5

CIRCUIT ADJUSTMENTS

5-1. TV INPUT SUB CONTRAST ADJUSTMENT (VPTR-GDRV)

1.	Receive the NTSC color-bar (white 75%) signal.
2.	Mode	: Personal 1 or 2.
	PICTURE	: maximum
	COLOR	: minimum
	BRIGHTNESS	: center
	TRINITONE	: medium
	ABL	: CN801 pin 4open
	SERVICE DATA VPTR GDRV	: 37

3.Set to service mode.

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

5.Select “ VPNT-GDRV”, 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. TV INPUT SUB-HUE AND SUB-COLOR ADJUSTMENT (VPTR-SHUE, SCOL)

1.	Receive the NTSC color-bar (white 75%) signal.
2.	Mode	: Personal 1 or 2.
	PICTURE	: maximum
	COLOR	: center
	BRIGHTNESS	: center
	TRINITONE	: medium
	SERVICE DATA VPTR-SHUE	: 32
	VPTR-SCOL	: 27

3.Set to service mode.

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

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

6.Write the data into memory. MUTING n ENTER

5-3. PIP SUB CONTRAST ADJUSTMENT (SC-SYDR)

1.	Receive the signal.
	TV terminal (sub)	: NTSC color-bar (white 75%)signal
	VIDEO terminal (main) : no signal
2.	PICTURE	: maximum
	COLOR	: minimum
	BRIGHTNESS	: center
	TRINITONE	: medium
	ABL	: CN801 pin 4 open
	SERVICE DATA	: SC-SYDR

3.Set to service mode and set to PIP mode.

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

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

6.Write the data into memory. MUTING n ENTER

1.65 ± 0.05V

(PEDESTAL TO PEEK)

Fig. 5-3

5-4. PIP SUB-HUE, SUB-COLOR ADJUSTMENT (SC-PHDR, SSCL)

1.	Receive the signal.
	TV terminal (sub)	: NTSC color-bar (white 75%)signal
	VIDEO terminal (main) : no signal
2.	PICTURE	: maximum
	COLOR	: minimum
	BRIGHTNESS	: center
	TRINITONE	: medium
	ABL	: CN801 pin 4 open
	SERVICE DATA	: SC-PHDR, SSCL

3.Set to service mode and set to PIP mode.

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

5.Select “ SC-PHDR,SSCL ”, and adjust them to have VB1=VB4 and VB2=VB3 in the wave from levels.

6.Write the data into memory. MUTING n ENTER

VB1 VB2 VB3 VB4

Fig. 5-2

VB1 VB2 VB3 VB4

Fig. 5-4

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