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

Page 41

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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Contents Color Rear Video Projector KP-43T75A/53SV75A SpecificationsSelf Diagnosis Function Blinking count display of TIMER/STAVDBY indicatorSummary of Self-Diagnosis Function Diagnosis Items and Prediction of Malfunction LocationSelf-Diagnosis Screen Display Self-diagnosis screen displaysOVP Detect Self-diagnosis block diagramSelf-diagnosis function operation Circuit Adjustments Table of ContentsDisassembly SET-UP AdjustmentsSection General Remote ControlCarrying Your Projection TV Installing the Projection TV Making Connections Connector TypesConnecting a camcorder Connecting a cable TV system/ antenna to a VCRConnecting a VCR and projection TV to a cable box Connecting a DVD Player Upper illustration Connecting two VCRs for tape editingSetting Up the Projection TV Automatically Using the Remote ControlConnecting an audio system Upper illustration Inserting the batteriesTo perform Auto SET UP again Adjusting the Convergence Automatically Flash FocusWatching the TV Watching Two Programs at One Time PIP To exit from the menus at any time Learning Menu SelectionUsing the Audio Menu Using the Video MenuTo restore the factory settings To select the Video menuTo select the Reloj menu Using the Reloj MenuTo select the Ajustes de canal ch menu Ch Using the Ajustes de canal MenuSetting Canal favorito manually Setting and Selecting Canal favoritoUsing Canal favorito Changing Canal favorito choicesTo select the Ajustes menu Using the Ajustes MenuSetting the Manufacturers Code To operate the projection TV Manufacturer code numbers cable boxTo operate the cable box No color Rear Board Removal Service Position Section DisassemblyHA Board and HB Board Removal Chassis Assy Removal KP-53SV75AKP-43T75A HA, HB and FB Board Removal Mirror Cover RemovalPicture Tube Removal A, G and FA Boards Removal HIGH-VOLTAGE Cable InstallationRemoval Section SET-UP AdjustmentsPole Magnet Adjustment GREEN,RED Focus VR AdjustmentPole Magnet Adjustment Defocus Adjustment BlueData Electrical Adjustment by Remote CommanderAdjusting Buttons and Indicator Adjustment Data Standard Number Range Service Mode ListKP- RM Adjustment Data Standard NumberDAC D/A Converter CCD Closed Caption Decoder Setup for Adjustment Registration Adjustment PJEGreen Center Green Registration AdjustmentFinal Check RED Registration AdjustmentBlue Registration Adjustment Error Code List Auto Registration Error Code ListSection Safety Related Adjustments +B OVP Confirmation TV Input SUB Contrast Adjustment VPTR-GDRV Section Circuit AdjustmentsTV Input SUB-HUE and SUB-COLOR Adjustment VPTR-SHUE, Scol PIP SUB Contrast Adjustment SC-SYDRText Position Adjustment CCD-CCHP BAR Display Position Adjustment OP-DISPPIP Position Adjustment PI-PIPH, PIPV, PPH5, PPV5 Block Diagram Section DiagramsLine Video Peak Hold ResetBuff IC805 PJED-CPUTo a CRR DrivePower Supply G H/V OUT Printed Wiring Boards and Schematic Diagrams Frame Schematic DiagramCircuit Boards Location Micro Inductor3 Board IC1011 CXA2079Q 3 Board Waveforms3 Board IC406 TDA7265 BV DAC 3 Board IC807, 815, 816 ∝ PD6376GS-E2? a 2/3 board 3 Board IC1902 CXA2019AQ-T4 Board3 Board IC1903 BU4053BCF-T2 3 Board IC1904 CXA1315M-T4Board IC651 ∝ PC393C Board WaveformsBoard IC654 DM-58 CG CR CB board CB Board CB Board Waveform CR Board WaveformCG Board Waveforms CG BoardFunction Keys HA Board HC BoardHB Board FA Board FB Board FB Power SwitchNJM7805FA SemiconductorsD1NL20U Cover KP-43T75A Section Exploded ViewsREF. NO. Part no Description Remark REF. no Cover KP-53SV75AChassis KP-43T75A 152 113 115Chassis KP-53SV75A Picture Tube 212Capacitors PF ∝∝ F Section Electrical Parts ListResistors 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 HC HA HB S 125 965-413-01