Self-diagnosis function operation, OVP Detect | Sony KP-43T75A

	KP-43T75A/53SV75A
	RM-Y906 RM-Y906
6. Self-diagnosis function operation
OCP	Low B and +B line detect DET SHORT, and shut-down POWER ON RELAY.
	Reset by turning power on/off.
	In case of +B is loaded approx. 1.3A or more, microcomputer detects it via IC651.
OVP	In case of +B becomes approx. 150V or more, POWER ON RELAY shuts down and microcomputer detects it via IC651.
	Reset by turning power on/off just the same as OCP.
V Stop	In case of microcomputer detects 2 seconds or more interval of V Pulse, Reference Pulse turns off by turning off the picture
	signal in YC Jungle IC (IC206).
	After the picture signal turns off, V Pulse is regenerated 2 seconds or more, the picture signal turns on.
AKB	IK detection. Makes LED blinking in case of microcomputer doesn’t detect IK returns of IC206 CXA2135 30 seconds or more.
H Stop	In case of HV becomes 33kV or more, IC502 detects it and shut-down H Drive Pulse.
	Microcomputer receives H Stop data from IC206 and makes LED blinking.
Audio	In case of DC component overlaps the output of Audio Amp., microcomputer detects it and makes LED blinking.
	Microcomputer forces to shut down the power.

Self-diagnosis block diagram

				D1201
			TIMER/STANDBY
						Q007
		55		5. AKB
				5. AKB
				6. H STOP
8		IC002	49		34	IC206	18
8		IC002	49		34	CXA2135	13	6. HV STOP
	∝ Processor		47		35		13
	∝ Processor		47		35		14
			50	BUS		YCJ	14	IC502
			50	BUS				IC502
20	21	22	48					HV Detector
20	21	22				21
			IC004
		EEPROM
						IC1509
						V Drive
								Q1505
				5. AKB				V Pulse Buffer
				5. AKB
			IC406					C Board
			Audio AMP
		Audio		DC Detect
				DC Detect
	3. OVP			IC651		OVP DETECT
				IC651		OVP DETECT
	2. OCP		OVP Buffer
	2. OCP		OCP Buffer			OCP DETECT
			OCP Buffer			OCP DETECT

4. V.STOP (V Pulse)

– 5 –

Image 5

Sony KP-43T75A, KP-53SV75A service manual Self-diagnosis function operation, Self-diagnosis block diagram, OVP Detect

Contents

Color Rear Video Projector KP-43T75A/53SV75A Specifications Self Diagnosis Function Blinking count display of TIMER/STAVDBY indicatorSummary of Self-Diagnosis Function Diagnosis Items and Prediction of Malfunction Location Self-Diagnosis Screen Display Self-diagnosis screen displays OVP Detect Self-diagnosis block diagramSelf-diagnosis function operation Circuit Adjustments Table of ContentsDisassembly SET-UP Adjustments Section General Remote Control Carrying Your Projection TV Installing the Projection TV Making Connections Connector Types Connecting 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 editing Setting Up the Projection TV Automatically Using the Remote ControlConnecting an audio system Upper illustration Inserting the batteries To perform Auto SET UP again Adjusting the Convergence Automatically Flash Focus Watching the TV Watching Two Programs at One Time PIP To exit from the menus at any time Learning Menu Selection Using the Audio Menu Using the Video MenuTo restore the factory settings To select the Video menu To select the Reloj menu Using the Reloj Menu To select the Ajustes de canal ch menu Ch Using the Ajustes de canal Menu Setting Canal favorito manually Setting and Selecting Canal favoritoUsing Canal favorito Changing Canal favorito choices To select the Ajustes menu Using the Ajustes Menu Setting 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-53SV75A KP-43T75A HA, HB and FB Board Removal Mirror Cover Removal Picture Tube Removal A, G and FA Boards Removal HIGH-VOLTAGE Cable InstallationRemoval Section SET-UP Adjustments Pole Magnet Adjustment GREEN,RED Focus VR AdjustmentPole Magnet Adjustment Defocus Adjustment Blue Data Electrical Adjustment by Remote CommanderAdjusting Buttons and Indicator Adjustment Data Standard Number Range Service Mode List KP- RM Adjustment Data Standard Number DAC D/A Converter CCD Closed Caption Decoder Setup for Adjustment Registration Adjustment PJE Green Center Green Registration Adjustment Final Check RED Registration AdjustmentBlue Registration Adjustment Error Code List Auto Registration Error Code List Section 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-SYDR Text Position Adjustment CCD-CCHP BAR Display Position Adjustment OP-DISPPIP Position Adjustment PI-PIPH, PIPV, PPH5, PPV5 Block Diagram Section Diagrams Line Video Peak Hold ResetBuff IC805 PJED-CPU To a CRR Drive Power Supply G H/V OUT Printed Wiring Boards and Schematic Diagrams Frame Schematic DiagramCircuit Boards Location Micro Inductor 3 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-T4 Board IC651 ∝ PC393C Board WaveformsBoard IC654 DM-58 CG CR CB board CB Board CB Board Waveform CR Board WaveformCG Board Waveforms CG Board Function Keys HA Board HC Board HB Board FA Board FB Board FB Power Switch NJM7805FA Semiconductors D1NL20U Cover KP-43T75A Section Exploded Views REF. NO. Part no Description Remark REF. no Cover KP-53SV75A Chassis KP-43T75A 152 113 115 Chassis KP-53SV75A Picture Tube 212 Capacitors 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