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

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

4. V.STOP (V Pulse)

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