Toshiba TLP510E, TLP511E, TLP510U, TLP511U Lamp Power Supply Circuit Lamp Driver, Configuration

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2.LAMP POWER SUPPLY CIRCUIT (LAMP DRIVER)

2-1. Configuration

The lamp power supply cicrcuit receives a DC220 to 390V (primary side) from the system power supply and provides a AC voltage (70 to 100VAC at ever turning on the lamp) to turn on the lamp. Fig. 2-1-1 shows the block diagram.

		Lamp Driver
	L1				L1
		Stabilizer	Commu-		Igniter
		Stabilizer	tator		Igniter
Power input	R1		tator		L2
	R1				L2
	C1
	C1
	C2				Lamp
	C2
			Control
		I122			Mains
	Rs	I122		I121	isolated
	Rs	Cs
		1K	100nF
		1K
	CB3	CB2-1	CB2-2
	EMC GND	SCI
	(optional)
			Common	Flag

Fig. 2-1-1

The DC voltage is supplied to CB1 from the main power supply unit through an interlock switch. This voltage

becomes AC input x 2Ö2 (= 340V for AC120V input) when the lamp is off. CB2 is a connector for the lamp on control signal input (SCI) and lamp off control signal output (FLAG). When +5V is applied to SCI (CB2-1) in the standby on, I122 FET transistor turns on, the igniter develops a high voltage pulse (5 to 25 kV), and the lamp starts to light up.

The pulse normally continues to be developed until the lamp turns on (for max. 3s.). But if the lamp does not turn on, I121 does not turn on, the voltage of CB2-3 develops high. I121 turns on and develops low after the lamp turned on, the igniter circuit stops the operation. Then the AC70 to 100V is applied to the lamp.

2-1

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Contents TLP511U TLP510U TLP511E TLP510E Contents Voltage Switching Main Power Supply CircuitDescription Output ControlSupplement Over-current ProtectionOverheat Protection Configuration Lamp Power Supply Circuit Lamp DriverName Description Optical SystemXGA 1.3 inch 3 plates system Outline G.B. Drive Circuit2nd line 1st frameOperation Description Basic specificationBasic Component Outline of Liquid Crystal Panel 1 Terminal descriptionName Function 2 Input terminal function descriptionSystem Outline Microprocessor1 System block diagram 1 Terminal functions of the system microprocessor System MicroprocessorRemote Control Reception Process Power Supply Reset ProcessNon-volatile Memory Control Process RS-232C Transmission/Reception ProcessOn-screen Display Process 1 Contents of the status display signals and the logicStatus Display Process Panel System Control Process Video System Control ProcessI2C control for each kind of video system 11-1 IC control for each kind of panel system12-1 Each kind of the drive system IC control Drive System Control ProcessVarious Display Modes 14-1 Applicable signal Applicable SignalPin No Signal name Signal content 15-1 RS-232C connection signalsRS-232C Control Method 15-2 RS-232C communication conditionsCommand Content 15-3 RS-232C command listConv Forc Exchange Digital CircuitPanel Driving Timing Signal Generation Video Signal Format ConversionSignal Format Measurement PLL CircuitEach IC Description PLL IC CXA3106Q QX028 for RGB SignalsTiming Signal Generation PLD QX009 PLL IC TLC2932 QX029 for Video SignalSync Process IC SYG QX004 5. A/D Converter CXA3026Q QX201, QX401 and QX601INV QX204, QX404, QX604 Picture Size of View Conversion IC T-FORC9. D/A Converter MemoryCircuit Component Video Circuit1 Block diagram Video Signal Input Signal Switch SectionAudio Signal RGB Signal2 Internal block diagram of CXA1855Q 1. Y/C Separation Circuit Video Demodulation Block1 Terminal function of TC9090AN Video/Color Circuit 4 Pin configuration of TDA9141Pin No Name Function Luminance Y Signal Process CircuitPicture Sharpness Correction Circuit Color Signal Process CircuitPin Name Function SDA9 Block diagram of TDA4672 RGB Demodulation 4 Terminal function of TDA4780 Audio Circuit 12 Audio circuit block diagramSync Signal Process Circuit RGB Signal Switch Circuit output terminal for SYNC/GVIDEO/VD TC7S08F RGB Signal Amplifier SectionMicroprocessor Interface NON VD POS VD NEG QB012 M52347FP Input status QB025 CXA1315MHD. COMP. POS NON VD POS VD NEG HD. COMP. NEG HD. HD. Comp Power Supply Circuit Video Signal Process CircuitCCD and Drive Circuit Pre-amp and AD Coversion Circuit1 CCD camera circuit block diagram Operating Description Winding specificationCoil Terminal Turns WindingFluorescent does not turn on TroubleshootingToshiba America Consumer PRODUCTS, INC