Toshiba TLP511U CCD and Drive Circuit, Pre-amp and AD Coversion Circuit, Power Supply Circuit

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8.CCD CAMERA CIRCUIT (For TLP511)

8-1. Outline

The camera section of the unit employs the color board camera with 3 times zoom lens. The camera video circuit is assembled in one PC board and composed of the CCD and drive circuit, pre-amp and AD converting circuit (CDS, AGC and AD), video signal process circuit (DSP, MICON) and power supply circuit.

Fig. 8-1-1 shows a block diagram of CCD camera circuit.

8-1-1. CCD and Drive Circuit

The CCD (Q101) circuit employs 1/3 inch 480,000 pixels IT-CCD. The horizontal transmission pulse (H1, H2 and RG) and vertical transmission pulse (øV1 – øV4 and SUB) are supplied through the drive signal generation circuit and vertical drive IC (Q103 and Q202) inside DSP (Q203) by 28.5 MHz clock signal output from the oscillator (Z201).

8-1-2. Pre-amp and AD Coversion Circuit

(CDS, AGC, AD)

The video signal developed from CCD (Q101) enters the pre-amp IC (Q201) through the buffer (Q102).

After the signal is processed the noise reduction process (CDS) inside the IC and amplified (AGC), the signal is converted to AD, and then output as 10 bits digital data.

8-1-3. Video Signal Process Circuit

(DSP, MICON)

The video signal, which became 10 bits digital data, enters the DSP (Q203) for video signal process. After the signal is separated into the luminance and color signals, the signal process is carried out on the luminance and color signals respectively and DA-converted.

The luminance signal adds the sync signal and passes through 7 MHz low pass filter. The color signal is developed through the video driver IC (Q206) after passing 4.43 MHz band pass filter.

All kinds of parameters on DSP (Q203) are set up by the microprocessor (Q303) and picture quality adjustment, etc. are carried out.

These parameters are memorized in the E2PROM (Q306). Also, the zoom, focus, etc. controls of lens are carried out by communicating with the external device through RS-232C driver IC (Q304).

8-1-4. Power Supply Circuit

The power supply circuit generates DC voltages (+15V, +5V, +3.3V, –8.2V) necessary to the camera signal process and power supply voltage (+9V, +5V) for lens. Lens +9V, develops the power supply voltage (+9V) entered from outside directly and for lens +5V, input +9V is developed through the regulator IC (Q801).

The signal process +5V develops the power supply voltage (+5V) entered from outside directly and the signal process +3.3V, the input +5V is developed through the regulator IC (Q802). The DC voltage of +15V, –8.2V are developed from the constant voltage circuit through the change pump circuits of Q804 – Q806.

8-1

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Contents TLP511U TLP510U TLP511E TLP510E Contents Output Control Main Power Supply CircuitVoltage Switching DescriptionOverheat Protection Over-current ProtectionSupplement Configuration Lamp Power Supply Circuit Lamp DriverName Description Optical SystemXGA 1.3 inch 3 plates system Outline G.B. Drive Circuit2nd line 1st frame1 Terminal description Basic specificationOperation Description Basic Component Outline of Liquid Crystal PanelName Function 2 Input terminal function descriptionSystem Outline Microprocessor1 System block diagram 1 Terminal functions of the system microprocessor System MicroprocessorRS-232C Transmission/Reception Process Power Supply Reset ProcessRemote Control Reception Process Non-volatile Memory Control ProcessStatus Display Process 1 Contents of the status display signals and the logicOn-screen Display Process 11-1 IC control for each kind of panel system Video System Control ProcessPanel System Control Process I2C control for each kind of video systemVarious Display Modes Drive System Control Process12-1 Each kind of the drive system IC control 14-1 Applicable signal Applicable Signal15-2 RS-232C communication conditions 15-1 RS-232C connection signalsPin No Signal name Signal content RS-232C Control MethodCommand Content 15-3 RS-232C command listConv Forc Exchange Digital CircuitPLL Circuit Video Signal Format ConversionPanel Driving Timing Signal Generation Signal Format MeasurementEach IC Description PLL IC CXA3106Q QX028 for RGB Signals5. A/D Converter CXA3026Q QX201, QX401 and QX601 PLL IC TLC2932 QX029 for Video SignalTiming Signal Generation PLD QX009 Sync Process IC SYG QX004INV Memory Picture Size of View Conversion IC T-FORCQX204, QX404, QX604 9. D/A ConverterCircuit Component Video Circuit1 Block diagram RGB Signal Input Signal Switch SectionVideo Signal Audio Signal2 Internal block diagram of CXA1855Q 1 Terminal function of TC9090AN Video Demodulation Block1. Y/C Separation Circuit Video/Color Circuit 4 Pin configuration of TDA9141Pin No Name Function Luminance Y Signal Process CircuitSDA Color Signal Process CircuitPicture Sharpness Correction Circuit Pin Name Function9 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 HD. COMP. POS NON VD POS VD NEG HD. COMP. NEG HD. HD. Comp QB012 M52347FP Input status QB025 CXA1315MNON VD POS VD NEG Pre-amp and AD Coversion Circuit Video Signal Process CircuitPower Supply Circuit CCD and Drive Circuit1 CCD camera circuit block diagram Winding Winding specificationOperating Description Coil Terminal TurnsFluorescent does not turn on TroubleshootingToshiba America Consumer PRODUCTS, INC
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