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Hitachi 22LD3750DC, Руководство по обслуживанию

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4

 
Back End 

 

 

MST-TSUMU38BF has two ADC inputs. First ADC input is assigned to the VCTI RGB output. 

Other RGB/YPbPr inputs are multiplexed for the second ADC input. HDMI receiver ANX9021 analog 
output, VGA RGB input and the synchronization signals are multiplexed by a primary RGB switch 
(PI5V512). MST-TSUMU38BF has an embedded LVDS transmitter. There are three PWM output ports. 
PWM0 is assigned to analog/digital dimming control for the backlight, PWM1 is used for backlight 
on/off and panel logic power supply on/off control and PWM2 is used to control PC/HDMI switch IC 
(PI5V512). 
 
 

3 POWER STAGE  

 

The DC voltages required at various parts of the chassis and inverters are provided by a main power 

supply unit and power interface board. IPS generates 12V and 5V DC supply. Power stage which is 
on-chasis gen12V for audio amplifier and 5V stand by voltage and 33V, 12V, 5V, 3.3V and 1.8V 
supplies for other different parts of the chassis. 

 

4 MICROCONTROLLER PORT CONFIGURATION 

 

PIN 
NO 

 

PORT 
NAME 

 

SIGNAL NAME 

 

TYPE  FUNCTION 

 

47  

P10  

MST_RESET  

O  

Scaler reset  

 

 

PROTECT  

I  

Short circuit detection  

48  

P11  

TV_RXD  

I  

IDTV UART receive signal  

49  

P12  

TV_TXD  

O  

IDTV UART transmit signal  

50  

P13  

IRQ  

O  

IDTV interrupt request signal  

51  

P14  

KEY  

I  

Keyboard function select  

52  

P15  

SC_PIN8  

I  

Scart function select  

53  

P16  

DVD_IR_ON/OFF   O  

DVD infrared signal on/off control  

54  

P17  

POWCON  

O  

Standby on/off control  

 
 
 
 
 
 
 
 
 
 

 

Содержание 22LD3750DC

Страница 1: ...r die Sicherheitshinweise und Hinweise zur Produktsicherheit in diesem Wartungshandbuch zu lesen SERVICE MANUAL MANUEL D ENTRETIEN WARTUNGSHANDBUCH Data contained within this Service manual is subject to alteration for improvement Les données fournies dans le présent manuel d entretien peuvent faire l objet de modifications en vue de perfectionner le produit Die in diesem Wartungshandbuch enthalte...

Страница 2: ... 10 6 1 Microcontoller Video Audio Processor VCT4953G 10 6 2 Scaler De interlacer MST TSUMU38BF 13 6 3 Audio Stage LM358D MP7721 16 6 4 HeadPhone Amplifier TDA1308T 16 6 5 Audio Matrix Switch TEA6422D 19 6 6 HDMI Receiver ANX9021 19 6 7 Video Switch PI5V512 20 6 8 Tuner DTT71306 21 6 9 SAW Filter X6966M 22 6 10 I2C Switch 74HCT4053 22 6 11 Audio DAC CS4334 23 6 12 IC E2PROM 24LC02 2Kbx8 24 6 13 SP...

Страница 3: ... 2 GENERAL DESCRIPTION The system is a low to mid end 22 1680 x 1050 TFT TV solution basically for EU market with VCT4913G microcontroller video audio processor chip on a 2 layer PCB Since the target market is EU the first release of the TV will support PAL SECAM B G D K I L L The target panel is 22 W 1680 x 1050 TFT LCD panels A DVD loader is used to read DVD content and a DVB T module card is us...

Страница 4: ...er Control SRS TRU Surround OPT SRS TRU Bass OPT BBE WOW OPT Picture Features WIDE PANEL 4 3 16 9 Auto opt Subtitle opt Zoom opt Panoramic opt Picture Modes Bright Standard Soft Media Window Enhancement MWE Backlight brightness setting movie normal bright Multi System Reception PAL SECAM BG DK I I L L NTSC Video Playback WSS 16 9 4 3 Aspect Ratio Auto Switch Channel Type Sorting Favorite Sport Mus...

Страница 5: ...or etc The IC also has a teletext decoder with fastext memory The processed video output is sent to MST TSUMU38BF scaler deinterlacer in RGB format together with a composite sync The TV tuner is PLL controlled symmetrical IF output type The IF signal is filtered by a single SAW filter Inter carrier sound demodulation is performed by the system After the SAW filter block IF signal is processed by V...

Страница 6: ...The DC voltages required at various parts of the chassis and inverters are provided by a main power supply unit and power interface board IPS generates 12V and 5V DC supply Power stage which is on chasis generates 12V for audio amplifier and 5V stand by voltage and 33V 12V 5V 3 3V and 1 8V supplies for other different parts of the chassis 4 MICROCONTROLLER PORT CONFIGURATION PIN NO PORT NAME SIGNA...

Страница 7: ...trol for tuner 27 P22 WP O Write protection control for NVM 28 P23 IR I Infrared input Table 4 1 VCTI port configuration 5 SIDE BOARDS CONNECTORS 5 1 Keyboard A four pin connector is used between 17mb29 and the keyboard KEY signal is sent directly to microcontroller ADC port and depending on the voltage level of KEY signal microcontroller performs one of these actions menu program program volume v...

Страница 8: ...wer up the LED board 5 3 DVB T module board DVB T module board TDM1300 is used to receive digital terrestrial broadcast signals Three cables are used to connect 17MB29 and TDM1300 power data and IF 12V 500mA is sent to TDM1300 by power cable Analog RGB YPbPr CVBS stereo audio tuner control SCL SDA AGC and three GPIO port outputs of TDM1300 together with UART ports TV_RXD TV_TXD IRQ are carried by ...

Страница 9: ...er of 17MB29 is used for both analogue and digital reception Tuner is controlled by either the 17MB29 microcontroller VCTI or TDM1300 board microcontroller The IF intermediate frequency output of the tuner is sent to TDM1300 board for digital reception ...

Страница 10: ...ee cables are used to connect 17MB29 and DVD electronic card power data and sense 12V 500mA is sent to DVD electronic card by power cable Y C and or CVBS video stereo audio outputs and infra red input of DVD module board is carried on data cable When a DVD is inserted into the loader the DVD electronic card sends an interrupt signal DVD_SENSE to the 17MB29 microcontroller ...

Страница 11: ...panel LCD module PIN7 signal is a logic 1 or 0 signal depending on the panel type 5 6 IPS Power Card This product include AC DC flyback converter DC DC converter and DC AC half bridge converter There are two option whose total output power are 52W and 55W This system does not have PFC Power Factor Correction coil ...

Страница 12: ...10 ...

Страница 13: ...PECIFICATIONS 6 1 Microcontroller Video Audio Processor VCT4913G VCTI49xy is composed of microcontroller video proccessor display and deflection processor sound proccessor and IF blocks as shown in figure below ...

Страница 14: ...and PMQFP144 PSSDIP88 package is chosen because of its convenience in the soldering process PSSDIP88 package has two versions 1 and 2 PSSDIP88 2 package is the pinning mirrorred version of PSSDIP88 1 and is preferred to be used for layout compatibility ...

Страница 15: ...13 ...

Страница 16: ...e MST517A M also integrates intelligent power management control capability for green mode requirements and spread spectrum support for EMI management The TSUMU38BF also incorporates a new Dynamic Frame Rate DFR generator for the digital output video to the display panel that preserves the advantages of a fixed output clock rate while eliminating the output end of frame short line MST has a built ...

Страница 17: ...FUNCTION 4 PWM0 AN DIG_DIM O Analog or digital dimming control 55 PWM1 BKL_ON OFF O Backlight On Off Control PVCC_ON OFF O Panel Logic Power On Off control 196 PWM2 PC HDMI_SW O Video switching control Table 6 2 1 MST5x7A M port allocation ...

Страница 18: ...It is one of MPS second generation fully integrated audio amplifiers which dramatically reduces solution size by integrating the following 250mΩ power MOSFETs Startup Shutdown pop elimination Short circuit protection Mute Standby The MP7721 utilizes a single ended output structure capable of delivering 2 x 10W into 8Ω speakers MPS Class D Audio Amplifiers exhibit the high fidelity of a Class A B a...

Страница 19: ...17 ...

Страница 20: ...clicks Power supply ripple rejection Low power consumption Short circuit resistance High performance high signal to noise ratio high slew rate low distortion Large output voltage swing 6 5 Audio Matrix Switch TEA6422D TEA6422D is a bus controlled audio matrix switch in an SO28 plastic monopackage The main features of TEA6422 D are 6 stereo inputs 3 stereo outputs Gain control Cascadable 2 differen...

Страница 21: ...ecom a nd datacom applications Applying the same advanced techniques in ANX9021 allows displays systems to achieve errorfree HDMI reception over long inexpensive cables up to 20 meters and assure the widest ran ge of interoperability against uncertain qualities of cheap cables from lowcost suppliers as the standard ma tures The ANX9021 can receive and output up to eight digital audio channels at u...

Страница 22: ...mute Integrated HDCP decryption engine and pre programmed keys Programmable power management with automatic shutdown for power conservation Supports automated link integrity checking 144 lead TQFP package supporting lead free and green requirements 6 7 Video Switch PI5V512 PI5V512 is a wide bandwidth 5 port 2 1 mux demux video switch with High Z outputs The main features of PI5V512 are High perfor...

Страница 23: ...tal terrestrial tuner designed for reception in VHF I VHF III and UHF compliant with the European digital terrestrial standard ETS 300744 and CENELEC standards EN 55013 and EN 55020 It covers all channels from 44 25 MHz to 863 25 MHz The main features of DTT713xx are Integrated tuner for digital and anlog broadcasting Low phase noise high sensitivity performance Small size 50mm x 35mm x 12mm Inter...

Страница 24: ...SAW Filter X6966M 6 10 I2C Switch 74HCT4053 74HCT4053 is a triple 2 channel analog mux demux with a common enable input Each multiplexer demultiplexer has two independent inputs outputs nY0 and nY1 a common input output nZ and three digital select inputs S1 to S3 ...

Страница 25: ...og lowpass filter This architecture allows for infinite adjustment of sample rate between 2 kHz and 100 kHz simply by changing the master clock frequency The main features of CS4334 are Complete stereo DAC system interpolation D A output analog filtering 24 bit conversion 96dB dynamic range 88dB THD N Low clock jitter sensitivity Single 5V power supply Filtered line level outputs On chip digital d...

Страница 26: ...witch controls analog and digital voltages that may vary across the full power supply range from VCC to GND The device has been designed so the ON resistance RON is much lower and more linear over input voltage than RON of typical CMOS analog switches The channel select input structure provides protection when voltages between 0V and 5 5V are applied regardless of the supply voltage This input str...

Страница 27: ...25 ESD Performance HBM 2000V MM 200V Chip Complexity 38 FETs ...

Страница 28: ...26 ...

Страница 29: ...FUNCTION XX782 4 14 8 1 1 17 LD 69 FRONT COVER LCD22784 W H LENS LED 2832 WRF LENS IR 21005 H1 6 H2 5 SCREW P C ZN YSB 3 x 6 5 BUTTON STAND BY1709W SCREW PC ZN YFMB 3x9 5 SPEAKER 16 R 5 W 31x94 mm ROHS BUT FUN 1709W KROM MET KAPLAMA 17 TK 83S 2 1 1 4 1 2 1 1 1 1 1 DISPLAY 22W SCREW PC ZN YFMB 3x9 5 2 COVER FOOT LCD 2293 1 18 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Description No Qty ...

Страница 30: ... 1 TP130 1 2 C129 27p 50V DVD_Y 1 2 C128 27p 50V 1 TP129 1 2 C130 27p 50V 1 2 R215 100R 1 2 R214 100R 5V 1 2 3 D 1 24 BAV9 9 1 2 C466 100p 50V 1 2 R310 10k 1 2 R172 4k7 1 2 R173 4k7 1 2 C124 27p 50V 1 2 R412 75R 1 2 3 CN104 1 2 C422 50V 4n7 1 2 3 Q111 BC848B 1 2 R418 75R 1 2 R212 100R 1 2 3 4 5 6 7 8 9 10 11 12 CN121 1 2 R164 3k9 SC_IN_R 1 2 D 1 02 C12V 1 2 D103 C12V 1 2 C348 150p 50V 1 2 D131 C5V...

Страница 31: ...V 12 F151 600R 12 F139 600R 12 R222 100R 12 C181 100n 16V 12 C200 100n 16V 12 C452 22p 50V 12 C453 22p 50V 1 2 C179 100n 16V 12 F149 600R 1 2 C182 100n 16V 12 F150 600R 1 2 C180 100n 16V 12 F105 200R 12 F102 330R 1 2 C183 100n 16V 12 F101 330R 12 S116 12 C202 100n 16V 1 2 C426 10n 16V 12 F137 600R 1 2 C164 1n 50V 12 R393 1k 1 2 C177 100n 16V 1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19 20 21 22 23...

Страница 32: ...1k HSYNC0 VSYNC0 1 2 C330 220n 10V 2 1 16V 100n C215 12 R190 4k7 PWM0 12 R328 10k 1 2 3 Q134 BC848B 1 2 3 Q133 BC848B 12 R326 10k 12 R327 10k 5V 12 R370 22k 1 2 C224 100n 16V 12 R254 5k6 12 R253 5k6 PWM2 12 R580 2k2 12 R283 470R 12 R439 2k2 1 2 3 Q130 BC848B 12 R399 1k 1 2 C229 100n 16V 1 2 C230 100n 16V 1 2 C228 100n 16V 1 2 C225 100n 16V 1 2 C223 100n 16V 1 2 C218 100n 16V 1 2 C226 100n 16V 1 2 ...

Страница 33: ...R478 220R 12 R477 680R 1 2 C261 100n 16V 1 2 C262 100n 16V 1 2 C159 100u 6V3 1 2 C160 100u 6V3 1 2 3 4 U707 LM1117 12 R376 22k 12 R375 22k 1 2 C258 100n 16V 1 2 C142 470u 16V 1 2 C141 470u 16V 1 2 3 4 5 JK107 1 2 CN101 12 R256 5k6 12 C370 8n2 50V 12 R344 10k 12 R382 27k 12 R171 3k9 1 2 C443 22u 16V 1 2 C254 100n 16V 12 L106 22u 12 D122 SS33 1 2 C645 10n 16V 1 2 3 45 6 7 8 U697 MP1593 1 2 C249 100n...

Страница 34: ...C169 1n 50V 12 S143 12 C438 10p 50V 12 R238 100R 1 2 3 Q149 BC848B 12 R196 4k7 12 C167 1n 50V 12 R127 150R 12 C376 1u 50V 3V3 12 R156 220k 12 R423 39k 12 F116 60R 12 C170 1n 50V 12 F141 600R 1 2 3 4 5 6 7 8 9 JK108 12 C264 100n 16V 12 R239 100R 12 R301 47k 12 R300 47k 12 D115 1N4148 12 R377 22k 12 S139 1 2 3 Q147 BC848B 1 2 3 Q146 BC848B 5V_HP SDA_5V SCL_5V 12 R284 470R SWITCH_SOUND_R HDMI_R_IN HD...

Страница 35: ...7 8 R410 33R 12 R364 10k 1 2 C303 100n 16V 12 R247 100R 12 F145 600R 1 2 C310 100n 16V 1 2 C146 10u 16V 12 R148 47R 12 R287 330R 1 2 C307 100n 16V 12 R245 100R 12 R244 100R HDMI1_HP HDMI0_HP DVDD18 DVDD33 DVDD18 DVDD33 DVDD18 DVDD33 AVDD33 HDMI1_D1N HDMI1_D1P AVDD33 HDMI1_D2N HDMI1_D2P AVDD33 HDMI1_D0N HDMI1_D0P HDMI1_CLKP HDMI1_CLKN AVDD33 AVDD33 HDMI0_D2P HDMI0_D2N AVDD33 AVDD33 HDMI0_D1N HDMI0_...

Страница 36: ...M_Y HDMI_PB TDM_PB 12 S204 12 S203 GAIN2 VGA_G RAIN GAIN 12 C586 47n 16V BIN0P RIN0P GIN0P 12 C605 1n 50V 1 2 C653 10p 50V 12 R538 470R 12 R525 47R 12 C583 47n 16V 12 C582 47n 16V 1 2 C652 10p 50V 1 2 C651 10p 50V SOY 12 R524 47R 12 R522 47R 12 S201 5V 1 2 C633 100n 16V 12 F179 600R 12 3 D157 BAV9 9 12 C574 4u7 10V 12 R568 75R 1 2 C650 10p 50V SIDE_PR1 12 F178 600R 5V 1 2 C632 100n 16V 12 F177 600...

Страница 37: ...147 Milano Italia ITALY Tel 39 02 487861 Tel 39 02 38073415 Servizio Clienti Fax 39 02 48786381 2 Email customerservice italy hitachi eu com HITACHI Europe AB Box 77 S 164 94 Kista SWEDEN Tel 46 0 8 562 711 00 Fax 46 0 8 562 711 13 Email csgswe hitachi eu com HITACHI EUROPE S A S Lyon Office B P 45 69671 BRON CEDEX FRANCE Tel 33 04 72 14 29 70 Fax 33 04 72 14 29 99 Email france consommateur hitach...

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