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Hitachi 22LD3750DC Service Manual
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Hitachi 22LD3750DC Service Manual

Hitachi 22LD3750DC Service Manual

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CAUTION:
Before servicing this chassis, it is important that the service technician read the "Safety
Precautions" and "Product Safety Notices" in this service manual.
ATTENTION:
Avant d'effectuer l'entretien du châssis, le technicien doit lire les «Précautions de sécurité»
et les «Notices de sécurité du produit» présentés dans le présent manuel.
VORSICHT:
Vor Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise" und „Hinweise
zur Produktsicherheit" in diesem Wartungshandbuch zu lesen.
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
SERVICE MANUAL
MANUEL D'ENTRETIEN
WARTUNGSHANDBUCH
Colour Television
May 2009
No. 0249
22LD3750DC
«MODEL NAMES»
22LD3750DU
Data
contained
within
this
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
enthaltenen Spezifikationen können sich
zwecks Verbesserungen ändern.
Service

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  • Page 1 No. 0249 22LD3750DC «MODEL NAMES» 22LD3750DU SERVICE MANUAL MANUEL D'ENTRETIEN WARTUNGSHANDBUCH CAUTION: Before servicing this chassis, it is important that the service technician read the “Safety Precautions” and “Product Safety Notices” in this service manual. Data contained within this Service manual is subject to alteration for improvement.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 1 INTRODUCTION ............................1 2 GENERAL DESCRIPTION ........................1 3 POWER STAGE ............................4 4 MICROCONTROLLER PORT CONFIGURATION ................4 5 SIDE BOARDS AND CONNECTORS ...................... 5 5.1 Keypad ............................5 5.2 Infrared & LED ..........................6 5.3 DVB-T ............................

  • Page 3: Introduction

    1 INTRODUCTION The purpose of this document is to define the operation of 17MB29 chassis, capable of driving 22” TFT LCD panel. It is aimed to provide information to engineering staff to understand the operation and specs of the TV. The other related technical documents are given in Table1: Title 17MB29 schematics IR receiver and LED display board schematics...
  • Page 4 General default features • Multi System Reception: PAL-SECAM BG-DK-I/I’-L/L’ • Menu system (multi language) • 100 program storage locations • OSD (on-screen display) • Teletext • IR Control (RC5 and other customer specific protocols) • “No Ident” Timer • Child Lock •...
  • Page 5 Teletext/OSD • Simple Text 10 Pages • Fastext & Top Text (OPT) • Teletext Languages (ALL) • Character Based OSD Electrical features •IPS generates 12V and 5V DC supply. •<1W standby power consumption System Building Blocks 17MB29 chassis main blocks are as follows: •Analog Front End : VCTI (Microcontroller+Video Proccessor+Audio Proccessor+IF Demodulator+ Teletext Decoder+ OSD Generator) •Back End : MST-TSUMU38BF(Scaler, Deinterlacer, OSD Generator)

  • Page 6: Power Stage

    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).

  • Page 7: Side Boards And Connectors

    PORT SIGNAL NAME TYPE FUNCTION NAME HDMI_HP_INV HDMI hot plug signal Switching control for Mstar bus and system I2C Safety VCTI_HS VCTI composite sync output FBIN DVD_SENSE DVD module detection Vert+ TV/DVB_SW IDTV/TV I2C and AGC switch control for tuner Write protection control for NVM Infrared input Table 4.1 VCTI port configuration...

  • Page 8: Infrared & Led

    5.2 Infra-red & LED A five-pin connector is used between 17MB29 and the LED board: Pin2 and pin3 carry the control signals for the LED. Pin4 carries the infra-red signal to the microcontroller. Pin5 is used to power up the LED board.
  • Page 9 TDM1300 board has no tuner on it. Instead, the tuner 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.

  • Page 10: Dvd

    5.4 DVD module board DVD module board has two parts: a loader and an electronic card. Electronic card controls the loader and has connections with 17MB29 and DVD keypad. Three 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:...

  • Page 11: Lvds

    5.5 LVDS connector MST-TSUMU38BF is used for dual LVDS output on 17MB29: Panel_Vcc1 is the power input for the 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.

  • Page 13: Ic Specifications

    6 IC SPECIFICATIONS 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.
  • Page 14 VCTI49xyl family has two package types; PSSDIP88 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.

  • Page 16: Scaler/De-Interlacer (Mst-Tsumu38Bf)

    6.2 Scaler/De-interlacer (MST-TSUMU38BF) The TSUMU38BF is total solution graphics processing ICs for LCD displays with panel resolutions up to XGA and WXGA+ / SXGA+ respectively. They are configured with a high-speed integrated triple-ADC/PLL, a high quality display processing engine, and an integrated multi-purpose output display interface that can support all major panel interface formats.
  • Page 17 PORT SIGNAL TYPE FUNCTION NAME NAME PWM0 AN/DIG_DIM Analog or digital dimming control PWM1 BKL_ON/OFF Backlight On/Off Control PVCC_ON/OFF O Panel Logic Power On/Off control PWM2 PC/HDMI_SW Video switching control Table 6.2.1: MST5x7A-M port allocation...

  • Page 18: Audio Stage (Lm358D,Mp7721)

    6.3 Audio Stage Audio Preamplifier(LM358D) These circuits consist of two independent, high gain, internally frequency compensated which were designed specifically to operate from a single power supply over a wide range of voltages. The low power supply drain is independent of the magnitude of the power supply voltage. Audio Amplifier (MP7721) The MP7721 is a stereo 2 x 10W Class D Audio Amplifier.

  • Page 20: Headphone Amplifier (Tda1308T)

    6.4 Headphone Amplifier (TDA1308T) TDA1308T is an integrated class AB stereo headphone driver contained in an SO8, DIP8, or a TSSOP8 plastic package. SO8 package is used in 17MB29. The device is fabricated in a 1mm CMOS process. The main features of this IC are: •...

  • Page 21: Hdmi Receiver (Anx9021)

    6.6 HDMI Receiver (ANX9021) The ANX9021 is an advanced multimedia receiver compliant with High Definition Multimedia Interface (HDMI) Specification 1.2. HDMI is the first transport standard to unify digital video, audio, and control da ta over lowcost cables. It connects digital television, flat panel displays and project systems digitally to multimedia sources: DVD players, high definition settop boxes, digital video tape recorders, and personal computers.Digital transmission, in turn, delivers an uncompromising multimedia experience.

  • Page 22: Video Switch (Pi5V512)

    • Analog RGB/YPbPr output with 8-bit linearity • Digital audio interface o32 to 192 kHz audio sampling rate oUp to 4 I2S interface for 8-channel audio oS/PDIF interface supporting PCM, Dolby Digital™, DTS™ digital audio transmission using IEC 60958 and IEC 61937 oConfigurable soft mute •...

  • Page 23: Tuner (Dtt71306)

    • Low On-Resistance: 5Ω • Low crosstalk at 10 MHz: –90dB • Ultra-low quiescent power (0.1µA typical) • Single supply operation: +5.0V • Fast switching: 10ns Packaging (Pb-free & Green available): 24-pin 150-mil wide plastic QSOP (Q) • 6.8 Tuner (DTT71306) DTT713xx is a digital 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.

  • Page 24: Saw Filter (X6966M)

    • General-purpose port output • Antenna power supply input 6.9 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).

  • Page 25: Audio Dac (Cs4334)

    6.11 Audio DAC (CS4334) CS4334 is a 8-pin, 24-bit, 96KHz stereo D/A converter. The CS4334 family is based on Delta-Sigma modulation, where the modulator output controls the reference voltage input to an ultra-linear analog lowpass filter. This architecture allows for infinite adjustment of sample rate between 2 kHz and 100 kHz simply by changing the master clock frequency.

  • Page 26: Spdif Switch (Nlast4599)

    6.12 IC EEPROM 2Kbx8(24LC02) The 24LC01/02 is a 1K/2K-bit serial read/write non-volatile memory device using the CMOS floating gate process.Its 1024/2048 bits of memory are organized into 128/256 words and each word is 8 bits. The device is optimized for use in many industrial and commercial applications where low power and low voltage operation are essential.
  • Page 27 • ESD Performance: HBM > 2000V; MM > 200V • Chip Complexity: 38 FETs...
  • Page 29 Description FRONT C OVER LCD22784 W/H LENS LED 2832 WRF LE NS IR 2100 5 H1: 6 H2: 5 17 LD 69 SCREW P C ZN YSB 3 x 6.5 SPEAKER 16 R 5 W 31x94 mm. ROHS SCREW P C ZN YFMB 3x9.5 17 TK 83S BUTTON STAND-BY 1709W BUT.FUN.1709W (KROM MET.KAPLAMA)
  • Page 30 TDM_GND0 SOFTWARE UPDATE C124 C12V DVB_IN_R R412 CN122 BACK AV/SIDE VE YPBPR F107 R159 C103 VCTI_PROG_EN VCTI_PROG_EN D140 600R TDM_PR TP117 C125 DVB_IN_G/Y SIDE_PR1 R413 220n HWSDA HWSCL JK102 C104 TDM_Y TP118 C126 DVB_IN_B/C R414 220n Q116 Q115 Q113 Q114 R132 BC848B BC848B...
  • Page 31 FLASH PROG. & VCTI DEBUG CN113 SD RGB INPUT FOR MST517 AUDIO LINE-OUT C193 S126 +3V3 100n +5V_VCTI R446 R268 S123 +3V3 C373 R388 C527 C178 C187 C528 Q128 ROUT2 100u 100n GND1 GND8 100n 100u S124 BC848B F148 F103 HWSDA C513 VSUP8.0AU...
  • Page 32 VDDP 3V3 SUPPLY FOR TSU 1V8 SUPPLY FOR TSU DIMMING pin58 pin77 pin84 pin96 pin120 pin139 pin160 pin172 pin182 F154 F158 C216 C220 C222 C227 C214 C225 C228 C230 C229 100n 100n 100n 100n 100n 100n 100n 100n 100n AVDD_33 AVDD_18 R440 R398...
  • Page 33 S221 Q193 C500 12V_STBY +12V_AUDIO_LIPS C255 NTGS3446 Q181 100n IRF7314 S220 S222 C377 5V_STBY U696 C428 C496 S218 100n 12V_STBY 12V_STBY 1V8_STBY R372 FS101 D119 D120 100n 1V8_STBY S219 12V_STBY 5V_STBY C369 +12V_AUDIO C134 MP1593 R255 R371 4A/24VDC 1N4001 1N4001 470u COMP R235...
  • Page 34 AUDIO MUTE SPDIF SWITCH AUDIO SWITCH TP182 R284 S174 GPIO_2 C265 SELECT IDTV_SPDIF 470R SDA_5V C264 C517 U711 R285 HEADPHONE AMPLIFIER MUTE +5V_SPDIF SPDIF_SW CAPACITANCE SCL2 470R SCL_5V S157 100n HP_PLUGGED NLAST4599 F160 100n R349 DVD_SPDIF ADDR Q146 C342 C343 R239 MUTEPORT BC848B...
  • Page 35 F117 +3V3_HDMI AVDD33 pin38 pin42 pin46 pin50 pin57 pin61 pin65 pin69 pin98 pin99 pin37 pin6 pin7 C439 C440 C441 +3V3 C361 C360 C302 C301 C300 C299 C298 C297 C296 C295 C294 C293 C292 C291 C290 S103 100n 100n 100n 100n 100n 100n 100n...
  • Page 36 HD RGB INPUT FOR TSU C605 R538 470R R560 F172 R559 F171 R558 PC/HDMI_SW PC/HDMI_SW HD_SW 600R 600R C627 C625 C623 TDM_PB SIDE_PB BAIN1 C586 100n 100n 100n R525 GAIN GIN0P GND1 GND1 GND1 SW_VS1 C652 HDMI_PB GND6 VGA_B GND6 BAIN2 GND6 VGA_VS...
  • Page 37 Fax: +46 (0) 8 562 711 13 Tel: +39 02 38073415 Servizio Clienti Email: csgswe@hitachi-eu.com Fax: +39 02 48786381/2 Email: customerservice.italy@hitachi-eu.com HITACHI EUROPE S.A.S HITACHI EUROPE LTD (Norway) AB Lyon Office STRANDVEIEN 18 B.P. 45, 69671 BRON CEDEX 1366 Lysaker FRANCE...

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