Hitachi 22LD4500UK Service Manual
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Hitachi 22LD4500UK Service Manual

Hitachi 22LD4500UK 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 châassis, 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
September 2004
No. 0205
22LD4500UK
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. 0205 22LD4500UK 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 INTRODUCTION ........................... 1 TUNER ............................. 1 IF PART (TDA988X) ........................1 MULTI STANDARD SOUND PROCESSOR ................1 AUDIO AMPLIFIER STAGE WITH AN7522 ................2 POWER ............................2 MICROCONTROLLER SDA55XX ..................... 2 7.1. General Features ..........................2 7.2. External Crystal and Programmable Clock Speed................
  • Page 3 11.11. TDA9885/86 ..........................14 11.11.1. General description ......................14 11.11.2. Features ..........................14 11.11.3. Pinning ..........................14 11.12. TDA1308 ........................... 15 11.12.1. General Description......................15 11.12.2. Features ..........................15 11.12.3. Pinning ..........................15 11.13. AN7522N ........................... 15 11.13.1. General description ......................15 11.13.2.

  • Page 4: Introduction

    1. INTRODUCTION 22” TFT-LCD TV is a Progressive TV control system based on the µ-controller SDA555X, with built-in de- interlacer and scaler. TFT TV is a progressive scan flicker free colour television with PC input, driving an WXGA (1280*720) panel with 16:9 aspect ratio. The chassis is capable of operation in PAL, SECAM, NTSC (playback) colour standards and multiple transmission standards as B/G, D/K, I/I’, and L/L´.

  • Page 5: Audio Amplifier Stage With An7522

    5. AUDIO AMPLIFIER STAGE WITH AN7522 The AN7522 is an audio class-AB amplifier assembled in SIL-12 Pin Plastic Package specially designed for sound cards application. Using this IC chassis operates as a stereo TV set. AN7522 has stand-by feature for low stand-by power consumption and mute feature for pop noise free opening and closing the TV set.

  • Page 6: Rom Characters

    7.6. ROM Characters • Shadowing • Contrast Reduction • Pixel by Pixel Shiftable Cursor With up to 4 Different Colours • Support of Progressive Scan and 100 Hz. • 3 X 4Bits RGB-DACs On-Chip • Free Programmable Pixel Clock from 10 MHz to 32MHz •...

  • Page 7: Ic Descriptions

    11. IC DESCRIPTIONS LM1117 TDA1308T LM2576 AN7522N LM317T PI5V330 TFMS5360 GM6015 ST24LC21 SAA3010T SST37VF040 AD9883A TEA5114A MC141585 TEA6415 MC34063 VPC3230D MSP3410G SDA55XX DS90C385 TDA9885/86 LM1084 11.1. LM1117 11.1.1. General Description The LM1117 is a series of low dropout voltage regulators with a dropout of 1.2V at 800mA of load current. It has the same pin-out as National Semiconductor’s industry standard LM317.

  • Page 8: Lm2576

    11.2. LM2576 11.2.1. General Description The LM2576 series of regulators are monolithic integrated circuits ideally suited for easy and convenient design of a step–down switching regulator (buck converter). All circuits of this series are capable of driving a 3.0 A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version.

  • Page 9: Lm317T

    11.3. LM317T 11.3.1. Description The LM317T is an adjustable 3 terminal positive voltage regulator capable of supplying in excess of 1.5 amps over an output range of 1.25 to 37 volts. This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage.

  • Page 10: St24Lc21

    11.5. ST24LC21 11.5.1. Description The ST24LC21 is a 1K bit electrically erasable programmable memory (EEPROM), organized by 8 bits. This device can operate in two modes: Transmit Only mode and I C bidirectional mode. When powered, the device is in Transmit Only mode with EEPROM data clocked out from the rising edge of the signal applied on VCLK.

  • Page 11: Sst37Vf040

    11.6. SST37VF040 11.6.1. Description The SST37VF512/010/020/040 devices are 64K x8 / 128Kx8 / 256K x8 / 512K x8 CMOS, Many-Time Programmable (MTP), low cost flash, manufactured with SST’s proprietary, high performance CMOS Super Flash technology. The split-gate cell design and thick oxide tunneling injector attain better reliability and manufacturability compared with alternate approaches.

  • Page 12: Tea5114A

    11.7. TEA5114A 11.7.1. General description This integrated circuit provides RGB switching allowing connections between peri TV plug, internal RGB generator and video processor in a TV set. The input signal black level is tied to the same reference voltage on each input in order to have no differential voltage when switching two RGB generators.

  • Page 13: Tea6415

    11.8. TEA6415 11.8.1. General description The main function of the IC is to switch 8 video input sources on 6 outputs. Each output can be switched on only one of each input. On each input an alignment of the lowest level of the signal is made (bottom of synch.

  • Page 14: Vpc3230D

    11.9. VPC3230D 11.9.1. General Description The VPC 323xD is a high-quality, single-chip video front-end, which is targeted for 4:3 and 16:9, 50/60-Hz and 100/120 Hz TV sets. It can be combined with other members of the DIGIT3000 IC family (such as DDP 331x) and/or it can be used with 3rd-party products.
  • Page 15 SUPPLYD Ground, LLC Circuitry Picture Bus Luma (MSB) Picture Bus Luma Picture Bus Luma Picture Bus Luma SUPPLYD Ground, Luma Output Circuitry SUPPLYD Supply Voltage, Luma Output Circuitry SUPY Picture Bus Luma Picture Bus Luma Picture Bus Luma Picture Bus Luma (LSB) Picture Bus Chroma (MSB) Picture Bus Chroma Picture Bus Chroma...

  • Page 16: Sda55Xx (Sda5550)

    11.10. SDA55XX (SDA5550) 11.10.1. General description The SDA55XX is a single chip teletext decoder for decoding World System Teletext data as well as Video Programming System (VPS), Program Delivery Control (PDC), and Wide Screen Signalling (WSS) data used for PAL plus transmissions (Line 23). The device also supports Closed caption acquisition and decoding.

  • Page 17: Tda9885/86

    11.11. TDA9885/86 11.11.1. General description The TDA9885 is an alignment-free single standard (without positive modulation) vision and sound IF signal PLL. The TDA9886 is an alignment-free multistandard (PAL, SECAM and NTSC) vision and sound IF signal PLL demodulator for positive and negative modulation including sound AM and FM processing. Both devices can be used for TV, VTR, PC and set-top box applications.

  • Page 18: Tda1308

    11.12. TDA1308 11.12.1. General Description The TDA1308 is an integrated class AB stereo headphone driver contained in an SO8 or a DIP8 plastic package. The device is fabricated in a 1 mm CMOS process and has been primarily developed for portable digital audio applications.

  • Page 19: Pi5V330

    11.14. PI5V330 11.14.1. General description Pericom Semiconductor’s PI5V series of mixed signal video circuits are produced in the Company’s advanced CMOS low-power technology, achieving industry leading performance. The PI5V330 is a true bidirectional Quad 2-channel multiplexer/demultiplexer that is recommended for both RGB and composite video switching applications.

  • Page 20: Gm6015

    11.15. GM6015 11.15.1. General description The Genesis Microchip 6015RD1 LCD TV reference board is a complete display processor for LCD, PDP and LCOS based televisions. The reference board demonstrates the processing capabilities of the Genesis Microchip gm6015 television controller IC. The gm6015 IC is a full-featured, dual-channel video processor with Genesis industry leading Crystal Ciema Plus video scan conversion.

  • Page 21: Saa3010T

    11.16. SAA3010T 11.16.1. Description The SAA3010 is intended as a general purpose (RC-5) infrared remote control system for use where a low voltage supply and a large debounce time are expected. The device can generate 2048 different commands and utilizes a keyboard with a single pole switch for each key. The commands are arranged so that 32 systems can be addressed, each system containing 64 different commands.

  • Page 22: Ad9883A

    11.17. AD9883A 11.17.1. General description The AD9883A is a complete 8-bit, 140 MSPS monolithic analog interface optimized for capturing RGB graphics signals from personal computers and workstations. Its 140 MSPS encode rate capability and full power analog bandwidth of 300 MHz supports resolutions up to SXGA (1280 1024 at 75 Hz).
  • Page 23 DATA OUTPUTS Data Output, RED Channel Data Output, GREEN Channel GREEN Data Output, BLUE Channel BLUE The main data outputs. Bit 7 is the MSB. The delay from pixel sampling time to output is fixed. When the sampling time is changed by adjusting the PHASE register, the output timing is shifted as well.
  • Page 24 pulses during the vertical interval. The COAST signal is generally not required for PC-generated signals. The logic sense of this pin is controlled by Coast Polarity (register 0FH, Bit 3). When not used, this pin may be grounded and Coast Polarity programmed to 1, or tied HIGH (to VD through a 10 k resistor) and Coast Polarity programmed to 0.

  • Page 25: Mc141585

    11.18. MC141585 11.18.1. General description This is a high performance HCMOS device designed to interface with a micro controller unit to allow colored symbols or characters to be displayed onto a LCD monitor. Because of the large number of fonts, 512 fonts including 496 standard fonts and 16 multi-color fonts, LMOSD2-16 is suitable to be adopted for the multi-language monitor application especially.
  • Page 26 NC (Pin 3) No connection. (Pin 4) This is the +5V power pin for the chip. HSYNC (Pin 5) This pin inputs a horizontal synchronize signal. It is negative polarity by default. The leading edge of HSYNC synchronizes its internal horizontal timing. The maximum input ratio between PIXin/HSYNC should not greater than 1580 for displaying 12X18 font matrix.

  • Page 27: Mc34063

    11.19. MC34063 11.19.1. Description The MC34063A Series is a monolithic control circuit containing the primary functions required for DC–to– DC converters. These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This series was specifically designed to be incorporated in Step–Down and Step–Up and Voltage–Inverting applications with a minimum number of external components.

  • Page 28: Msp34X0G

    11.20. MSP34X0G MSP3400G Multistandard Sound Processor Family 11.20.1. Introduction The MSP 34x0G family of single-chip Multistandard Sound Processors covers the sound processing of all analog TV-Standards worldwide, as well as the NICAM digital sound standards. The full TV sound processing, starting with analog sound IF signal-in, down to processed analog AF-out, is performed on a single chip.

  • Page 29: Pin Connections

    • 5-band graphic equalizer for loudspeaker channel • Spatial effect for loudspeaker channel • Four Stereo SCART (line) inputs, one Mono input; two Stereo SCART outputs • Complete SCART in/out switching matrix • Two I S inputs; one I S output •...

  • Page 30: Ds90C385

    SC3_IN_R SCART 3 input, right SC3_IN_L SCART 3 input, left ASG4 AHVSS Analog Shield Ground 4 SC4_IN_R SCART 4 input, right SC4_IN_L SCART 4 input, left LV or AHVSS Not connected AGNDC Analog reference voltage AHVSS Analog ground AHVSS Analog ground Not connected Not connected CAPL_M...

  • Page 31: Pin Descriptions

    • Up to 2.38 Gbps throughput • Up to 297.5 Megabytes/sec bandwidth • 345 mV (typ) swing LVDS devices for low EMI • PLL requires no external components • Compatible with TIA/EIA-644 LVDS standard • Low profile 56-lead or 48-lead TSSOP package •...
  • Page 32 TxIN0 PLL GND LVDS GND PLL GND LVDS GND PWR DOWN TxOUT2- R_FB TxOUT3- TxCLKIN LVDS GND TxIN0 TxIN1 TxIN3 TxIN2 TxIN3 TxIN4 TxOUT1- TxIN5 TxOUT2+ TxIN6 PLL GND TxIN7 PLL VCC TxIN8 TxCLKIN TxIN9 TxIN4 TxIN10 TxIN2 TxIN11 TxIN12 TxOUT1+ TxIN13 LVDS GND...

  • Page 33: Lm1084

    DS90C365 Pin Description — FPD Link Transmitter Pin name Description TxIN TTL level input. This includes: 6 Red, 6 Green, 6 Blue, and 3 control lines —FPLINE, FPFRAME and DRDY (also referred to as HSYNC, VSYNC, Data Enable). TxOUT+ Positive LVDS differentiaI data output. TxOUT- Negative LVDS differential data output.

  • Page 34: Service Menu Settings

    12. SERVICE MENU SETTINGS All system, geometry and white balance alignments are performed in production service mode. Before starting the production mode alignments, make sure that all manual adjustments are done correctly. To start production mode alignments enter the maIn menu by pressing “M” button and then press the digits 4, 7, 2 and 5 buttons respectively. The following menu appears on the screen.

  • Page 35: Options Menu Settings

    12.2. OPTIONS MENU SETTINGS In order to enter Options menu, move the cursor to Options… parameter by pressing “? /? ” buttons in Service Menu and press “? /? ” button. The following menu appears on the screen. Options... First APS A.P.S.
  • Page 36 Options... Equalizer L’ FM Prs Avl On 018: On/Off enable/disable I Standard. Set OFF On/Off enable/disable L Standard. Set OFF L’ On/Off enable/disable L’ Standard. Set OFF On/Off enable/disable M Standard. Set OFF On/Off enable/disable N Standard. Set OFF On/Off enable/disable NM Standard.
  • Page 37 Nicam Prs Avl On Adjusts the Nicam Prescaler value, when Automatic Volume Levelling is On Min. Value: 0000 00000 Max. Value: 00FF 00255 Recommended Value: 0022 00035: for 16 ohm Scart Prs Avl On Adjusts the Scart Prescaler value, when Automatic Volume Levelling is On Min.
  • Page 38 On/Off enable/disable Automatic Volume Levelling System. Set ON Top TXT On/Off enable/disable TopText. Set OFF Fast TXT On/Off enable/disable FastText. Set ON TXT Lang Switches between Teletext Language Groups Min. Value: 0000 00000 Max. Value: 0004 00004 Recommended Value: 0000 00000 IF Freq Adjusts the IF Frequency...

  • Page 39: Aps Wss Test Menu

    MENU On/Off enable/disable semi-transparent MENU. Set OFF. Not used. Adjusts the Automatic Gain Control value. Min. Value: 0000 00000 Max. Value: 001F 00031 Recommended Value: 000A 00010 Options... AV-3 MENU 050- 0012 00018 1.3. APS WSS TEST MENU In order to enter Aps Wss Test menu, move the cursor to Aps Wss Test parameter by pressing “? /? ” buttons in Service Menu and press “? /? ”...

  • Page 40: Block Diagram

    13. BLOCK DIAGRAM 3-17AMP07-POWER+AUDIO AMPL.BOARD AUDIO AMPLIFIER (2x3W) POWER REGULATORS (2.5V,3.3V,5V,8V,12V,14V,33V) MAIN L,R 1-17SC10-FRONT END BOARD 2-17MB10-SCALER BOARD ITU 656-8 bit MICROCONTROLLER TUNER SOFTWARE ROM IF PROCESSOR EEPROM VIDEO SWITCH Txt RGB,FB SCALER IC 2 X RGB SWITCH OSD IC VIDEO PROCESSOR Selected video 2M X 32 SDRAM...
  • Page 41 SVHS_Y SVHS_C PIP_CVBS_EXT YUV 4:2:2 8-bit SC2_C CVBS\Y Selected Video Output SC1_CVBS HS,VS 3.3V SC2_CVBS Y/CVBS 6415C CVBS BAV_CVBS CVBS_IF MONO_MAIN 4053 OPTIONAL AUDIO CVBS_PIP SC2_OUT_V MONO_PIP SWITCH AM_MONO RGB_SW VPC 3230D SC1_RGB, FB SC_RGB RGB, FB Video pro. PI5V330 TEA 5114 SC_FB1 SC1_L,R...
  • Page 42 2Mx32 SDRAM YUV 4:2:2 8-bit, HS,VS Port A 256K/512K YUV 4:2:2 8-bit RGB 3 X 1-bit OSD IC GM6015 3x8 bit LVDS Address, Data Bus MC141585 Selected Video Txt RGB,FB SDA5550 4:4:4RGB 24-bit Port B HS,VS Control Signals 8K/16K OPTIONAL EEPROM AD9883 Analog PC...
  • Page 43 SPEAKER MAIN L,R MUTE AN7522N ST-BY AUDIO AMPL. SPEAKER 3.3V 2.5V ST-BY REGULATORS POWER+AUDIO AMP. BOARD...

  • Page 44: Circuit Diagrams

    14. CIRCUIT DIAGRAMS Power Distribution Circuit 17AMP07-3...
  • Page 45 Audio Amplifier Circuit 17AMP07-3...
  • Page 46 Scaler IC Circuit 17MB10...
  • Page 47 Controller 17MB10...
  • Page 48 17MB10...
  • Page 49 Video Processor 17SC10-1...
  • Page 50 IF Processor 17SC10-1...
  • Page 51 Video Switching Circuit 17SC10-1...
  • Page 52 Audio Processor Circuit 17SC10-1...
  • Page 53 FRONT AUDIO/VIDEO CONNECTIONS 17FAV07-1...
  • Page 54 TACTILE SWITCH BOARD 17TK07P...
  • Page 55 17LD07-1...
  • Page 56 REMOTE CONTROL 11UK10-2...
  • Page 57 DESCRIPTION...
  • Page 58 17TK07P-PUSH SW - VS20138482 17AMP08-AMP. BOARD VS20156025 17FAV07- AV/HP/SVHS 17PING08 – IDTV Module VS20138184 VS30026752 17SC10A Tuner and Scart PCB 17MB10 – Main PCB VS20149950 VS20167610 22LD4500 17LD07 - LED Board VS20141950...
  • Page 59 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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