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32LD8D20E Dataheets PDF



Part Number 32LD8D20E
Manufacturers Hitachi
Logo Hitachi
Description TFT LCD TV SERVICE MANUAL
Datasheet 32LD8D20E Datasheet32LD8D20E Datasheet (PDF)

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. 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 z.

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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. 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. No. 0243 32LD8D20E 32LD8D20EA 32LD8D20U 32LD8D20UA 32LD8D20UC 37LD8D20E 37LD8D20U 37LD8D20UA 37LD8D20UC 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 enthaltenen Spezifikationen können sich zwecks Verbesserungen ändern. Contents 1. Introduction 11. Service Menu Settings 2. Tuner 12. Block Diagrams 3. Audio Amplifier Stage 13. Troubleshooting Guide 4. Power Stage 14. Connectors 5. Microcontroller (VCTP) 15. Concept ICs 6. DRX 3961A 16. Replacement Parts 7. Serial 64K I2C EEPROM 17. Assembly Drawing 8. Class AB Stereo Headphone 18. Schematic Diagrams Driver 19. PCB Layout Diagrams 9. SAW Filter X6966M 10. IC Descriptions SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT Colour Television December 2007 1. INTRODUCTION 17MB22 Main Board consists of Micronas concept , VCTP as controller. This IC is capable of handling Audio processing, video processing, motion adaptive up conversion(MAU), Scaling-Display processing and FPD control (DPS), unified memory for audio video and Text, 3D comb filter, PC connectivity, OSD and text processing. TV supports PAL, SECAM, NTSC colour standards and multiple transmission standards as B/ G, D/K, I/I’ and L/L’ including German and NICAM stereo. Sound system output is supplying 2x 8W (10%THD) for stereo 8Ω speakers Supported peripherals are: 1 RF input VHF1, VHF3, UHF @ 75Ohm 1 FAV input 2 SCART sockets 1 SVHS input 1 Stereo Headphone input 1 YPbPr 1 PC input 1 HDMI input 1 Stereo audio input for PC 2. TUNER As the thickness of the TV set has a limit, a horizontal mounted tuner is used in the product, which is suitable for CCIR systems B/G, H, L/ L’, I/I’ and D/ K. The tuning is available through the digitally controlled I2C bus (PLL). Below you will find info on the Tuner in use. 2.1 General description of UV1316 The UV1316 tuner belongs to the UV 1300 family of tuners, which are designed to meet a wide range of applications. It is a combined VHF, UHF tuner suitable for CCIR systems B/G, H, L, L’, I and I’. The low IF output impedance has been designed for direct drive of a wide variety of SAW filters with sufficient suppression of triple transient. 2.2 Brief description The DTT 713XX is designed for digital terrestrial reception in VHFIII and UHF, compliant with the European digital terrestrial standard ETS 300744. In addition it covers all channels from 44.25MHz to 863.25MHz. It is a two band concept, VHF and UHF, with VHF switched between VHF low (VHFI) and VHF high (VHFIII). Optional an antenna loop through function, a combiner to feed through an RF-modulator signal to the TV output, a buffered 4MHz crystal oscillator output, a DC/DC converter to generate 32V tuning voltage can be provided. Instead of RF modulator input, an antenna power supply input is possible. The DTT 713XX has the possibility to activate an internal wide band RF AGC. Tuning, band switching and internal RF AGC is controlled via I2C bus. The metal housing is in world standard tuner size. The module complies with the requirements of radiation, signal handling capability and immunity interference of CENELEC standards EN 55013 and EN 55020. 3. AUDIO AMPLIFIER STAGE WITH MP7722 3.1 General Description The MP7722 is a stereo 20W Class D Audio amplifier, intended for use as low frequency power amplifier in a wide range of applications in radio and TV sets. It uses a minimum number of external components to complete a stereo Class D audio amplifier. 3.2 Features x 2 x 20W Output at VDD = 24V into a 4Ÿ load x THD+N = 0.06% at 1W, 8Ÿ x 93% Efficiency at 20W x Low Noise (190μV Typical) x Switching Frequency Up to 1MHz x 9.5V to 24V Operation from a Single Supply x Integrated Startup and Shutdown Pop Elimination Circuit x Thermal and Short Circuit Protection x Integrated 180mŸ Switches x Mute/Standby Modes (Sleep) x Thermally Enhanced 20-Pin TSSOP Package with Exposed Pad 3.3 Applications x Surround Sound DVD Systems x Televisions x Flat Panel Monitors x Multimedia Computers x Home Stereo Systems 3.4 Absolute Ratings 3.5 Pinning 4. 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. The main power supply unit is designed for 24V and 12V D.


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