Download
Share
Print this page
THOMSON L40M71A2 Service Manual
  1. Manuals
  2. Brands
  3. THOMSON Manuals
  4. LCD TV
  5. L40M71A2
  6. Service manual
THOMSON L40M71A2 Service Manual

THOMSON L40M71A2 Service Manual

Hide thumbs

Advertisement

Quick Links

Download this manual
Service Manual
1. Caution··························································································2
2. Specifications of chassis·································································6
3. Alignment Procedure······································································13
4. Circuit Description·········································································20
5. Schematic Diagram········································································34
6. PCB Layout···················································································53
7. Explode View·················································································55
8. BOM List·······················································································56
This manual is the latest at the time of printing, and does not
include the modification which may be made after the printing, by
the constant improvement of product.
Thomson
L40M71A2

Advertisement

loading
Need help?

Need help?

Do you have a question about the L40M71A2 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for THOMSON L40M71A2

Summary of Contents for THOMSON L40M71A2

  • Page 1: Table Of Contents

    Thomson Service Manual L40M71A2 1. Caution··························································································2 2. Specifications of chassis·································································6 3. Alignment Procedure······································································13 4. Circuit Description·········································································20 5. Schematic Diagram········································································34 6. PCB Layout···················································································53 7. Explode View·················································································55 8. BOM List·······················································································56 This manual is the latest at the time of printing, and does not include the modification which may be made after the printing, by the constant improvement of product.

  • Page 2: Caution

    CAUTION: Use of controls, adjustments or procedures other than those specified herein may result in hazardous radiation exposure. CA UTION: TO REDUCE THE RISK OF CAUTION ELECTRICAL SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE RISK OF ELECTRIC PARTS INSIDE.
  • Page 3 IMPORTANT SAFETY INSTRUCTIONS CAUTION: Read all of these instructions. Save these instructions for later use. Follow all Warnings and Instructions marked on the audio equipment. 1. Read Instructions- All the safety and operating instructions should be read before the product is operated. 2.
  • Page 4 PROTECTION AND LOCATION OF YOUR SET Do not use this television set near water ... for example, near a bathtub, washbowl, kitchen sink, or laundry tub, in a wet basement, or near a swimming pool, etc. Never expose the set to rain or water. If the set has been exposed to rain or water, unplug the set from the wall outlet and refer servicing to qualified service personnel.
  • Page 5 OPERATION OF YOUR SET 18. This television set should be operated only from the type of power source indicated on the marking label.If you are not sure of the type of power supply at your home, consult your television dealer or local power company. For television sets designed to operate from battery power, refer to the operating instructions.

  • Page 6: Specifications Of Chassis

    Items description L40M61A2 L40M71A2 Model Remote Control Picture RC TYPE Basic Info. Panel Size inch 40" 40" Panel Supplier SAMSUNG SAMSUNG Aspect Ratio 16:9 16:9 Chassis Name MT02 MT02 solution MT8202AG MT8293E YDA138-E MT8202AG MT8293E YDA138-E Market Certification CB/EMC CB/EMC...
  • Page 7 Power Consumption - Standby Less than 1W Less than 1W LED indication - Power ON LED indication - STANDBY AC Switch Yes (Back) Yes (Back) Standby to Power ON By RC or CH+/- button By RC or CH+/- button System Tuning - Max Programs Auto search,manual search and fine Auto search,manual search and fine...
  • Page 8 HDTV Input - DVI HDTV Input - HDMI (up to 720p,1080i)@50Hz/60Hz; (up to 720p,1080i)@50Hz/60Hz; Build-in Data System Teletext Standard English, French, German, Italian, English, French, German, Italian, Spanish Teletext Language Spanish, Finnish,Dutch Finnish,Dutch Teletext Pages 1000 1000 Teletext Features Navigation line, Page+/-,Index Navigation line, Page+/-,Index CCD(Closed Caption) V-chip...
  • Page 9 Standby,CH+,CH-,Vol+,Vol-,Menu Standby,CH+,CH-,Vol+,Vol-,Menu Keyboard Control (Side on the panel) Remote Control Menu,Source,etc. Menu,Source,etc. Other Functions Game Screen Saver Demo Functions Favourite Channels Picture Freeze Please add other items referring to factual situation Connectors Side AV Input - CVBS (RCA) Audio Input - R/L (RCA) Audio Input - Mono (RCA) S-video Audio Input - R/L (RCA)
  • Page 10 S/W Updating Socket RF - Terr.Antenna in(Type) 75ohm(IEC) 75ohm(IEC) ITV Smart Port I-Link(1394) Capacity IR Blaster Jack Other Function Extended Interfaces Power In Cinch AC 110-240V,50/60Hz AC 110-240V,50/60Hz Connectors Front AV Input - CVBS (RCA) Audio Input - R/L (RCA) Audio Input - Mono (RCA) Headphone Out - R/L ( 3.5mm) USB Connector...
  • Page 11 Features Packaging Method Dimension - packaged (L*H*D) Dimension - unpackaged (L*H*D) Net Weight and Gross Weight Multi-function Box Packaging Method Dimension - unpackaged (L*H*D) Dimension - packaged (L*H*D) Net Weight and Gross Weight Base Stand Features Plastic Plastic Packaging Method Dimension - packaged (L*H*D) Dimension - unpackaged (L*H*D) Net Weight and Gross Weight...
  • Page 12 Power Cord DVI Cable VGA Cable HDMI Cable Control/Signal Cable (Panel to MFB) AV Cable Component Video Cable Audio Cable Please add other items referring to factual situation...

  • Page 13: Alignment Procedure

    3 ALIGNMENT PROCEDURE 3.1 Product Overview Chassis MT02 is using the MT82xx series as the main chip embedded the MCU, Scaler, RAM, Video decoder and Audio processor. The circuit outside and alignment is very simple. The power consume is 180W Max. , the standby consume less than 1W. The Sound speaker’s power is 2x5W.The PSU has 3 part voltage output: one 5v for standby, one 24v for inverter, one 12v for signal process.
  • Page 14 Factory Menu 3.3.2 Enter the Field Service mode Use the IR and press the remote key “Vol-” to “0”, press mute remote key, then press 9,7,3,5 remote key. Press right key to enter the sub-menu and press MENU key to return the main-menu.
  • Page 15 Source It is the source of white balance adjusts that is SCART, CMP, HDMI, and VGA. White R/G/B It is used for the adjustment of white balance. Gray R/G/B It is used for the adjustment of gray balance. RGB Calibrate It is used for the software adjustment in VGA mode.
  • Page 16 Factory *********** MT: V*** System Blue Mute ON Switch of “BLUE” screen Balance CTI Middle Default. No need Adjusting. TV Geo Flash Tone ON Default. Must be “OFF” when adjusting white balance. Nicam Adaptive Luma Control ON Default. Must be “OFF” when adjusting white balance.
  • Page 17 Factory *********** MT: V*** System High DEVI Balance AM Mute TV Geo AM Mute high Nicam AM Mute low Mono Carrier shift Sound Saturation Mute Other FM Mute Info FM Mute High FM Mute Low Factory Alignment Process 3.3.3 Adjust the ADC channel of signal source Set “OFF”...
  • Page 18 iii. White balance and color temperature adjusting on CMP state. On CMP state, go into “balance” of service menu. Input 576i/50Hz 8-class gray signal, test color coordinate with a color analyzer A. On the 3 gray of the bright side. Then adjust White R and White G and White B until the data on the analyzer become x=282 10, y=293 10, also bright value 220 nit.
  • Page 19 After update finished, power off the TV, then power on, at the first time that you power on the TV set, the display will be later than normal. Update through the VGA port. Connect by the cable (the tool and the cable) between the PC and the VGA port. Power on the set, press the key of the factory remote control.

  • Page 20: Circuit Description

    4 MT02 CIRCUIT DESCRIPTION 1 OVERALL DESCRIPTION: Chassis MT02 is using the MT82xx series as the main chip embedded the MCU, scaler, video decoder and audio processor. The circuit outside and alignment is very simple. The decoder IC MT8202 is made by MTK which is the company in Taiwan.MT8202 is a highly integrated single chip for LCD TV, it includes 3D comb fliter TV decoder to retrieve the best image from the popular composite signals.
  • Page 21 According to the main board edition E 4 KEY COMPONENTS LIST Serial no. Part no. Name of IC function 13-MT8202-AGB LCDMT8202AG CPU\video decoder\scaler\nicam decoder U4/U5 13-281622-ETB5 HY5DU281622ET-5 DDR SDRAM 13-AL016M-90B FLASH S29AL016M90TFI02 13-M24C32-MNB M24C32-WMN6(S08) System EEPROM...
  • Page 22 13-SC2602-S0B SC2602 DC-DC 13-D13N03-LIB OHKD13N03LT Dual mos 13-SO2996- SP2996BEN-L/TR DDR termination BEBNL 13-CM2021-00B CM2021-00TR HDMI ESD 13-MT8293-E0B HDMI PANELLINK HDMI Decoder CINEMA RECEIVER MT8293E 13-AT24C0-2BB 2K AT24C02BN-10SU- HDMI EEPROM 13-00M24C-08B 8K M24C08 HDMI HDCP EEPROM 13-AT24C0-2BB 2K AT24C02BN-10SU- VGA DDC EEPROM U2(SCART BOARD) 13-HC4052- 74HC4052PW...
  • Page 23 5.2 U4/U5 The Hynix HY5DU281622ET air a 134,217,728-bit CMOS Double Data Rate(DDR) Synchronous DRAM,ideally suited for the main memory applications which requires large memory density and high bandwidth. The Hynix 128Mb DDR SDRAMs offer fully synchronous operations referenced to both rising and falling edges of the clock.While all addresses and control inputs are latched on the rising edges of the CK(falling edges of the /CK),Data,Data strobes and Write date masks inputs are sampled on both rising and falling edges of it.The data paths are intermally pipelined and 2-bit...
  • Page 24 5.3 U7 The S29AL016M is a 16Mbit,3.0 volt-only flash memory organized as 2,097,152 bytes or 1,048,576 words.
  • Page 25 5.4 U27 The SC2602 are low-cost,full featured,synchronous voltage-mode controllers designed for use in single ended power supply applications where efficiency is of primary concern,Synchronous operation allows for the elimination of heat sinks in many applications.The SC2602s are ideal for implementing DC/DC converters needed to power advanced microprocessors in low cost systems,or in distributed power applications where efficiency is important.Internal level- shift,high-side drive circuitry,and preset shoot-thru control,allows the use of inexpensive N- channel power switches.
  • Page 26 Typical Applications Circuit 5.5 U6 The SP2996B voltage regulator is designed to convert voltage supplies ranging from 1.6v to 6v into a desired output voltage which is adjusted by an external resistor divider. The regulator is capable of sourcing or sinking up to 2A of Continuous current while regulating an output voltage to within 20mv.
  • Page 27 Typical Appliacations Circuit 5.6 U36 The CM2021 is a HDMI receiver port protection and interface device. Electrical Schematic...
  • Page 28 5.7 U8 MT8293 is a low-cost,fully HDMI-compliant receiver that fits directly into home theater products such as LCD TVs,plasma TVs and HDTVs.The receiver is capable of supporting bandwidths up to 165MHz and video resolutions up to 1080p and UXGA.The MT8293 supports the DVD-Audio standard,including 7.1-surround audio at 96kHz and stereo audio at 192kHz.
  • Page 29 5.8 U12 The CS5340 is a complete analog-to-digital converter for digital audio systems.It performs sampling,analog-to-digital conversion,and anti-alias filtering,generating 24-bit values for both left and right inputs in serial form at sample rates up to 200kHz per channel. The CS5340 uses a 5 -order,multi-bit Delta-Sigma modulator followed by digital filtering and decimation,which removes the need for an external anti-alias filter.
  • Page 30 5.9 U15 The CS4334 family members are complete,stereo digital-to-analog output systems including interpolation,1-bit D/A conversion and output analog filtering in an 8-pin package. The CS4334 support all major audio data interface formats,and the individual devices differ only in the supported interface format. The CS4334 family is based on delta-sigma modulation,where the modulator output controls the reference voltage input to an ultra-linear analog low-pass filter.This architecture allows for infinite adjustment of sample rate between 2 kHz and 100 kHz simply by changing the master...
  • Page 31 5.10 U17/U18 The RC4558 is dual general-purpose operational amplifiers with each half electrically similar to the uA741 except that offset null capability is not provided. Block Diagram (each amplifier) 5.11 U16 YDA138 is a high efficient digital audio power amplifier IC that operates with a single 12V power supply.
  • Page 32 as power-down function and output mute function. Typical Applications Circuit 5.12 U14 Pericom Semiconductor’s PI5V330 true bidirectional Quad 2-channel multiplexer/demultiplexer recommended for both RGB and composite video switching applications.The video switch can be driven from a current output RAMDAC or voltage output composite video source.
  • Page 33 Block Diagram...
  • Page 50 CE10 CE11 CE12...

  • Page 56: Bom List

    8.BOM LIST...

This manual is also suitable for:

L42m61s2L42e62s2L42m71s2