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Haier L42A9-AK Service Manual
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Haier L42A9-AK Service Manual

Haier L42A9-AK Service Manual

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Summary of Contents for Haier L42A9-AK

  • Page 1 L42A9-AK...

  • Page 3: Safety Precautions

    2. Safety precautions WARNING RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE. REFER TO QUALIFIED SERVICE PERSONNEL. *To avoid electric hazards, it is strongly suggested that the back cover not be opened, as there is no any accessory inside the casing.
  • Page 4 The product should be tightly fixed to avoid To avoid fire hazards, do not use this drop damages and even fire. product under direct sunlight or closely to heat sources. Unplug the power supply and antenna of Do not locate the product close to water the product when there is a rainstorm, or oil, which may cause fire hazards.

  • Page 5: Images Of Module And Circuit Boards

    3. Images of Module and Circuit Boards 2. Images of tuner board subassembly...
  • Page 6 3. Images of USB board subassembly...
  • Page 7 4. Key IC Description& Trouble Shooting Guide A: MAIN CHIP SUMMARY U11 M30620: 16-BIT CMOS SINGLE-CHIP MICROCOMPUTER The single-chip microcomputer operate using sophisticated instructions featuring a high level of instruction efficiency. With 1M bytes of address space, they are capable of executing instructions at high speed. In addition, this microcomputer contains a multiplier and DMAC which combined with fast instruction processing capability.

  • Page 8: Picture Display

    U8 SAA7117: The SAA7117(A)E/H is a consequent derivate of SAA7118 X-VIP multistandard video decoder. In addition to its predecessor, it provides 10 bit A/D- conversion, enhanced PAL/NTSC comb filtering, more versatile VBI data processing,support of High Definition component video, picture improvement processing, and more robustness with VCR-type signals.

  • Page 9: Troubleshooting

    Troubleshooting For the sake of time and cost, it is strongly recommended that you check out the problem by yourself according to the instructions listed hereunder before contacting the after-sales service for technical assistance. Problem Possible remedies Turn on the power supply; No picture, Properly plug the TV set to the power socket;...

  • Page 11: Bus Control Adjustment

    6. BUS Control Adjustment To enter factory menu you can follow the steps: 1. Press V- to minish the voice value to 0. 2. Press “menu” on the TVset,you will see the list on the screen. 3.Press “menu”on the remote control, the list on the screen will disappear. 4.Press three seconds,then you will enter the factory menu FactoryMenu...
  • Page 12 Favorite On/Off FlyProg On/Off Lock On/Off SaveMode On/Off On/Off On/Off Sync On/Off Video (work on with “MPPIP” and “MPSource” in the setting menu) Video Bright value{0-100} def 85 Contrast Bright value{0-100} def 90 Bright Bright Saturation Bright value{0-100} def 90 value{0-100} def 0 Hue Bright Sharp Bright...
  • Page 13 Tv Satu Min value {0-127} def 0(Tv) value {0-100} def 50 BackLight Max BackLight Min value {0-100} def 0 Pc MaxMin value {0-255} def 90 Pc Contrast Max Pc Contrast Min value {0-255} def 0 value {0-255} def 95 Pc Bright Max value {0-255} def 0 Pc Bright Min Hd Pc SatuMax...
  • Page 14 Audio Set 2 value{Linear,Logarith} def Linear BalanceMode Spatial Effect High-Pass Gain AvcDecaytime Value {Auto,Max,2/3,1/3,Min} Def Auto SurroundMode HighResolution ClippingMode work when TralWoofer is open Woofer Prescale work when TralWoofer is open Woofer Mode Audio Set 3 value (0-127) def 50 Vol 10 value (0-127) def 80...
  • Page 15 Setting MPPIP Only MP works MP Source DV_TV,DV_AV,DV_SAV,Ts_HDTV,Ts_PC,DVI Marching to the value of Video Mode onTV,AV,SAV,HDTV,PC,DVI,such as Video Bright, Video Stand, Video Soft PIP Source no work Factory on/off of the factory systerm IIC upgrading on-line BusOff EepReset Eeprom initializes Note: When you leave the “FactoryMenu”,please make sure that the Factory item is off.

  • Page 16: Circuit Diagram

    7 Circuit diagram...
  • Page 21 AGND AGND...
  • Page 24 AGND AGND AGND...