Service manual
Table Of Contents
- VIZIO L42HDTV10A,GV42L_HDTV Service Manual
- 01-FEATURES
- 02-SPECIFITION
- 03-ON SCREEN DISPLAY
- 04-FACTORY PRESET TIMINGS
- 05-PIN ASSIGNMENT
- 06-MAIN BOARD I/O CONNECTIONS
- 07-THEORY OF CIRCUIT OPERATION
- 08-WAVEFORMS
- 09-TROUBLE SHOOTING
- 10-BLOCK DIAGRAM
- 11-SPARE PATRS LIST
- 12-1COMPLETE PARTS LIST_FOR L42 HDTV10A
- 12-2COMPLETE PARTS LIST_FOR GV42L HDTV
- MAIN BOARD CIRCUIT DIAGRAM_FOR L42 HDTV10A
- MIAN BOARD CIRCUIT DIAGRAM_FOR GV42L HDTV
- MAIN BOARD PCB LAYOUT_FOR L42HDTV10A(LG/AUO)
- MAIN BOARD PCB LAYOUT_FOR GV42L HDTV_LG
- ASSEMBLY EXPLOSION DRAWING_FOR L42HDTV10A_AUO
- ASSEMBLY EXPLOSION DRAWING_FOR L42HDTV10A_LG
- ASSEMBLY EXPLOSION DRAWING_FOR GV42L HDTV_LG
CONFIDENTIAL – DO NOT COPY
Page 7-31
File No. SG-0198
3. Mode selection
In the L32 LCD TV TDA8946AJ has two functional modes, which can be selected by applying the
proper DC voltage to pin MODE.
1. Mute — In this mode the amplifier is DC-biased but not operational (no audio output).
This allows the input coupling capacitors to be charged to avoid pop-noise. The device is in mute
mode when 3.5 V < VMODE < (VCC − 1.5 V).
2. Operating — In this mode the amplifier is operating normally. The operating mode is activated at
VMODE<1.0V.
MT5351 Application :
MediaTek MT5351 is a DTV Backend Decoder SOC which support flexible transport demux , HD
MPEG-2 video decoder , JPEG decoder , MPEG1,2,MP3,AC3 audio decoder , HDTV encoder . The
MT5351 enables consumer electronics manufactures to build high quality , feature-rich DTV , STB or
other home entertainment audio/video device.World-Leading Technology : HW support worldwide
major broadcast network and CA standards , include ATSC , DVB , OpenCable , DirectTV ,
MHP.Rich Feature for high value product : To enrich the feature of DTV , the MT5351 support
1394-5C component to external DVHS . Dual display , PIP/POP and quad pictures provide user a
whole new viewing experience.Credible Audio/Video Quality : The MT5351 use advanced
motion-adaptive de-interlace algorithm to achieve the best movie/video playback , The embedded
4X over-sample video DAC could generate very fine display quality . Also , the audio 3D surround
and equalizer provide professional entertainment.