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Vizio VX42L HDTV10A Service Manual

Vizio 42" lcd hdtv service manual
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Service Manual

Model #: VIZIO VX42L HDTV10A /
VW42L HDTV10A
V, Inc
320A Kalmus Drive Costa Mesa, CA 92626
TEL : +714-668-0588 FAX :+714-668-9099
Top Confidential

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  • Page 1: Service Manual

    Service Manual Model #: VIZIO VX42L HDTV10A / VW42L HDTV10A V, Inc 320A Kalmus Drive Costa Mesa, CA 92626 TEL : +714-668-0588 FAX :+714-668-9099 Top Confidential...
  • Page 2: Table Of Contents

    8. Waveforms 9. Trouble Shooting 10. Block Diagram 10-1 11. Spare parts list 11-1 12. Complete Parts List 12-1 Appendix 1. Main Board Circuit Diagram 2. Main Board PCB Layout 3. Assembly Explosion Drawing Block Diagram VIZIO VX42L/VW42L HDTV10A Service Manual...
  • Page 3 Use a power cable that is properly grounded. Always use the AC cords as follows – USA (UL); Canada (CSA); Germany (VDE); Switzerland (SEV); Britain (BASEC/BS); Japan (Electric Appliance Control Act); or an AC cord that meets the local safety standards. VIZIO VX42L/VW42L HDTV10A Service Manual...
  • Page 4: Features

    Chapter 1 Features 1. Built in TV channel selector for TV viewing 2. Simulatnueous display of PC and TV images 3. Connectable to PC’s analog RGB port 4. Built in S-video, HDTV, composite video, HDMI and TV out 5. Built in auto adjust function for automatic adjument of screen display 6.
  • Page 5: Specifications

    Chapter 2 Specification 1. LCD CHARACTERISTICS Type: 42.0 WXGA TFT LCD Size: 42.02inch Display Size: 42.02 inches (1067.308mm) diagonal Outline Dimension: 983 mm (H) x 576 mm (V) x 51 mm (D) (Typ.) Pixel Pitch: 0.227mm x 0.681mm x RGB Pixel Format: 1366 horiz.
  • Page 6 6.Speaker Output 10W (max) X2 7. ENVIRONMENT 7-1. Operating Temperature: 5c~35c (Ambient) 7-2. Operating Humidity: Ta= 35 °C, 90%RH (Non-condensing) 7-3. Operating Altitude: 0 - 14,000 feet (4267.2m)(Non-Operating) 8. DIMENSIONS (Physical dimension) Width: 1028 mm. Depth: 99.0mm Height: 694.0mm 9. WEIGHT (Physical weight) a.
  • Page 7 (6) Do not touch, push or rub the exposed polarizes with glass, tweezers or anything harder than HB pencil lead. And please do not rub with dust clothes with chemical treatment. Do not touch the surface of polarizer for bare hand or greasy cloth.(Some cosmetics are detrimental to the polarizer.) (7) When the surface becomes dusty, please wipe gently with absorbent cotton or other soft materials like chamois soaks with petroleum benzene.
  • Page 8 9-3. HANDLING PRECAUTIONS FOR PROTECTION (1) The protection film is attached to the bezel with a small masking tape. When the protection film is peeled off, static electricity is generated between the film and polarizer. This should be peeled off slowly and carefully by people who are electrically grounded and with well ion-blown equipment or in such a condition, etc.
  • Page 9: On Screen Display

    Chapter 3 On Screen Display On Screen Display (OSD) is a friendly interface providing the function adjusting in our system. Customers could operate it only by few buttons. There is the introduction of the OSD. Main unit button MENU CH ▲ ↑...
  • Page 10 A. Picture:(Bold: Default) a. Picture Mode (Standard/Movie /Game / Custom) b. Backlight (0~100, 90) c. Contrast (0~100, 50) d. Brightness (0~100, 50) e. Color (saturation)(0~100, 50) f. Tint (hue) (-32~32, 0) g. Sharpness (0~7, 4) h. Color Temperature (Cool/Normal/Warm/Custom) B. Audio:(Bold: Default) a.
  • Page 11 C. TV:(Bold: Default) a. Tuner Mode (Cable/Air) b. Auto Search c. Skip Channel d. Digital Audio Out (PCM/Dolby Digital/OFF) e. Time Zone (Eastern/Indiana/Central/Mountain/Arizona/Pacific/Alaska/Hawaii) CONFIDENTIAL – DO NOT COPY Page 3-3 File No. SG-0211...
  • Page 12 D. Setup:(Bold: Default) a. Language (English/ Français / Espaňol) b. Sleep Timer (OFF/30Min/60Min/90Min/120Min) c. Analog CC (OFF/CC1~4/TT1~4) d. Digital CC (OFF/CC1~4/Service1~6) e. Digital CC Style 1. Caption Style (As Broadcaster/Custom) 2. Size (Large/Small/Medium) 3. Font Color (White/Green/Blue/Red/Cyan/Yellow/Magenta/Black) 4. Font Opacity (Solid/Translucent/Transparent) 5.
  • Page 13 E. Parental:(Bold: Default) Password (Default => 0000) a. Cannel Block b. TV Rating c. Move Rating d. Block Unrated TV (NO/Yes) e. Access Code Edit CONFIDENTIAL – DO NOT COPY Page 3-5 File No. SG-0211...
  • Page 14 RGB Mode A. Picture Adjust:(Bold: Default) a. Auto Adjust b. Backlight (0~100, 90) c. Contrast (0~100, 50) d. Brightness (0~100, 50) e. Color Temperature (6500/9300/Custom) f. H-Size (0~255, 127) g. H-Position (0~100, 65) h. V-Position (0~100, 49) i. Fine Tune (0~31, 17) CONFIDENTIAL –...
  • Page 15 B. Audio:(Bold: Default) a. Volume (0~100, 25) b. Bass (0~100, 50) c. Treble (0~100, 50) d. Balance (-50~50, 0) e. Surround (ON/OFF) f. Speakers (ON/OFF) CONFIDENTIAL – DO NOT COPY Page 3-7 File No. SG-0211...
  • Page 16 D. Setup:(Bold: Default) a. Language (English/ Français / Espaňol) b. Sleep Timer (OFF/30Min/60Min/90Min/120Min) c. Analog CC (OFF/CC1~4/TT1~4) d. Digital CC (OFF/CC1~4/Service1~6) e. Digital CC Style 1. Caption Style (As Broadcaster/Custom) 2. Size (Large/Small/Medium) 3. Font Color (White/Green/Blue/Red/Cyan/Yellow/Magenta/Black) 4. Font Opacity (Solid/Translucent/Transparent) 5.
  • Page 17 AV / COMPONENT MODE A. Picture:(Bold: Default) a. Picture Mode (Standard/Movie /Game / Custom) b. Backlight (0~100, 90) c. Contrast (0~100, 50) d. Brightness (0~100, 50) e. Color (saturation)(0~100, 50) f. Tint (hue) (-32~32, 0) g. Sharpness (0~7, 4) h. Color Temperature (Cool/Normal/Warm/Custom) CONFIDENTIAL –...
  • Page 18 B. Audio:(Bold: Default) a. Volume (0~100, 25) b. Bass (0~100, 50) c. Treble (0~100, 50) d. Balance (-50~50, 0) e. Surround (ON/OFF) f. Speakers (ON/OFF) CONFIDENTIAL – DO NOT COPY Page 3-10 File No. SG-0211...
  • Page 19 C. Setup:(Bold: Default) a. Language (English/ Français / Espaňol) b. Sleep Timer (OFF/30Min/60Min/90Min/120Min) c. Analog CC (OFF/CC1~4/TT1~4) d. Digital CC (OFF/CC1~4/Service1~6) e. Digital CC Style 1. Caption Style (As Broadcaster/Custom) 2. Size (Large/Small/Medium) 3. Font Color (White/Green/Blue/Red/Cyan/Yellow/Magenta/Black) 4. Font Opacity (Solid/Translucent/Transparent) 5.
  • Page 20 D. Parental:(Bold: Default) Password (Default => 0000) a. Cannel Block b. TV Rating c. Move Rating d. Block Unrated TV (NO/Yes) e. Access Code Edit CONFIDENTIAL – DO NOT COPY Page 3-12 File No. SG-0211...
  • Page 21: Hdmi Mode

    HDMI MODE A. Picture:(Bold: Default) a. Picture Mode (Standard/Movie /Game / Custom) b. Backlight (0~100, 90) c. Contrast (0~100, 50) d. Brightness (0~100, 50) e. Color (saturation)(0~100, 50) f. Tint (hue) (-32~32, 0) g. Sharpness (0~7, 4) h. Color Temperature (Cool/Normal/Warm/Custom) CONFIDENTIAL –...
  • Page 22 B. Audio:(Bold: Default) a. Volume (0~100, 25) b. Bass (0~100, 50) c. Treble (0~100, 50) d. Balance (-50~50, 0) e. Surround (ON/OFF) f. Speakers (ON/OFF) CONFIDENTIAL – DO NOT COPY Page 3-14 File No. SG-0211...
  • Page 23 C. Setup:(Bold: Default) a. Language (English/ Français / Espaňol) b. Sleep Timer (OFF/30Min/60Min/90Min/120Min) c. Analog CC (OFF/CC1~4/TT1~4) d. Digital CC (OFF/CC1~4/Service1~6) e. Digital CC Style g. Rest All Setting (OK/Cancel) CONFIDENTIAL – DO NOT COPY Page 3-15 File No. SG-0211...
  • Page 24 [INPUT] “INPUT” could supply an interface providing a list. The list shows input sources and provides the choices of different sources. The list includes items as below: A. TV: Analog TV or digital TV B. AV1, AV2: Composite (AV) signal C.
  • Page 25: Factory Preset Timings

    Chapter4 Factory preset timings This timing chart is already preset for the TFT LCD analog & digital display monitors. Refresh Horizontal Vertical Horizontal Vertical Pixel Resolution rate Frequency Frequency Polarity Polarity Rate 640x480 60Hz 31.5kHz 59.94Hz 25.175 640x480 75Hz 37.5kHz 75.00Hz 31.500 800X600...
  • Page 26: Pin Assignment

    Chapter5 Pin Assignment The TFT LCD analog display monitors use a 15 Pin Mini D-Sub connector as video input source. Description Green Blue Ground Ground R-Ground G-Ground B-Ground +5V for DDC Ground No Connection (SDA) H-Sync (Composite Sync) V-Sync (SCL) CONFIDENTIAL –...
  • Page 27 HDMI CONNECT PIN ASSIGNMENT SIGNAL ASSIGNMENT TMDS Data2+ TMDS Data2 Shield TMDS Data2- TMDS Data1+ TMDS Data1 Shield TMDS Data1- TMDS Data0+ TMDS Data0 Shield TMDS Data0- TMDS Clock+ TMDS Clock Shield TMDS Clock- Reserved (N.C on device) DDC/CEC Ground +5V Power Hot Plug Detect CONFIDENTIAL –...
  • Page 28 Four-Pin mini DIN S-Video Connector Pin Assignment b. Signal Level Video (Y): Analog 0.1Vp-p/75Ω Video (C): Analog 0.286p-p/75 Sync (H+V): 0.3V below Video (Y) c. Frequency H: 15.734KHz V: 60Hz (NTSC) Signal Level Video (Y) : Analog 0.1Vp-p/75Ω Video (C) : Analog 0.286p-p/75Ω Sync (H+V): 0.3V below Video (Y) Frequency H: 15.734Khz...
  • Page 29 RGB Signal: a. Sync Type TTL (Separate / Composite) or Sync. On Green b. Sync polarity Positive or Negative c. Video Amplitude RGB: 0.7Vp-p d. Frequency H: support to 30K~70KHz V: support to 50~85Hz Pixel Clock: support to 110MHz HDMI Signal (HDMI): a.
  • Page 30: Main Board I/O Connections

    Chapter6 Main Board I/o Connections J1 C [Main BD to Power BD] ONNECTION Description “POWRSW” “+12V” “+12V” “+12V” “+12V” “GND” “GND” “GND” “+5V” “+5V” “+5V” “PWM” “BL ON/OFF” J2 C BD ] ONNECTION TO DISPLAY Description “BL-RED” “BL-WHITE” “+5V” “+5V” “IR”...
  • Page 31 J4 C Main BD to Side jack ONNECTOR Description “AV1-IN” “GND” “AV1L-IN” “GND” “AV1R-IN” “GND” “SY1-IN” “GND” “SC1-IN” “GND” “SVDET1” “NC” J6 C ONNECTOR PEAKER Description “R+” “R-” “L-” “L+” CONFIDENTIAL – DO NOT COPY Page 6-2 File No. SG-0211...
  • Page 32: Theory Of Circuit Operation

    There are 7 keys to control and to select the function of VX37. Also, there is a LED back light under the logo “VIZIO” to indicate the status of operation (Orange => STANDBY, White => ON). They are “Power, ▼▲, + -, Input, MENU”.
  • Page 33 MT5372 Ⅰ. GENERAL DESCRIPTION The MediaTek MT5372 consists of a DTV backend decoder and a TV controller and offers high integration for advanced applications in main stream integrated digital television market. The MT5372 combines a transport de-multiplexer, a high definition MPEG-2 video decoder, an AC3 audio decoder, an LVDS transmitter, and an NTSC/PAL/SECAM video decoder with a 3D comb filter.
  • Page 34 Functional Block Diagram Ⅱ. Features of MT5372 1. Key Features: 1. A transport de-multiplexer 2. An MPEG-2 video decoder 3. An AC3 audio decoder 4. A 3D comb TV decoder 5. PIP/POP mode 6. An HDMI receiver 7. A set of three VGA ADCs 2.
  • Page 35 3. Transport De-multiplexer: 1. Supports one independent transport stream input 2. Supports serial / parallel interfaces for transport stream input 3. Supports ATSC, DVB, and MPEG2 transport stream inputs 4. Programmable sync detection 5. Supports DES/3-DES/DVB/Multi-2 de-scramblers 6. Up to 8 PIDs even/odd keys for descrambling 7.
  • Page 36 7. Video Plane: 1. Supports clip 2. Flesh tone management 3. Gamma/anti-Gamma correction 4. Color Transient Improvement (CTI) 5. 2D peaking 6. Saturation/hue adjustment 7. Brightness and contrast adjustment 8. Black level extender 9. White peak level limiter 10. Adaptive Luma/Chroma management 11.
  • Page 37 10. CVBS Bypass: 1. Supports CVBS/S-Video bypass to Pin TP2 2. ATSC/DVB could not output to CVBS 11. VGA In: 1. Supports VGA input up to UXGA 150MHz 2. Supports full VESA standards 12. Component Video In: 1. Supports two component video inputs 2.
  • Page 38 18. DRAM Controller: 1. Supports 64Mb to 1Gb DDR DRAM devices 2. Configurable 16/32-bit data bus for MT5372 3. Supports DDR1-333, DDR1-400, DDR2-533, DDR2-667 JEDEC specification compliant SDRAM 19. Audio DSP: 1. Supports Dolby Digital AC-3 decoding (ATSC) 2. MPEG-1 layer I/II decoding (DVB) 3.
  • Page 39 Ⅲ. Electrical Characteristics 1. Absolute Maximum Rating 2. DC Characteristics CONFIDENTIAL – DO NOT COPY Page 7-8 File No. SG-0211...
  • Page 40 3. DDR1 ELECTRICAL Characteristics and DC Operating Condition 4. DDR1 AC Operating Condition 5. DDR2 ELECTRICAL Characteristics and DC Operating Condition 6. DDR2 AC Operating Condition CONFIDENTIAL – DO NOT COPY Page 7-9 File No. SG-0211...
  • Page 41 MT5112 1. GENERAL DESCRIPTION The MT5112BD is a highly integrated single-chip for digital terrestrial HDTV and digital cable TV de-modulation. The chip is designed specifically for the digital terrestrial HDTV and CATV receivers, and is fully compliant with ATSC A/53, SCTE DVS-031, and ITU J.83 Annex B standards.
  • Page 42 PIN ASSIGNMENT CONFIDENTIAL – DO NOT COPY Page 7-11 File No. SG-0211...
  • Page 43 PIN DESCRIPTION CONFIDENTIAL – DO NOT COPY Page 7-12 File No. SG-0211...
  • Page 44 2. 8-VSB and Clear-QAM Reception MT5112BD contains a 10-bit A/D converter, an 8-VSB/QAM demodulator, followed by a trellis-code de-modulation (TCM) decoder and a Reed-Solomon forward error correction (FEC) decoder. Moreover, an embedded 8-bit microprocessor intelligently handles the acquisition and tracking to ensure the best receiving performance under various channel conditions.
  • Page 45 The MT5112BD also utilizes a powerful equalizer for performing channel equalization in cable environments. The MT5112BD equipped with this powerful equalizer can easily pass the SCTE channel tests and offer stable and excellent live signal receptions. The following FEC decoder corrects most of the errors by the concatenation of the TCM and Reed-Solomon decoders with an in-between de-interleaver.
  • Page 46 3. FEATURES 1. Compliant with ATSC digital television standard 2. Supports SCTE DVS-031 and ITU J.83 Annex B digital CATV standard 3. Accepts direct IF (44 MHz or 43.75MHz) and low IF (5.38MHz) 4. Differential IF input with programmable input signal level: 0.5Vpp to 2Vpp 5.
  • Page 47 1. BLOCK DIAGRAM 2. Key Feather 48-pin LQFP package 2 Vrms DAC output MUTE and RESET functions 7-channel input multiplexer with ADC programmable gain amplifier’s (PGA’s) gain from +21dB to –21dB in 0.5dB step Two individual sets of I2S ports simultaneously support different sample rates for the ADC and DACs and then output from DAC1 and DAC2 independently CONFIDENTIAL –...
  • Page 48 3. Feather List 24-bit Sigma- Delta ADC and DAC Allows 2Vrms input swing into ADC part ADC up to 96 kHz sampling rates 90 dB ADC dynamic range Automatic gain control (AGC) 90 dB DAC dynamic range DAC up to 192 kHz sampling rates Two channels of ADC and four independent channels of DACs (two L/R line outputs and a headphone output) Supports two sets of I2S clocks and data inputs independently...
  • Page 49 1. Input configuration The TDA8946AJ inputs can be driven symmetrical (floating) as well as asymmetrical. In the asymmetrical mode one input pin is connected via a capacitor to the signal source and the other input is connected to the signal ground. The signal ground should be as close as possible to the SVR (electrolytic) capacitor ground.
  • Page 50 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).
  • Page 51 The MX29LV320AT/B uses a 2.7V to 3.6V VCC supply to perform the High Reliability Erase and auto Program/Erase algorithms. The highest degree of latch-up protection is achieved with MXIC's proprietary non-epi process. Latch-up protection is proved for stresses up to 100 milliamperes on address and data pin from -1V to VCC + 1V.
  • Page 52 BLOCK DIAGRAM CONFIDENTIAL – DO NOT COPY Page 7-21 File No. SG-0211...
  • Page 53 BUS OPERATION--1 Legend: L=Logic LOW=VIL, H=Logic High=VIH, VID=12.0 0.5V, VHH=11.5 -12.5V, X=Don't   Care, AIN=Address IN, DIN=Data IN,DOUT=Data OUT Notes: 1. When the WP/ACC pin is at VHH, the device enters the accelerated program mode. See "Accelerated Program Operations" for more information. 2.
  • Page 54 BUS OPERATION--2 Notes: 1.Code=00h means unprotected, or code=01h protected. 2.Code=99 means factory locked, or code=19h not factory locked. WRITE COMMANDS/COMMAND SEQUENCES To program data to the device or erase sectors of memory , the system must drive WE and CE to VIL, and OE to VIH.An erase operation can erase one sector, multiple sectors , or the entire device.
  • Page 55 TABLE A. MX29LV320AT/B COMMAND DEFINITIONS Legend: X=Don't care RA=Address of the memory location to be read. RD=Data read from location RA during read operation. PA=Address of the memory location to be programmed. Addresses are latched on the falling edge of the WE or CE pulse. PD=Data to be programmed at location PA.
  • Page 56 Notes: 1.All values are in hexadecimal. 2.Except when reading array or Automatic Select data, all bus cycles are write operation. 3.The Reset command is required to return to the read mode when the device is in the Automatic Select mode or if Q5 goes high. 4.The fourth cycle of the Automatic Select command sequence is a read cycle.
  • Page 57 RESET OPERATION 01The RESET pin provides a hardware method of resetting the device to reading array data. When the RESET pin is driven low for at least a period of tRP, the device immediately terminates any operation in progress, tristates all output pins, and ignores all read/write commands for the duration of the RESET pulse.
  • Page 58 SOFTWARE COMMAND DEFINITIONS : Device operations are selected by writing specific address and data sequences into the command register. Writing incorrect address and data values or writing them in the improper sequence will reset the device to the read mode. Table 3 defines the valid register command sequences.
  • Page 59 Fig D. READ TIMING WAVEFORMS CONFIDENTIAL – DO NOT COPY Page 7-28 File No. SG-0211...
  • Page 60 Fig E. RESET TIMING WAVEFORM CONFIDENTIAL – DO NOT COPY Page 7-29 File No. SG-0211...
  • Page 61 DRAM: (NT5DS16M16CS) The 256Mb DDR SDRAM is a high-speed CMOS, dynamic random-access memory containing 268, 435, 456 bits. The 256Mb DDR SDRAM is internally configured as a quad-bank DRAM. The 256Mb DDR SDRAM uses a double-data-rate architecture to achieve high-speed operation.
  • Page 62 1. Pin Configuration CONFIDENTIAL – DO NOT COPY Page 7-31 File No. SG-0211...
  • Page 63 2. Input/Output Functional Description CONFIDENTIAL – DO NOT COPY Page 7-32 File No. SG-0211...
  • Page 64 3. Block Diagram 4. Initialization Only one of the following two conditions must be met. • No power sequencing is specified during power up or power down given the following criteria: VDD and VDDQ are driven from a single power converter output VTT meets the specification A minimum resistance of 42 ohms limits the input current from the VTT supply into any pin and VREF tracks VDDQ /2 or The following relationships must be followed:...
  • Page 65 The DQ and DQS outputs are in the High-Z state, where they remain until driven in normal operation (by a read access). After all power supply and reference voltages are stable, and the clock is stable, the DDR SDRAM requires a 200µs delay prior to applying an executable command.
  • Page 66 5. Register Definition CONFIDENTIAL – DO NOT COPY Page 7-35 File No. SG-0211...
  • Page 67 6. Burst Definition Notes: 1. For a burst length of two, A1-A i selects the two-data-element block; A0 selects the first access within the block. 2. For a burst length of four, A2-A i selects the four-data-element block; A0-A1 selects the first access within the block.
  • Page 68 Operating Mode The normal operating mode is selected by issuing a Mode Register Set Command with bits A7-A12 to zero, and bits A0-A6 set to the desired values. A DLL reset is initiated by issuing a Mode Register Set command with bits A7 and A9-A12 each set to zero, bit A8 set to one, and bits A0-A6 set to the desired values.
  • Page 69 7. Simplified State Diagram CONFIDENTIAL – DO NOT COPY Page 7-38 File No. SG-0211...
  • Page 70 8. Absolute Maximum Ratings 9. Capacitance CONFIDENTIAL – DO NOT COPY Page 7-39 File No. SG-0211...
  • Page 71 10. DC Electrical Characteristics and Operating Conditions £ £ × ± ± (0°C C; V = 2.5V 0.2V, V 2.5V 0.2V, see AC Characteristics) 11. AC Characteristics 1. All voltages referenced to VSS. 2. Tests for AC timing, IDD, and electrical, AC and DC characteristics, may be conducted at nominal reference/supply voltage levels, but the related specifications and device operation are guaranteed for the full voltage range specified.
  • Page 72 5. The AC and DC input level specifications are as defined in the SSTL_2 Standard (i.e. the receiver effectively switches as a result of the signal crossing the AC input level, and remains in that state as long as the signal does not ring back above (below) the DC input low (high) level.
  • Page 73 PI3HDMI412FT-A Pericom Semiconductor’s PI3HDMI series of switch circuits are targeted for high-resolution video networks that are based on DVI/HDMI standards, and TMDS signal processing. The PI3HDMI412FT-A is an 8- to 4-Channel Mux/DeMux Switch. The device multiplexes differential signals to one of two corresponding outputs. The switch is bidirectional and offers little or no attenuation of the high-speed signals at the outputs.
  • Page 74 Block Diagram CONFIDENTIAL – DO NOT COPY Page 7-43 File No. SG-0211...
  • Page 75 Pin Description Pin Description Maximum Ratings CONFIDENTIAL – DO NOT COPY Page 7-44 File No. SG-0211...
  • Page 76 DC Power Supply Characteristics Power Supply Characteristics Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at TA = 25°C ambient and maximum loading. Switching Waveforms CONFIDENTIAL –...
  • Page 77: Waveforms

    Chapter8 Waveforms PC MODE(1366X768 60HZ) CH1 H-sync (R209); CH2 V-sync (R213) CH1 GREEN (R195) CONFIDENTIAL – DO NOT COPY Page 8-1 File No. SG-0211...
  • Page 78 CH1 GP (C89) CH1 GREEN # (R195); CH2 VGAVSYNC (R213) CH1 VGAL_IN (R208); CH2 VGAR_IN (R207) [Audio] CONFIDENTIAL – DO NOT COPY Page 8-2 File No. SG-0211...
  • Page 79 CH1 VGAL_IN (CE56+) ; VGAL_IN (CE56-) AV&TV MODE (AV1/AV2/TV) VIDEO CH1 CVBS2 (R146); CH2 AV2CVBS (C52) CONFIDENTIAL – DO NOT COPY Page 8-3 File No. SG-0211...
  • Page 80 CH1 AV2L (CE46-); CH2 AV2L (U27 PIN15) CH1 AUSPL (R335);CH2 OUT2+5(J6 PIN4) CONFIDENTIAL – DO NOT COPY Page 8-4 File No. SG-0211...
  • Page 81 CH1 DACBCLK (U28 PIN4); CH1 DACMCLK (U28 PIN5); CONFIDENTIAL – DO NOT COPY Page 8-5 File No. SG-0211...
  • Page 82 CH1 DACLRCK (U28 PIN7) COMPONENT MODE (COMPONENT 1/2) CH1 Y1_IN (R180); CH2 Y1P (C77) CONFIDENTIAL – DO NOT COPY Page 8-6 File No. SG-0211...
  • Page 83 CH1CR1_IN (R190) CH2 PR1P (U27 PIN11) HDMI 1&2 CH1 RX0_2 (P6 PIN 1); CH2 DATA2+ (U31 PIN3) CONFIDENTIAL – DO NOT COPY Page 8-7 File No. SG-0211...
  • Page 84 CH1 HDMIDDCSCL_0(R235) ; CH2 HDMICAB0 (Q8 PIN3) DTV HD CH1 VOB0 (RP35) CONFIDENTIAL – DO NOT COPY Page 8-8 File No. SG-0211...
  • Page 85 CH1 AO1MCLK (DU9 PIN J1 ) CH2 AO1BCK (DU9 PIN J2) CH1 VOHSYNC (DU9 PIN V4) CONFIDENTIAL – DO NOT COPY Page 8-9 File No. SG-0211...
  • Page 86 CH1 VOVSYNC (DU9 PIN W1) CH1 VODE (DU9 PIN W2) CH1 VOPCLK (DU9 PIN V3) CONFIDENTIAL – DO NOT COPY Page 8-10 File No. SG-0211...
  • Page 87: Trouble Shooting

    Chapter 9 Trouble shooting MONITOR DISPLAY NOTHING (PC MODE) Start Is Power board output +5V(F2)? LED is lighted Is J1 connector good? (Orange) Is DC-DC OK? Is U8 pin2 (3.3V) working ok? It is in power saving Check video cable Is the timing supported? LED is lighting? Check sync input...
  • Page 88 (TV, COMPOSITE VIDEO1, 2, S-VIDEO) IS NOT DISPLAY CORRECTLY Start 1. Check video Input signal good? 2. Check DVD player 1. Check P11&J4 signal 2. Check signal between P2 and U4 (IF AV1/AV2 mode) 3. Check Tuner &U4 (IF TV mode) U4 input correct? 4.
  • Page 89 (COMPONENT1, 2) IS NOT DISPLAY CORRECTLY Start 1. Check video Input signal good? 2. Check host’s setting 1. Check signal from P1 P4 input correct? 2. Check system power 12V& 5v 1. Check signal between U4&P1 U11 input correct? 2. Check X1 Clock (27MHZ) Is LVDS output 1.
  • Page 90 HDMI ) IS NOT DISPLAY CORRECTLY Start 1. Check video Input signal good? 2. Check host’s setting 1. Check p6&p7 connect U11 no data out ? 2. Check the pin18 & 19 of P6 & P7 3. Check the pin 6 of U23 & U25 1.
  • Page 91 TROUBLE OF DC-DC CONVERTER Start The voltage is about + 5V 1. Check power board J1 PIN10,11,12 2. Check power cable, F2 & connection J1 3. Check U8 pin1 (+5V) & pin2 (+3.3V) The voltage is about + 12V while power switch on 1.
  • Page 92 TROUBLE OF EDID READING Start Support DDC1/2B 1. Analog cable ok? Is Analog DDC OK? 2 .Check signal (U21 to P3) 3. Check U21 Voltage 4. Is protocol compliant? Support DDC1/2B 1. Analog cable ok? Is HDMI DDC OK? 2. Check signal (U23 to P6) 3.
  • Page 93: Block Diagram

    Chapter 10 System Block Diagram System Block Diagram LCD display device Digital Video bus AC IN Power Board Speakers Main Board P10 P9 □□□□□ Keypad/IR Board Our LCD TV system works at the AC power supplying 100V~240V AC +/- 10% @ 50/60 HZ.
  • Page 94 The RF signals include analog and digital TV signals. Two kinds of signals are processed by two kinds of ways. We introduce the processing way of analog signals, then digitals is similar they. First of all, analog signals are processed by MT5372.
  • Page 95 Main Board Block Diagram CONFIDENTIAL – DO NOT COPY Page 10-3 File No. SG-0211...

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