CONTENTS Safety precautions………………………………………………………………………..… Alignment instructions …………………………….…….……………………………….… Working principle analysis of the unit……………………………….………….…………. Block diagram…………………………………..………………………………….………… IC block diagram………………………………………………………………………..…… Wiring diagram ……………………………………………………………..……………... Troubleshooting………………………………………………………………………..…… Schematic diagram ………………………………………………………………………… APPENDIX-A: Part list APPENDIX-B: Exploded view...
Attention: This service manual is only for service personnel to take reference with. Before servicing please read the following points carefully. Safety precautions 1. Instructions Be sure to switch off the power supply before replacing or welding any components inserting/plugging in connection wire Anti static measures to be taken (throughout the entire production process!): a) Do not touch here and there by hand at will;...
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would be unable to work and no way to get it repaired. 2.11 Special care must be taken in transporting or handling it. Exquisite shock vibration may lead to breakage of screen glass or damage to driving circuit. Therefore it must be packed in a strong case before the transportation or handling.
Alignment instructions 1. Test equipment PM5518 (Video signal generator) VG-848 (Signal generator) CA210 (White balancer) 2. The alignment flow chart (see below figure) Check DDC, HDCP KEY and FLASH Production of main board and analog board on the line. Check CPU board and analog board Combined test for general assembly Connect to central signal source;...
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Check accessories and then packing 3. The unit adjustment Enter factory menu method: press the SOURCE→ 2→ 5→8→0 buttons one by one on the remote control to factory menu. Press the MENU button to select item. Press the DSP button to exit the factory menu.
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26SHARP 32SHARP Note: R-OFFSET, G-OFFSET and B-OFFSET values must be an item value to 128 at least; R-GAIN, G- GAIN and B- GAIN values must be an item value to 255 at least. 3.3 VGA channel adjustment 3.3.1 mode pre-set Input the VGA signal of VG-848 (PATTERN 980:1 dot ON/OFF), select the TIME877 (720x400/70Hz) signal, press auto-adjust button to all screen or adjust PC setting menu to auto correction.
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Separate input HDMI and DVI signal; check the picture and sound is normal, check if the HDCP function is normal. 4.5 check the sound channel Check the speaker and headphone of each channel. 4.6 ex-factory setting Enter the first page of factory menu, select the factory out after, press the VOL+ button to display “doing”, then “doing”...
Working principle analysis of the unit The RF1 via integrative tuner TUNER1 after, the FBAS VIDEO1 and SIF is generated. The RF2 via integrative tuner TUNER2 after, the FBAS VIDEO2 and AUDIO is generated. Video signal and audio signal of VIDEO1,VIDEO2,AV1/SVHS1,AV2,AV3/SVHS2 and audio signal of VGA and so on, its sent NA3 (CXA2089Q) to switch selection.
Block diagram Power_ON,IR,KeyA,KeyB,Led1,Led2 Hs Vs Hs Vs Mute,HP_SW,VGA_CAB,DVI_CAB SN74AHC14 EDID YUV/VGA,YUV_SW,YUV/USB 24C02 R G B RGB Switch R G B CBT3257C Y Pb/Cb Pr/Cr Y Pb/Cb Pr/Cr HDTV Switch HDTV Switch YPbPr 1 CBT3257C CBT3257C Frash/ROM YPbPr 2 YUV_SW YUV/USB Frame Buffer YUV/VGA OPTION...
IC block diagram 1.MSP3420 The MSP 34x0G family of single-chip Multistandard Sound Processors covers the sound processing of all analog TV-Standards worldwide, as well as the NICAM digital sound standards. The full TV sound processing, starting with analog sound IF signal-in, down to processed analog AF-out, is performed on a single chip.
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Fig. 1–1: Simplified functional block diagram of the MSP 34x0G...
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2. TVP5160 The TVP5160 device is a high quality; digital video decoder that digitizes and decodes all popular baseband analog video formats into digital component video. The TVP5160 decoder supports the A/D conversion of component YPbPr and RGB (SCART) signals, as well as the A/D conversion and decoding of NTSC, PAL, and SECAM composite and S-Video into component YCbCr.
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3. TPA3008D2 The TPA3008D2 is a 10-W (per channel) efficient, class-D audio amplifier for driving bridged-tied stereo speakers. The TPA3008D2 can drive stereo speakers as low as 8. The high efficiency of the TPA3008D2 eliminates the need for external heatsinks when playing music. The gain of the amplifier is controlled by two gain select pins.
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4. MST3383MB The MST3383MB integrates the HDMI compliant receiver for enabling advanced digital display devices such as digital TVs, plasma displays, LCD TVs and projectors to receive and display. Compliant with the HDMI 1.0 specification, the MST3383MB enables consumer electronic devices to receive uncompressed, high quality, digital audio and video HD content over a single, low-cost HDMI cable.
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5.GM1601/GM1501 The gm1601H is a dual channel graphics and video processing IC for Liquid Crystal Display (LCD) monitors and televisions incorporating Picture in Picture, up to WUXGA output resolutions. The gm1601H provides all key IC functions required for image capture, processing and display timing control.
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6. FLI2310 The FLI230x and FLI2310 are highly integrated digital video format converters for DTV and DVD applications using patented deinterlacing and post processing algorithms from Faroudja Laboratories, coupled with highly flexible scaling, a wide variety of aspect ratio conversions, and other special video enhancing features to produce the highest quality image.
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and Subtitle Display Modes 6.8 TrueLife™ Enhancer Two dimensional, non-linear, luma and chroma video enhancer brings out details in the picture, producing a more life-like image. 6.9 Memory 32-bit wide SDRAM (i.e. one 2M x 32-bit, or two 1M x 16-bit) controller, up to 166 MHz operation, for external SDRAM INTERNAL BLOCK DIAGRAM: 7.
Trouble shooting 1. Fault clearance Before servicing please check to find the possible causes of the troubles according to the table below. 1.1 Antenna (signal): Picture is out of focus or jumping Bad status in signal receiving Poor signal Check if there are failures with the electrical connector or the antenna.
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signal types. Picture too bright and there is Check if the contrast setting is too high. distortion in the brightest area Possibly the output quality of DVD broadcaster is set too high. It maybe also due to improper terminal connection of the video frequency signal in a certain position of the system.
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2. Identification criteria for the bright spot and dark spot of the LCD screen Quantity allowed Distance between two spots Category Criteria 15" 20" 22" 30" 40" 15" 20" 22" 30" 40" One single ≤5 ≤2 ≤5 ≤2 ≤3 spot Bright ≥15mm spot...
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3. Troubleshooting guide 1. Without backlight In STANDBY, does LED red light Green Does LED flicker Check the LED Check the pin1 and pin3 of No change color CN3 has +5V output Replace CPU board Check if the X508 (pin1-2) of the power Check Replace supply board...
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2. With backlight, without picture Does remote control and key of the unit Does not picture operate? of all channel TV/VIDEO HDMI Which no picture Display OSD? YPBPR Enter the factory Does R223 and menu, the CLEAR Check the Check if C16 Main Check R216-R219...
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3. No sound Check if the pin2 of XA15 is 18V? Check Which is high RA136 short to level for DA8, the ground? DA10, DA11? Check DA10 DA11 pin1 and pin2 of XA17 is 18V? Is high level of Check the (pin1) Check the Check...
PART LIST PART# DESCRIPTION LOCA.NO. SL37R70-01A10 SOFTWARE 100-L37R250-11 LC-37R25 100-L37R250-02 LC-37R25 B30 335-37014-00 DISPLAY SCREEN T370HW01V.1 364-42201-00 SOCKET WP2-9C 364-42201-00 SOCKET WP2-9C 364-42201-00 SOCKET WP2-9C 364-42201-00 SOCKET WP2-9C 485-10170-0A *POWER CORD LAP-31+LASR-24 488-10007-01 BATTERY (5# NO CHINESE , IRON CASE )
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804-2A401-00 INTERFACE SPACE PLATE ( TV BOARD LEFT ) 804-2A402-00 INTERFACE SPACE PLATE ( TV BOARD BOTTOM ) 804-2A403-00A INTERFACE SPACE PLATE ( DIGITAL BOARD ) 808-10812-AF0 POWER CORD COVER BOARD ( GREY 05) 808-10892-AF0 BACK CABINET BAFFLE ( LEFT ) GREY 05 808-10893-AF0 BACK CABINET BAFFLE ( RIGHT ) GREY 05 808-10894-AF0...
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471-1068H-00 PEAKING COIL EL0606SKI-680J LA55 590-40716-00 TUNER JS-6AM/134 TUNA1 590-40718-00 TUNER JS-6AM/134-A2 TUNA2 655-4E301-110 (4-PINS) LEAD WITH HOUSING XA19 655-64301-14 (6-PINS) LEAD WITH HOUSING 655-6E301-62 (6-PINS) LEAD WITH HOUSING 655-8E301-45 (8-PINS) LEAD WITH HOUSING XA10 655-B1201-66 (12-PINS) LEAD WITH HOUSING XA14 665-N0100-00 COAXIAL CABLE CSYV-2B-100...
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