Download
Share
Print this page
  1. Manuals
  2. Brands
  3. XOCECO Manuals
  4. LCD TV
  5. LC-42R27
  6. Service manual

XOCECO LC-42R27 Service Manual

Hide thumbs

Advertisement

Quick Links

Download this manual
LCD TELEVISION
LC-42/47R27

Advertisement

loading
Need help?

Need help?

Do you have a question about the LC-42R27 and is the answer not in the manual?

Questions and answers

Related Manuals for XOCECO LC-42R27

Summary of Contents for XOCECO LC-42R27

  • Page 1 LCD TELEVISION LC-42/47R27...

  • Page 2: Table Of Contents

    CONTENTS Safety precautions………………………………………………………………………..… Alignment instructions …………………………….…….……………………………….… Working principle analysis of the unit……………………………….………….…………. Block diagram…………………………………..………………………………….………… IC block diagram………………………………………………………………………..…… Wiring diagram ……………………………………………………………..……………... Troubleshooting………………………………………………………………………..…… Schematic diagram ………………………………………………………………………… APPENDIX-A: Main assembly list APPENDIX-B: Exploded view...

  • Page 3: Safety Precautions

    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;...

  • Page 4: Alignment Instructions

    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.
  • Page 5 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; check if various TV functions (station skipping, modulate quantity control etc), check if the output of earphone and speaker are normal.
  • Page 6 3.1 EEPROM initialization and back light adjustment Enter the firs page of factory menu, adjust item OPTION-1 to 9, OPTION-2 to 5 and back light to 255(LG PANEL) or 0(SHARP and CMO panel), select the EEPROM initial after, press the VOL+ button, then display the DOING, still the DOING disappear and turn off the unit.
  • Page 7 3.3.2 VGA channel auto color adjustment Input the VG-848 TIME854(800x600/60Hz) and PATTERN920(GRAY 8 STEP(H)), enter the factory menu1, select the AUTO COLOR after, press the VOL+ button to select AUTO COLOR. 3.4 YPBPR channel adjustment Input the VG-848 TIME972(1080i/60Hz) and PATTERN976(64 GRAY & Color), enter the factory menu1, select the AUTO COLOR after, press the VOL+ button to select AUTO COLOR.

  • Page 8: Working Principle Analysis Of The Unit

    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.

  • Page 9: Block Diagram

    Block diagram ANA_IN1 SC4_L/R SC3_L/R...

  • Page 10: Ic Block Diagram

    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.
  • Page 11 Fig. 1–1: Simplified functional block diagram of the MSP 34x0G...
  • Page 12 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.
  • Page 13 INTERNAL BLOCK DIAGRAM:...
  • Page 14 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.
  • Page 15 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.
  • Page 16 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.
  • Page 17 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.
  • Page 18 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.
  • Page 19 8. CXA2089Q...
  • Page 20 9. AML3428 The AML3428 is a highly integrated device that provides cost-effective solutions in MPEG-2 and HVD systems. The diagram below highlights the main components of the AML3428.

  • Page 21: Wiring Diagram

    Wiring diagram...

  • Page 22: Troubleshooting

    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.
  • Page 23 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.
  • Page 24 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...
  • Page 25 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...
  • Page 26 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...
  • Page 27 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 NA9 (pin1) Check the Check...

  • Page 28: Schematic Diagram

    Graphic/Component IN of CPU board 203-L37R70-01DL Page 1 of 7...
  • Page 29 Video decoders of CPU board 203-L37R70-01DL Page 2 of 7...
  • Page 30 CPU board 203-L37R70-01DL Page 3 of 7...
  • Page 31 Frame memory of CPU board 203-L37R70-01DL Page 4 of 7...
  • Page 32 GM1601 of CPU board 203-L37R70-01DL Page 5 of 7...
  • Page 33 Memory I/F of CPU board 203-L37R70-01DL Page 6 of 7...
  • Page 34 Power of CPU board 203-L37R70-01DL Page 7 of 7...
  • Page 35 Analog board 782-L37R7-5300 Page 1 of 2...
  • Page 36 Analog board 782-L37R7-5300 Page 2 of 2...
  • Page 42 APPENDIX-A: Main assembly (LC-42R27) NAME MAIN COMPONENT AND it’S NO. Analog board 667-L42R27-53 MSP3420 (352-34200-10) M62494FP (353-62494-20) TPA3008D2 (353-30080-10) CPU board 667-L37R18-56A GM1601 (353-16010-20) FLI2310 (353-23100-00) TVP5160 (353-51600-10) TVP5147 (353-51470-10) MST3383MB (353-33830-10) USB board 667-L37R7-16 AML3428 (353-34280-20) IR board 667-L42R27-09...
  • Page 43 603-L42R270-10 Ver.1.0...

This manual is also suitable for:

Lc-47r27