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XOCECO LC22K9 Service Manual

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COLOR TELEVISION
LC22K9

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Summary of Contents for XOCECO LC22K9

  • Page 1 COLOR TELEVISION LC22K9...

  • Page 2: Table Of Contents

    CONTENT Safety instructions………………………………………………………………………..… Instructions on adjusting and testing…………………………….…….………………… Trouble shooting……………………………………………………….…………………… Principle analysis of LC-22K9……………………………………….………..…………. LC22K9 BLOCK DIAGRAM…………………………………………………………………0 Wiring diagram……………………………………………………………..……………..Components No…………………………………………………………………………….… Identification criteria for the bright spot and dark spot of the LCD screen………..…. Troubleshooting guide………………………………………………………………..…… Exploded views…………………………………………………………………………..… Schematic diagram…………………………………………………………………….…..

  • Page 3: Safety Instructions

    Attention: This service manual is only for service personnel to take reference with. Before servicing please read the following points carefully. Safety instructions 1. Instructions 1.1 Be sure to switch off the power supply before replacing or welding any components or inserting/plugging in connection wire 1.2 Anti static measures to be taken (throughout the entire production process!): a)Do not touch here and there by hand at will;...
  • Page 4 2.9 As most of the circuitry in LCD TV set is composed of CMOS integrated circuits, it’s necessary to pay attention to anti statics. Before servicing LCD TV make sure to take anti static measure and ensure full grounding for all the parts that have to be grounded. 2.10.There are lots of connection wires between parts behind the LCD screen.

  • Page 5: Instructions On Adjusting And Testing

    Instructions on adjusting and testing The adjustment of LC22K9 excludes 2.30 2.1 Adjusting and calibrating the equipment PM 5518(video frequency signal generator), K-7253(VGA signal generator),CA210(white balancer) 2.2 Adjustment and calibration procedure 2.3 Adjusting and calibrating the monitor board Place the monitor board on the testing jig, turn on the power supply and switch on the set to see if it is normal.
  • Page 6 Check if FLASH is written Production of the main board and decoders on the line Check Monitor board Check decoders in media board General assembly and combined calibration Connect central signal source, check TV functions (station skipping, analog quantity control etc) . Check if the output of speaker is normal Input AV/S and HDTV signal and check following functions of the terminals...
  • Page 7 “ENTER” key to select different adjustment items. When VGA and DVI are input, select “mode” and then push “ENTER” key and select three color temperatures 6500K,9300K,12000K. Push “MENU” to quit factory menu. Notice: Adjustment of Media Box must be performed under the mode --”Nature” of picture. 2.4.1 EPROM Initialization Enter the first page of factory menu, select clear eprom and push “ENTER”...

  • Page 8: Trouble Shooting

    2.4.4 Adjusting white balance of YPbPr channel Input YPbPr signal of K-7253 to terminal of YPbPr, input 8 gray degree signal to TIME380(480i)PATTERN471, adjust S-brightness to 20,and S-contrast 140. Enter adjustment menu of white balance, adjust second degrees by white balancer. Adjust offset_R,offset_G,offset_B to set the second color coordinate to 270 283 and the brightness to about 5nit.
  • Page 9 2.TV set: Symptoms Possible cause Unable to switch the power on Check to see if the power plug has been inserted properly into the socket. No picture and sound Check to see if the power supply of liquid crystal TV has been switched on.
  • Page 10 Blur picture Check if the antenna cable is correctly connected. Of if it has received the right video signal. No sound Check if the “mute” audio frequency setting is selected. Check if the sound volume is set to minimum. Make sure the earphone is not connected. Check if the cable connection is loose.

  • Page 11: Principle Analysis Of Lc-22K9

    Principle analysis of LC-22K9 For the working principle of LC-22K9 please refer to LC-22K9 block diagram of the complete TV set. Following is a short description of the signal flow: RF signal through an integral tuner TUNER201 produces complete color TV signal which is input, together with AV1/SVHS(SVHS in priority)AV2 and PCMCIA video signals, into U29 VPC3230D for conversion selection and decoding.

  • Page 12: Lc22K9 Block Diagram

    LC22K9 BLOCK DIAGRAM U15 DVI receiver 24bit TFP403/501 LVDS SCALER 24bit TUNER201 DRIVER JAG-ASM DS90C383A 24bit DEINTER AV1-V/S-Y LACER ITU-R656 FLI2310 8bit KEY BOARD SVHS-C AV2-V PCMCIA-YUV SDRAM SDRAM SDRAM AV-V OUT I C BUS V-CHIP Z86229 FLASHMEMORY MICRO-CONTRLER EEPROM...
  • Page 13 Block diagram and description of LC-22K9 main IC 1.MSP3420 Pins description: 2,3 PIN:SCL,SDA applied for control the operation of IC . 27,28 PINAoutput left and right sound channel R/L to speaker processor. 36,37 PIN:AV OUT of sound R/L. 47,48 PIN:DVI/YPRPB/PCMCIA selected input R/L. 50,51 PIN:Input of VGA.
  • Page 14 2.VPC3230 Pins description: 4 PIN: Input U of PCMCIA. 5,73 PIN: Input Y of PCMCIA. 6 PIN: Input V of PCMCIA 31-34, 37-40 PIN:output format signal of.ITU-R656 70 PIN:Video of AV OUT 71 PIN:Input C of SVHS. 72 PIN:input Video (SVHS in priority) of Y or AV1 of SVHS. 74 PIN:input Video of AV2.
  • Page 15 3.Z86229 Figure 1. Z86229 Block Diagram Pin description: 7 PIN:Video input 2 PIN:G output 3 PIN:B output 18 PIN:R output 17 PIN:FB output...
  • Page 16 4.JAG-ASM...

  • Page 17: Wiring Diagram

    WIRING DIAGRAM Analog board 667-L22K9-53 X212 X204 X201 X213 POWER PANEL INTERFACE CONTROL AUDIO VIDEO CPU board 667-L22K9-56...

  • Page 18: Components No

    Components No. Part Name Part No Main components and No Remark N201 MSP3420G-Q (353-34200-10) N203 M62494FP (353-62494-20) N207 LX1722 (353-17220-30) Analog board assy’ 667-L22K9-53 Self produced N205 N206 SI4532ADY (353-45320-80) N208 N210 JAG-ASM (353-0JAG0-00) FLI2310 (353-23100-00) TFP403PZP (353-04030-10) VPC3230D (353-32300-80) MST9883B (353-98830-10) CPU board assy’...

  • Page 19: Identification Criteria For The Bright Spot And Dark Spot Of The Lcd Screen

    Identification criteria for the bright spot and dark spot of the LCD screen Q’ty 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 2 neighboring ≥15mm ≤2...

  • Page 20: Troubleshooting Guide

    Trouble shooting gude 1. No grating Connect power supply, check if the red light is on when Blue in stand-by? Push key on the R/C set or push power key to put on the set, to check the status of the indication lamp Check No color...
  • Page 21 There is grating but no picture Check If this set channels can be operated without by R/C or push pictures key? VGA/DVI Which channel without picture? Enter factory adjustment menu ， execute Change CPU CLEAR change EEPROM, after operation board shut off and re-put on to YPrPb board...
  • Page 22 No sound (with TV input as an example) Check R282 burns. Check the output Check the soldering Check if TP2 is wave form of foot 5 problem of N207 tri-angle wave. and 8 of N203 Change N207 Check the output wave form foot 27,and 28 Change N203 of N201...

  • Page 23: Exploded Views

    EXPLODED VIEWS...
  • Page 24 Exploded views list Name Name connector cover speaker box connector speaker box front cabinet speaker grille acryl panel speaker rear cabinet cover(lower) light indicator rotate axis cover(back) speaker box rear cabinet rotate axis assy' main board supporter assy' column metallic terminal panel(left) stand upper cover plastic terminal panel(left) stand lower cover...
  • Page 44 0.1UF No need to installEZ1085 circuitry if J12 provide +3.3V WM8706 VCCA 203-L30K90-03 PCMCIA 型号规格 拟制 CB48 CB50 CB53 CB54 CB55 CB56 编号 0.1UF OPEN(10UF) 0.1UF 10UF 0.1UF 10UF 复核 782-L40D9-9000 标准化 第 张 共 张 工艺 批准 厦门华侨电子企业有限公司 XOCECO...
  • Page 45 74F273 47UF CB31 PCMCIA 1117/3.3V 0.1UF 203-L30K90-03D EAUX41 PCMCIA 拟制 型号规格 IO/MEM 编号 复核 0 = Memory Cycle, activate OE# and WE/P# 782-L40D9-9000 1 = I/O Cycle, activate IORD# and IOWR# 标准化 工艺 第 张 共 张 批准 XOCECO 厦门华侨电子企业有限公司...
  • Page 46 10UF 203-L30K90-03 PHOTO_EN# TWS- 33 OHM LRCIN VMID MCLK- 33 OHM PCMCIA 拟制 型号规格 MCLK TBCK- 33 OHM TBCK BCKIN TSD0- 33 OHM 编号 复核 TSD0 0.1UF 10UF 782-L40D9-9000 标准化 PORT WM8706 第 张 共 张 工艺 厦门华侨电子企业有限公司 批准 XOCECO...
  • Page 47 XOUT ESS REMOTE INTERFACE 3.3UH 1 0 0 K 203-L30K90-03D 33 OHM IR_DATA 拟制 型号规格 PCMCIA 2 7 M 33 OHM 74HCT32 编号 27PF 27PF 1000PF 复核 782-L40D9-9000 150P (150PF) 标准化 27MHZ 工艺 第 张 共 张 厦门华侨电子企业有限公司 批准 XOCECO...

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