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Prima LC32M5S Service Manual

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LCD TELEVISION
LC32M5S

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Summary of Contents for Prima LC32M5S

  • Page 1 LCD TELEVISION LC32M5S...

  • Page 2: Safety Instructions

    This service manual is only for service personnel to take reference with. Before Attention: servicing please read the following points carefully. Safety instructions 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 3 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 4: Alignment Instruction

    Alignment instruction 1 Alignment equipment PM5518 (video signal generator) K-7253 (VGA signal generator) PM54200 (SCART signal generator) VG-848 (YUV, VGA and DVI signal generator) CA210 (white balancer) 2 Alignment flow-chart The alignment flow-chart is shown as fig-1 Check DDC, HDCPEEPROM, PAL and FLASH To produce data processor board and analog board Check the data processor board and analog board All testing...

  • Page 5: Performance Check

    Enter the first page of factory menu, select “EEPROM erase” and then press “enter”, shut down the unit after “ok” appears. 3.2 white balance adjustment YPbPr channel Input 480I (968 model) signal of VG-848 to YPbPr terminal, input 16 level gray-scale signal, set the fixed-value of R Gain to 80H, G Gain to 80H and B Gain to 80H for white balance adjust.
  • Page 6 1024 x 768 56.476 70.069 VESA 1024 x 768 60.023 75.029 78.75 VESA Factory Option Menu set Items Ex-factory set EEPROM Erase Backlight Adjustable Back Light Menu Timeout Blank switch enable Show Logo Auto Channel Label Disable SRS active Stereo TT Char Group West Europe PIP Clock Delay...
  • Page 7 Volume 50 Volume Max Prescale Scart Prescale FM/AM Prescale Nicam Scart1 Volume Scart2 Volume D/K select HDEV3 Equalizer Bands Max Spatial Mode White Balance Adjust Items Ex-factory set R Offset G Offset B Offset R Gain G Gain B Gain Brightness Contrast Picture analog set...

  • Page 8: Troubleshooting

    1) Set TV channel 2) AV menu Mode: Standard, NR: Auto; 3) Sound menu model, Volume: 20,Balance:00,Equalizer: Custom, HP Volume: 20; 4) Edit menu model, Color System: Auto, Sound System: DK; 5) Option menu model, Default Zoom: Auto, Child Lock: Off, Menu Language: English, Country: UK, WSS:OFF, Blue Screen: On.
  • Page 9 correct. Deterioration of color phase or color Check if all the picture setups have been corrected. tone Screen position or size is not proper Check is the screen position and size is correctly set Picture is twisted and deformed Check to see if the picture-frame ratio is properly set Picture color changed or colorless Check the “Component”...

  • Page 10: Method Of Software Upgrading

    bottom of the picture. may lead to incorrect display of the liquid crystal TV, In this case please press “auto” key on the remote control so as to enable the liquid crystal TV set to recheck the signal and then to display correct picture signal Method of software upgrading Steps of software upgrading are as follows:...
  • Page 11 LC-32M5S block diagram...
  • Page 12 Main IC 1.Sound processing IC (MSP3410) Main pins function: 2, 3: SCL, SDA, control IC 27, 28: To R/L of sound amplifier 24, 25: R/L of Earphone; 36, 37: R/L of AV OUT; 33, 34: R/L of TV OUT; 47, 48: R/L from main board; 50, 51: R/L of SCART2;...
  • Page 13 2.sub-channel and AV signal decoder IC of SCART (VPC3230) Main pins function: 13, 14: SCL, SDA, control IC; 4, 5, 6: RGB input of SCART1; 74: AV signal of SCART1 and complex sync of RGB input 71, 72: Y/C of SCART2 input; 73: AV signal of sub tuner input;...
  • Page 14 3. Receive of YPbPr/YcbCr and RGB (MST9883) Main pins function: 56, 57: SCL, SDA, control IC; 43, 48, 54: RGB/YUV input; 30, 31: H/V sync of RGB input;...
  • Page 15 4. Receive of DVI (TFP501) 5. Main picture decoder and processing (PanelTv-Svp) Main pins function K4, J1: SCL, SDA, adjustment IC L2, P4: Y/C of S-video ; L4: AV of main tuner input; L3: AV input; Y10, Y11, W11: analog RGB output; U13, V13, Y2: H/V sync and PCLK output.

  • Page 16: Main Assembly

    Main assembly NAME MAIN COMPONENT AND it’S NO. Sound processing board 667-L32M5S-69 N101 PanelTv－Svp （353-PANEL-20） N201 MST9883 （353-98830-10） N401 VPC3230 （353-32300-80） N501 SDA5550M（353-55500-00） N502 W29C040 （353-29040-00） N601 DS90C383（353-03830-70） N761 TFP501 （ 353-05010-00 ） (353-77200-10) AV processing board 667-L32M5S-40 TUNER201 JS-6B2/122A2-A2 （590-40512-00）...

  • Page 17: 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 ≥15mm 2 neighboring ≤2...

  • Page 18: Wiring Diagram

    Wiring diagram Power board AV processing board Data processing board Keypad board Update board IR board...

  • Page 19: Troubleshooting Guide

    Troubleshooting guide 1. Process of diagnosing happening troubles Main power switched on Check if power supply, infrared board, CPU Indication lamp red? and peripherals (flash) and power line are in trouble Yes, switch it on Check if the 88 pin of CPU is square wave. Indication lamp Yellow? Check CPU peripherals, FLASH/SRAM peripherals...
  • Page 20 2.Trouble of 3-no’s (no raster, no picture and no sound) 3-no’s If power indication lamp is lit Is indicator Check Standby5V yellow? Disconnect power supply Check if I C bus Check CPU (N501), board with data processor line of the system is FLASH (N502), GAL and measure Standby5V short-circuited...
  • Page 21 between N501, N502 and N503, in addition to inspect the welding condition of relevant parts and fittings. If the waveform detected is of regular square wave or no signal, it shows that N501 or N502 or N503 is abnormal so that the address link and data link between them become out of order.
  • Page 22 Check N201 Check on peripheral circuit of power amplifier and power supply signal input Check all levels of circuit following the Check N201 channel of audio signal input peripheral circuit of power amplifier and power supply Note: It is after the changeover by external audio switch that the audio signal of high definition, DVI and VGA channels enters MSP3410 through.
  • Page 23 b). No picture for S terminal Check if C140 and C144 have signal input Problem in the channel form S Check if line/field sync. signal and terminal socket to N101 clock signal output from N101 are normal. Check peripheral Check peripheral circuit of circuit of N601 N101, crystal oscillation, and and power supply...
  • Page 24 No picture in sub-screen: Check if 73 pin of N401 has signal input Check if line/field sync. signal Check if 12 pin of TUNER202 and clock signal output from on TV board has signal output N401are normal Check peripheral circuit of Check if TUNER20, power supply Check...
  • Page 25 Check if line/field Check the channel from sync. signal N501 N501 clock signal output SCART1 socket from N401 Check if line/field Check peripheral sync. signal circuit N401, clock signal output crystal oscillation from N101 and power supply normal Check peripheral circuit of Check periph-eral N101, crystal oscillation and...
  • Page 26 Check peripheral Check peripheral circuit of circuit of N601 N101 crystal oscillation, power supply and power supply f).No picture in YPbPr/YcbCr channel Check if 43 and 54 pins of N201have signal input Check if line/field syn. signal Check if 4 and clock signal output from pins of N703 have N201 are normal...
  • Page 27 g). No picture in D_Sub channel If the display of YpbPr input signal is normal Check as per inspection Check if 30 and 31 program (f) pins of N201have syn. signal input There is problem with Check if 1st and 5th the channel from VGA pins of N701 have sync.
  • Page 28 Note: To enable DVI picture to be displayed normally, especially to be connectable with the computer display card, the top priority is to ensure that N762 (DDC chip of DVI port) are well flash written. When picture signal is with HDCP, it is also necessary to ensure that the KEY in HDCP of N760 is well flash written.

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