Hisense LEDN32D20 Service Manual
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Hisense LEDN32D20 Service Manual

Hisense LEDN32D20 Service Manual

Led backlight lcd television
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LED BACKLIGHT LCD TELEVISION
SERVICE MANUAL
Chassis： CVT: TP.VST59.P83
Product type：LEDN32D20
Version: 1.0
Guangdong Hisense Electronics Co., Ltd.
March，2013

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  • Page 1 LED BACKLIGHT LCD TELEVISION SERVICE MANUAL Chassis： CVT: TP.VST59.P83 Product type：LEDN32D20 Version: 1.0 Guangdong Hisense Electronics Co., Ltd. March，2013...

  • Page 2: Table Of Contents

    5.6 Troubleshooting for YPbPr input......................- 20 - 5.7 Troubleshooting for Video input………....................- 21 - 6. Schematic circuit diagram ..........................- 22 - 6.1 Block Diagram............................- 22 - 6.2 Main board power assignment........................- 23 - 7. Explode View..............................- 23 - Hisense Confidential...

  • Page 3: Service Manual

    REPLACEMENT PARTS WHEN SERVICING. USE OF NON-AUTHORIZED PARTS WILL VOID THE MANUFACTURE'S WARRANTY. Proper service and repair are important to the safe, reliable operation of all Hisense Equipments. The service procedures recommended by Hisense and described in this Service Guide are effective methods of performing service operations.
  • Page 4 Otherwise, this can lead to fire. (9) Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over. Hisense Confidential...

  • Page 5: Notes

    The lightning flash with arrowhead symbol, within an equilateral triangle is intended to alert the user to the presence of insinuated dangerous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock. Hisense Confidential...

  • Page 6: Product Function Specifications

    The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the set. 2. Product Function Specifications 2.1 Product Function TV Front Hisense Confidential...

  • Page 7: Specification

    LED BACKLIGHT TV Service Manual TV Rear 2.2 Specification NOTE: Specifications and design are subject to possible modifications without notice Due to improvements。 2.3 Main board layout PCB: RSAG7.820.5048/ROH (LEDN32K300M) 2.3 Main PCB Layout view Hisense Confidential...

  • Page 8: Factory/Service Osd Menu And Adjustment

    Press Menu button and call up User OSD Menu Select Audio-> Balance0 Enter 1->9->6 ->9 in sequence. Note: If necessary, re-do number keys. Factory OSD appears. Press Exit again and leave factory OSD. 3.2 Factory OSD Menu 3.2.1 White Balance Hisense Confidential...

  • Page 9: Designer Menu

    PQ nonlinear setting Color setting Color setting Luma_other Luma_other SETTING Peaking setting Peaking setting NR SETTING NOISE reduction setting CTI SETTING CTI SETTING gamma Gamma setting DLC setting VIP select Backlight Led backlight setting SOUND SOUND MODE SOUND MODE SELECT(SRANDARD/MUSIC/MOVIE/SPORTS/USER) Hisense Confidential...

  • Page 10: Software Upgrading

    PL-2303 Driver Installer.rar cp210x_driver.rar Serial connector: to TV’s port. For the first connecting, the pc will recognize and automatically install the USB device. The process is just like the installation of a mini disk, see the following picture. Hisense Confidential...
  • Page 11 Connect the unit to your pc with a USB-to-serial port cable. USB port connects to your pc, and serial port to the TV’s VGA port. USB Extension cord: Serial port board: B.CNSISP7A 4-Pin connection line: Plug in with VGA port: Hisense Confidential...
  • Page 12 For the first connecting, the pc will recognize and automatically install the USB device. The process is just like the installation of a mini disk, see the following picture. 4.1.3 USB Board Driver After connecting USB connection line to pc and USB board to TV set: Click “ ”, ignoring any question, click “Next” Setup.Exe Hisense Confidential...
  • Page 13 LED BACKLIGHT TV Service Manual Select continue installation Successful installed: Hisense Confidential...

  • Page 14: Upgrading With The Mstartool

    Set ISP Slave Address with “0x92”, Serial Debug Slave Address with “0XB2” in “Config” Page: 4.1.5 double click “ ”, if show ”Device Type”, it shows installation is OK. ISPISP_Tool.exe Note: It should be selected in Red box: Hisense Confidential...
  • Page 15 If shown the picture, it not well installation: Please check: a. whether power on; b. whether USB board connected ok; c. whether connection line matched 4.1.6 upgrading SW file: File name should be” ” bin_v59.bin 4.1.7: switch to Auto page, click “Run” Hisense Confidential...

  • Page 16: Update With Usb Directly

    TV by switching on, put “ bin_v59.bin” file in root dictionary in U disk, Plug in U disk in USB port ,then get in Factory OSD, select “Software update(USB)” , press OK or right in RC,TV will update Hisense Confidential...

  • Page 17: Troubleshooting

    5. Troubleshooting When there is something wrong with you TV, you can try turning off the TV and then restart it. You can also operate according to the following chart. 5.1 Troubleshooting for Remote Control Hisense Confidential...

  • Page 18: Troubleshooting For Function Key

    Try new batteries Replace new batteries Replace RC Replace Remote control Check IR receiver Change Led & IR board ReplaceLED &IR BOARD Change Led & IR CABLE ReplaceLED &IR CABLE Replace main board 5.2 Troubleshooting for Function Key Hisense Confidential...

  • Page 19: Tv Won't Power On

    LED BACKLIGHT TV Service Manual 5.3 TV won’t Power On 5.4 Troubleshooting for Audio Hisense Confidential...

  • Page 20: Troubleshooting For Tv/Vga/Hdmi Input

    LED BACKLIGHT TV Service Manual 5.5 Troubleshooting for TV/VGA/HDMI input 5.6 Troubleshooting for YPbPr input Hisense Confidential...

  • Page 21: Troubleshooting For Video Input

    LED BACKLIGHT TV Service Manual 5.7 Troubleshooting for Video input Hisense Confidential...

  • Page 22: Schematic Circuit Diagram

    6. Schematic circuit diagram 6.1 Block Diagram LVDS (8bit)out SPEAKE HEADPHONE IT6633E-P/C SPEAKE HDMI 1/2/3 TPA3110D2 YPbPr(audio input shared 4MB Flash Main IC with AV IN) TSUMV59 AV input Silicon Tuner RF IN Audio input AV out VGA input Key/IR Hisense Confidential...

  • Page 23: Main Board Power Assignment

    UL41 AVDD-1.8V for U9 5V-M +12V 5V-STB POW-EN UT1 IC AVDD3V for Tuner 3V3-STB for U9 & UF11&UH1 +1.2VDDC for U9 +12V Amplifier +12v +24V +24V LED POWER BL-EN +12V QM12 VCC-Panel for Panel POW-EN 7. Explode View Hisense Confidential...
  • Page 25 100Kohm-0402-±5%-1/16W 0.1uF-0402-Y5V-+80%-20%-16V AIC2857FGR8TR AVDD-2.5V/1.8V 5V-STB 0.01uF-0402-X7R-±10%-50V 5V-M UL41 3V3-STB DRR2W875-22uH 2V5/1V8 3V3_STB NC/SMD5845-4R7M-032 TEST TEST CE17 CL41 CL42 CL43 CL44 + EL44 + EL4 TEST RL41 CC10 5V-STB 5V-STB CL50 NC/10uF-0603-X5R-±20%-6.3V 0.1uF-0402-Y5V-+80%-20%-16V 0.1uF-0402-Y5V-+80%-20%-16V 10uF-0603-X5R-±20%-6.3V RL42 LC1117CLTR33 NC/10uF-0603-X5R-±20%-6.3V NC/100uF-16V-±20%-5× 11-105 - -F=2.5-XF 1uF-0603-Y5V-+80%-20%-16V 0.1uF-0402-Y5V-+80%-20%-16V...
  • Page 26 RK12 5V-STB 3V3-STB 3V3-STB LED-R RK13 LED-R/ 22ohm-0402-± 5%-1/16W LED-G/B 3V3-STB 3V3-STB XTALO RF11 RF14 UF11 RF32 RK30 RK40 QF31 RESET-H 3V3-STB RK31 SPI-CSN CF13 RK32 1Kohm-0402-± 5%-1/16W CF32 RK33 SPI-SDO NC/0.1uF-0402-Y5V-+80%-20%-16V CF31 RF31 XTALI HOLD# RK34 NC/10Kohm-0402-±5%-1/16W RF13 RK35 SPI-WP0N SPI-SCK 4K7ohm-0402-±5%-1/16W...
  • Page 27 SC-ROUT Pb/SC-B Pb/SC-B-IN SC-RIN SC-LOUT 0.047uF-0402-X7R-±10%-16V SCART-VIN SCART-VOUT/ 33ohm-0402-± 5%-1/16W AGND SCART-Rin SCART-Gin SCART-Bin BGND SC-RIN SC-ROUT NC/0ohm-0402-± 5%-1/16W SC-LIN NC/0ohm-0402-± 5%-1/16W SCART-Bin Y/SC-G-SOG SC-LIN SC-LOUT NC/0ohm-0402-± 5%-1/16W SCART- FS SWTCH RS18 CS29 1000pF-0402-X7R-± 10%-50V GGND RS14 RS22 CLKOUT SCART-Gin Y/SC-G Y/SC-G-IN DATA...
  • Page 28 HDMI1-5VIN HDMI1-5VIN RH33 RH31 3V3-STB HDMI1-HOTPLUG/ 10uF-0603-X5R-± 20%-6.3V 0.1uF-0402-Y5V-+80%-20%-16V HDMI1-RX2-P RH32 HPD-CON/ 0.1uF-0402-Y5V-+80%-20%-16V RX2+ HDMI1-DDC-SDA 0.1uF-0402-Y5V-+80%-20%-16V HDMI1-RX2-N HDMI1-DDC-SCL HDMI1-5VIN NC/10Kohm-0402-±5%-1/16W RX2- HDMI1-RX1-P NC/4K7ohm-0402-±5%-1/16W SHELL(GND) RX1+ 10Kohm-0402-±5%-1/16W NC/PMBT3904 HDMI1-RX1-N 10Kohm-0402-±5%-1/16W NC/1Kohm-0402-± 5%-1/16W RX1- HDMI1-RX0-P RPH1 RX0+ HDMI1-RX2-P HDMI-RX2-P SHELL(GND) HDMI1-RX0-N HDMI1-RX2-N HDMI-RX2-N RX0- HDMI1-RXC-P...
  • Page 29 CNA4 CNA3 LSPK ROUT- RSPK LOUT- NC/2PIN-2.54-D-H-G NC/3PIN-2.54-D-H-G AVCC RA34 0.1uF-0402-Y5V-+80%-20%-16V NC/10uF-0805-Y5V-+80%-20%-10V?? 10ohm-0603-±5%-1/10W 1000pF-0402-X7R-±10%-50V 470uF-16V-±20%-8×12-105 33Kohm-0402-±5%-1/16W 5V-M 0.22uF-0402-Y5V-+80%-20%-16V CNA1 0.1uF-0402-Y5V-+80%-20%-16V LOUT+ RA10 LSPK 0.1uF-0402-Y5V-+80%-20%-16V LOUT- RA13 ROUT- ROUT+ RA17 RSPK 1uF-0603-X5R-±10%-25V AMP-STB/ 1uF-0603-X5R-±10%-25V 4PIN-2.54-D-H-G PVCCL 0.22uF-0402-Y5V-+80%-20%-16V NC/0ohm-0603-±5%-1/10W 0.22uF-0402-Y5V-+80%-20%-16V NC/0ohm-0603-±5%-1/10W FAULT PVCCL AMP-LO LINP...
  • Page 30 TUNER-PVCC TUNER-PVCC NC/CDT-3NP5I1-10 R191 R192 C130 R106 C131 C132 IF-AGC IF_AGC DIF2-OUT1 VIFM DIF2-OUT1 IF-AGC/ R108 TAGC IF_P TUNER-SDA/ R193 TUNER-SDA C135 DIF2-OUT2 C152 IF_N TUNER-SCL/ R195 TUNER-SCL C142 C143 Xout DIF2-OUT2 VIFP 10Kohm-0402-±5%-1/16W 30pF-0402-NPO-±5%-50V 100ohm-0402-±5%-1/16W 30pF-0402-NPO-±5%-50V C86 0.047uF-0402-X7R-±10%-16V C128 C129 100ohm-0402-±5%-1/16W C144...
  • Page 31 CYB3 24V/50V CYB4 24V/50V SGND TB1 CORE BL-ON 1000PF SGND 24V/50V CB29 RB73 RB102 RB100 RB57 MOVB1 BDB2 BDB3 RB43 DB313 LCB1 DB13 CB19 RB45 CB25 RB50 MALAY RB77 RB70 RB75 24V/50V RB67 DB314 BDB4 BDB5 RB62 RB97 RB76 CB16 CYB1 CYB2 SGND...
  • Page 32 LED‐TV Service Manual Model:RB‐22S5F Makena Electronic(Shenzhen) CO,LTD http://www.makenachina.com...
  • Page 33 Contents Contents — ——————————————2 Contents   Safety precautions————————————3 Maintenance tools——————— —— ——4 Size and composition ——————————5 Size and composition    Simple failure & solve  ——————————6 Maintenance flow chart  —————————7...

  • Page 34: Safety Precautions

    Safety precautions Warning: To prevent fire or shock, please don't place TV on a fog places. Don't Scratch and striking panel surface with hard things. Note： 1，This product directly use AC power supply. Please refer  to  the  rating label  about power supply voltage. 2，Please pull out   power  supply and antenna signal  In the weather of  Lightning storm  or abnormal AC power supply. 3，please don't put the television to the extreme heat, wet or much dust place,  ensure good television. Good air convection. 4，TV screen belong to precision components, and the screen above have  the  individual window, the dark spots or red Green, blue, a little dead pixels, this is normal  phenomenon, do not belong to bad product. 5， LCD screen normal working temperature is 0‐40 ℃, too high or low may affect TV Machine working normally.
  • Page 35 Repairing tools Soldering iron , multimeter , oscilloscope  ,screwdriver , pliers ,Forceps , suction tin...

  • Page 36: Specification

    Specification Specification Screen size: 22”(55CM) Screen Ratio: 1920*1080 Power supply: DC  12V  3A,  50/60HZ Digital TV video  system : N/A Output Power:36W Digital TV  sound system:   AC‐3 Analog TV video system : PAL/SECAM Standby:〈 0.5W Analog TV sound system : D/K,B/G Brightness: 220cd/㎡ Contrast:1000:1 M/B: MSTV59...

  • Page 37: Symptoms And Solutions

    Symptoms & Solutions Symptoms & Solutions Symptom Check contents Power AC is connected well？ No power no images &silent Is standby？ TV is turned on？ Check the brightness is set too small？ Whether input port have signal？ No picture Is there any problem on display Check  it’s the silent state？ Check the headset is connected？ Picture &silent Check the sound settings and sound system？ AV output port settings are correct？ Check the brightness and color  set normal  ？ Image too bright or too dark Check the screen is normal？ Check the validity of the remote control batteries？ Check the remote control is normal? Remote no effect Check the input signal is too weak? Antenna is connected properly？ Antenna is connected properly？ Image is not clear shaking Image is not clear ,shaking Input power is unstable？...
  • Page 38 Repairing flow chart Repairing flow chart 1, Flow chart for no LED light Power No LED light power Press power key Please connect AC power and  Check power supply confirm AC 100‐240V confirm AC 100 240V Check power board Check &replace 12V/5V 12V/5V power board Check &replace...
  • Page 39 2, Flow chart for white screen White screen Check one signal Check input source source Check &replace Check LVDS wire LVDS wire Check &replace Check Panel Check Panel Panel Ch k & Check &replace...
  • Page 40 3, Flow chart for PC in no picture PC in no picture Check VGA wire Check VGA wire Replace VGA wire Replace VGA wire Open the cover Upgrade software Check &replace...
  • Page 41 4, Flow chart for TV no picture TV no picture Check PC in normal Check antenna Check &replace connected signal input wire Check &replace TV Check TV tuner Check TV tuner tuner Check &replace Check &replace...
  • Page 42 5, Flow chart for TV no audio TV no audio Check image is normal? Check Earphone Check Earphone normal? Speaker cable is connected Insert speaker well in main board? cables again Check speakers Check speakers Check &replace...
  • Page 43 6, Flow chart for no power NO power Check power Check power supply 100-240v supply Check M/B Check M/B Check adapter 12V/5V? Upgrade software Check &replace...
  • Page 44 7, Flow chart for No panel backlight No backlight Check backlight cables are  Insert backlight connected well with M/B & Panel? ll ith M/B & P again Replace backlight Replace backlight  Check backlight Check backlight cables cables are ok? Replace converter  Check the converter board board Check Panel Check  panel Check &replace...
  • Page 45 8. Flow chart for problem with key board& OSD No function with  button& OSD button& OSD Check the key board Check the key board Replace key board Replace key board Check button cable is connected well Check button cable is connected well  Insert button cable with M/B& keyboard ? Check button cable Replace button cable Check &replace...
  • Page 46 9, Flow chart for remote control No function with remote control Check IR board Check IR cable is connected Check IR cable is connected Replace IR board well with M/B &IR board? Check IR cable Reinsert IR cable Check Panel Replace IR cable Check &replace...
  • Page 47 LED‐TV Service Manual Model:RB‐32D5 Makena Electronic(Shenzhen) CO,LTD http://www.makenachina.com...
  • Page 48 Contents Contents — ——————————————2 Contents   Safety precautions————————————3 Maintenance tools——————— —— ——4 Size and composition ——————————5 Size and composition    Simple failure & solve  ——————————6 Maintenance flow chart  —————————7...

  • Page 49: Safety Precautions

    Safety precautions Warning: To prevent fire or shock, please don't place TV on a fog places. Don't Scratch and striking panel surface with hard things. Note： 1，This product directly use AC power supply. Please refer  to  the  rating label  about power supply voltage. 2，Please pull out   power  supply and antenna signal  In the weather of  Lightning storm  or abnormal AC power supply. 3，please don't put the television to the extreme heat, wet or much dust place,  ensure good television. Good air convection. 4，TV screen belong to precision components, and the screen above have  the  individual window, the dark spots or red Green, blue, a little dead pixels, this is normal  phenomenon, do not belong to bad product. 5， LCD screen normal working temperature is 0‐40 ℃, too high or low may affect TV Machine working normally.
  • Page 50 Repairing tools Soldering iron , multimeter , oscilloscope  ,screwdriver , pliers ,Forceps , suction tin...

  • Page 51: Specification

    Specification Specification Screen size: 32”(80CM) Screen Ratio: 1366*768 Power supply: AC ～100‐242V,  50/60Hz Digital TV video  system : N/A Output Power:65W Digital TV  sound system:   AC‐3 Analog TV video system : PAL/SECAM Standby:〈 1W Analog TV sound system : D/K,B/G Brightness: 250cd/㎡ Contrast:3000:1 M/B: MSTV59...

  • Page 52: Symptoms And Solutions

    Symptoms & Solutions Symptoms & Solutions Symptom Check contents Power AC is connected well？ No power no images &silent Is standby？ TV is turned on？ Check the brightness is set too small？ Whether input port have signal？ No picture Is there any problem on display Check  it’s the silent state？ Check the headset is connected？ Picture &silent Check the sound settings and sound system？ AV output port settings are correct？ Check the brightness and color  set normal  ？ Image too bright or too dark Check the screen is normal？ Check the validity of the remote control batteries？ Check the remote control is normal? Remote no effect Check the input signal is too weak? Antenna is connected properly？ Antenna is connected properly？ Image is not clear shaking Image is not clear ,shaking Input power is unstable？...
  • Page 53 Repairing flow chart Repairing flow chart 1, Flow chart for no LED light Power No LED light power Press power key Please connect AC power and  Check power supply confirm AC 100‐240V confirm AC 100 240V Check power board Check &replace 12V/5V 12V/5V power board Check &replace...
  • Page 54 2, Flow chart for white screen White screen Check one signal Check input source source Check &replace Check LVDS wire LVDS wire Check &replace Check Panel Check Panel Panel Ch k & Check &replace...
  • Page 55 3, Flow chart for PC in no picture PC in no picture Check VGA wire Check VGA wire Replace VGA wire Replace VGA wire Open the cover Upgrade software Check &replace...
  • Page 56 4, Flow chart for TV no picture TV no picture Check PC in normal Check antenna Check &replace connected signal input wire Check &replace TV Check TV tuner Check TV tuner tuner Check &replace Check &replace...
  • Page 57 5, Flow chart for TV no audio TV no audio Check image is normal? Check Earphone Check Earphone normal? Speaker cable is connected Insert speaker well in main board? cables again Check speakers Check speakers Check &replace...
  • Page 58 6, Flow chart for no power NO power Check power Check power supply 100-240v supply Check M/B Check M/B Check adapter 12V/5V? Upgrade software Check &replace...
  • Page 59 7, Flow chart for No panel backlight No backlight Check backlight cables are  Insert backlight connected well with M/B & Panel? ll ith M/B & P again Replace backlight Replace backlight  Check backlight Check backlight cables cables are ok? Replace converter  Check the converter board board Check Panel Check  panel Check &replace...
  • Page 60 8. Flow chart for problem with key board& OSD No function with  button& OSD button& OSD Check the key board Check the key board Replace key board Replace key board Check button cable is connected well Check button cable is connected well  Insert button cable with M/B& keyboard ? Check button cable Replace button cable Check &replace...
  • Page 61 9, Flow chart for remote control No function with remote control Check IR board Check IR cable is connected Check IR cable is connected Replace IR board well with M/B &IR board? Check IR cable Reinsert IR cable Check Panel Replace IR cable Check &replace...
  • Page 62 LED‐TV Service Manual Model:RB‐39D5F Makena Electronic(Shenzhen) CO,LTD http://www.makenachina.com...
  • Page 63 Contents Contents — ——————————————2 Contents   Safety precautions————————————3 Maintenance tools——————— —— ——4 Size and composition ——————————5 Size and composition    Simple failure & solve  ——————————6 Maintenance flow chart  —————————7...
  • Page 64 Safety precautions Warning: To prevent fire or shock, please don't place TV on a fog places. Don't Scratch and striking panel surface with hard things. Note： 1，This product directly use AC power supply. Please refer  to  the  rating label  about power supply voltage. 2，Please pull out   power  supply and antenna signal  In the weather of  Lightning storm  or abnormal AC power supply. 3，please don't put the television to the extreme heat, wet or much dust place,  ensure good television. Good air convection. 4，TV screen belong to precision components, and the screen above have  the  individual window, the dark spots or red Green, blue, a little dead pixels, this is normal  phenomenon, do not belong to bad product. 5， LCD screen normal working temperature is 0‐40 ℃, too high or low may affect TV Machine working normally.
  • Page 65 Repairing tools Soldering iron , multimeter , oscilloscope  ,screwdriver , pliers ,Forceps , suction tin...
  • Page 66 Specification Specification Screen size: 39”(98CM) Screen Ratio: 1920*1080 Power supply: AC ～100‐242V,  50/60Hz Digital TV video  system : N/A Output Power:75W Digital TV  sound system:   AC‐3 Analog TV video system : PAL/SECAM Standby:〈 1W Analog TV sound system : D/K,B/G Brightness: 270cd/㎡ Contrast:3000:1 M/B: MSTV59...
  • Page 67 Symptoms & Solutions Symptoms & Solutions Symptom Check contents Power AC is connected well？ No power no images &silent Is standby？ TV is turned on？ Check the brightness is set too small？ Whether input port have signal？ No picture Is there any problem on display Check  it’s the silent state？ Check the headset is connected？ Picture &silent Check the sound settings and sound system？ AV output port settings are correct？ Check the brightness and color  set normal  ？ Image too bright or too dark Check the screen is normal？ Check the validity of the remote control batteries？ Check the remote control is normal? Remote no effect Check the input signal is too weak? Antenna is connected properly？ Antenna is connected properly？ Image is not clear shaking Image is not clear ,shaking Input power is unstable？...
  • Page 68 Repairing flow chart Repairing flow chart 1, Flow chart for no LED light Power No LED light power Press power key Please connect AC power and  Check power supply confirm AC 100‐240V confirm AC 100 240V Check power board Check &replace 12V/5V 12V/5V power board Check &replace...
  • Page 69 2, Flow chart for white screen White screen Check one signal Check input source source Check &replace Check LVDS wire LVDS wire Check &replace Check Panel Check Panel Panel Ch k & Check &replace...
  • Page 70 3, Flow chart for PC in no picture PC in no picture Check VGA wire Check VGA wire Replace VGA wire Replace VGA wire Open the cover Upgrade software Check &replace...
  • Page 71 4, Flow chart for TV no picture TV no picture Check PC in normal Check antenna Check &replace connected signal input wire Check &replace TV Check TV tuner Check TV tuner tuner Check &replace Check &replace...
  • Page 72 5, Flow chart for TV no audio TV no audio Check image is normal? Check Earphone Check Earphone normal? Speaker cable is connected Insert speaker well in main board? cables again Check speakers Check speakers Check &replace...
  • Page 73 6, Flow chart for no power NO power Check power Check power supply 100-240v supply Check M/B Check M/B Check adapter 12V/5V? Upgrade software Check &replace...
  • Page 74 7, Flow chart for No panel backlight No backlight Check backlight cables are  Insert backlight connected well with M/B & Panel? ll ith M/B & P again Replace backlight Replace backlight  Check backlight Check backlight cables cables are ok? Replace converter  Check the converter board board Check Panel Check  panel Check &replace...
  • Page 75 8. Flow chart for problem with key board& OSD No function with  button& OSD button& OSD Check the key board Check the key board Replace key board Replace key board Check button cable is connected well Check button cable is connected well  Insert button cable with M/B& keyboard ? Check button cable Replace button cable Check &replace...
  • Page 76 9, Flow chart for remote control No function with remote control Check IR board Check IR cable is connected Check IR cable is connected Replace IR board well with M/B &IR board? Check IR cable Reinsert IR cable Check Panel Replace IR cable Check &replace...
  • Page 77 LS0D_322500_MSTV59 Circuit_V1.0(JUG7.820.1408) +VDD3V HOLE TUNER Power Test Point R020 R020 BPF_IN POWER INPUT PANEL POWER AV1 Input TAGC R021 10K R021 10K C033 C033 0.1u 0.1u CON001 CON001 AV1-V AV1-V R301 R301 AV1-Vin+ 靠近主IC R812 CBW2012U121T/NC R812 CBW2012U121T/NC IEC FEMALE IEC FEMALE BPF 38.9MHz: 3th Order 600mA...

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