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Toshiba 32L310U20 Service Manual
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Toshiba 32L310U20 Service Manual

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Be sure to read this manual before servicing. To ensure safety from fire, electric shock, injury, harmful
radiation and materials, various measures are provided in this LCD Television.
Be sure to read cautionary items described in the manual before servicing.
These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric
shock, do not perform any servicing other than that described in the operating instructions unless you are
qualified to do so.
1. Since the Panel Module and the front Filter are made of glass, handling the broken Module and Filter
carefully and with caution in order not to receive injury.
2. Replacement work should be started after the Panel Module and the AC/DC Power supply have become
sufficiently cool.
3. Special care should be taken when working near the display area in order not to damage its surface.
4. The Panel Module should not be touched with bare hands in order to protect its surface from blemishes
and damage.
5. It is recommended that you use clean soft gloves during the replacement work in order to protect not only
the display area of the Panel Module but also yourself.
1. Features .......................................................... 4
2. Specifications .................................................. 5
3. Component names .......................................... 11
4. Service points ............................................... 13
5. Adjustment .................................................... 14
6. Troubleshooting ............................................ 39
7. Attachments..........................................48
8.Exploded view........................................48
32L310U20 Service manual
Caution
Service Warning
Contents
LCD Television
1

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Summary of Contents for Toshiba 32L310U20

  • Page 1: Table Of Contents

    32L310U20 Service manual Caution Be sure to read this manual before servicing. To ensure safety from fire, electric shock, injury, harmful radiation and materials, various measures are provided in this LCD Television. Be sure to read cautionary items described in the manual before servicing.
  • Page 2 Revison History: Rev. Date Changed Content Name Note...
  • Page 3 CAUTION FOR SAFETY Please read this page before repair the monitor. The following safety precautions are designed to help you stay safe and prevent accidents during the repair work. Please take note of these cautionary flags.  This means "Potential to sustain injury or even death." Warning This means "Potential to sustain breakage or irreparable damage."...

  • Page 4: Features

    PRECAUTIONS Cleaning the LCD panel of the television  Please make sure to unplug the power cord before cleaning the television. ● Wipe the panel with a lint-free and dry cloth in order to prevent damage to the panel surface. ●...

  • Page 5: Specifications

    2. Models Specification MODEL NAME 32" HD TOSHIBA NAME 32L220U20 Biz. Term -1 Delivery Term FOB China -2 Shipping Style -3 Currency USA/Canada/Mexico Category ATSC IP Essential IP requirement MP target Apr', 2019 Shape and stuff Dimension(W x H x with stand 7373X48.1X20.2 CM...
  • Page 6 Plastic ABS 94HB -5 Stand base Plastic ABS 94HB TOP:HIPS 94V-0 ,Bottom:HIPS -6 Back cover Plastic 9HB75 -7 Number of control keys -8 LED Indicator Red/Green Wall mount (Vesa 100 x 100(mm) Dimensions) Vesa Screw Size (32"and below:M4; Above 32": M6; If M4X12 (MM) 100lbs or more M8 (no M5))
  • Page 7 Diagonal Screen Size 31.5" (inches) -10 Pixel Pitch (mm) 0.17025x0.51075 Brightness (cd/ ㎡ ) should be measured (min/typ)Brightness under color (cd/ ㎡ ) temperature (min/typ)Brightness 180/220 x=280,y=288(natural) (cd/ ㎡ ) and reach brightness (min/typ)Brightness spec. (cd/ ㎡ ) (min/typ) Color chromaticity White x,y Wx:0.280, Wy:0.290 Contrast Ratio...
  • Page 8 LAN (10/100Mbps) USB (Total QTY)/USB-IF approve 1( USB ID number is 60001218) part(should provide TID number) Control RS-232C Service Port Program update Receiving Signals -1 Built-in Tuners Composition Digital & Analog (1) ATSC 8VSB CABLE 64/256QAM (135ch) Analog NTSC-M System / Number of FS/191ch Position ATSC,...
  • Page 9 HE-AAC Layer I (For Mexico) Version II/IV HE-AAC Layer II (For Mexico) Version II/IV Audio Encored/Transcorder Dolby Digital (output) NTSC -6 Composite Video 480i (60Hz) 480i (60Hz) / 576i -7 HDMI AV format yes / --- (50Hz) 480p (60Hz) / 576p yes / --- (50Hz) 720p...
  • Page 10 WXGA (1280x768) 60Hz WXGA (1360x768) 60Hz SXGA (1280 x 1024) 60Hz Audio format L-PCM / AC3 yes / yes ARC (Audio Return Ver 1.4 Yes (HDMI-1 only) Channel) CEC unified 0.9 HDMI CEC Player Root Menu Control Contents Menu Setup Menu Top Menu Menu Information of...

  • Page 11: Component Names

    3. Components name...

  • Page 13: Service Points

    4.Service Points Lead-free solder  This product uses lead-free solder (unleaded) to help protect the environment. Please read these instructions before attempting any soldering work. Caution: Always wear safety glasses to prevent fumes or molten solder from getting into the eyes. Lead-free solder can splatter at high temperatures (600℃). Lead-free solder indicator ...

  • Page 14: Adjustment

    5. Adjustments 5.1 FACTORY MAIN MENU 0） Hotkey enable setting 1） System initialization, for the Machine factory reset 2） Loop the test screen 3） ADC Autocolor (Detail -> 2) 4） Setting about picture（Detail -> 3） 5） Setting about sound（Detail -> 4） 6）...
  • Page 15 5.2 ADC ADJUST ADC Autocolor Adjust ADC Autocolor Adjust,Corrects the conversion error due to ADC discretisation and board component discretization.Divided into YPbPr VGA SCART-RGB.Adjustments are included R Gain,G Gain,B Gain,R Offset,G Offset,B Offset.
  • Page 16 5.3 PICTURE SETTING 0） Source selection 1） The mode of picture（Detail -> 3.1） 2） Picture Curve settings（Detail -> 2.2） 3） WB Adjust settings（Detail -> 2.3） 4） Overscan settings 5） PQ adjust settings 6） Gamma selection 7） DLC selection 8） HDMI RGB Range setting 9）...
  • Page 17 5.3.1 PICTURE MODE 0） Source selection 1） Picture mode selection 2） Contrast adjust 3） Brightnesst adjust 4） Colour adjust 5） Sharpness adjust 6） Tint adjust 7） WB mode selection 8） WB R gain adjust 9） WB G gain adjust 10）WB B gain adjust 11）WB reset item...
  • Page 18 5.3.2 PICTURE CURVE 0） Source selection 1） Contrast adjust 2） Brightnesst adjust 3） Colour adjust 4） Sharpness adjust 5） Tint adjust See detail 3.2.1...
  • Page 19 5.3.2.1Contrast 1） the value what contrast is 0 2） the value what contrast is 25 3） the value what contrast is 50 4） the value what contrast is 75 5） the value what contrast is 100 Other Options are the same as it...
  • Page 20 5.3.3 WB ADJUST WB ADJUST Current channel white balance adjustment.Divided into Warm Cool Normal,And the channel is saved.Adjustments are included R Gain G Gain B Gain R Offset G Offset B Offset SYNC ALL RESET WB.
  • Page 21 5.3.4 OVERSCAN OVERSCAN Adjust 0）Current signal resolution 1）Left margin adjustment 2）Right margin adjustment 3）Up margin adjustment 4）Down margin adjustment...
  • Page 22 5.3.5 PQ ADVANCED PQ Adjust Adjustments are included VIP NR QMAP etc.
  • Page 23 5.4 SOUND SETTING 0） Source selection 1） Sound mode parameters settings 2） Volume curve settings 3） Audio prescale setting,match all of source to same speaker output level 4） Auto volume control page 5） Equalizer adjustment 6） SRS/DTS parameters settings 7） Dialog clarity setting 8）...
  • Page 24 5.4.1 SOUND MODE 0) Source selection 1) Sound mode selection 2) Treble adjustment 3) Bass adjustment...
  • Page 25 5.4.2 VOLUME CURVE Precautions: 0 ) Source selection 1 ） Volume Offset You can set one for each channel,The user generally controls the volume level 2 ~ 12 ） All channels share a common set of data,When adjusting, be sure to ensure that the value after the front must be larger than the value.Such as:VOL70 must bigger than VOL60.
  • Page 26 5.5 GENERAL SETTING 0） On/Standby/Last Power state. 1） LOGO ON/OFF adjustments 2） Test Screen,Determine the screen problem 3） Channel table import and export 4） Watchdog switch 5） Clear the user data area in the flash 6） Clock acceleration settings for easy testing...
  • Page 27 5.6 DEBUG 0） UART mode selection 1） Serial Print Switch 2 ~ 5）Domestic machine requirements, other areas optional, for non-standard RF signal debugging 6）Used to debug keypad, remote control to receive problems 7 ） NFC function switch control for analog TV channels, easy to debug ATV field problems 8）DVB scheme must be added 9）Adjust the HDMI receiver Equalizer parameter...
  • Page 28 5.7 PANEL SETTING 0）Panel preset selection 1）Panel colour bit deep setting 2）LVDS map mode selection 3）LVDS data channel swap control 4）LVDS data level adjustment 5）LVDS clock level adjustment 6）PWM frequency setting 7）The step of pwm frequency adjustment 8）Backlight adjustment 9）PWM REF adjustment 10）Panel normal/mirror control...
  • Page 29 5.8 EMC SETTING（For Pass Certification） 0 ~ 2） DDR spread settings 3 ~ 5 ) LVDS spread settings...
  • Page 30 5.9 SYSTEM INFO...
  • Page 31 5.10 SW UPGRADE 0） Upgrade item 1）The required upgrade file name...
  • Page 32 5.11 Upgrading Instruction Software upgrades are mainly to update the software features and solve software defects, this article will introduce three upgrade methods. 5.12 USB Automatic Identification Upgrade 5.12.1 Upgrade Preparation Please prepare a USB, and put into a correct software upgrade program in the USB root directory，...
  • Page 33 C:When progress up to 100%, the upgrade successful menu will display, then remove the USB and restart the TV by AC off/on, the upgrade is completed. 5.13 CVTE Factory Menu Upgrade 5.13.1 Upgrade Preparation Upgrade preparation same as USB Automatic Identification Upgrade. 5.13.2 Start Upgrade A:Use the prepared USB connect to the TV USB port, and then press the remote control MENU key to diplay the main menu, continuous press the number keys 1 + 1 +...
  • Page 34 B:Into the SW UPGRADE page, you can see BIN NAME will identify the upgradesoftware named 32L310U20__01.00.00.bin, select UPGRADE TV will enter the upgrade state, If identified as the same software, will prompt Same Image! After entry the upgrade state, the menu will show the corresponding progress, and the LED lights will be 1 second interval alternately flashing, after the upgrade success，...
  • Page 36 5.14 The electricity upgrade 5.14.1 Preparation A: Prepare mini power board(PW.SY18) for upgrading. B:Connect the mini board with main board as below: There is a 10 pin power port on the board(the middle 2 pins of the power port are 12V PVCC pins, but the corresponding pins in the mini board is 5V pins, so it is needed to connect at least one 12V PVCC pin in the TV board to 12V pin in the mini power board).
  • Page 37 C: 2PIN upgrading interface (GND, 12V), Connect it as the picture below: *Warning:Make sure connect the 12V to 12V and GND to GND, or it will cause hardware damage. Why use the CN.UPGRADE01 board? We use this board to protect the safety of personnel and equipment as much as possible ...
  • Page 38 Red 250ms Green 250ms alternates, flashing before power off. Main program upgrade Failed: Red 1750ms Green 250ms alternates，flashing before power off. Notes: In the upgrade process, as timer software is used to control flashing, situations such as LED light stuck when creating partition of flash, is normal phenomenon. B、Power On Upgrading STEP 1：Copy the Upgrading File (SW) to a USB disk .

  • Page 39: Troubleshooting

    6. Trouble shooting  6‐1 Terms:   IR: Infrared Receiver   RC: Remote Control   IR logic: IR blink with RC action   LVDS:  Low  Voltage  Differential  Signal,  output  from  processor  and  input for panel   O/C: Open Cell, panel with source board   BL: Back Light, light source for panel module   LB: LED (Light Emitting Diode) Bar, light source for BL module   VBL: Voltage for Back Light (before Boost)   VLED: Voltage for LED (after Boost)   OVP: Over Voltage Protection   OSD: On Screen Display   AMP: Amplifier     ...
  • Page 40 6‐2 No power    No power LED, RC or Key can not turn on TV. Power LED  no light/no change.    Power Supply Trouble 1...
  • Page 41 Power supply for LED drive...
  • Page 42 6‐3 No Display / Black Panel  Back light is OK, sound is OK, but no picture.    Display Trouble（exceptional screen）...
  • Page 43 Display Trouble （white screen）...
  • Page 44 6‐4 No back light  Power LED logic OK, sound OK, but no picture.(Different  from No Display).   ...
  • Page 45 6‐5 No sound  One or all signal source without sound .    Audio Trouble（No sound)
  • Page 46 6‐6 Signal source no function  One or several source no function.    Function Trouble（TV video）...
  • Page 47 Function Trouble（SCART、HDMI、YPbPr、CVBS）...

  • Page 48: Attachments

    7. Attachments Please refer to the attachments 8.Exploded view Please refer to the attachments...
  • Page 49 3V3_STB SYSTEM FUNCTION BLOCK DIAGRAM PIN52 M_SCL M_I2C PIN51 M_SDA Si2159 LVDS MSD3553 Add_R 0xC1 Add_R Add_W 0xC0 Add_W LVDS FLASH DDR3 Main Board Power Tree TAS5707 128MB USB 2.0 MSD3553 2500mA + Panel Current 950mA(eff=90%) 230mA 5V_STB 5V_STB 5V_M 950mA VCC_DDR MSD3553...
  • Page 52 Model Number Range Date Value Dimensions Panel Panel (Mfg Panel PN): T-Con (if available as a separate Board part) Board Power Board 9011-24003C- 185*110*12 32L310U20 32L86F-FATSC 00001-23940 Rev.A 03/15/2019 Board $14.8 P7201011 Main Board 9015-11206F- 37.5*23.5* $0.67 01011021 1.2mm Board...
  • Page 53 POWER 电容 470pF,400VAC 20ohm CYB3 RB127 68ohm RB130 RB124 68ohm SGND CB118 RB125 68ohm RB150 RB126 68ohm 1KV,1000pF 20ohm EB1底部 TB101 10A,150V,HBR10150SS Vrms=380 SYEQ2612-T004 RB131 硅胶 ,0.5g, 通用 ,60, 白色 Vbridge 2Kohm RB136 15Kohm 630V,4700pF HSB3 HSB2 RB135 3Kohm 电容 470pF,400VAC TP-TDT DB102...
  • Page 54 POWER 电容 470pF,400VAC 20ohm CYB3 RB127 68ohm RB130 RB124 68ohm SGND CB118 RB125 68ohm RB150 RB126 68ohm 1KV,1000pF 20ohm EB1底部 TB101 10A,150V,HBR10150SS Vrms=380 SYEQ2612-T004 RB131 硅胶 ,0.5g, 通用 ,60, 白色 Vbridge 2Kohm RB136 15Kohm 630V,4700pF HSB3 HSB2 RB135 3Kohm 电容 470pF,400VAC TP-TDT DB102...
  • Page 55 短路 BL_EN BL_ON PWM/ADJ PWM_DIM 功率电感 ,Power Inductor,4.7uH,±20%,2.8A,0.35×1P,DR5.8×4.5,SMD,CD54-4.7uH,wenshan 0ohm-0402-±5%-1/16W 0.1uF-0402-X5R-±20%-16V NC/0ohm-0402-PCB 1000pF-0402-X7R-±10%-50V NC/1000pF-0402-X7R-±10%-50V 470ohm-0402-±5%-1/16W 4K7ohm-0402-±5%-1/16W 5V_STB 5V_STB TEST CD17 CD12 CD13 CD14 CD15 VCC_DDR CD16 CL12 CL13 CL14 TEST VCC_DDR NC/0.1uF-0402-X5R-±20%-16V GND/ADJ VOUT1 NC/10uF-1206-X5R-±10%-16V 10uF-0805-X5R-±20%-16V 5V_M VIN1 VOUT1 VCC_DDR NC/0.1uF-0402-X5R-±20%-16V TEST 10uF-0805-X5R-±20%-16V 5V_STB...
  • Page 56 1.15V_STB 1.15V_STB 1.15V_STB 1uF-0603-X5R-±10%-25V 1uF-0603-X5R-±10%-25V 1uF-0603-X5R-±10%-25V 0.1uF-0402-X5R-±20%-16V 0.1uF-0402-X5R-±20%-16V 0.1uF-0402-X5R-±20%-16V HDMI2_RX0_N UART_RX RX0N_B DDCA_CK HDMI2_RX0_P UART_TX RX0P_B DDCA_DA HDMI2_RX1_N SPI_CSN RX1N_B SPI_CZ HDMI2_RX1_P SPI_SDO VCC_DDR RX1P_B SPI_DO HDMI2_RX2_N SPI_SCK RX2N_B SPI_CLK HDMI2_RX2_P SPI_SDI RX2P_B SPI_DI 1uF-0603-X5R-±10%-25V 3V3_STB AVDD_MOD VDDC 1.15V_STB HDMI3_RXC_N RESET_H 0.1uF-0402-X5R-±20%-16V RXCN_A...
  • Page 57 VCC_Panel 3V3_STB VCC_Panel VCC_Panel LED_R 0.1uF-0402-X5R-±20%-16V VCC_Panel 3V3_STB NC/NC/? NC/100ohm-0402-±5%-1/16W LED_R LED_RED RK20 LED_RED RK13 CK10 RK15 NC/10Kohm-0402-±5%-1/16W RXE0_N NC/4K7ohm-0402-±5%-1/16W RXE0_P NC/LMBT3904LT1G RXE1_N RXE1_P RXE2_N 0.1uF-0402-X5R-±20%-16V RXE2_P 470ohm-0402-±5%-1/16W NC/4K7ohm-0402-±5%-1/16W RXEC_N RXEC_P RXE3_N 3V3_STB RXE3_P RXEC_N CN10 RXEC_P CN16 KEY TEST 3V3_STB 3V3_IR 3V3_IR TEST...
  • Page 58 HDMI2_5V CH14 RH14 HDMI_CEC HDMI_ARC CH25 CH10 RH43 100ohm-0402-±5%-1/16W NC/22pF-0402-NPO-±5%-50V 1uF-0603-X5R-±10%-25V NC/22pF-0402-NPO-±5%-50V NC/AVLC18S02003 HDMI2_RX2_P HDMI2_HPD NC/AVLC18S02003 RX2+ HDMI2_RX2_N RX2- HDMI2_RX1_P RPH2 RX1+ HOTPLUG2 HDMI2_RX1_N RX1- HDMI2_RX0_P HDMI2_SDA/ HDMI2_DET HDMI3_DET RX0+ HDMI2_SCL/ 15Kohm-0402-±1%-1/16W HDMI2_RX0_N 15Kohm-0402-±1%-1/16W RX0- RH55 HDMI2_RXC_P RXC+ HDMI2_RXC_N LMBT3904LT1G RXC- 1Kohm-0402-±1%-1/16W 排阻...
  • Page 59 AV20 5V_USB2.0 5V_USB2.0 5V_M 短路 USB0_DM USB0_DM_IC 短路 USB0_DP USB0_DP_IC NC/AIES12U020R2 NC/NSMD110(1206-1.1A) NC/AIES12U020R2 0ohm-0402-±5%-1/16W NC/0ohm-0402-PCB 10uF-0603-X5R-±20%-6.3V NC/0ohm-0402-PCB 端子 ,USB Jack,USB2.0,H,Single,White,flange,Block up,DIP,USB-A1D05F-0B4N,CZT TEST 5V_USB2.0 TEST USB0_DM TEST USB0_DP OPTICAL 5V_M SPDIF_OUT/ TEST COAX 220ohm-0402-±5%-1/16W IR Transmitter CF51 COAX SPDIF_OUT/ SPDIF_OUT COAX COAX TEST RF51...
  • Page 60 3V3_M 3V3_Tun 1uF-0603-X5R-±10%-25V 1000pF-0402-X7R-±10%-50V 3V3_Tun NC/0.1uF-0402-X5R-±20%-16V 0.1uF-0402-X5R-±20%-16V NC/10uF-0603-X5R-±20%-6.3V NC/10uF-0603-X5R-±20%-6.3V 1000pF-0402-X7R-±10%-50V 0.1uF-0402-X5R-±20%-16V 0.1uF-0402-X5R-±20%-16V 1000pF-0402-X7R-±10%-50V 0ohm-0402-±5%-1/16W 10uF-0603-X5R-±20%-6.3V 1000pF-0402-X7R-±10%-50V CT17 NC/AVLC18S02003 CT15 CT19 CT20 CT16 1000pF-0402-X7R-±10%-50V 3V3_STB 4K7ohm-0402-±5%-1/16W SDCL1005CR33JTDF 4K7ohm-0402-±5%-1/16W 0ohm-0402-±5%-1/16W 100ohm-0402-±5%-1/16W 100ohm-0402-±5%-1/16W 0ohm-0402-±5%-1/16W 30pF-0402-NPO-±5%-50V SDCL1005CR33JTDF 30pF-0402-NPO-±5%-50V RT16 1000pF-0402-X7R-±10%-50V TUNER_SDA M_SDA RF_REF RT17 TUNER_SCL M_SCL CT25...
  • Page 61 AUMCK_OUT RA33 I2S_MCK +3.3V_AMP 3V3_M +3.3V_AMP AUWS_OUT RA36 I2S_LRCLK AUBCK_OUT RA37 I2S_BCK RA34 AUSD_OUT RA39 I2S_SD CA48 CA49 CA29 CA37 RA35 AMP_RESET AMP_RESET/ RA38 AMP_STB AMP_PDN 22ohm-0402-±5%-1/16W CA31 RA46 22ohm-0402-±5%-1/16W 22ohm-0402-±5%-1/16W 4K7ohm-0402-±5%-1/16W 磁珠 30pF-0402-NPO-±5%-50V 1Kohm-0402-±5%-1/16W ,BEAD,120ohm,0402,500mA,SMD,TP,FCM1005KF-121T06,Tai-tech NC/AVLC18S02003 0.1uF-0402-X5R-±20%-16V 4K7ohm-0402-±5%-1/16W 10uF-0603-X5R-±20%-6.3V NC/AVLC18S02003 4K7ohm-0402-±5%-1/16W 0.1uF-0402-X5R-±20%-16V...
  • Page 62 3V3_STB RA16 HP_DET/ HP_DET CI11 LINE_OUT_L AMP-LO CA39 10Kohm-0402-±5%-1/16W CI12 10Kohm-0402-±5%-1/16W LINE_OUT_R AMP-RO 1uF-0603-X5R-±10%-25V CI13 CI14 RI17 RI18 HP_R LINE_OUTR TEST HP_DET/ HP_L TEST LINE_OUTL 1uF-0603-X5R-±10%-25V 1uF-0603-X5R-±10%-25V NC/1000pF-0402-X7R-±10%-50V NC/1000pF-0402-X7R-±10%-50V RA15 RA21 NC/200Kohm-0402-±5%-1/16W NC/200Kohm-0402-±5%-1/16W 1Kohm-0402-±1%-1/16W 1Kohm-0402-±1%-1/16W 耳机端子 ,Earphone Jack,H,Φ3.5,CH7.0,Black,switch,Seal,DIP,PJ7724-F05L3BY-D,YUQIU LINE_OUTL RI21 LINE_OUT_L HP_DET/ DI10...
  • Page 67 32L310U20/3MS553B0 Wiring Diagram FOR POWER 3MS553B0- 3IN1 MSD3553 ZUC-007S...
  • Page 68 LIGHTBAR POWER IR&LED&KEY BD 32'' OPEN CELL SPEAKER SPEAKER...