Hisense LCD42V68PAM Service Manual
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Hisense LCD42V68PAM Service Manual

Hisense LCD42V68PAM Service Manual

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LCD Television
Service Manual
Chassis： MTK8222
Product Type：
LCD42V68PAM
Ver 1.0
Hisense Electric Co.，Ltd.
July，2009

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Summary of Contents for Hisense LCD42V68PAM

  • Page 1 LCD Television Service Manual Chassis： MTK8222 Product Type： LCD42V68PAM Ver 1.0 Hisense Electric Co.，Ltd. July，2009...

  • Page 2: Table Of Contents

    6.4 Troubleshooting for Audio........................- 27 - 6.5 Troubleshooting for TV/VGA/HDMI input..................- 28 - 6.6 Troubleshooting for YPbPr input......................- 29 - 6.7 Troubleshooting for Video/S-Video input.....................- 30 - 7. Explode View..............................- 31 - 8. Schematic circuit diagram ..........................- 31 - Hisense Confidential - 2 -...

  • Page 3: Service Manual

    USE OF NON-AUTHORIZED PARTS WILL VOID THE MANUFACTURE'S WARRANTY Proper service and repair is important to the safe, reliable operation of all Hisense Electric Co., Ltd Equipment. The service procedures recommended by Hisense and described in this Service Guide are effective methods of performing service operations.

  • Page 4: Warning

    LCD TV Service Manual techician trained in the proper Television safety and service methods and procedures Hereafter throughout this manual, Hisense Electric Co., Ltd will be referred to as Hisense. 1.1 Warning 1.1.1 Critical components having special safety characteristics are identified with a by the Ref.
  • Page 5 -Note: >All wire harnesses and flex cables are properly routed and secured with factory tape and/or mounted cable clamps. > All cables and connectors are properly insulated and do not have any bare wires/lead exposed. Hisense Confidential - 5 -...
  • Page 6 (8) If the power connector or the connector of the power cable becomes dirty or dusty, wipe it with a dry cloth. Otherwise, this can lead to fire. (9) Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, Hisense Confidential - 6 -...

  • Page 7: Notes

    When installing the LCD module in, and removing it from the packing carton, be sure to have at least two persons perform the work. • When the surface of the panel comes into contact with the cushioning materials, be Hisense Confidential - 7 -...
  • Page 8 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. Hisense Confidential - 8 -...

  • Page 9: Lcd Panel Spec

    LCD TV Service Manual 2. LCD Panel Spec LCD42V68PAM SN：1058010 Panel Model：V420H1-L15\JK\ROH 2.1 General Description Hisense Confidential - 9 -...
  • Page 10 LCD TV Service Manual 2.2General Features Hisense Confidential - 10 -...

  • Page 11: Chassis Layout And Overall Wiring Diagrams

    LCD TV Service Manual 3. Chassis Layout and Overall Wiring Diagrams Chassis Layout LCD42V68PAM Description Part No. Type/Model PCB/ Model （1） Main Board 120070 RSAG2.908.1497-3\ROH RSAG7.820.1637\VER.E\ROH （2） Power Board 120173 RSAG2.908.1192-13\ROH RSAG7.820.1185\VER.E\ROH （3） Keypad PCA 113354 RSAG2.908.1088\ROH RSAG7.820.1101\VER.B\ROH （4） IR Board 116295 RSAG2.908.1260-2\ROH...

  • Page 12: Factory/Service Osd Menu And Adjustment

    Then please change to desired source. source Timing Pattern Notes ADC VGA 1024*768 gray-3color For VGA source ADC HDTV 720P gray-3color For Component Video Notes: a、Press “M” button and enter factory mode. Hisense Confidential - 12 -...
  • Page 13 Qingdao Jiangxi Road factory Huang Dao Huangdao Industrial Park Gui Yang Gui Yang Industrial Park Liao Ning Liao Ning Industrial Park Hungary Hisense Hungary Australia Hisense Australia France Hisense France Clean data except Clean Protected WB data and Auto Color data...
  • Page 14 STD Saturation Saturation mode Soft Brightness Brightness of Movie mode Soft Contrast Contrast Movie mode Soft Saturation Saturation of Movie mode Audio Set Volume Min When value is 1 Think about the Audio out power Hisense Confidential - 14 -...
  • Page 15 5kHZ 10kHZ Backlight co PVM 0-350 PVM 350-500 PVM500-1000 PVM 1000-10000 PVM 10000- Power Mode Last station The above “Factory/Service OSD Menu” are reference only, please refer to the actual units to determine the appearances. Hisense Confidential - 15 -...

  • Page 16: Software Upgrading

    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 RS232 port. USB connector: to PC. Serial connector: to TV’s RS232 port. Hisense Confidential - 16 -...
  • Page 17 LCD TV Service Manual 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 - 17 -...

  • Page 18: Upgrading With The Mtktool

    Flash chip model Please refer to follow steps to update the software: 1—Select mode of Flash chip to MT8226 as the below picture. 2—Refer to the next page instruction to select the communicate port. Hisense Confidential - 18 -...
  • Page 19 5—Click the browse button to select the *.bin file that will be updated. 6—Click the “start” button to update software. Select mode Communicate Flash Select *.bin of Flash chip port Baud Rate file Start upgrade Choose the current USB conversion Port Later choose com5 Information upgrade process Hisense Confidential - 19 -...
  • Page 20 Note: Whether or not click the “Auto Set Flash Baud Rate” in the “window” menu depends on the chip type. If the flash chip does not support high speed transport, do not select this option; otherwise, reserve the selected mood. Hisense Confidential - 20 -...
  • Page 21 LCD TV Service Manual Click “Browse” button, find the upgrading program file, and select it. Press “Upgrade” button and start upgrading. The following interface appears on the screen, indicating upgrading successfully. Hisense Confidential - 21 -...

  • Page 22: Update With Usb Directly

    5.3 Update with USB directly he second update method is with USB directly: MTK8222 Series can update with USB, the software name should be HISENSE.bin. The Updating Steps is set the Source to "DMP interface", insert the USB(the update file HISENSE.bin,which should be in root directory),The TV automatic identify the upgrading software.
  • Page 23 LCD TV Service Manual After upgrading, you must confirm the software in the Factory Menu and you'd better "CLEAR UNPROTECTLY". Hisense Confidential - 23 -...

  • Page 24: Troubleshooting

    Try new batteries Replace battery Replace RC Replace remote control Check IR receiver Change Led & IR board Replace Led & IR BD Change Led & IR cable Replace Led & IR cable Replace main board Hisense Confidential - 24 -...

  • Page 25: Troubleshooting For Function Key

    6.2 Troubleshooting for Function Key Buttons does not work Check solder connections and Check switches see if any switches are stuck. Replace Key BD Check key board Check Key BD cable Change Key BD Replace main board Hisense Confidential - 25 -...

  • Page 26: Tv Won't Power On

    Try Power on by Check signal RC and Button Panel Bright Source Neither Both works Work Replace Main Replace Main BD Power on Replace Panel (to contact Hisense tech support.) Replace Power BD Hisense Confidential - 26 -...

  • Page 27: Troubleshooting For Audio

    LCD TV Service Manual 6.4 Troubleshooting for Audio No sound Reconnect Check connecter Replace speaker wire Check speaker wire Replace speaker set Check speaker set Replace main board Power Supply Board Hisense Confidential - 27 -...

  • Page 28: Troubleshooting For Tv/Vga/Hdmi Input

    LCD TV Service Manual 6.5 Troubleshooting for TV/VGA/HDMI input No picture on the screen Check Signal Source Make sure signal source is available Reconnect Check connect Check cable Replace cable Replace main board Hisense Confidential - 28 -...

  • Page 29: Troubleshooting For Ypbpr Input

    LCD TV Service Manual 6.6 Troubleshooting for YPbPr input No picture on the screen Check Source work or not Check Source Device Reconnect Check connect Check Wires (Green Blue, Red) Replace wires Replace main board Hisense Confidential - 29 -...

  • Page 30: Troubleshooting For Video/S-Video Input

    LCD TV Service Manual 6.7 Troubleshooting for Video/S-Video input No picture on the screen Check Source work or not Check Signal Source Reconnect Check connect Replace Cable/Wires Check Cable/ Wires Replace main board Hisense Confidential - 30 -...

  • Page 31: Explode View

    LCD TV Service Manual 7. Explode View 8. Schematic circuit diagram Hisense Confidential - 31 -...
  • Page 32 Hisense LCD42V68PAM...
  • Page 33 Hisense LCD42V68PAM Parts list Part Name Qty. Code No. Remark Front cover RSAG6.179.276 Black Speaker YDT415E-10W8R-F Connector TJC3H-4Y-500-900 Key board unit RSAG2.908.1088 Pedestal WG6.121.052 Black Screw GB/T 818-2000 M6X16 Power Cord YS-05+YS-22A Back cover RSAG8.074.544 Black Bottom Label RSAG8.804.3401 Side Label RSAG8.804.3550...
  • Page 34 5V_M 5V_M 5V_M 5V_AMP 5V_M 2,3,6,8,12,14 5V_AMP 5V_AMP C344 C344 C817 C817 R668 R668 R685 R685 10uF 10uF 0.1uF 0.1uF 12V_M 删除电阻 CE64 CE64 CE69 CE69 20080911 12V_M 4.7k 4.7k 4.7k 4.7k 12V_M 2,11,14 更改AUDIO OUT放大电路电源 SCT1_AUL_OUT R673 R673 SCT2_AUL_OUT R684 R684 +3V3...
  • Page 35 5V_M MAIN POWER D188 D188 +5V_ON +5VS B240A B240A +5V_ON +3V3 5V_M D185 D185 +3V3 +3V3 3,4,6,7,11,13,14 5V_M +5VS B240A B240A 12V_M CE68 CE68 CB219 CB219 R259 R259 D187 D187 CE66 CE66 CB218 CB218 FB64 FB64 220uF/16v 220uF/16v 0.1uF 0.1uF 12V_M 12V_M 470uF/16v...
  • Page 36 System I2C CVBS input R2424 R2424 NS/100 NS/100 TP134 TP134 OSCL0 CVBS1 OFF_MUTE OSCL0 6,8,11,14 CVBS1 8 OFF_MUTE 14 OSDA0 CVBS2 OSDA0 6,8,11,14 CVBS2 8 CVBS3 2,4,5,6,7,8,9,10,11,12,13,14 CVBS3 8 CVBS4 CVBS4 8 CVBS5 CVBS5 10 CVBS6 U0RX SPDIF IN / OUT CVBS6 10 U0RX U0TX...
  • Page 37 DV10 ( Bypass CAPs arround MT8222 ) DV10 DV10 +3V3 +3V3 +3V3 2,3,6,7,11,13,14 add by 08/03/20 DV10 DV33 DV33 DV33 AV33_SIFDIG AV12 CE62 CE62 C886 C886 C887 C887 C888 C888 C889 C889 C890 C890 C891 C891 C892 C892 C893 C893 C894 C894 AV33_SIFDIG...
  • Page 38 RDQS0 RDQS0 3 RDQS1 RDQS1 3 RDQM0 RDQM0 3 RDQM1 RDQM1 3 增加FB31 RWE# RWE# 20080911 RCAS# RCAS# RRAS# ( DDR1 DRAM With Termination ) RRAS# RCS# FB31 FB31 RCS# 0603/181 0603/181 RCKE RCKE RND10 RND10 MEM_DQ0 RND1 RND1 RDQ0 MEM_DQ1 RDQ1 RDQ[15..0]...
  • Page 39 1st UART IF System E2PROM System Reset# VER.D更改：预留HDCP写入E2PROM ( For Code download and Debug ) PWM2 20081223 PWM2 +3V3 +3V3 ORESET# ORESET# +3V3 10K/NC R88 10K/NC OIRI OIRI CE37 CE37 10K/NC R34 10K/NC 100/NC R87 100/NC 4.7K 4.7K 4.7K 4.7K 220uF/16V 220uF/16V 100/NC R86...
  • Page 40 +3V3 +3V3 +3V3 2,3,4,6,11,13,14 +3V3 HDMI port 0 D153 D153 ESD 1.3 USDED HDMI TYPE-A HDMI TYPE-A R-HDMI-L-HX R-HDMI-L-HX RB520S-30 RB520S-30 RX0_2 RX0_2 RX0_2 R-SOD3718N-HX R-SOD3718N-HX R1605 R1605 RX0_2 RX0_2B RX0_2B RX0_2B RX0_2B RX0_1 R121 R121 2008/06/10 RX0_1 CECA CECA RX0_1 RX0_1 RX0_1B...
  • Page 41 AV1+S-Video1 Input NEAR CONNECTOR NEAR IC P16B P16B 左 左 AV1_IN AV1_IN 47nF 47nF CVBS1 SIGNAL 黄 黄 CVBS1 CVBS1 3 CVBS2 CVBS2 3 CVBS3 CVBS3 3 中 中 下 下 EZJZ0V800AA EZJZ0V800AA CVBS4 R441 R441 CVBS4 3 47pF 47pF AV1L_IN AV1_L SIGNAL...
  • Page 42 NEAR IC NEAR CONNECTOR NS/4.7nF NS/4.7nF SOY0 FB16 FB16 Y0_IN SCT1_R 10nF 10nF 80@100MHz 80@100MHz 15pF 15pF EZJZ0V800AA EZJZ0V800AA 2008/05/05 MODIFY Only for US, EU not stuff Y0_IN_GND 10nF 10nF YPBPR0_GND FB29 FB29 PB0_IN SCT1_G 10nF 10nF PB0P 80@100MHz 80@100MHz 15pF 15pF EZJZ0V800AA...
  • Page 43 Only for EU, US not stuff NEAR CONNECTOR Near swtich SCART Connector VER SCART Connector VER SCT1_AUR_OUT FB13 FB13 AUDIO_OUT_R SCT1_AV_IN SCT1_AV 47nF 47nF CVBS5 SCT1_AUR_IN AUDIO_IN_R SCT1_AUL_OUT AUDIO_OUT_L EZJZ0V800AA EZJZ0V800AA 47pF 47pF GND_Audio SCT1_GB_GND GND_Blue SCT1_AVI_GND SCT1_AUL_IN AUDIO_IN_L SCT1_B_IN PR0_IN Blue_I/O SCT1_FS_IN...
  • Page 44 TUNER_IF TUNER_IF +5V_TUNER +5V_TUNER +5V_TUNER +5V_TUNER +5V_TUNER 2 12V_M R326 R326 4.7K 4.7K 4.7K 4.7K 2N7002 2N7002 2,3,4,5,6,7,8,9,10,12,13,14 N-MOSFET 100uH 100uH 10uH 10uH OSCL0 SCL_V50 +5V_TUNER IF_TUNER NS/1N4148 NS/1N4148 CVBS0P D109 D109 CVBS0P +3V3 CVBS0N R-SOT3N-0.95-2.75-HX R-SOT3N-0.95-2.75-HX CVBS0N C613 C613 R644 R644 IF_AGC...
  • Page 45 AUD_LOUT CA154 CA154 10uF/10v 10uF/10v RA110 RA110 AUD_L 5V_M 5V_M AMUX_5V 5V_M FBA1 FBA1 AUD_ROUT CA155 CA155 10uF/10v 10uF/10v RA111 RA111 AUD_R 5V_M 2,3,6,8,13,14 0603_Bead 0603_Bead CA69 CA69 CA71 CA71 CA68 CA68 4.7uF/16v 4.7uF/16v CA70 CA70 100uF/16v 100uF/16v 0.1uF 0.1uF 0.1uF 0.1uF AMUX_5V...
  • Page 46 VER.D更改：LVDS-SEL预留3.3V 20081223 +3V3 +3V3 LVDSVDD +5V_ON 5V_M LVDS POWER R364 R364 R353 R353 增加120HZ屏GPIO口 R352 R352 +5V_ON NS/4K7 NS/4K7 王西瑜20090301 NS/0 NS/0 VBR_OUT 4.7K/NS 4.7K/NS +5V_ON 2 R-RESC1005L-HX R-RESC1005L-HX +3V3 R428 R428 12V_M LVDSVDD LVDSVDD R367 R367 GPIO_8 LVDSVDD LVDSVDD LVDSVDD +3V3 +3V3...

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