hit counter script
Haier LD42U7000 Service Manual
  1. Manuals
  2. Brands
  3. Haier Manuals
  4. LCD TV
  5. LD42U7000
  6. Service manual
Haier LD42U7000 Service Manual

Haier LD42U7000 Service Manual

42 inch &50 inch lcd tv
Hide thumbs Also See for LD42U7000:
Table of Contents

Advertisement

Quick Links

See also: Owner's Manual
42"&50" LCD TV
Service
Service
Service
Description
Table of Contents........................................................1
Important Safety Notice...............................................2
Revision List........................................................3
1. General Specification..................................................4
2. Operating Instructions.........................................5
2.1 Remote Control..................................................5
2.2 OSD Menus.......................................................6
3. Input/Output Specification.....................................19
4. Mechanical Instructions........................................22
5. Repair Flow Chart .............................................25
6. PCB Layout .....................................................32
6.1 Main Board .....................................................32
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
R FOR TH
UNIT WHEN S

Table of Contents

Page Description
6.2 Power Board................................ ...................32
6.3 IR Board..................................................32
6.4 KeyBoard..................................................32
7. Adjustment..............................................................33
7.1 ADC/WB Adjustment..............................................33
7.2 Firmware and DDC Instruction..............................34
8. Block Diagram........................................................35
9. Wiring Diagram.......................................................37
10. Schematic Diagram.........................................37
10.1 Main Board...................................................37
10.2 Power Board.................................................51
10.3 IR Board.......................................................58
10.4 Key Board..................................................59
SAFETY NOTICE
1
Haier LD42U7000&LD50U7000
Page

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the LD42U7000 and is the answer not in the manual?

Questions and answers

Related Manuals for Haier LD42U7000

Summary of Contents for Haier LD42U7000

  • Page 1: Table Of Contents

    42″&50″ LCD TV Haier LD42U7000&LD50U7000 Service Service Service Table of Contents Description Page Description Page Table of Contents..……........…..1 6.2 Power Board……..…………………... …..…..32 6.3 IR Board………….……………..……….…..32 Important Safety Notice........……..2 Revision List………………………………………………..3 6.4 KeyBoard……..…………………...…….…..32 1. General Specification........………..4 7. Adjustment..............33 2. Operating Instructions..………………….……...……..5 7.1 ADC/WB Adjustment..........33...

  • Page 2: Important Safety Notice

    Haier LD42U7000&LD50U7000 Important Safety Notice Proper service and repair is important to the safe, reliable operation of all Haier Company Equipment. The service procedures recommended by Haier and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose.

  • Page 3: Revision List

    42″&50″ LCD TV Haier LD42U7000&LD50U7000 Revision List Version Release Date Revision Instructions Customer Model Model Otc.25,2013 Initial release LD42U7000 E42D51NCBPH7NNK Otc.25,2013 Initial release LD50U7000 E50D51NCBPH7NNK...

  • Page 4: General Specification

    42″&50″ LCD TV Haier LD42U7000&LD50U7000 1. General Specification Model Name LD42U7000 LD50U7000 Resolution 1920 x 1080 1920 x 1080 Aspect Ratio 16:9 16:9 PAL/SECAM BG DK I，NTSC-M PAL/SECAM BG DK I，NTSC-M TV System Video Signal PAL/SECAM/NTSC PAL/SECAM/NTSC System Receiving Channel...

  • Page 5: Operating Instructions

    42″&50″ LCD TV Haier LD42U7000&LD50U7000 2. Operating Instructions 2.1 Remote Control...

  • Page 6: Osd Menus

    42″&50″ LCD TV Haier LD42U7000&LD50U7000 2.2 OSD Menus...
  • Page 7 42″&50″ LCD TV Haier LD42U7000&LD50U7000...
  • Page 8 42″&50″ LCD TV Haier LD42U7000&LD50U7000...
  • Page 9 42″&50″ LCD TV Haier LD42U7000&LD50U7000...
  • Page 10 42″&50″ LCD TV Haier LD42U7000&LD50U7000...
  • Page 11 42″&50″ LCD TV Haier LD42U7000&LD50U7000...
  • Page 12 42″&50″ LCD TV Haier LD42U7000&LD50U7000...
  • Page 13 42″&50″ LCD TV Haier LD42U7000&LD50U7000...

  • Page 14: Panel Control And Rear Terminal Control

    42″&50″ LCD TV Haier LD42U7000&LD50U7000 2.3 Panel Control and Rear Terminal Control...
  • Page 15 42″&50″ LCD TV Haier LD42U7000&LD50U7000...
  • Page 16 42″&50″ LCD TV Haier LD42U7000&LD50U7000...
  • Page 17 42″&50″ LCD TV Haier LD42U7000&LD50U7000...
  • Page 18 42″&50″ LCD TV Haier LD42U7000&LD50U7000...

  • Page 19: Input/Output Specification

    42″&50″ LCD TV Haier LD42U7000&LD50U7000 3. Input/Output Specification 3.1 Input Signal Connector D-SUB Pin No. Description Pin No. Description Red Video No Pin Green Video Sync Ground Blue Video Serial Data for DDC Ground H. Sync Red Ground V. Sync...
  • Page 20 42″&50″ LCD TV Haier LD42U7000&LD50U7000 3.2 Input Signal Timing...
  • Page 21 42″&50″ LCD TV Haier LD42U7000&LD50U7000...

  • Page 22: Mechanical Instructions

    42″&50″ LCD TV Haier LD42U7000&LD50U7000 4. Mechanical Instructions LD42/50U7000 Step1. Remove the BASE. Step2. Remove the REAR COVER.
  • Page 23 42″&50″ LCD TV Haier LD42U7000&LD50U7000 Step3. Remove the MAIN BOARD and POWER BOARD. Step4. Remove the BKT_STAND、KEY BOARD、SPEAKERS and IR BOARD.
  • Page 24 42″&50″ LCD TV Haier LD42U7000&LD50U7000 Step5. Remove the DECO_BEZEL .

  • Page 25: Repair Flow Chart

    42″&50″ LCD TV Haier LD42U7000&LD50U7000 5. Repair Flow Chart 1. No power No power (LED “Off”) Check the AC input and Power “On” the power is “ON”? Power board Replace the power board output=5.2V? Check the IR board and LED...
  • Page 26 42″&50″ LCD TV Haier LD42U7000&LD50U7000 2. Can’t start Can’t start（LED Blue） Replace the power board Power board output＝12V/24V? Replace the key board Check the power key is under control? Replace the IR board Check the IR receiver is normal? Replace the main board...
  • Page 27 42″&50″ LCD TV Haier LD42U7000&LD50U7000 3. Abnormal Display Abnormal Display Reset the source Check the source Enter factory mode to do “EEPROM initial”&“Reset” Replace the main board Check the main board Check the LVDS cable Replace the LVDS cable Check the panel...
  • Page 28 42″&50″ LCD TV Haier LD42U7000&LD50U7000 4. No display No display (LED Red) Check TV is under control and power Replace the main board on/off by remote control and power key? Check the backlight is “On”? Check the LVDS cable Check the B/L...
  • Page 29 42″&50″ LCD TV Haier LD42U7000&LD50U7000 5. Sound problem No sound or sound abnormal Check the audio source connection and the TV system are correct? Reinsert the audio cable or change the TV system Check the TV is muted, adjust the volume or enter the menu to reset? Enter factory mode to do “Reset”...
  • Page 30 42″&50″ LCD TV Haier LD42U7000&LD50U7000 6. Remote control malfunction Remote Control malfunction Check the remote control battery is Replace the battery not properly placed or no power? Use the other remote controls Replace the remote control Whether the IR board is...
  • Page 31 42″&50″ LCD TV Haier LD42U7000&LD50U7000 7. OSD is unstable or can’t work normally OSD is unstable or can’t work normally Key board connected properly? Reconnect the key board Replace the button function Buttons are OK? Replace the key board Key board is OK? Enter factory mode to do “Reset”...

  • Page 32: Pcb Layout

    42″&50″ LCD TV Haier LD42U7000&LD50U7000 6. PCB Layout 6.1 Main Board 715G6250-M0D-000-0040 6.2 Power Board 715G5996-P01-000-0020...

  • Page 33: Adjustment

    7. Adjustment 7.1 ADC/ WB Adjustment White Balance Adjustment: Press “Menu+8893” by Haier Remote Control to enter Factory menu, change “Current Source” to “component”, then change “Color Temp” to Cool, Normal, Warm, then choose Gain, set R/G/B to color temperature spec range under each color temp. Choose LE26H100C for example: Attention: R ,G,B should be less than 138,128,138, make sure that other source’s R,G,B is the same as component.

  • Page 34: Firmware And Ddc Instruction

    42″&50″ LCD TV Haier LD42U7000&LD50U7000 7.2 Firmware and DDC Instruction 1. Copy software to USB flash disk (root directory). 2. Open the TV 3. Insert USB to TV. Choose “Enter”. After USB SW update OK, TV will reboot. 4. Press “Menu +8893”, then TV will enter factory menu. Check SW version, if OK, then do reset. USB SW updates...

  • Page 35: Block Diagram

    8. Block Diagram Memory DDR3 DDR3 2G bit 1600MHz 2G bit 1600MHz K4B2G1646E-BCK0 K4B2G1646E-BCK0 DDR3 MEMC 2G bit 1600MHz THGBM5G5A1JBAIR K4B2G1646E-BCK0 LVDS Out To Panel. LVDS Out HDMI 1 With MEL & ARC (Side) USB4 USB3.0 / USB 2.0 Dual Layout. (Side) HDMI 2 (Down) USB3 USB2.0 (Side)
  • Page 36 U409(Flash) 120 mA U701 U411(Reset IC) 30 mA 850mA 250mA 250mA AP2112K-3.3TRG1 +5VSB +3.3V_Standby 30 mA U401(Scaler IC) TO23-5 Key/IR/Light Sensor Board 30 mA FB703 600mA U705 U402,U403,U404(DDR3) 400 / 400 / 400 mA 1500mA +1.5V_DDR TPS54228 U401(Scaler IC) 300 mA 250 mA SOP8 5VB or +12V_Normal==>EN...

  • Page 37: Wiring Diagram

    9. Wiring Diagram LD42/50U7000 Panel 12 Pin 6 Pin N8501 CN16 CN15 30 Pin CN9101 CN25 POWER BOARD CN27 CN25 7 Pin Speaker R/L...

  • Page 38: Schematic Diagram

    10. Schematic Diagram 10.1 Main Board 715G6250M0D0000040 1） VGA,YPbPr,AV In & Audio In CVBS Line Output(Side) +5V_Normal 0513 +5V_Normal D101 BAT54CH R134 R137 VGA Input (Down) 470R 1/16W 1% 20K 1/16W C113 +5V_Standby 100N 16V Video Out OP Q101 C114 CN101 MMBT3906 10uF 10V...
  • Page 39 2）Tuner , Demod +3.3V_Tuner TS_D[0:7] 7,11 350mA +3.3V_Normal TSO_D7 TS_D7 R128 TSO_D6 TS_D6 R129 TSO_D5 TS_D5 R130 R131 TSO_D4 TS_D4 TU101 R132 R133 ST21WN-2I-E R135 TSO_D3 R136 TS_D3 C175 C174 R138 10PF 50V 100N 16V TSO_D2 R139 TS_D2 from M_SDA TSO_D1 TS_D1 R158...
  • Page 40 3）HDMI/MHL Inputs HDMI2 (Down) CN501 SHELL1 HDMI1-RX2P U501 +HDMI1/5V D2 Shield HDMI1-RX2N SHELL3 HDMI1-RX1P HDMI1-CLKN HDMI1-CLKN 11 HDMI1-CLKP D1 Shield HDMI1-CLKP 11 HDMI1-RX1N HDMI1_DET R530 4.7K 1/16W R542 HDMI1_DET 11 HDMI1-RX0P HDMI1-RX0N R531 10K 1/16W 0R05 1/16W HDMI1-RX0N 11 HDMI1-RX0P D0 Shield HDMI1-RX0P 11 HDMI1-RX0N...
  • Page 41 4）USB & RJ45 Note:5.1R筿 綼 狠 搭 USB1 0.75A USB2 Note:5.1R筿 綼 狠 搭 0.75A +5VUSB USB CONN TH102 CN106 trace : diffenentail 90 R +5VUSB USB CONN TH103 CN107 trace : diffenentail 90 R R170 5.1R 1/16W USB0_D- R172 5.1R 1/16W PTCR USB0_D+ 11 R171 5.1R 1/16W...
  • Page 42 5）PCMCIA & CA PCMCIA VCC-PCMCIA VCC-PCMCIA CN111 PCM_CD1_N PCM_D3 CD1# TS_MDO3 PCM_D4 TS_MDO4 PCM_D5 VCC-PCMCIA TS_MDO5 PCM_D6 TS_MDO6 PCM_D7 TS_MDO7 PCM_CE_N CE1# PCM_A10 CE2# PCM_OE_N VS1# PCM_IORD_N PCM_A11 R184 IORD# PCM_IOWR_N PCM_A9 PCMCIA POWER IOWR# PCM_A8 4,11 TS_SY NC TS_D0 PCM_A13 30mils.
  • Page 43 6）DDR R401 22 OHM 1/16W R402 22 OHM 1/16W RP401 RP402 U401A A-DDR3-ODT-T1 A_DDR3_ODT A_DDR3_ODT A-DDR3-ODT-T2 A-DDR3-BA0-T1 A_DDR3_BA0 A_DDR3_BA0 A-DDR3-BA0-T2 A_DDR3_DQ3 A-DDR3-DQ3 A_DDR3_DQS3B A-DDR3-DQS3B A_DDR3_A0 B_DDR3_A0 A_DDR3_A0/DDR2_A5 B_DDR3_A0/DDR2_A5 R403 22 OHM 1/16W R404 22 OHM 1/16W A_DDR3_DQ1 A-DDR3-DQ1 A_DDR3_DQS3 A-DDR3-DQS3 A_DDR3_A1 B_DDR3_A1 A_DDR3_A1/DDR2_A13...
  • Page 44 7）DDR&POWER DDR3 2G bit 1600MHz DDR3 2G bit 1600MHz A_DDR3_MCLK A_DDR3-MCLK A-DDR3_MCLK R417 22 OHM 1/16W R418 0R05 1/16W A_DDR3_MCLK A_DDR3_MCLKZ A_DDR3-MCLKZ A-DDR3_MCLKZ R419 22 OHM 1/16W R420 0R05 1/16W A_DDR3_MCLKZ U402 U403 A-DDR3-DQ0 A-DDR3-A0-T1 A-DDR3-DQ16 A-DDR3-A0-T2 A-DDR3-DQ0 A-DDR3-A0-T1 8 A-DDR3-DQ16 A-DDR3-A0-T2 8 A-DDR3-DQ1...
  • Page 45 8）NAND Flash & SD Card SD/MMC Card Reader +3.3V_Normal SCV CONN CN109 SD-D3 iNAND FLASH DAT3 SD-CMD NF_POWER NF_POWER SD-CLK U407 SD-D0 DAT0 NF_D0 NF_D0 SD-D1 R462 10K 1/16W DAT0 DAT1 NF_D1 NF_D1 R463 10K 1/16W SD-D2 DAT1 DAT2 130mA 130mA NF_D2 NF_D2...
  • Page 46 9）Front End GPIO KEY IR FLASH RGB & CVBS & LAN & USB GPIO & LVDS +3.3V_Standby R4232 4.7K 1/16W U401D Close to MST IC U409 U401E Close to MST IC SPI_CSN with wide trace SPI_SDO CFG-PWM0 AF31 HOLD# SO/SIO1 PWM0 R4113 68 OHM +-5% 1/16W C466 47NF 16V...
  • Page 47 10）MSD8560 PWR & GND Power interface +VDDC1.2V FB403 120R/500mA AVDD5V_MHL C4156 C4127 C4128 C4129 +3.3V_Normal C4126 100N 16V TP402 10UF 10V 10UF 10V 100N 16V 100N 16V +3.3V_Normal +3.3V_Standby +1.5V_DDR +VDDC1.2V +2.5V_Normal AVDD25_PGA VCC_VSENSE C4130 C4131 C4132 C4133 100N 16V 100N 16V 100N 16V 100N 16V...
  • Page 48 11）LVDS +PANEL_POWER +3.3V_Normal +3.3V_Normal CN408 R4218 R4219 LVDSSEL/3D_ON R4231 R4226 PANEL_ON/OFF LVDSSEL/3D_ON R4220 R4230 R4222 R4216 15,17 BRT_CNTL_IN R4221 R4229 4,11,14,17,18 M_SDA M_SCL 4,11,14,17,18 R4212 R4211 Q408 Q411 PANEL_S2 PANEL_S1 CCKP CCKM 3D_SY NC_OUT R4227 R4225 LR_SY CN +3.3V_Normal 0513 DCKP DCKM R4215...
  • Page 49 12）Audio AMP,Coxial and Woofer For layout routing +5VUSB For layout routing REFA R602 R603 68K 1/16W 1% 4K7 1/16W 1% CN601 U601 +3.3V_Normal AMP-Rout+ Woofer +5VUSB R601 22 OHM 1/16W I2S-OUT_WS GPIO0 OUTPR AMP-Lout+ R604 22 OHM 1/16W C601 +12V_Normal FB601 +AMP_12V I2S-OUT_BCK...
  • Page 50 13）Power I Vout=0.765*( 1+ R1/R2)==>1.23V +5V_Standby +12V_Normal 850 mA 8750 600 mA. +12V FB701 C712 C713 C701 C703 C702 C711 300R 4A 22uF 10V C789 R723 C720 100N 16V 1nF 50V 100N 50V 1nF 50V 100UF 16V 220K 1% R721 10uF 16V 10uF 16V 0R05 1/16W...
  • Page 51 14）Power II Vout = 0.8* (1+R1/R2)==>1.248V Tuner & Demod Power 32 mA 32 mA 417mA 417mA 121mA 121mA 50mA 50mA +3.3V_Tuner +3.3V_Normal +5V_Normal +1.8V_Normal +3.3V_Tuner +1.2V_DM R765 R769 R745 R746 R757 R756 U709 0R05 1/10W 0R05 1/10W U710 0R05 1/10W U712 0R05 1/10W VOUT...

  • Page 52: Power Board

    10.2 Power Board 715G5996-P01-000-0020 1）AC input C9910 SG9901 NR9901 F9901 FB9901 BEAD 220PF 250V DSPL-501N-A21F-NC T5.0AH/250V 2.5R FUSE R9905 R9903 510K 1/4W 510K 1/4W TS6K80-02 CN9901 C9903 BD9901 100PF 250V 470NF 275V C9905 R9901 R9906 510K 1/4W 510K 1/4W L9901 RV9901 30MH L9902...
  • Page 53 2） PFC...
  • Page 54 D9801 IN5408G-04 C9817 FB9803 FB9802 47PF Vsin BEAD BEAD D9802 L9801 MUR460-28 铬絬 C9801 300uH 1UF 450V Q9801 R9802 D9803 TK15A60U 10R 1/8W 5% RB160M C9818 47PF R9805 20K 1/4W C9814 C9815 R9803 47UF 450V 47UF 450V 33R 1/8W 5% R9804 R9806 10K OHM +-5% 1/8W...
  • Page 55 3） MB R9145 C9141 100 OHM 1/4W 220P 50V R9146 100 OHM 1/4W C9142 220P 50V D9106 C9143 FMEN-220A 220P 50V L9103 R9104 +12V C9144 C9104 82KOHM +-5% 2WS NC/1NF 2.2NF R9141 Q9107 C9114 100KOHM +-5% 1/8W C9120 C9135 C9136 C9137 AOD4185 C9147...
  • Page 56 4） LED Driver D2D FB8101 D8120 L8102 SR515 +24VS VLED 127R C8102 C8101 100N 50V C8114 C8115 L8101 330UF 50V C8118 D8121 SR515 NC NC/1000pF 630V NC/1000pF 630V 33uH Q8101 47UF 100V AOTF454FL C8112 R8145 1 MOHM +-1% 1/8W R8158 C8117 R8154 R8155...
  • Page 57 5）LED Current Balance IC8501 IC8502 IC8503 DIM_IN LED-COMP COMP DIM_IN LED-COMP DIM_IN LED-COMP COMP COMP +12V ISET LED-1 +12V +12V ISET ISET R8501 LED-2 LED-3 12K 1/8W 1% C8501 R8502 R8503 PF7700A 0.47UF 50V 12K 1/8W 1% C8502 12K 1/8W 1% C8503 PF7700A PF7700A...

  • Page 58: Ir Board

    10.3 IR Board 715G6068-R0A-000-0040 +3.3V_Standby +3.3V_Standby +3.3V_Standby +3.3V_Standby NC /2N7002 NC / 10K 1/16W 5% NC / 10K 1/16W 5% CONN E-PAD 10UF 6.3V REXT NC /2N7002 NC / ISL29020IROZ-T7 NC / 10NF 50V R203 NC / 510K 1% +5V_Standby NC / MLVG0402 NC / MLVG0402 IR-in...

  • Page 59: Key Board

    10.4 Key Board 715G6059K01000004S SW001 R001 ~2.4V TACT SW FWRD H1.5MM 300KOHM 1/10W SW002 R002 ~1.6V TACT SW FWRD H1.5MM 100K 1/10W 1% SW003 R003 VOL+ ~0.77V TACT SW FWRD H1.5MM 33K 1/10W SW004 CN001 FUNC_KEY R008 R004 VOL- FUNC_KEY 0R05 1/10W 0R05 1/10W PWR-SW...

This manual is also suitable for:

Ld50u7000

Table of Contents