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48" 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.......................................................8
2.3 Panel Control And Rear Terminal Control............18
3. Input/Output Specification.....................................22
4. Mechanical Instructions........................................25
5. Repair Flow Chart .............................................27
6. PCB Layout .....................................................34
6.1 Main Board .....................................................34
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
Table of Contents
Page Description
6.2 Power Board................................ ...................36
6.3 IR Board..................................................39
6.4 KeyBoard..................................................39
7. Adjustment..............................................................40
7.1 WB Adjustment..............................................40
7.2 Firmware and DDC Instruction..............................41
8. Block Diagram........................................................42
9. Wiring Diagram.......................................................43
10. Schematic Diagram.........................................44
10.1 Main Board...................................................44
10.2 Power Board.................................................52
10.3 IR Board.......................................................57
10.4 Key Board..................................................58
SAFETY NOTICE
1
LE48B7500
Page
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Summary of Contents for Haier LE48B7500
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Page 1: Table Of Contents
48″ LCD TV LE48B7500 Service Service Service Table of Contents Description Page Description Page Table of Contents..……........…..1 6.2 Power Board……..…………………... …..…..36 Important Safety Notice........……..2 6.3 IR Board………….……………..……….…..39 Revision List………………………………………………..3 6.4 KeyBoard……..…………………...…….…..39 1. General Specification........………..4 7. Adjustment..............40 2. Operating Instructions..………………….……...……..5 7.1 WB Adjustment..........40 2.1 Remote Control…………….……...…………...……..5... -
Page 2: Important Safety Notice
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
Revision List Version Release Date Revision Instructions Customer Model Model E48E91NCDLH6NNZ Sept.5,2014 Initial release LE48B7500 E48E91NCDLH62NZ... -
Page 4: General Specification
1. General Specification Model LE48B7500 Resolution 1920×1080 Aspect Ratio 16：9 TV System PAL B/G Video Signal System PAL/SECAM/NTSC Receiving Channel 1-200 Input Power Voltage AC 100-240V 50/60Hz Power consumption 120W Audio Output Power(THD≤7%) 2×10W Analog RGB(VGA) × 1 High-Definition Multimedia Interface (HDMI) × 2 Composite Video Input ×... -
Page 5: Operating Instructions
2. Operating Instructions 2.1 Remote Control... - Page 6 (POWER) Press to turn the TV on or off. The TV is never completely powered off unless it is physically unplugged. 2. S.MODE Press to select the sound mode. 3. P.MODE Press to select the picture mode. 4. 0-9 Press to enter a channel number or password. 5.
- Page 7 17. P. SIZE Press to select picture format. 18. SLEEP Press to set sleep timer. 19. SOURCE Press to select source. No function. 21. Q. VIEW Press to switch to the last viewed channel or source. 22. CH Press to browse through the TV channels. 23.
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Page 8: Osd Menus
2.2 OSD Menus Picture Setup Items Description Personal User can set their favorite setting. Vivid For Enhances picture contrast and sharpness. Standard For standard picture settings. Recommended for home entertainment. Smart Picture Decrease backlight level to save the power For viewing film-based content. Most suitable for viewing in a Movie theater-like environment. - Page 9 Audio Setup Items Description Standard Suitable for spoken dialog. Music Ehance treble and bass Smart Sound Speech Ehance treble and keep the bass at medium level Personal Adjust sound mode as per personal requirement. Sound Mode can also be accessed by pressing the S.MODE button on the remote control. Balance Adjust the balance between left and right speakers to adapt to your listening position.
- Page 10 Items Description Select an OSD menu language can be displayed. Menu Language Default English is selected as menu language. Select a Teletext language in TTX mode. West: Western Europe TTX Language East: Eastern Europe Russian: Russian Arabic: Arabic Resize the aspect ratio of the picture for optimum viewing. Available formats: 16:9, Picture Format 4:3, Zoom1 and Zoom2.
- Page 11 Parental Setup Press the original password of 0000 to enter parental menu. Items Description Channel Lock Lock or unlock the selected chanels. Input Block Lock or unlock the selected input source. Keypad Locked Lock or unlock the key pad. Change Password Change parental password.
- Page 12 Manual search description 1. Select TV menu and select Channels. 2. Select Manual Search and press OK key or ►arrow key to get Manual search sub-menu. 3. Select Start Frequency to input frequency you want to start 4. Select End Frequency to input frequency you want to end 5.
- Page 13 Hotel Model Please press "Menu +100108+ Back " key to enter Hotel menu. Items Decsription Hotel Mode Operation Set Hotel model on/ off. Max Volume Set max volume limited. This option allows you to set Max Vloume level. Volume Default Select default volume for hotel mode reset.
- Page 14 TV USB port can be used to view JPEG photos, play mp3 music and Video files,and read text present in USB devices. Entering to USB Media Press USB key on remote to get USB Media menu as shown above Or Press the Source key and keys on remote and select USB source to get USB Media menu as shown above.
- Page 15 USB menu settings for Photo Slide show Press Menu key to get following Menu setup shown above. 1. [Play/Pause]: Play/Pause photo play. 2. [Repeat]: Select the repeat mode as None, Repeat One, Repeat All. 3. [Random]: Select Shuffle mode as Shuffle Off, Shuffle On. 4.
- Page 16 Playing Video files 1. Thumbnail of the available video files will be displayed on the screen. If no files are displayed then select the folder containing the video files. 2. To play particular video file select the required file and press OK key. 3.
- Page 17 Formats supported to multimedia mode: Photo, Music, Movie and Text. Format Resolution Type Note Base-line:15360×8640 Base-line JPEG Progressive:1024×768 Progressive Picture 9600×6400 9600×6400 Format Sample Rate Date Rate Channel Audio 32KHz-48KHz 32Kbps-320Kbps Mono/Stereo Format File Extension Codec Data Rate Real media .RM/.RMVB RealVideo 8/9 20Mbit/sec...
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Page 18: Panel Control And Rear Terminal Control
2.3 Panel Control and Rear Terminal Control... -
Page 22: Input/Output Specification
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 Green Ground Serial Clock for DDC Blue Ground HDMI Pin No. - Page 23 37.879 60.317 1024 × 768 48.363 60.004 ( * LE32B7500 ) 1360 × 768 47.72 59.799 ( Only for LE48B7500/LE50B7500) 1440 × 900 * 55.469 59.901 ( Only for LE48B7500/LE50B7500) 1680 × 1050 * 65.29 59.954 ( Only for LE48B7500/LE50B7500) 1920 ×...
- Page 24 Video Input Signal Reference Table Connect the component signal or HDMI port of video device to your TV set and set up the output signal of the video device in accordance with table below. If your computer display card supports signals of video format then you can set up following output signal. Default Component or HDMI Mode Standard Resolution...
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Page 25: Mechanical Instructions
4. Mechanical Instructions Step1. Remove the BASE. Step2. Remove the REAR COVER. - Page 26 Step3. Remove the MAIN BOARD、POWER BOARD、BKT IO. Step4. Remove the BKT_STAND、SPEAKERS. Step5. Remove the DECO. Step6. PANEL.
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Page 27: Repair Flow Chart
5. Repair Flow Chart 1. No power No power (LED “Off”) Check the AC input and Power “On” the power is “ON”? Power board output=5V? Replace the power board Check the IR board and LED Replace the IR board Replace the main board... - Page 28 2. Can’t start Can’t start（LED Blue） Replace the power board Power board output＝12V? 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 Replace the Power board...
- Page 29 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 Replace the panel...
- Page 30 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 signal is available? Reinsert or replace the LVDS cable Replace main board...
- Page 31 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 32 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 Replace the IR board abnormal? Replace the main board...
- Page 33 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” Replace the main board...
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Page 34: Pcb Layout
6. PCB Layout 6.1 Main Board 715G6686M01001004K... -
Page 36: Power Board
6.2 Power Board 715G6439P01002002M... -
Page 39: Ir Board
6.3 IR Board 715G6721R02000004I 6.4 Key Board 715G6715K01000004I... -
Page 40: Adjustment
7. Adjustment 7.1 WB Adjustment 1. Enter factory model，step “Menu+8893”; 2. This TV adjust Ypbpr source，example Ypbpr source Normal temperature; 3. Choose “Current Source” to Ypbpr whit remote control， “Color temp” as NORMAL; 4. Entry white pattern from chroma 23291(COMPONENT mode: TIM = 314; PAT = 141(80IRE)) 5. -
Page 41: Firmware And Ddc Instruction
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 42: Block Diagram
8. Block Diagram IF+/- ATV&DTV HDMI1 HDMI2 LVDS Panel MST6931 YPbPr CVBS_OUT APA2614 SPEAKER Headphone APA2176... -
Page 43: Wiring Diagram
9. Wiring Diagram Panel 12 Pin 16 Pin CN9100 CN8101 4 Pin CN601 30 Pin Power Board CN403 9 Pin Main Board CN401 MST6931XP CN701 Key Board 4 Pin 5 Pin CN01 IR Board CN201 Speaker R Speaker L... -
Page 44: Schematic Diagram
10. Schematic Diagram 10.1 Main Board 715G6686M01001004K C704 +5V_Normal 22pF 50V R742 0R05 1/16W +5V_Standby Vout = 0.6x(1+100/13.3)=5.11V R702 R726 100K 1% R728 U706 R725 C726 BL_PWM BL_EN BL_EN 13.3K 1% +5V_Standby PS_ON R762 100OHM1/16W R763 NC/100R 0.1uF 50V 3D_EN Q702 R704 FB703... - Page 45 +5V_Standby H/W Reset R403 D401 1M 1/16W BAV99 HDMI_HP1 HOTPLUG1 HDMI1-SCL HDMI1_DDC_SCL HDMI1-SDA RXO0- HDMI1_DDC_SDA R404 RXO0- HDMI1-CLKP RXO0+ C402 HDMI1_CLK+ RXO0+ HDMI1-CLKN RXO1- HDMI1_CLK- RXO1- HDMI1-RX0P 2.2UF 16V RXO1+ HDMI1_D0+ RXO1+ HDMI1-RX0N RXO2- Q402 HDMI1_D0- 4.7K 1/16W RXO2- HDMI1-RX1P RXO2+ MMBT3906 C403...
- Page 46 RXO0- RXO0- RXO0+ R437 0oHM RXO0+ RXO1- P12V RXO1- RXO1+ RXO1+ Panel Power RXO2- R438 RXO2- RXO2+ +5V_Standby RXO2+ RXOC- RXOC- NC/0oHM PANEL_VCC RXOC+ RXOC+ RXO3- RXO3- Q401 RXO3+ C401 RXO3+ AO3407A R439 100K 1/16W 220N 25V RXE0- R473 C437 R440 RXE0- RXE0+...
- Page 47 YPBPR Video/AV2 IN AV1 IN Close IC side R102 CN102 R148 C102 C147 AV1-CVBS0P AV1-CVBS0P 33 OHM 1/16W 47nF 16V 33 OHM 1/16W 47nF 16V R104 C105 47nF 16V ZD102 33 OHM 1/16W R141 AGND ZD103 R106 75 OHM NC/MLVG0402 C106 NC/MLVG0402 ZD104...
- Page 48 From Main Chip CN501 CN502 HDMI0-RX2P HDMI0_D2+ HDMI0-RX2N SHLD0 SHLD0 HDMI0_D2- HDMI0_D2+ HDMI1_D2+ HDMI0-RX1P R515 4.99ohm 1/16W +/-1% R523 4.99ohm 1/16W +/-1% TMDSD2+ TMDSD2+ HDMI0_D1+ HDMI0-RX1N DGND DSHLD0 SHLD2 DSHLD0 SHLD2 HDMI0_D1- HDMI0_D2- R516 4.99ohm 1/16W +/-1% HDMI1_D2- R524 4.99ohm 1/16W +/-1% HDMI0-RX0P TMDSD2- TMDSD2-...
- Page 49 Silicon Tuner 1K_100MHz/400_400MHz 300mA Tuner Power AGND DGND 3.3V_TUNER +5V_Normal 3.3V_TUNER U101 FB101 Main Chip <--> TU101 ST33WS-2-E VOUT 1000OHM 300mA C129 C130 TUN_IF+ VIFP C127 TUN_IF- VIFM 2.2UF 16V Tuner3.3V 3.3V_TUNER 10uF 10V C128 100UF 16V C101 3.3V SCL_CAN 100N 16V 100N 16V SDA_CAN...
- Page 50 AV_L_OUT# 1.2A Max AMP_AUOUTL0 U601 AV_R_OUT# +5V_Normal AMP_AUOUTR0 Thermal Pad R611 +3.3V_Standby PVDD 10K 1/16W 5% PGND AMP_STB R612 PVCCL R630 Q601 AMP_MUTE 4K7 1/16W 5% MMBT3904 C613 100N 50V NC/100UF 35V NC/100UF 35V C614 C615 100N 50V C619 C612 C617 10K 1/16W 5% C618...
- Page 51 From Main Chip KEY 0-SAR0 KEY 0-SAR0 KEY 1-SAR1 KEY 1-SAR1 IRIN IRIN +3.3V_Standby +3.3V_Standby +3.3V_Standby LEDG LEDG LEDR FB409 LEDR +3.3V_Standby CN401 R456 R457 4K7 1/16W 1% 4K7 1/16W 1% R444 120R/6000mA LED-R NC/10K DGND LED-G R458 IRRX1 POWER_KEY KEY 0-SAR0 LEDG 100OHM...
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Page 52: Power Board
10.2 Power Board 715G6439P01002002M HS9901 heat sink CN9903 NC/CONN FB9901 C9910 NR9901 BEAD SG9901 F9901 NR9902 220PF 250V 2.5R 5A 250V 2.5R NC/DSPL-501N-A21F T5.0AL/250V R9902 C9903 R9901 510K 1/4W 47pF 250V 510K 1/4W BD9901 470NF 275V TS10K80-02 C9905 C9901 R9904 CN9902 510K 1/4W SOCKET... - Page 53 L9801 240UH C9817 D9801 FB9803 NC/47PF KBP206G FB9805 Vsin D9802 BEAD 127R FMNS-1106S Q9801 C9805 C9801 STF24NM60N NC/1UF 450V R9802 D9803 1UF 450V 10R 1/8W 5% RB160M C9814 C9815 C9818 47PF 56uF 500V 56uF 500V R9808 0.07R R9804 R9803 82 OHM R9806 1MOHM +-1% 1/4W 10K OHM +-5% 1/8W...
- Page 54 COLD 12VS L9100 C9109 470UF 25V +12V C9130 new part R9151 Q9105 VCC1 T9101 100N 50V SY NC NC/100KOHM +-5% 1/8W R9124 R9125 NC/P1604ED IC9104 22K 1% 4R7 1/4W 5% C9104 470UF 25V Timing SYNC Pred C9116 MOSG-C NC/1uF C9113 C9120 R9147 L9101...
- Page 55 R8101 HS8102 HEAT SINK D8102 VBoot 0.1R NC/FMX-23S R8102 C8100 HS8103 D8103 HEAT SINK R8104 New Parts Q8101 10 OHM AOTF8N50 UF4007 R8105 R8103 D8101 10 OHM D8104 1.5M 1% 1/4W 1.5M 1% 1/4W SS1060FL T8101 R8107 R8106 1.5M 1% 1/4W IC8101 VLED_A 82 OHM...
- Page 56 J901 J902 J903 J904 J907 J909 J912 JUMPER JUMPER JUMPER JUMPER JUMPER JUMPER JUMPER J913 J914 J915 J916 J919 J920 J921 JUMPER JUMPER JUMPER JUMPER JUMPER JUMPER JUMPER J920 J922 J923 J924 J925 J926 J927 JUMPER JUMPER JUMPER JUMPER JUMPER JUMPER JUMPER J934...
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Page 57: Ir Board
10.3 IR Board 715G6721R02000004I LED201 LED_R CN201 U203 VOUT R201 15K 1/16W 5% IRM-V538M3/TR1 CONN C201 2.2uF 10V T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size TPV MODEL 絬 隔 瓜 絪 腹 02-IR&LED Key Component PCB NAME... -
Page 58: Key Board
10.4 Key Board 715G6715K01002004I SW01 MENU 2.411V 27K 1/10W 1% TACT SW FWRD H1.5MM SW02 INPUT 1.985V 15K 1/10W 1% TACT SW FWRD H1.5MM SW03 VOL+ 1.497V 8K2 1/10W 1% TACT SW FWRD H1.5MM SW04 VOL- 1.070V 4K7 1/10W 1% TACT SW FWRD H1.5MM SW05 0.660V...