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Hitachi LE40TF07A Service Manual

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* SERVICING NOTICES...........................2-4
* PRODUCT SPECIFICATIONS...............5
* FUNCTIONAL OVERVIEW....................6-8
* CONNECTIONS.....................................9-10
* BLOCK DIAGRAMS...............................14-16
Mar 2012
Contents
LCD Television with LED Back Light
SC
No. 0075E
LE40TF07A
* SCHEMATIC DIAGRAMS......................17-25
Power PCB Board.............................17-18
Main PCB Board................................19-24
Others................................................25
* TROUBLESHOOTING............................26-29
* PRINTED CIRCUIT BOARDS.................30-33
* PEPLACEMENT PART LISTS................34-40

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  Summary of Contents for Hitachi LE40TF07A

  • Page 1: Table Of Contents

    No. 0075E LE40TF07A Contents * SERVICING NOTICES......2-4 * SCHEMATIC DIAGRAMS......17-25 * PRODUCT SPECIFICATIONS....5 Power PCB Board......17-18 * FUNCTIONAL OVERVIEW....6-8 Main PCB Board........19-24 Others..........25 * CONNECTIONS........9-10 * MECHANICAL EXPLODED VIEW..11 * TROUBLESHOOTING......26-29 * PRINTED CIRCUIT BOARDS....30-33 * DISASSEMBLY INSTRUCTIONS..12-13 * PEPLACEMENT PART LISTS....34-40 * BLOCK DIAGRAMS.......14-16...
  • Page 2 SERVICING NOTICES ON CHECKING 1. KEEP THE NOTICES 6. PERFORM A SAFETY CHECK AFTER SERVICING As for the places which need special attentions, they are indicated with the labels or seals on the Confirm that the screws, parts and wiring which cabinet, chassis and parts.
  • Page 3: Servicing Notices

    Servicing Notices A. REMOVAL AND INSTALLATION OF 3. When IC starts moving back and forth easily after FLAT PACKAGE IC desoldering completely, pickup the corner of the IC using tweezers and remove the IC by moving with the IC REMOVAL desoldering machine.
  • Page 4 Servicing Notices B. INSTALLATION 4. When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a 1. Take care of the polarity of new IC and then install the Thintip Soldering Iron. (Refer to Fig. 2-8.) new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily.
  • Page 5 LE40TF07A Model Name Panel Size Approx. 40 inches 1920 x 1080 Power Requirement AC 110-240V, 50/60Hz 91W / 0.5W Audio Output 9W + 9W Dimension With Stand 965.9 x 656.7 x 281.6 (WxHxD) Without 965.9 x 603.6 x 64.1 Stand 15.2 kg...
  • Page 6 Functional Overviews Power/Stand by Indicator Standby Mode - RED Power On - BLUE Remote Cont rol Sensor Input Select/OK ( / OK ) Menu ( Channel Up/D o wn ( Works as Up/D own cursor on TV me nu. Volume Up/D own ( Works as Left/Right cursor on TV me nu.
  • Page 7: Functional Overview

    Functional Overviews Remote Control Button Description Teletext Buttons These buttons are to be used in Teletext operation. Media Buttons These buttons are to be used in Media Operation. Power On / Standby Press to switch on the TV. Press again to s by mode.
  • Page 8 Functional Overviews Remote Control (continue) Button Description Input Select ( Press to select the input source. To select an input source 1. Press to display input source list. 2. Press to select the desired input source and press OK Picture Size ( To select the desired picture size.
  • Page 9: Connections

    Connections Connecting Antenna Cable Connect the 75 ohm coaxial cable (commercially available) to the antenna input terminal. To obtain better picture quality, use an outdoor antenna. If your outdoor antenna uses 75 ohm coaxial cable with an F-type connector, connect it directly to the antenna input terminal at the rear panel.
  • Page 10 Connections Connecting External Equipment (continue) To use Component Video terminal (rear) (top side) (bottom side) COMPONENT VIDEO OUT [Example] DVD Player AUDIO To use Composite Video terminal VIDEO OUT [Example] VCR Player AUDIO (rear) (top side) (bottom side) To use PC terminal You can also connect a PC with DVI or HDMI output to this TV.
  • Page 11: Mechanical Exploded View

    Mechanical Exploded View Note : The detail part number and descritpion of the mechanical parts, please referto page 40 103C 102C 103C of this Service Manual. 103C 102B 103C 103C MAIN001 103C (MAIN UNIT) PCB270 103C 102A (OPERATION PCB ASS'Y) 102D 103B 103A...
  • Page 12: Disassembly Instructions

    Disassembly Instructions 1. REMOVAL OF MECHANICAL PARTS 1-3: MAIN UNIT (Refer to Fig. 1-3) AND P.C. BOARDS 1. Disconnect the following connectors: (CP2804, CP2805, CP3801, CP3802, CP7603 and CP7604) CAUTION 2. Remove the 2 screws (1). Be careful not to remove the LVDS cable forcibly, because 3.
  • Page 13 Disassembly Instructions 1-5: REMOCON PCB (Refer to Fig. 1-5) 1. Remove the 3 screws (1). 2. Remove the Angle Hing in the direction of arrow (A). 3. Remove the Remocon PCB in the direction of arrow (B). Angle Hing Remocon PCB Fig.
  • Page 14 BLOCK DIGARAM <Remocon PCB> <Remocon PCB> <Operation PCB> <Operation PCB> Remoco Remoco Remocon Remocon 受光部 受光部 Key A Key A Key B Key B <LCD Panel> <LCD Panel> <MAIN PCB> <MAIN PCB> Remocon In Remocon In Key A/Key B Key A/Key B SCALER+LVDS+AUDIO HDMI 1 DECORDER+MPEG...
  • Page 15: Block Diagrams

    Block Diagram LCD PANEL CD3804 SPEAKER CD301 CP3804 CN23 CP3802 CP3801 MAIN UNIT REMOCON2 PCB CP7603 J3801 POWER PCB CP7604 OPERATION PCB - 15 -...
  • Page 16 Block Diagram INTERCONNECTIONS CD3801 CP3801 CP3002 J3801 GND/KEY_B/RELAY_H RELAY H INVERTER_H BL ON CP2805 BL ADJ LIGHT_CTL VCC-Panel POWER_FAIL VCC-Panel POWER_ON_H PW ON SOUND_GND CD3804 SOUND_GND SOUND_+B AMP+18V RXE4- SOUND_+B AMP+18V RXE3- FOR 32W CCFL SW_+12V SW+12V RXEC+ CP3804 SW_+12V/GND SW+12V B/L_+24V RXE2-...
  • Page 17 330 1/4W R3853 KTA1664-Y-RTF/P POWER_ON-H PS2561AL1-1-V(W) 10K 1/4W R3820 1K 1/16W SW+24V 2.2K 1/4W OVP PROTECT Q3811 KTA1504S_Y_RTK OVP PROTECT Q3809 D3823 SOFT SWITCH KTC3875S_Y_RTK Q3807 KTC3875S_Y_RTK MTZJ30B Circuit Diagram of LE40TF07A (01/09) AC Line & PFC - 17 -...
  • Page 18 1SS133 FEED BACK W807 FB+12V IC3808 CD3804 PS2561AL1-1-V(W) E82E3501 R3890 R3892 R3894 D3833 FB+24V 2.2K 1/4W 100 1/16W 2.2K 1/16W 1SS133 C3854 R3893 Circuit Diagram of LE40TF07A (02/09) 0.047 10K 1/16W Power Suppies VOLTAGE CTL IC3805 KIA431A-AT - 18 -...
  • Page 19: Schematic Diagrams

    L ocation ho le L ocation ho le L ocation ho le R2 7 BL _ADJ 1K ohm R2 8 BL _ADJ/ Circuit Diagram of LE40TF07A (03/09) T.MS 6M181.15A 11372 10K ohm MA RK MA RK MA RK MA RK MA RK...
  • Page 20 R 59 4K7 ohm C VB S3 68ohm 33pF XTALO GI N2M R 60 68ohm R 61 4K7 ohm Circuit Diagram of LE40TF07A (04/09) B L_ADJ/ R 56 C VB S4 1Mohm 33pF XTALI MCU MST6M181VS - 20 - 24MHz...
  • Page 21 33pF NC /ICVL 0518030FR R 117 15Kohm C131 P C_LIN/ R 118 HS _VGA PC_HS R 121 100ohm EJ-3 525-5P 12Kohm Circuit Diagram of LE40TF07A (05/09) R 122 C134 2K2 ohm 33pF NC /ICVL 0518030FR AV Terminals - 21 -...
  • Page 22 RX5 V2 _DDC_ SCL NC/36K ohm DDC CL K RX5 V2 _DDC_ SDA R1 46 DDC DA TA Circuit Diagram of LE40TF07A (06/09) HDM I2_5VI N NC/10K ohm HOTPL UG 2 HP DET HDMI Terminals & Switching SHEL L 3...
  • Page 23 T1 04 T1 05 R16 0 IF _AGC IF _AGC/ +33V T1 06 IF _AGC C160 100ohm IF _AGC T1 07 5V TV V CC NC/CDT-3 SP5I2-36 F02WT-3 DS -E Circuit Diagram of LE40TF07A (07/09) Tuner & IF - 23 -...
  • Page 24 TE ST1 100uF-16V 47K ohm VS A2 VS B2 C184 C185 C186 C187 ROUT- CH8 010U-220K -045-G C188 Circuit Diagram of LE40TF07A (08/09) C189 C241J334J2SC320 Audio Amp. & Headphone C241J334J2SC320 R188 CH8 010U-220K -045-G 8R2 ohm C190 ROUT+/ - 24 -...
  • Page 25 5.6K 1/16W 2.7K 1/16W 2.7K 1/16W 1K 1/16W KEY-A KEY A 100 1/16W R7606 R2202 W837 100 1/16W 12K 1/16W CD2817 E8231804 PCB270 CEL738 PCBDA0 CEL741 Circuit Diagram of LE40TF07A (09/09) Remote Control, LED Indicator, AV Key - 25 -...
  • Page 26 TROUBLESHOOTING (LCD SECTION) - 26 -...
  • Page 27 TROUBLESHOOTING - 27 -...
  • Page 28 TROUBLESHOOTING - 28 -...
  • Page 29 TROUBLESHOOTING - 29 -...
  • Page 30: Main Pcb Board

    PRINTED CIRCUIT BOARDS Main PCB Board (Front) - 30 -...
  • Page 31 PRINTED CIRCUIT BOARDS Main PCB Board (Pattern) - 31 -...
  • Page 32 PRINTED CIRCUIT BOARDS Power/Remocon/Operation PWB SOLDER SIDE SW2203 L3803 C3814 B3806 SW2205 D3815 C3820 W002 W007 W003 D3814 L3802 SW2206 C3809_1 D3811 W011 SW2202 W805 R3819 R3833 D3805 IC3801 D3832 SW2207 D3812 W020 D3831 W009 R3815 C3806_1 W010 D3823 SW2208 R3817 D3833 W812...
  • Page 33 PRINTED CIRCUIT BOARDS Power/Remocon/Operation PWB PAL/NTSC CEL739A R7604 CEL741A R7605 PAL/NTSC R7607 R7606 R3916 R3824 C3849 C3845 C3844 C3847 R3882 W806 R3880 CEL737A C3848 PAL/NTSC C3842 R3881 C3841 R3870 R3885 C3881 R3865 C3840 C3839 C3838 C3837 R3886 R3874 R3871 C3836 C3914 R3864 R3862...
  • Page 34 Replacement Part List (LE40TF07A) The following service parts list are available for purchase. Serviceman may quote the components shown in this page for servicing purposes. PRODUCT SAFETY NOTE : Components marked with a have special characteristics important to safety. The use of a substitute replacement part which does not have the same safety characteristics may create shock, fire or other hazards.
  • Page 35 REPLACEMENT PART LIST (MAIN PWB ASSY) The components shown in this page served as a reference only, it is not meant for ordering. Do not quote any components from these lists. Cct. Part No Description Part No Description C229 05.02.02.0069 Capacitor 1uF -0603 ±10% 25V Capacitors 05.02.02.0056...
  • Page 36 REPLACEMENT PART LIST (MAIN PWB ASSY) The components shown in this page served as a reference only, it is not meant for ordering. Do not quote any components from these lists. Cct. Part No Description Part No Description 05.02.02.0055 Capacitor 0.047uF -0402 ±10% 16V R143 05.01.01.0218 Resistor 10Kohm -0402 ±5% 1/16W...
  • Page 37 REPLACEMENT PART LIST (MAIN PWB ASSY) The components shown in this page served as a reference only, it is not meant for ordering. Do not quote any components from these lists. Cct. Part No Description Part No Description 05.01.01.0229 Resistor 200Kohm -0402 ±5% 1/16W Diodes &...
  • Page 38 REPLACEMENT PART LIST (Power PWB, Operation PWB, RC PWB) The components shown in this page are served as a reference only, it is not meant for ordering. Do not quote any components from these lists. & RANSFORMERS R3876 R3K78AR12J R,METAL OXIDE 0.12 OHM 2W ! T3802 048728004H...
  • Page 39 REPLACEMENT PART LIST (Power PWB, Operation PWB, RC PWB) The components shown in this page are served as a reference only, it is not meant for ordering. Do not quote any components from these lists. DIODES MISCELLANEOUS D3832 D1VT001330 DIODE,SILICON 1SS133T-77 TH3801 57237S0479M000...
  • Page 40 REPLACEMENT PART LIST (Mechanical Parts) The components shown in this page are served as a reference only, it is not meant for ordering. Do not quote any components from these lists. 7A708A905A FRONT C 8110K3080U SCREW TAP TITE(P) LAMI HEAD 101A 708WPDA711 8109I30A0U...
  • Page 41 SC No. 0075E LE40TF07A Copyright Digital Media Systems Group, (2012) All rights reserved...