LG LHT754 Training Manual
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LG LHT754 Training Manual

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LG TRAINING MANUAL
LHT754 Home Theater - Fall 2007

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Summary of Contents for LG LHT754

  • Page 1 LG TRAINING MANUAL LHT754 Home Theater - Fall 2007...
  • Page 2 Special components are also used to prevent shock and fire hazard and are required to maintain safe performance. No deviations are allowed without prior approval by LG Electronics. Service work should be performed only after you are thoroughly familiar with these safety checks and servicing guidelines.

  • Page 3: Table Of Contents

    Table of conTenTs SPECIFICATIONS ......................... OPERATION ..........................5 FRONT PANEL/REAR PANEL .................5 REMOTE CONTOL ....................6 INSTALLATION AND SETUP ...................7 HDMI CONNECTION .....................0 LANGUAGE MENU .................... DISPLAY MENU .....................3 AUDIO MENU ......................4 LOCK ........................7 OTHERS .........................8 CIRCUIT DESCRIPTIONS ....................9 MAIN BLOCK DIAGRAM ..................9 POWER KEY CIRCUIT DIAGRAM .................0 SMPS (POWER) CIRCUIT DIAGRAM .............. POWER INTERFACE CIRCUIT DIAGRAM ...............

  • Page 4: Specifications

    specificaTions GENERAL Power supply Refer to main label Power consumption Refer to main label Net Weight 3.9 kg External dimensions (W x H x D) 430 x 70 x 310 mm Operating conditions Temperature: 5°C to 35°C, Operation status: Horizontal Operating humidity 5% to 85% CD/DVD...
  • Page 5 specificaTions SPEAKERS Front/Rear Speaker Center speaker Passive Sub- woofer (SH92SB-S) (SH92SB-C) (SH92SB- Type 1 Way 1 Speaker 2 Way 3 Speaker 1 Way 1 Speaker Impedance 4 Ω 4 Ω 3 Ω Frequency Response 120 - 18000 Hz 80 -18000 Hz 40 - 1500 Sound Pressure Level 83 dB/W (1m)

  • Page 6: Operation

    operaTion Front Panel/Rear Panel LHT 754 Home Theater in a Box Training Operation...

  • Page 7: Remote Contol

    operaTion Remote Control Remote Control POWER OPEN/CLOSE (Z) Opens and closes the disc tray. TUNER Selects the System’s tuner (FM ,AM and TUNER OPEN/CLOSE POWER Selects the output source (CD/DVD). bands). iPod Selects the iPod source. Selects input source. iPod S-TITLE DIMMER Selects a subtitle language (DVD).

  • Page 8: Installation And Setup

    operaTion Installation and Setup Rear of DVD/CD Receiver Video connection Connect the MONITOR OUT jack from the DVD/CD Receiver to the VIDEO IN jack on the TV using the video cable supplied (V). Component Video (Color Stream®) connection Connect the COMPONENT VIDEO OUT jacks from the DVD/CD Receiver to the corresponding jacks on the TV using a Y PB PR cable (C).
  • Page 9 operaTion Removing the USB Device from the unit . Choose a different function mode or press STOP(x) twice in a row. . Remove the USB device from the unit. AUX IN connection (A) Connect an Output of auxiliary device to the AUX AUDIO Input (L/R) Connector.
  • Page 10 operaTion Antenna Connection Connect the AM Loop antenna to the AM antenna connector. Connect the FM Wire antenna to the FM antenna connector. Speaker System Connection Connect the speakers using the supplied speaker wires. LHT 754 Home Theater in a Box Training Operation...

  • Page 11: Hdmi Connection

    operaTion HDMI Connection About HDMI HDMI (High Definition Multimedia Interface) supports both video and audio on a single digital connec- tion for an easy all- digital output to an HDMI or DI-equipped TV. Connection to an HDMI TV requires an HDMI cable while connection to a DVI-equipped TV requires a DVI adapter besides a HDMI cable. HDMI has the capability to support standard, enhanced, or high-definition video plus standard to multi-channel surround-sound audio, HDMI features include uncompressed digital video, a bandwidth of up to 5 gigabytes per second, one connector (instead of several cables and connector), and com-...
  • Page 12 operaTion Resolution setting You can change the resolution for the COMPONENT VIDEO OUT by pressing RESOL. on the Remote Control. Available resolution settings are as shown below. Composite Video The composite video output can only support the 480i format video resolution. Component Video The component (YPbPr) video output is capable of supporting 480i, 480p, 70p, and 080i format video resolutions.

  • Page 13: Language Menu

    operaTion LANGUAGE MENU Select a language for the Setup menu and then on-screen display. DISC AUDIO / SUBTITLE / MENU Select the language you prefer for the audio track (disc audio), subtitles, and the disc menu. Original – Refers to the original language in which the disc was recorded.
  • Page 14 operaTion DISPLAY MENU TV Aspect 4:3 - Select when a standard 4:3 TV is connected. 6:9 – Select when a 6:9 wide TV is connected. Display Mode The Display Mode setting works only when the TV aspect mode is set to “4:3”. Letterbox - Displays a wide picture with bands on the upper and lower portions of the screen.

  • Page 15: Audio Menu

    operaTion AUDIO MENU Each DVD disc has a variety of audio output options. Set the receiver’s AUDIO options according to the type of audio system you use. Dynamic Range Control (DRC) With the DVD * format, you can hear a program’s soundtrack in the most accurate and realistic presentation, thanks to digital audio technology.
  • Page 16 operaTion 5.1 Speaker Setup Make the following settings for the built-in 5. channel surround decoder. .Press ENTER, and the 5. Speaker Setup menu appears. .Use b/B to select the desired speaker. 3.Adjust options using v/V/b/B buttons. 4.Press ENTER to confirm your selection. Returns to the previous menu. Speaker selection Select a speaker that you want to adjust.
  • Page 17 operaTion Volume Press to adjust the output level of the selected speaker. (-5dB ~ 5dB) Distance If you connected speakers to your DVD/CD Receiver, setting the Distance lets the speakers know how far the sound has to travel to reach your set listening point. This allows the sound from each speaker to reach the listener at the same time.

  • Page 18: Lock

    operaTion LOCK (Parental Control) Rating Blocks playback of rated DVDs based on their contents. Not all discs are rated. .Select “Rating” on the LOCK menu then press . .To access the LOCK options, you must input the password you have created. If you have not yet entered password, you are prompted to do so.

  • Page 19: Others

    operaTion OTHERS DivX(R) Registration We provide you the DivX®VOD (Video On Demand) registration code that allows you to rent and purchase videos based on the DivX®VOD service. For more information, visit www.divx.com/vod. . Select “DivX(R) Registration” option and then press . .

  • Page 20: Circuit Descriptions

    circuiT descripTions CIRCUIT DESCRIPTIONS MAIN BLOCK DIAGRAM LHT 754 Home Theater in a Box Training Circuit Descriptions...

  • Page 21: Power Key Circuit Diagram

    circuiT descripTions POWER KEY CIRCUIT DIAGRAM LHT 754 Home Theater in a Box Training Circuit Descriptions...

  • Page 22: Smps (Power) Circuit Diagram

    CirCuit desCriptions SMPS (POWER) CIRCUIT DIAGRAM NOTE) Warning NOTES) Symbol denotes AC ground. NOTE) Parts that are shaded are critical NOTE) With respect to risk of fire or NOTES) Symbol denotes DC chassis ground. NOTE) electricial shock. LHT 754 Home Theater in a Box Training Circuit Descriptions...
  • Page 23 CirCuit desCriptions POWER INTERFACE CIRCUIT DIAGRAM LHT 754 Home Theater in a Box Training Circuit Descriptions...
  • Page 24 CirCuit desCriptions MAIN MICOM CIRCUIT DIAGRAM LHT 754 Home Theater in a Box Training Circuit Descriptions...

  • Page 25: Servo Circuit Diagram

    CirCuit desCriptions SERVO CIRCUIT DIAGRAM LHT 754 Home Theater in a Box Training Circuit Descriptions...

  • Page 26: I/O Section Diagram

    CirCuit desCriptions I/O SECTION DIAGRAM LHT 754 Home Theater in a Box Training Circuit Descriptions...

  • Page 27: Mic/Usb/Ptb Circuit

    CirCuit desCriptions MIC/USB/PTB CIRCUIT DIAGRAM LHT 754 Home Theater in a Box Training Circuit Descriptions...

  • Page 28: Timer Circuit Diagram

    CirCuit desCriptions TIMER CIRCUIT DIAGRAM LHT 754 Home Theater in a Box Training Circuit Descriptions...

  • Page 29: Hdmi Circuit Diagram

    CirCuit desCriptions HDMI CIRCUIT DIAGRAM LHT 754 Home Theater in a Box Training Circuit Descriptions...

  • Page 30: Xm Ready Circuit Diagram

    CirCuit desCriptions XM READY CIRCUIT DIAGRAM LHT 754 Home Theater in a Box Training Circuit Descriptions...

  • Page 31: Mpeg Circuit Diagram

    CirCuit desCriptions MPEG CIRCUIT DIAGRAM LHT 754 Home Theater in a Box Training Circuit Descriptions...

  • Page 32: Dsp Circuit Diagram

    CirCuit desCriptions DSP CIRCUIT DIAGRAM LHT 754 Home Theater in a Box Training Circuit Descriptions...

  • Page 33: Amp Circuit Diagram

    CirCuit desCriptions AMP CIRCUIT DIAGRAM LHT 754 Home Theater in a Box Training Circuit Descriptions...

  • Page 34: Waveforms

    CirCuit desCriptions WAVEFORMS 1. SYSTEM 27MHz CLOCK, RESET, FLASH R/W SIGNAL 1) ES8381 main clock at 27MHz (X501). 2) ES8381 reset is active high. LHT 754 Home Theater in a Box Training Circuit Descriptions...
  • Page 35 CirCuit desCriptions 3) Flash R/W enable signal during download. 2. SDRAM CLOCK 1) ES8381 main clock is at 27MHz (X501). LHT 754 Home Theater in a Box Training Circuit Descriptions...
  • Page 36 CirCuit desCriptions 3. TRAY OPEN/CLOSE SIGNAL 1) Tray open/close waveform. 2) Tray close waveform. LHT 754 Home Theater in a Box Training Circuit Descriptions...
  • Page 37 CirCuit desCriptions 3) Tray open waveform. 4. SLED CONTOL RELATED SIGNAL (NO DISC CONDITION) LHT 754 Home Theater in a Box Training Circuit Descriptions...
  • Page 38 CirCuit desCriptions 5. LENS CONTROL RELATED SIGNAL (NO DISC CONDITION) 6. LASER POWER CONTOL RELATED SIGNAL (NO DISC CONDITION) LHT 754 Home Theater in a Box Training Circuit Descriptions...
  • Page 39 CirCuit desCriptions 7. DISC TYPE JUDGEMENT WAVEFORMS LHT 754 Home Theater in a Box Training Circuit Descriptions...
  • Page 40 CirCuit desCriptions DISC TYPE JUDGEMENT WAVEFORMS (Continued) LHT 754 Home Theater in a Box Training Circuit Descriptions...
  • Page 41 CirCuit desCriptions 8. FOCUS ON WAVEFORMS LHT 754 Home Theater in a Box Training Circuit Descriptions...
  • Page 42 CirCuit desCriptions 9. SPINDLE CONTROL WAVEFORMS (NO DISC CONDITION) 10. TRACKING CONTROL RELATED SIGNAL (SYSTEM CHECKING) LHT 754 Home Theater in a Box Training Circuit Descriptions...
  • Page 43 CirCuit desCriptions TRACKING CONTROL RELATED SIGNAL (SYSTEM CHECKING) (Continued) 11. ES8381 VIDEO OUTPUT WAVEFORMS 1) Full colorbar signal (COMPOSITE). LHT 754 Home Theater in a Box Training Circuit Descriptions...
  • Page 44 CirCuit desCriptions 2) Y. 12. AUDIO OUTPUT FROM PWM IC 1) Audio L/R. LHT 754 Home Theater in a Box Training Circuit Descriptions...
  • Page 45 CirCuit desCriptions 2) Audio related Signal. 13. DVD & AMP WAVEFORMS LHT 754 Home Theater in a Box Training Circuit Descriptions...
  • Page 46 CirCuit desCriptions FRONT CIRCUIT (1/2) LHT 754 Home Theater in a Box Training Circuit Descriptions...

  • Page 47: Troubleshooting

    troubleshooting TROUBLESHOOTING POWER SUPPLY LHT 754 Home Theater in a Box Training Troubleshooting...

  • Page 48: Front Circuit

    troubleshooting FRONT CIRCUIT (1/2) *1: When it is needed to reconnect FFC cable into PN301 short pin 1 of PN103 with pin 18 of CN901 in amp. *2: PN603 pins. PIN1: -35VKK PIN2: -30FL+ PIN3: -33FL- PIN7: PIN13: +5VA LHT 754 Home Theater in a Box Training Troubleshooting...

  • Page 49: Front Circuit (/)

    troubleshooting FRONT CIRCUIT (2/2) LHT 754 Home Theater in a Box Training Troubleshooting...

  • Page 50: Amp Protection

    troubleshooting AMP PROTECTION LHT 754 Home Theater in a Box Training Troubleshooting...

  • Page 51: System Operation Flow

    troubleshooting SYSTEM OPERATION FLOW LHT 754 Home Theater in a Box Training Troubleshooting...

  • Page 52: Test & Debug

    troubleshooting TEST & DEBUG FLOW LHT 754 Home Theater in a Box Training Troubleshooting...
  • Page 53 troubleshooting LHT 754 Home Theater in a Box Training Troubleshooting...
  • Page 54 troubleshooting LHT 754 Home Theater in a Box Training Troubleshooting...
  • Page 55 troubleshooting LHT 754 Home Theater in a Box Training Troubleshooting...
  • Page 56 troubleshooting LHT 754 Home Theater in a Box Training Troubleshooting...
  • Page 57 troubleshooting LHT 754 Home Theater in a Box Training Troubleshooting...

  • Page 58: Audio Micom Circuit (Dvd & Amp)

    troubleshooting AUDIO MICOM CIRCUIT (DVD & AMP) LHT 754 Home Theater in a Box Training Troubleshooting...

  • Page 59: Disassembly

    disassembly DISASSEMBLY WIRING DIAGRAM LHT 754 Home Theater in a Box Training Disassembly...

  • Page 60: Exploded View (Main Frame)

    disassembly EXPLODED VIEW (MAIN FRAME) LHT 754 Home Theater in a Box Training Disassembly...

  • Page 61: Exploded View (Deck Mechanism)

    disassembly DECK MECHANISM EXPLODED VIEW LHT 754 Home Theater in a Box Training Disassembly...
  • Page 63 2007 LHT754 Home Theater Training...

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