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LG SH33SU-S Service Manual
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LG SH33SU-S Service Manual

Dvd/cd receiver
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Internal Use Only
Website http://biz.lgservice.com
DVD/CD RECEIVER
SERVICE MANUAL
HT303SU
HT353SD
MODEL: HT303SU(SH33SU-S, SH33SU-W)/
P/NO : AFN33723386
JANUARY, 2008
HT353SD(SH33SD-S, SH33SD-W)

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  • Page 1 Internal Use Only Website http://biz.lgservice.com DVD/CD RECEIVER SERVICE MANUAL HT303SU HT353SD MODEL: HT303SU(SH33SU-S, SH33SU-W)/ P/NO : AFN33723386 JANUARY, 2008 HT353SD(SH33SD-S, SH33SD-W)

  • Page 2: Table Of Contents

    ....... . 5-1 Copyright © 2008 LG Electronics. Inc. All right reserved.

  • Page 3: Section 1. General

    (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 4 7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin. Armband Resistor (1 Mohm) Resistor Conductive (1 Mohm) Sheet Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 5: Esd Precautions

    THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 6 <B> Spain, Portugal, Greece, Italy (LGEES) <C> Hungary, Czech Republic (LGEMK) Change will be applied when power <D> Romania (LGERO) OFF-->ON. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 FLD ‘write ok’ or ‘up ok’ Remote control ‘2’ + Front ‘STOP’ push same timing FLD display E2P CLR or EP CLR Auto power off LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 8: How To Update Audio Micom & Dvd Programs

    5. Remove and reconnect the power cable when it changes to logo screen from upgrade information. Then the upgrade process is completed. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 9: Specifications

    (W x H x D) Net Weight (1EA) 0.35 kg 3.5 kg Designs and specifications are subject to change without notice. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 10: Section 2. Electrical Part

    Check focus circuit. Check disc. Check tracking servo circuit. Does it play? Does it output Check audio circuit. audio? Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 Check if the remote Check if Check pattern and resoldering control is ok? RC2 is ok? Front B/D ok. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 12 Refer to MICOM circuit. control waveform of PN301 pin5 is ok? Check if RC2 voltage is ok(5V)? Check RM circuit Resolder or Replace RC2. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 2. System operation routine loop. 1. Stop Playback & Open Tray. 2. Display tray open message & LOGO. Receive CLOSE Key? LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 14 2. Check system reset circuit. Update 3. Check FLASH R/W enable signal PRD, FLASH successfully? RWR. 4. Check FLASH Memory related circuit. Replace FLASH. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 Check the Tray control MOTOR LOAD+ & LOAD-signal? & SERVO circuit IC401. Check AV cable connection between main PCBA and loader. (MECHA) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 16 Check the amp circuit on motor Proper F+ & F- outputs? driver. Check cable connection with pick-up head. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 Check the spindle control amp SPNN output circuit of motor driver. properly? Check the cable connection between spindle and main PCB. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 18 Check the tracking control amp TR+ & TR-output circuit on motor driver. properly? Check cable connection on pick-up head. Disc Playback? Check RF signal waveform. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 PWM.(Check Audio out PWM IC out?(IC704). Pins 55, 59, 61, 62, 68, 71, 75). Check Digital Amp circuit TEST END. (IC702, IC703). LGE Internal Use Only 2-10 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 20 Replace IC101. "LOW" signal(0V)? Replace the Q701 and Q702. Is the Q701 and Q702 normal? Replace ST AMP IC(IC702 and IC703) Copyright © 2008 LG Electronics. Inc. All right reserved. 2-11 LGE Internal Use Only Only for training and service purposes...
  • Page 21 IC101 Pin9,36,59 are Check 3.3V line. high(5V). Check Check power section if IC101 Pin49 Check SMPS. circuit. is high. Replace IC101. LGE Internal Use Only 2-12 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 22: Details And Waveforms On System Test And Debugging

    1) MT1389/L main clock is at 27MHz(X501) FIG 1-1 2) MT1389/L reset is high active. Power Cord in FIG 1-2 IC501 Copyright © 2008 LG Electronics. Inc. All right reserved. 2-13 LGE Internal Use Only Only for training and service purposes...
  • Page 23 3) Flash R/W enable signal during download(Downloading) FIG 1-4 2. SDRAM CLOCK 1) MT1389/L main clock is at 27MHz(X501) DCLK = 93MHz, Vp-p=2.2, Vmax=2.7V FIG 2-1 LGE Internal Use Only 2-14 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 24 3. TRAY OPEN/CLOSE SIGNAL 1) Tray open/close waveform 2) Tray close waveform FIG 3-1 FIG 3-2 3) Tray open waveform FIG 3-3 Copyright © 2008 LG Electronics. Inc. All right reserved. 2-15 LGE Internal Use Only Only for training and service purposes...
  • Page 25 4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) FIG 4-1 LGE Internal Use Only 2-16 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 26 5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION) FIG 5-1 6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION) FIG 6-1 Copyright © 2008 LG Electronics. Inc. All right reserved. 2-17 LGE Internal Use Only Only for training and service purposes...
  • Page 27 7. DISC TYPE JUDGEMENT WAVEFORMS FIG 7-1 (DVD) IC501 FIG 7-2 (DVD) IC501 LGE Internal Use Only 2-18 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 28 FIG 7-3 (CD) IC501 FIG 7-4 (CD) IC501 Copyright © 2008 LG Electronics. Inc. All right reserved. 2-19 LGE Internal Use Only Only for training and service purposes...
  • Page 29 8. FOCUS ON WAVEFORMS IC501 FIG 8-1 (DVD) FIG 8-2 (CD) LGE Internal Use Only 2-20 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 30 9. SPINDLE CONTROL WAVEFORMS (NO DISC CONDITION) FIG 9-1 10. TRACKING CONTROL RELATED SIGNAL(System checking) IC501 FIG 10-1(DVD) Copyright © 2008 LG Electronics. Inc. All right reserved. 2-21 LGE Internal Use Only Only for training and service purposes...
  • Page 31 FIG 10-2(CD) 11. MT1389/L VIDEO OUTPUT WAVEFORMS 1) Full colorbar signal(COMPOSIT) FIG 11-1 LGE Internal Use Only 2-22 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 32 2) Y IC501 FIG 11-2 12. AUDIO OUTPUT FROM mt1389/L 1) Audio related Signal ASDATA3 IC501 FIG 12-1 Copyright © 2008 LG Electronics. Inc. All right reserved. 2-23 LGE Internal Use Only Only for training and service purposes...
  • Page 33 • R720 → TP711 • R704 → TP707 • R709 → TP713 R717 → TP705 • R707 → TP702 • R701 → TP708 LGE Internal Use Only 2-24 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 34 LDO2 AVDD33_2 RAS# CAS# TRAY_OPEN RWE# TRAY_CLOSE FG / GPIO2 USB_DP USB_DM VDD33_USB DVDD33 VSS33_USB RA11 PAD_VRT RCLK VDD18_USB DQM1 Copyright © 2008 LG Electronics. Inc. All right reserved. 2-25 LGE Internal Use Only Only for training and service purposes...
  • Page 35 Audio ADC IR/VFD USB 2.0 High USB 2.0 High Speed / Full Speed controller Device MS/SD/MMC MS/SD/MMC Card Controller Flash Card LGE Internal Use Only 2-26 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 36 Full scale adjustment (suggest to use 560 ohm) DACVSSC Ground Ground pin for video DAC circuitry CVBS Analog Analog composite output Copyright © 2008 LG Electronics. Inc. All right reserved. 2-27 LGE Internal Use Only Only for training and service purposes...
  • Page 37 AGND18 Analog Ground Analog Ground General Power/ Ground (7) 54, 90 DVDD18 Power 1.8V power pin for internal digital circuitry LGE Internal Use Only 2-28 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 38 Data mask 0 4mA, PD InOut RD15 DRAM data 15 InOut RD14 DRAM data 14 InOut RD13 DRAM data 13 Copyright © 2008 LG Electronics. Inc. All right reserved. 2-29 LGE Internal Use Only Only for training and service purposes...
  • Page 39 GPIO (6) 1) GPIO8 2) MS_BS set A InOut 3) SD_CLK set A GPIO8 4mA, PD 4) ASDATA2 5) ACLK LGE Internal Use Only 2-30 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 40 2mA, PD 2) GPIO12 1) GPIO13 InOut 2) SD_D0 set B GPIO13 4mA, PD 3) ALRCK 4) Audio Mute 5) YUVCLK Copyright © 2008 LG Electronics. Inc. All right reserved. 2-31 LGE Internal Use Only Only for training and service purposes...
  • Page 41 2. IC401 MOTOR DRIVER • PIN CONFIGURATION • BLOCK DIAGRAM LGE Internal Use Only 2-32 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 42 1. IC501 MPEG(MT1389L) • PIN DESCRIPTION Copyright © 2008 LG Electronics. Inc. All right reserved. 2-33 LGE Internal Use Only Only for training and service purposes...
  • Page 43 P26/INT5/T1IN LC87F5M64A P25/INT5/T1IN P24/INT5/T1IN/INT7 V DD 1 P23INT4/T1IN P80/AN0 P22/INT4/T1IN P81/AN1 P21/INT4/T1IN P82/AN2 P20/INT4/T1IN/INT6 P10/SO0 P07/T7O P11/SI0/SB0 P06/T6O Top view LGE Internal Use Only 2-34 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 44 INT0 to INT7 Timer 7 Noise filter Port 3 Base timer Stack pointer PWM2/3 Port C UART1 Watchdog timer UART2 On-chip Debugger Copyright © 2008 LG Electronics. Inc. All right reserved. 2-35 LGE Internal Use Only Only for training and service purposes...
  • Page 45 INT5 enable enable enable disable disable INT6 enable enable enable disable disable INT7 enable enable enable disable disable LGE Internal Use Only 2-36 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 46 Must be set for oscillation and kept open if not to be used. Input Ceramic resonator input pin Output Ceramic resonator output pin Copyright © 2008 LG Electronics. Inc. All right reserved. 2-37 LGE Internal Use Only Only for training and service purposes...
  • Page 47 AIN2A PGAOUTA AIN2B AIN6B AIN1A AIN6A AIN1B MICBIAS 13 14 15 16 17 18 19 20 21 22 23 24 LGE Internal Use Only 2-38 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 48 10 µF 0.1 µF 2.2nF 2.2nF 47 µF 0.1 µF AFILTA AFILTB AGND * Capacitors must be C0G or equivalent DGND Copyright © 2008 LG Electronics. Inc. All right reserved. 2-39 LGE Internal Use Only Only for training and service purposes...
  • Page 49 Interrupt (Output) - Indicates an interrupt condition has occurred. OVFL Overflow (Output) - Indicates an ADC overflow condition is present. LGE Internal Use Only 2-40 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 50 SCK/SCL Reset & Power Down Interface Internal Controls SI/I2C_AD0 PWM_SWL_P/M C, SPI) /CS/I2C_AD2 EPD_ENA EXT_MUTE Power Supply Crystal Oscillator OVERLOAD Copyright © 2008 LG Electronics. Inc. All right reserved. 2-41 LGE Internal Use Only Only for training and service purposes...
  • Page 51 User can set this sub-channel data input pins to PCM serial data output pins. See the Control Register Description part. Schmitt-Trigger input LGE Internal Use Only 2-42 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 52 Assert ‘HIGH’ for SPI mode. De-assert ‘LOW’ for I2C mode. Internal pull-down resistor. SO/SDA SO for SPI mode or SDA for I2C mode. Copyright © 2008 LG Electronics. Inc. All right reserved. 2-43 LGE Internal Use Only Only for training and service purposes...
  • Page 53 0V and 5V. The output-only pins are not 5V tolerant and the buses they are connected to can swing only between 0V and 3.3V. LGE Internal Use Only 2-44 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 54 WIRING DIAGRAM CABLE1 PN202 2007. 11. 30 2-45 2-46 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 55 OVERALL BLOCK DIAGRAM 2007. 11. 30 2-47 2-48 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 56 Parts that are shaded are critical 2007. 11. 30 NOTE) With respect to risk of fire or NOTE) electricial shock. 2-49 2-50 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 57 2. MPEG CIRCUIT DIAGRAM 2007. 11. 30 2-51 2-52 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 58 3. SERVO CIRCUIT DIAGRAM 2007. 11. 30 2-53 2-54 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 59 4. MICOM CIRCUIT DIAGRAM 2007. 11. 30 2-55 2-56 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 60 5. I/O CIRCUIT DIAGRAM 2007. 11. 30 2-57 2-58 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 61 6. AMP CIRCUIT DIAGRAM 2007. 11. 30 2-59 2-60 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 62 7. MIC CIRCUIT DIAGRAM 2007. 11. 30 2-61 2-62 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 63 8. FRONT CIRCUIT DIAGRAM 2007. 11. 30 2-63 2-64 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 64 9. PWR KEY CIRCUIT DIAGRAM 2007. 11. 30 2-65 2-66 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 65 10. MIC & USB & PTB CIRCUIT DIAGRAM 2007. 11. 30 2-67 2-68 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 66 PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C. BOARD DIAGRAM ( TOP VIEW ) 2-69 2-70 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 67 MAIN P.C. BOARD DIAGRAM ( BOTTOM VIEW ) 2-71 2-72 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 68 2. SMPS P.C. BOARD DIAGRAM NOTE: Warning Parts that are shaded are critical With respect to risk of fire or electrical shock. 2-73 2-74 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 69 TIMER P.C BOARD DIAGRAM (HT353) 4. KEY P.C. BOARD DIAGRAM (HT303) KEY P.C. BOARD DIAGRAM (HT353) 5. FRONT JACK P.C. BOARD DIAGRAM 2-75 2-76 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 70 • CABINET AND MAIN FRAME SECTION TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. PN302 CABLE1 PN202 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 71 • DECK MECHANISM EXPLODED VIEW(DP-12TV) 015B 015A 012A LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 72 • PACKING ACCESSORY SECTION OPTIONAL PART 818 PORTABLE IN CABLE BATTERY REMOTE CONTROL 825 FM WIRE ANTENNA OWNER'S MANUAL PACKING, CASING PACKING, CASING Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 73 CENTER SPK R.L SPK R.R SPK WIRE80 F.L SPK WIRE81 F.R SPK WIRE82 CENTER SPK WIRE83 R.L SPK WIRE84 R.R SPK LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 74 CENTER SPK R.L SPK R.R SPK WIRE80 F.L SPK WIRE81 F.R SPK WIRE82 CENTER SPK WIRE83 R.L SPK WIRE84 R.R SPK Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 75 3. PASSIVE SUBWOOFER(SH33SU-W/SH33SD-W) WIRE90 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 76 1. DECK MECHANISM EXPLODED VIEW (DP-12TV) ......4-6 Copyright © 2008 LG Electronics. Inc. All right reserved.

  • Page 77: Deck Mechanism Parts Locations

    When reassembling, perform the procedure in reverse order. The “Bottom” on Disassembly column of above Table indicates the part should be disassembled at the Bottom side. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 78: Deck Mechanism Disassembly

    1) Turn the Plate Clamp to counterclockwise direction and then lift up the Plate Clamp. 1-1-2. Magnet Clamp 1-1-3. Clamp Upper Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 79: Base Assembly Sled

    1) Release the Scerw(S3) 1) Release 4 Screw(S2). 2) Disconnect the FFC Connector(C1) 4. Rubber Rear (Fig. 4-3) 3-1. Gear Feed 3-2. Gear Middle LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 80: Frame Assembly Up/Down

    11. Base Main(Fig. 4-4) 1) Unlock the Locking Tab(L4) in direction of arrow(B) and then separate the Gear Pulley from the Base Main. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 81: Deck Mechanism Exploded View (Dp-12Tv)

    DECK MECHANISM EXPLODED VIEW (DP-12TV) 015B 015A 012A LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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