LG LAC5800(R) Service Manual
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LG LAC5800(R) Service Manual

Car cd/mp3/wma receiver
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Internal Use Only
Website http://biz.lgservice.com
CAR CD/MP3/WMA
RECEIVER
SERVICE MANUAL
MODELS : LAC5800(R)/LAC5810/LAC-UA580R
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN36957742
FEBRUARY, 2008

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Summary of Contents for LG LAC5800(R)

  • Page 1 Internal Use Only Website http://biz.lgservice.com CAR CD/MP3/WMA RECEIVER SERVICE MANUAL MODELS : LAC5800(R)/LAC5810/LAC-UA580R CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN36957742 FEBRUARY, 2008...

  • Page 2: Table Of Contents

    5. AUX P.C. BOARD............................2-49 SECTION 3 EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION....................3-1 2. MECHANISM(PICK-UP) SECTION ......................3-3 SECTION 4 REPLACEMENT PARTS LIST ..........4-1 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 3: Section 1 Summary

    Further check the insulation between the blades of attachment plug and accessible conductive parts. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 4: Esd Precautions

    THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 5: Specifications

    20 Hz-20 kHz S/N Ratio 80 dB Distortion 0.12 % Channel Separation (1kHz) 45 dB Max Input Level (1kHz) 1.2V (35KΩ) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 6: Firmware Upgrade Method

    (more then 2 sec) until “CHECK CD” Display Therefore pay lots of attention for power not to on the LCD. be off. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 • Press SRC key for 5 secs. After power is on, continue pressing. And then the audio set is changed to USB upgrade mode. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 8: How To Connect Audio Set To Power Supply

    (It is okay up to 12V.) Power Supply has a variety of shapes and capacity of voltage and current. At first check these things. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 10: Section 2 Electrical

    Not avaliable to Remote Checked the Remote Control. IC301(2), CN406(1), Q311 (Power AMP) 10 No output Beep sound. Checked the Beep Control. IC402(80), R801 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 Checked the Tuner Signal Out. TU201(10,11,12), IC601(10,11) Checked the AF mute. TU201(8), IC402(7) Not available to RDS Checked the RDS data. TU201(19,20), IC402(5,6) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 12 : Prevent crack of solder line. : PW-GND Picture 1) Power IC desc. * Keep changed IC, We request that you send it to HQ. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Cdp Part

    Fig 1, 2 Checked the Loading Motor Control? CN520(12,17) Fig 3, 4 Checked the 12/8Cm sens switch? CN506(1) Fig 1, 2 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 14 Checked the spindle motor control? IC503(41), IC504(11,12) Fig 7 Checked the SLED control? IC503(40), IC504(13,14) Fig 8 Checked the tracking control? IC503(39), IC504(17,18) Fig 6 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 Something wrong With the CD Player? No ejected the CD? Checked the Eject key? CN403(1)[MAIN] Checked the Loading Motor Control? CN520(12,17) Fig 3,4 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 16: Usb Part

    X701 Checked the D+/D Port? IC711(38,37) Fig 13 Checked the USB indication Port? PN703(4) Checked the USB interface IC control? IC711(9,10,11,14) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 USB no sound? Checked the CD DSP signal out? IC503(140,141) Something wrong with the USB? Checked the CD DSP signal out? IC503(140,141) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 18: Circuit Voltage Chart

    CN302_ISO 16Pin 6.56 6.57 6.53 6.54 IC801_TB2926 6.54 6.546 13.47 6.56 6.53 6.56 6.58 13.96 14.05 6.54 0.01 6.53 8.05 6.47 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 19: Waveforms

    CN520:[PIN12] CN520:[PIN17] CN520:[PIN17] Fig.5) FOCUS CONTROL SIGNAL Fig.6) TRACKING CONTROL SIGNAL IC503:[PIN38] IC503:[PIN39] IC503:[PIN17] IC503:[PIN25] IC504:[PIN15] IC504:[PIN17] IC504:[PIN16] IC504:[PIN18] FE[RFMON] LGE Internal Use Only 2-10 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 20 Fig.12) FSEQ, WRQ IC503:DO(PIN87) CN520:(PIN24) IC503:DI(PIN86) CN520:(PIN25) IC503:CL(PIN85) IC503:CE(PIN84) Fig.13) USB PN703:PIN8 [D+] PN703:PIN10 [D-] PN703:PIN1 [UART RX] PN703:PIN2 [UART TX] Copyright © 2008 LG Electronics. Inc. All right reserved. 2-11 LGE Internal Use Only Only for training and service purposes...

  • Page 21: Internal Block Diagram Of Ics

    CDOUT CEXT 10uF ILMOUT 0.1uF CILM 0.1uF AUDIOOUT FREG B CAUDIO 10uF QFREG RFREG3 FREG F CFREG RFREG1 10uF RFREG2 LGE Internal Use Only 2-12 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 22 (pin14) output circuits are built-in overcurrent protection circuit based on the respective output current. These over- current protection circuits limit the current with a curve shape of “7” in the voltage-current graph. This prevents IC destruction due to overcurrent. Copyright © 2008 LG Electronics. Inc. All right reserved. 2-13 LGE Internal Use Only...

  • Page 23: Ic402 (Μpd78F1165)

    31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 LGE Internal Use Only 2-14 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 24 CMOS Backlight control output 50 AVREF0 • D/A converter reference voltage input • Positive power supply for P110, P111, and D/A converter Copyright © 2008 LG Electronics. Inc. All right reserved. 2-15 LGE Internal Use Only Only for training and service purposes...
  • Page 25 98 EVSS0 Ground Potential for Ports 99 VDD Positive power supply (+5V) 100 EVDD0 Positive power supply (+5V) For Ports LGE Internal Use Only 2-16 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 26: Ic503 (Lc786923W)

    3. IC503 (LC786923W) 3-1. PIN ASSIGNMENT Copyright © 2008 LG Electronics. Inc. All right reserved. 2-17 LGE Internal Use Only Only for training and service purposes...
  • Page 27 3-2. BLOCK DIAGRAM LGE Internal Use Only 2-18 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 28 3-3. DESCRIPTION Copyright © 2008 LG Electronics. Inc. All right reserved. 2-19 LGE Internal Use Only Only for training and service purposes...
  • Page 29 LGE Internal Use Only 2-20 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 30 Copyright © 2008 LG Electronics. Inc. All right reserved. 2-21 LGE Internal Use Only Only for training and service purposes...

  • Page 31: Ic504 (Am5810)

    LEVEL SHIFT 7.5K LEVEL LOADING PRE SHIFT FWD REV LEVEL 7.5K SHIFT PREVCC POWVCC12 POWER (PRE, LOADING) (CH1, CH2) SAVE LGE Internal Use Only 2-22 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 32 Inverting input of CH4 OP-AMP OPIN4 ( + ) Not inverting input of CH4 OP-AMP BIAS Input for reference voltage Copyright © 2008 LG Electronics. Inc. All right reserved. 2-23 LGE Internal Use Only Only for training and service purposes...

  • Page 33: Ic601 (Bd3805F)

    Mute Mute Input Selector (4 stereo include 1 isolation input) 50k 50k VCC/2 100k 100k 100k 100k 100k 100k AGND LGE Internal Use Only 2-24 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 34: Ic801 (Tb2926Hq)

    Out2 (-) Out3 (+) PW-GND3 Out3 (-) AC-GND Out4 (+) PW-GND4 4 Stby Out4 (-) Play Mute 22 Mute Offset/short Copyright © 2008 LG Electronics. Inc. All right reserved. 2-25 LGE Internal Use Only Only for training and service purposes...

  • Page 35: Ic901 (Pt6524)

    SG29 SG28 COM2 COM3 SG27 COM4 SG26 SG25 PT6524 VDD1 SG24 SG23 VDD2 SG22 SG21 /INH SG20 SG19 SG18 SG17 LGE Internal Use Only 2-26 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 36: Block Diagram

    “LOW”. If this pin is set to “HIGH” (VDD), the display is turned ON. (see Note) Chip Enable Pin Clock Input Pin Data Input Pin Copyright © 2008 LG Electronics. Inc. All right reserved. 2-27 LGE Internal Use Only Only for training and service purposes...
  • Page 37 LGE Internal Use Only 2-28 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 38 BLOCK DIAGRAM 2-29 2-30 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 39: Circuit Diagrams

    CIRCUIT DIAGRAMS 1. MAIN CIRCUIT DIAGRAM 2-31 2-32 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 40: Front Circuit Diagram

    2. FRONT CIRCUIT DIAGRAM 2-33 2-34 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 41: Cdp-1 Circuit Diagram

    3. CDP-1 CIRCUIT DIAGRAM 2-35 2-36 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 42: Cdp-2 Circuit Diagram

    4. CDP-2 CIRCUIT DIAGRAM 2-37 2-38 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 43: Aux Circuit Diagram

    5. AUX CIRCUIT DIAGRAM 2-39 2-40 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 44: Main P.c.board(Top View)

    MAIN PRINTED CIRCUIT DIAGRAMS 1. MAIN P.C. BOARD (TOP VIEW) 2-41 2-42 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 45: Main P.c.board(Bottom View)

    2. MAIN P.C. BOARD (BOTTOM VIEW) 2-43 2-44 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 46: Front P.c.board

    3. FRONT P.C. BOARD (TOP VIEW) (BOTTOM VIEW) 2-45 2-46 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 47: Cdp P.c.board

    4. CDP P.C. BOARD 2-47 2-48 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 48: Aux P.c. Board

    5. AUX P.C. BOARD (TOP VIEW) (BOTTOM VIEW) 2-49 2-50 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 49: Section 3 Exploded Views

    1. CABINET AND MAIN FRAME SECTION Accessory Loc.No. Loc.No. Loc.No. Loc.No. Loc.No. Loc.No. Loc.No. Loc.No. Loc.No. Loc.No. Loc.No. Loc.No. FRONT LCD901 CABLE2 CABLE3 CABLE1 MAIN LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 50: Mechanism(Pick-Up) Section

    2. MECHANISM(PICK-UP) SECTION Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 51 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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Lac5810Lac-ua580r

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