LG LAN-8680MH Service Manual
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LG LAN-8680MH Service Manual

Car navigation / dvd player
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P/NO : AFN30824806
DECEMBER, 2006
CAR NAVIGATION /
DVD PLAYER
SERVICE MANUAL
GUIDANCE
Map data and dangerous area information are not newly updated.
You must periodically update the map data.
Refer to the homepage for details on how to update the data.
http:// www. motrex. co. kr
If you have other questions about the Navigation Device, please
refer to troubleshooting Guide or contact your supplier or Technical Support.
MODEL : LAN-8680MH/LAN-8681MH/LAN8682MH
http://biz.lgservice.com

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  • Page 1 Refer to the homepage for details on how to update the data. http:// www. motrex. co. kr If you have other questions about the Navigation Device, please refer to troubleshooting Guide or contact your supplier or Technical Support. P/NO : AFN30824806 DECEMBER, 2006 MODEL : LAN-8680MH/LAN-8681MH/LAN8682MH...

  • Page 2: Front Part

    [CONTENTS] ❍ SECTION 1. SPECIFICATION ❍ SECTION 2. NAME OF EACH PART ❍ SECTION 3. TOTAL WIRING/BLOCK DIAGRAMS ❍ SECTION 4. EXPLODED VIEWS ❍ SECTION 5. FRONT PART ❍ SECTION 6. MAIN PATR ❍ SECTION 7. AUDIO PART ❍ SECTION 8. POWER PART ❍...
  • Page 3 SECTION 1. SPECIFICATION [CONTENTS] • SPECIFICATION ............1-1...
  • Page 4 ❏ SPECIFICATION GENERAL Output Power ..........50W x 4CH (Max.) Power Source .
  • Page 5 - 1-2 -...
  • Page 6 SECTION 2. NAME OF EACH PART [CONTENTS] • FRONT ..............2-1 •...
  • Page 7 ❏ FRONT Power ON/OFF INFO - Changes the display setup. - Turns on/off main unit. AV OFF - Adjusts the volume. - Audio and video pause. L OPEN FM/AM - Selects the band. - Opens the monitor. L TILT M DISC - Selects the disc.

  • Page 8: Rear Connection Diagram

    ❏ REAR CONNECTION DIAGRAM GPS ANT 24 PIN CONNECTOR TV ANT Radio ANT 32 PIN CONNECTOR - 2-2 -...

  • Page 9: Connector Terminal Function

    ❏ CONNECTOR TERMINAL FUNCTION A. 32 PIN CONNECTOR A. 32 PIN CONNECTOR TERMINAL FUNCTION DESCRITION Terminal Name Terminal Name MIC GND EXT MIC AUX V IN AUX IN AUX R IN CAMERA REQ ALT L SPEED AUTO LIGHT REAR CAM B+ CAMERA REVERSE B.
  • Page 10 - 2-4 -...
  • Page 11 SECTION 3. TOTAL WIRING/BLOCK DIAGRAMS [CONTENTS] • WIRING DIAGRAM ............3-1 •...
  • Page 12 ❏ WIRING DIAGRAM LAN8680MH - 3-1 -...
  • Page 13 ❏ BLOCK DIAGRAM (H/W) - 3-2 -...
  • Page 14 ❏ BLOCK DIAGRAM (S/W) Destination - 3-3 -...
  • Page 15 - 3-4 -...
  • Page 16 SECTION 4. EXPLODED VIEWS [CONTENTS] • FRONT PART ............4-1 •...
  • Page 17 ❏ FRONT PART When do P/O, Caution! A42 Front, Trim and GPS Assembly compose. Therefore, 3EA’S PCB Assembly is supplied if request purchase by A42’s P/N. - 4-1 -...

  • Page 18: Cabinet & Main Frame Part

    ❏ CABINET & MAIN FRAME PART When do P/O, Caution! A42 Front, Trim and GPS Assembly compose. Therefore, 3EA’S PCB Assembly is supplied if request purchase by A42’s P/N. Option - 4-2 -...
  • Page 19 - 4-4 -...
  • Page 20 SECTION 5. FRONT PART [CONTENTS] • FRONT SCHEMATIC DIAGRAM ..........5-1 •...

  • Page 21: Front Schematic Diagram

    ❏ FRONT SCHEMATIC DIAGRAM - 5-1 -...

  • Page 22: Trim Schematic Diagram

    ❏ TRIM SCHEMATIC DIAGRAM - 5-2 -...

  • Page 23: Front/Trim Printed Circuit Boards

    ❏ FRONT/TRIM PRINTED CIRCUIT BOARDS • UPPER SIDE • LOWER SIDE - 5-3 -...
  • Page 24 - 5-4 -...

  • Page 25: Table Of Contents

    SECTION 6. MAIN PART [CONTENTS] • MAIN BLOCK DIAGRAM ..........6-1 •...

  • Page 26: Main Block Diagram

    ❏ MAIN BLOCK DIAGRAM - 6-1 -...

  • Page 27: Main Power Block Diagram

    ❏ MAIN POWER BLOCK DIAGRAM - 6-2 -...

  • Page 28: Main Schematic Diagram (Cpu)

    ❏ MAIN SCHEMATIC DIAGRAM (CPU) - 6-3 -...

  • Page 29: Main Schematic Diagram (Flash, Sdram)

    ❏ MAIN SCHEMATIC DIAGRAM (FLASH, SDRAM) - 6-4 -...

  • Page 30: Main Schematic Diagram (Graphic Ic)

    ❏ MAIN SCHEMATIC DIAGRAM (GRAPHIC IC) 10.11 - 6-5 -...

  • Page 31: Main Schematic Diagram (Key Buffer, Uartc, Audio Buffer)

    ❏ MAIN SCHEMATIC DIAGRAM (KEY BUFFER, UARTC, AUDIO BUFFER) - 6-6 -...

  • Page 32: Main Schematic Diagram (Gps, Cfc, Touch Controller)

    ❏ MAIN SCHEMATIC DIAGRAM (GPS, CFC, TOUCH CONTROLLER) - 6-7 -...

  • Page 33: Main Schematic Diagram (Cpld)

    ❏ MAIN SCHEMATIC DIAGRAM (PLD, DVD, TV, BUZZER, FAN) - 6-8 -...

  • Page 34: Main Schematic Diagram (32Pin Con Interface)

    ❏ MAIN SCHEMATIC DIAGRAM (32PIN CON INTERFACE) - 6-9 -...

  • Page 35: Main Waveforms

    ❏ MAIN WAVEFORMS (10) (11) (12) (13) (14) (15) (16) (17) (18) (19) - 6-10 -...

  • Page 36: Ic/Connector Voltage Sheet

    ❏ IC/CONNECTOR VOLTAGE SHEET IC401 VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE IC401 IC466 IC400 VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE VOLTAGE VOLTAGE - 6-11 -...
  • Page 37 IC406 IC103,IC402,IC434,IC453 IC478,IC479 VOLTAGE VOLTAGE PIN VOLTAGE PIN VOLTAGE VOLTAGE PIN VOLTAGE PIN VOLTAGE ANALOG IC404,IC405,IC413 IC409,IC410,IC411,IC412,IC419,IC420 IC421 IC454 VOLTAGE VOLTAGE PIN VOLTAGE PIN VOLTAGE VOLTAGE PIN VOLTAGE PIN VOLTAGE ANALOG ANALOG ANALOG ANALOG - 6-12 -...
  • Page 38 IC418 VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE IC418 IC429 VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE VOLTAGE PIN VOLTAGE - 6-13 -...
  • Page 39 IC430,IC446 IC432 IC431 IC467 VOLTAGE VOLTAGE PIN VOLTAGE PIN VOLTAGE VOLTAGE VOLTAGE ANALOG ANALOG IC433 IC468 IC457 IC461 IC464 IC465 VOLTAGE PIN VOLTAGE VOLTAGE VOLTAGE VOLTAGE VOLTAGE VOLTAGE ANALOG ANALOG ANALOG - 6-14 -...
  • Page 40 IC456 VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PN401 PN402 PN403 VOLTAGE PIN VOLTAGE VOLTAGE PIN VOLTAGE VOLTAGE PIN VOLTAGE ANALOG ANALOG ANALOG ANALOG ANALOG ANALOG ANALOG ANALOG ANALOG - 6-15 -...
  • Page 41 PN404 PN408 PN405 VOLTAGE PIN VOLTAGE VOLTAGE PIN VOLTAGE PIN VOLTAGE VOLTAGE ANALOG PN407 PN409 PN411 VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE ANALOG 1 - 6-16 -...
  • Page 42 PN412 PN413 PN414 PN415 PN416 VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE ANALOG ANALOG 5 ANALOG ANALOG ANALOG ANALOG 7 ANALOG ANALOG ANALOG 8 ANALOG ANALOG 23,24 NC - 6-17 -...

  • Page 43: Main Printed Circuit Board (Upper Side)

    ❏ MAIN PRINTED CIRCUIT BOARD (UPPER SIDE) - 6-18 -...

  • Page 44: Main Printed Circuit Board (Lower Side)

    ❏ MAIN PRINTED CIRCUIT BOARD (LOWER SIDE) - 6-19 -...
  • Page 45 - 6-20 -...
  • Page 46 • AUDIO WAVEFORMS ........... . . 7-9 • LAN-8680MH CONNECTOR (24 PIN) PIN DESCRIPTION ......7-10 •...

  • Page 47: Audio Block Diagram

    ❏ AUDIO BLOCK DIAGRAM - 7-1 -...

  • Page 48: Audio Power Block Diagram

    ❏ AUDIO POWER BLOCK DIAGRAM - 7-2 -...

  • Page 49: Audio Schematicdiagram (Micom)

    ❏ AUDIO SCHEMATIC DIAGRAM (MICOM) - 7-3 -...
  • Page 50 ❏ AUDIO SCHEMATIC DIAGRAM (EQ) - 7-4 -...
  • Page 51 ❏ AUDIO SCHEMATIC DIAGRAM (PLL + SLIDING) - 7-5 -...
  • Page 52 ❏ AUDIO SCHEMATIC DIAGRAM (AUDIO POWER (MAIN)) - 7-6 -...
  • Page 53 ❏ AUDIO SCHEMATIC DIAGRAM (AUDIO POWER (SUB I)) - 7-7 -...
  • Page 54 ❏ AUDIO SCHEMATIC DIAGRAM (AUDIO POWER (SUB 2)) - 7-8 -...

  • Page 55: Audio Waveforms

    ❏ AUDIO WAVEFORMS (10) (11) (12) (13) (14) (15) - 7-9 -...

  • Page 56: Lan-8680Mh Connector (24 Pin) Pin Description

    ❏ LAN-8680MH CONNECTOR (24 PIN) PIN DESCRIPTION PIN # Signal Name Pin Description FRONT_L+ FRT LH SPEAKER, AUDIO SIGNAL OUTPUT + FRT RH SPEAKER, AUDIO SIGNAL OUTPUT + FRONT_R+ REAR__R+ RR RH SPEAKER, AUDIO SIGNAL OUTPUT + RR LH SPEAKER, AUDIO SIGNAL OUTPUT +...

  • Page 57: Audio Ic/Connector Voltage Sheet

    ❏ AUDIO IC/CONNECTOR VOLTAGE SHEET IC201 IC417 IC418 IC110 IC201 PIN# VOLTAGE PIN# VOLTAGE PIN# VOLTAGE PIN# VOLTAGE PIN# VOLTAGE PIN# VOLTAGE PIN# VOLTAGE PIN# VOLTAGE PIN# VOLTAGE PIN# VOLTAGE PIN# VOLTAGE PIN# VOLTAGE PIN# VOLTAGE PIN# VOLTAGE PIN# VOLTAGE PIN# VOLTAGE H/ L...

  • Page 58: Audio Printed Circuit Board (Upper Side)

    ❏ AUDIO PRINTED CIRCUIT BOARD (UPPER SIDE) - 7-12 -...

  • Page 59: Audio Printed Circuit Board (Lower Side)

    ❏ AUDIO PRINTED CIRCUIT BOARD (LOWER SIDE) - 7-13 -...
  • Page 60 - 7-14 -...
  • Page 61 SECTION 8. POWER PART [CONTENTS] • POWER SCHEMATIC DIAGRAM(POWER LINE) ....... . 8-1 •...

  • Page 62: Power Schematic Diagram(Power Line)

    ❏ POWER SCHEMATIC DIAGRAM (POWER LINE) - 8-1 -...

  • Page 63: Power Schematic Diagram(Echo Canceller)

    ❏ POWER SCHEMATIC DIAGRAM (ECHO CANCELLER) - 8-2 -...

  • Page 64: Power Ic/Connector Voltage Sheet

    ❏ POWER IC/CONNECTOR VOLTAGE SHEET IC816 IC820 IC821 IC996 IC809 IC811 PIN 801 PN802 PN803 VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE VOLTAGE VOLTAGE NAME NAME NAME FREQ_SEL D_5V F_SEL BT_PCM_IN BT_PCM_OUT BT_PCM_CLK BT_PCM_SYNC 4V_BACKUP BT_RESET B+_CNTL 4V+BACKUP 3.3V B+MAIN 3.3V IC994 IC995...

  • Page 65: Power Printed Circuit Board (Upper Side)

    ❏ POWER PRINTED CIRCUIT BOARD (UPPER SIDE) - 8-4 -...

  • Page 66: Power Printed Circuit Board (Lower Side)

    ❏ POWER PRINTED CIRCUIT BOARD (LOWER SIDE) - 8-5 -...
  • Page 67 - 8-6 -...
  • Page 68 SECTION 9. TROUBLESHOOTING GUIDE [CONTENTS] • GENERAL PART (NAVIGATION) ..........9-1 •...
  • Page 69 ❏ GENERAL PART (NAVIGATION) Cannot identify the current location. (GPS not receiving) GPS cannot be used indoors and must be connected to the power with ACC to a vehicle in a location where the sky can be seen well. When initially connecting the GPS, it usually takes about 10 minutes to be normally operating, but the connection speed can differ depending on the weather condition and surrounding obstacles.
  • Page 70 The path guide can be different from the actual path. (Path guide error) • When the road is closely parallel. • When the splitting road angle is very small. • When there is an adjacent road when turning. • When driving on a road that is narrowing fast. •...
  • Page 71 Symptom Cause Correction Power doesn’t • Leads and connectors are not • Confirm once more that all turn on. properly connected. connections are correct. The unit doesn’t • The fuse is blown. • Rectify the problem that caused operate. the fuse to blow and then replace it.

  • Page 72: Language Codes

    Language Codes Use this list to input your desired language for the following initial settings: Disc Audio, Disc Subtitle, Disc Menu. Language Code Language Code Language Code Language Code Abkhazian 6566 Fiji 7074 Lingala 7678 Singhalese 8373 Afar 6565 Finnish 7073 Lithuanian 7684...
  • Page 73 Bluetooth phone compatibility list • If even a phone as described in this list meets requirements of Bluetooth Hand-free Profile 1.0 and Object Push Profile 1.1, it can operate. However, it is noted that this function can or can not be supported according to bluetooth phone features. •...
  • Page 74 ❏ AUDIO PART • MICOM DEAD POWER DEAD. POWER DEAD. PRESS RESET KEY. PRESS RESET KEY. CHECK RESET IC CHECK IS MICOM RESET? IS MICOM RESET? (IC101). RESET IC(IC101). • TR (Q407) VOLTAGE • TR (Q407) VOLTAGE MICOM(IC110) MICOM(IC110) CHECK (TP463). POWER INPUT CHECK (TP463).
  • Page 75 • AUDIO OUTPUT DEAD AUDIO OUTPUT DEAD. AUDIO OUTPUT FAILURE • CHECK CABLE CHECK CABLE CN102 CABLE IS CN102 CABLE IS CONNECTION. CONNECTION. PROPERLY CONNECTED NORMAL? • IF DEFECTIVE, IF DEFECTIVE, CONNECTED? CHANGE CABLE. CHANGE CABLE CHECK 3.3V CHECK 3.3V REGULATOR OF Regulator of DSP POWER INPUT...
  • Page 76 • AUDIO OUTPUT FAILURE AUDIO OUTPUT FAILURE. FRONT AND COMPONENT VOLUME CONTROL ASSEMBLY CHECK WORKS NORMAL? AND ADJUST VOLUMEL LEVEL TONE CONTROL AND SOUND TONE SETTING SOUND TONE SETTING BALANCE FADER IS CORRECT? IS CORRECT? SETTING CHECK SHORT TEST FOR EACH OUTPUT EACH CANNEL TERMINAL AND...
  • Page 77 • SLIDING/TILTING FAILURE SLIDING/TILTING FAILURE. MOTOR CONNECT CONNECTOR IS SLIDING MOTOR. CONNECTED NORMAL? SLIDING KEY SLIDING KEY INPUT CHECK INPUT IS NORMAL? (IC417 PIN29,30 (CN103 PIN5,6). T603,604). PHOTO PHOTO INTERRUPT INTERRUPTER SIGNAL INPUT IS NORMAL? (IC417 CHECK (Q101,Q102). PIN4/5 T706.707). CONFIRM WHETHER MOTOR DRIVING MOTOR CABLE OR...
  • Page 78 ❏ FRONT PART • LCD SCREEN (1) LCD SCREEN DEAD. POWER ON TO CHECK POWER ICs OF LCD_8V & BL_8V? AUDIO BOARD (PN801(PIN 3,4,19 )). (IC902,IC903,IC904). DIM ON SIGNAL IS CHECK THE SOLDER OUTPUT? BADNESS OF LEAD ON PN801(5,7PIN : HIGH). IC803 , PN805,PN806.
  • Page 79 • LCD SCREEN (2) LCD SCREEN SYNC HAZARD. LCD_SYNC SIGNAL CHECK SOLDER BADNESS OF OUTPUT IS DETECTED? <15.75KHZ> PN806, PN401, R526(MAIN (CHECK POINT : PN801(18PIN)). PART). FPC CABLE SHORTED? CHECK FPC CABLE SHORT. REPLACE LCD MODULE. - 9-11 -...
  • Page 80 • HOT KEY HOT KEY FAILURE. • CHECK SOLDER BADNESS OF BUTTON. WHEN PRESS KEY, DO PN802’S • CHECK FPC CABLE VOLTAGE DROP? SHORTAGE. CHECK SOLDER BADNESS OF CHECK SOLDER BADNESS OF LEAD ON IC. (IC429 : MAIN OR IC. (IC429 OR IC110) IC110 : AUDIO) CHANGE THE IC.
  • Page 81 • LED LIGHT FAILURE LED LIGHT FAILURE. CHECK SOLDER BADNESS OF LEAD ON CONNECTORS. (IC103,PN802, PN805). CHECK SOLDER BADNESS OF LEAD ON LED AND LINE RESISTOR? CHANGE LED. - 9-13 -...
  • Page 82 • TOUCH PANEL FAILURE TOUCH PANEL FAILURE. IF IS NORMALLY REASSEMBLING IS PULSE’S CHANGE WHEN PRESS TOUCH FPC, CHANGE TOUCH TOUCH PANEL? PANEL. (PN802 PINS 10,11,13). CHECK SOLDER BADNESS OF ARE NO SOLDER BADNESS OF LEAD, THEN CONFIRM WHETHER IC433, X404? X404(PIN3) OUTPUT IS 14.
  • Page 83 ❏ TV PART • TV TROUBLESHOOTING FLOW CHART : TV DISPLAY, SOUND DEAD START. TV MODE CHANGE. PN415 PIN 15 PN415 PIN 15 IC401 FAILURE CHECK VOLTAGE CHECK : B+? VOLTAGE CHECK HIGH (3V) • PN413(PIN 11) FAILURE CHECK DISPLAY •...
  • Page 84 • TV TROUBLESHOOTING FLOW CHART : TV SYSTEM COMMUNCATION FAILURE START. TV MODE CHANGE. SET POWER PARTS PN415 PINS 13,15,16 TV DISPALY CHANGE? FAILURE CHECK VOLTAGE OK? IC432 & PART FAILURE IC432 COMMUNICATION CHECK I/O CHECK? • TV CARD CONNECTION PROBLEM...
  • Page 85 ❏ DVD PART • DVD REPAIR CHANGE TO DVD SCREEN FAILURE PN409,PN411 CONNECTION ERROR? IC453 IS BAD? IC453 IS BAD? PN406 POWER TERMINAL CHECK 1,2 : 10V 5,6 : 1.8V 7,8 : 3.3V 11,12 : 5V SCREEN IS CHANGED BUT DVD PN404 CONNECTION ERROR ? AND CD IS SILENT AUDIO BOARD CHECK...
  • Page 86 ❏ GYRO SENSOR PART • GYRO SENSOR REPAIR DIRECTION DETECTION OF PN406 BAD SOLDERING VEHICLES RUNNING DOES NOT BECOME. 5V POWER SUPPLIED AT AUDIO BOARD 5V PIN 1 OF PN406? POWER TERMINAL BADNESS. PN408 PIN 2 CLOCK WAVE CHNAGE GYRO MODULE FORM IS OUTPUT? CHANGE GPS MODULE - 9-18 -...
  • Page 87 ❏ GPS PART • GPS REPAIR GPS SIGNAL PN405 BAD SOLDERING? RECEIVE FAILURE 3.3V POWER SUPPLIED 3.3V WAVEFORM IS TO PN405 PINS 1,2? OUTPUT ON PN405 PIN4? POWER B/D 3.3V BAD POWER TERMINAL BAD GPS MODULE - 9-19 -...
  • Page 88 - 9-20 -...

This manual is also suitable for:

Lan-8681mhLan8682mh

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