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LG LAC-M9600R Service Manual

Car cd/mp3/wma receiver
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P/NO : AFN31223641
SEPTEMBER, 2006
CAR CD/MP3/WMA
RECEIVER
SERVICE MANUAL
MODELS : LAC-M9600R/LAC-UA96R
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
PWR
R
MIC
OPEN/TILT
MUTE
SRC
XDSS/SRS
EQ
DISP
USB
B.T MENU

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Summary of Contents for LG LAC-M9600R

  • Page 1 CAR CD/MP3/WMA RECEIVER SERVICE MANUAL MODELS : LAC-M9600R/LAC-UA96R CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. OPEN/TILT MUTE XDSS/SRS DISP B.T MENU P/NO : AFN31223641 SEPTEMBER, 2006...
  • Page 2 [CONTENTS] SECTION 1. SUMMARY SERVICING PRECAUTIONS ..........1-2 ESD PRECAUTIONS .
  • Page 3 SECTION 1. SUMMARY SERVICING PRECAUTIONS 1. Always disconnect the power source before: 1) Removing or reinstalling any component, circuit board, module or any other instrument assembly. 2) Disconnecting or reconnecting any instrument electrical plug or other electrical connection. 3) Connecting a test substitute in parallel with an electrolytic capacitor in the instrument. CAUTION: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard.
  • Page 4 ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.
  • Page 5 SPECIFICATIONS • GENERAL CD SELECTION Output Power 60W x 4CH (Max.) Power Source DC 14.4 V 4 Ω Speaker impedance Ground System Negative Dimensions (W x H x D) 180 x 51 x 171 mm (Without Front Panel) Net Weight 2.0 kg •...
  • Page 6 SECTION 2 ELECTRICAL ELECTRICAL TROUBLESHOOTING GUIDE & WAVEFORMS • CHECK POINT Symptom Check Point Curcuit Location No. Remark SYSTEM CONTROL No Power Checked the Fuse. F901 Checked the Back up Vdd, Gnd. CN901(3, 4) Checked the Micom Back Up Vdd. IC901(15, 14) Fig 1 Checked the Micom Ground.
  • Page 7 Symptom Check Point Curcuit Location No. Remark DISPLAY & LIGHTING No Display or Checked the Front Micom Vdd. IC901(7, 9), Some Display is broken IC201(8, 23, 37, 56, 62, 67, 72, 81, 98, 112, 124, 134) Checked the Front Micom Ground. IC201(8, 23, 37, 56, 62, 67, 72, 81, 98, 112, 124, 134) Checked the Front Micom Reset.
  • Page 8 Symptom Check Point Curcuit Location No. Remark CD FUNCTION No Loading/Unloading Checked the CD Vdd. IC371(4, 5, 1, 7), PN502 (8), IC510(19, 20, 59), PN502(1, 2), IC513 (5, 9, 10, 24, 25, 29), PN502 (6), IC512, IC506(19, 20, 27, 47, 58, 76, 77, 93) Checked the CD MICOM, DSP Reset.
  • Page 9 Symptom Check Point Curcuit Location No. Remark USB FUNCTION Only "NO USB" or Checked the USB Vdd. IC512(2), L507, L508, L509, R566 "USB CHECK" Display Checked the USB interface IC reset. IC511(57), IC510(37) Checked the USB interface IC X-tal. X505 Checked the Flash memory CE.
  • Page 10 • WAVEFORMS • Fig 1(Initial connecting the Main Connector and supply of electric power) CH1 X401 CH2 X402 CH3 IC401(10) CH4 Back-Up 5V L403 • Fig 2(Power ON and started the Front Micom Control data) CH1 CN401(2) CH2 CN401(4) CH3 CN401(5) CH4 CN401(6) •...
  • Page 11 • Fig 4(Switch condiotion about Loading) CH1 SW1, R5046 CH2 PN502(2) CH3 PN507(3) CH4 PN505(4) • Fig 5(Loading Motor Control) CH1 IC501(3) CH2 IC501( 2) CH3 PN506(1) CH4 PN506(2) • Fig 6(Switch condiotion about Unloading) CH1 SW1, R5046 CH2 PN502(2) CH3 PN507(3) CH4 PN505(4)
  • Page 12 • Fig 7(Unloading Motor Control) CH1 IC501(3) CH2 IC501( 2) CH3 PN506(1) CH4 PN506(2) • Fig 8(Focus Control) CH1 IC502(22) CH2 IC502(16) CH3 IC502(15) • Fig 9(RF Signal) CH1 IC506(46) CH2 IC506(49)
  • Page 13 • Fig 10(Spindle Control) CH1 PN507(2) CH2 PN50791) CH3 IC506(54) CH4 IC506(21) • Fig 11(Sled Control) CH1 IC510(63), Q1 CH2 IC510(64), Q2 • Fig 12(Sled Control) CH1 PN501(4), A CH2 PN501(3), B CH3 PN501(1), NA CH4 PN501(2), NB...
  • Page 14 • Fig 13(Tracking Control) CH1 PN504(2) CH2 PN504(3) CH3 IC506(24) CH4 R517, T106 • Fig 14(CD DSP Control data - Initial Play) CH1 IC510(57) CH2 IC510(71) CH3 IC510(48) • Fig 15(CD DSP Control data - Initial Play) CH1 IC510(58) CH2 IC510(72) CH3 IC510(70)
  • Page 15 • Fig 16(CD DSP Normal Play) CH1 IC510(40) CH2 IC510(78) CH3 IC510(77) CH4 IC510(76) • Fig 17(CD DSP Normal Play) CH1 IC510(40) CH2 IC510(78) CH3 IC510(77) CH4 IC510(76) • Fig 18(Connecting the USB Device) CH1 PN503(2) CH2 PN503(3) CH3 CN401(16) 2-10...
  • Page 16 • Fig 19(The USB Device audio data interface) CH1 IC506(62) CH2 IC506(63) CH3 IC506(64) • Fig 20(The DAC audio data interface) CH1 IC508(1) CH2 IC508(3) CH3 IC508(2) • Fig 21(The E-VR control data) CH1 IC601(12) CH2 IC601(13) 2-11...
  • Page 17 • Fig 22(The E-VR Level Meter signal data, 1kHz) CH1 IC601(14) SAIN CH2 IC601(16) SAOUT • Fig 23(The Power AMP control data) CH1 IC801(23) CH2 IC801(26) • Fig 24(The BT not pairing Standby data) CH1 IC401(50) CH2 IC401(51) CH3 CN401(19) CH4 CN401(17) 2-12...
  • Page 18 • Fig 25(The BT pairing data) CH1 IC401(50) CH2 IC401(51) CH3 CN401(19) CH4 CN401(17) • Fig 26(The OLED control data) CH1 CN202(12) CH2 CN202(16) CH3 CN202(13) CH4 CN202(15) 2-13...
  • Page 19 • ELECTRICAL TROUBLESHOOTING GUIDE 1. System Control Error correction Flow Chart. Something wrong with the system control? No power? Checked the Fuse? Inside of CN902 F901 Checked the Back up Vdd and Gnd? CN901(4, 3) Checked the Main Micom Back up Vdd? IC901(15, 14) Checked the Main Micom Back up Gnd? IC401(19, 20, 59)
  • Page 20 Something wrong with the system control? Not available to Remocon? Checked the Remocon Sens Vdd? RMC201, R275 Checked the Remocon Sens line? IC201(18) Something wrong with the system control? Not available to Volume control? Checked the Encoder Volume? VOL201, IC201(30, 34) Checked the Volume IC? IC601(12, 13) 2-15...
  • Page 21 Something wrong with the system control? Not available to Key Control? Checked the Tact switch? SW901 ~ SW919 Checked the Key line? IC201(78, 79, 80) Checked the Front Panel Data Interface? CN401(2, 3, 4, 5, 6) Checked the Front Panel Data Interface? IC402, 403 Checked the Front Panel Data Interface? IC401(74, 75, 76, 77, 78)
  • Page 22 Something wrong with the system control? Not available to ANT(Motor Type) Control? Checked the ANT control? CN901(10), IC901(12, 13), IC401(37) Something wrong with the system control? Not available to Remote(Power AMP)? Checked the Remote control? CN901(9), Q907, Q906, IC401(44) 2-17...
  • Page 23 2. Sound Error correction Flow Chart. Something wrong With the Sound? No sounds of All Functions? Checked the E-VR Vdd? IC601(29), IC901(10), Q911, Q912, IC401(38) Checked the E-VR Ground? IC601(10) Checked the E-VR control? IC601(12, 13, 15), IC401(24, 25, 27) Checked the E-VR Signal in/out? IC601(3, 4, 5, 7, 40, 41, 42, 43, 44) Checked the E-VR Mute Control?
  • Page 24 Something wrong With the Sound? Not available to SRS? Checked the SRS Chip VDD? IC651(24) Checked the SRS Chip Ground? IC651(21) Checked the SRS Chip Mode Control IC651(27, 28, 29), IC401(33, 34, 35) Checked the SRS Chip Signal in/out? IC651(42, 43, 31, 32, 33) Something wrong With the Sound? Hearing the Pop Noise? IC801(23, 26, 27), IC401(23, 24, 25, 27, 39, 42,...
  • Page 25 Something wrong With the Sound? No Line out signal? Checked the Line Out AMP Vdd? IC853, IC851(16), IC852(1) Checked the Line Out AMP Ground? IC853, IC851(1,11), IC852(11,14) IC401(30,49),Q863, Q851,Q852,Q853, Checked the Line Out AMP Mute Contorl? Q854,Q151,Q859, Q860,Q861,Q862 IC851(5,7,12,20,3,9 ,13,19), IC852(2,7,12,13), Checked the Line Out AMP Signal in/out? CN151, CN851 Something wrong With the Sound?
  • Page 26 3. Display Error correction Flow Chart. Something wrong with the Display? No Display or Some Display is broken? Checked the Front Micom Vdd? IC901(7, 9), IC201(8, 23, 37, 56, 62, 67, 72, 81, 98, 112, 124, 134) Checked the Front Micom Ground? IC201(8, 23, 37, 56, 62, 67, 72, 81, 98, 112, 124, 134) Checked the Front Micom RESET? IC206, IC210(66)
  • Page 27 Something wrong with the Display? Not avaliable to the PPS or Fail? Checked the Front Panel Operating? See a System error correction Process with the key Checked the File format and USB? Used Recommend File type and USB(See a Checked the MP3 USB Device? See a USB error correction Process.
  • Page 28 4. Tuner Error correction Flow Chart. Something wrong With the Tuner system? Not available to Tuner? TU101(8, 22), Q911, Q912, IC901(10 , 11), Checked the Tuner Vdd? IC401(36, 38), Q401, Q402 Checked the Tuner Ground? TU101(2, 4, 12, 16) Checked the PLL data? TU101(20, 21), IC401(21, 22) Checked the RF signal in? TU101(1)
  • Page 29 Something wrong With the Tuner system? Not available to RDS? Checked the RDS data? TU101(23, 24), IC401(1, 58) 2-24...
  • Page 30 5. CD Error correction Flow Chart. Something wrong With the CD Player? No Loading/Unloading? Checked the Eject Key defact? See a System error correction Process with the key Checked the Loading Motor IC Vdd? IC371(3, 4) Checked the Load/Unload Control? IC371(4, 5, 1, 7) Checked the Front Open/Close SW? SW371, SW372...
  • Page 31 Checked the Motor DRV Vdd? PN502(1, 2), IC513 (5, 9, 10, 24, 25, 29) Checked the Motor DRV Ground? IC513 (16,6,7,21) Checked the CD DSP Vdd? PN502 (6), IC512, IC506(19, 20, 27, 47, 58, 76, 77, 93) Checked the CD DSP Ground? IC506(26,32,47,78, 18) Checked the CD DSP Reset? IC510(57), IC506(72)
  • Page 32 Something wrong With the CD Player? No Reading & "FILE CHECK" DISPLAY? Checked the Limit switch? PN507(3,4) IC510(68) Checked the Motor DRV mute control IC510(56), IC513(13) Checked the Motor LD Control? IC506(42), Q501 Checked the CD DSP Control? IC506 (67,68,69,70,71) Checked the focus control? IC506(25) IC513(17,18) Checked the focus error level out.(FE Mon)?
  • Page 33 Something wrong With the CD Player? No ejected the CD? Checked the Eject key? SW201, IC201(55, 78), IC401(77) Checked the Loading Motor Control? IC510(2,3) IC513(12,14,15) Something wrong With the CD Player? CD no sound? Checked the CD DSP signal out? IC506(73,74,75) Checked the DAC Vcc, Vcom? IC508(6, 10)
  • Page 34 6. USB Error correction Flow Chart. Something wrong With the USB? Only "NO USB" or "USB CHECK" Display? Checked the USB Vdd? IC512(2), L507, L508, L509, R566 Checked the USB interface IC Ground? IC511(17, 37, 40,61, 71) Checked the memory IC Ground? IC505(24) Checked the USB interface IC reset? IC511(57), IC510(37)
  • Page 35 Something wrong With the USB? "FILE CHECK" DISPLAY? Checked the CD DSP Vdd? PN502 (6), IC512, IC506(19, 20, 27, 47, 58, 76, 77, 93) Checked the CD DSP Reset? IC506(72), IC510(57) Checked the CD DSP X-tal? X503 Checked the CD DSP Control? IC506 67,68,69,70,71,72, 73) Fig 15 ~ 16 Checked the USB data?
  • Page 36 Something wrong With the USB? USB no sound? Checked the USB Host Data out? IC511(52,53,54), IC506(62,63,64) Checked the CD DSP signal out? IC506(73,74,75) Checked the DAC Vcc, Vcom? IC508(6, 10) Checked the DAC signal In/out? IC508(1,2,3,7,8) Checked the DAC Mute? IC508(11), IC510(7) Checked the OP AMP VDD? IC301(8)
  • Page 37 7. BT Error correction Flow Chart. Something wrong With the BT? No pairing? Checked the BT Phone List? See the Manual Phone List. Checked the BT module Vdd? IC202(41) Checked the BT module RESET? IC202(40) Checked the BT module data interface? IC202(13,14), IC401(50, 51) Something wrong With the BT? No Sound?
  • Page 38 INTERNAL BLOCK DIAGRAM OF IC’s 1. µPD703134AGJ-014-UEN-A • PIN ASSIGNMENT < Download : FL-PR4 > 1. GND : 9, 38, 99, 113, 135 N.C. (open) 2. /RESET : 66 Mem_Data14 (I /O) N.C. (open) Mem_Data14 (I /O) N.C. (open) Mem_Data13 (I /O) N.C.
  • Page 39 Pin No Name Description Power supply Ground N.C. Not to be used(open) N.C. Not to be used(open) N.C. Not to be used(open) N.C. Not to be used(open) N.C. Not to be used(open) VOLB Volume rotary encoder B terminal signal input N.C.
  • Page 40 Pin No Name Description N.C. Not to be used(open) N.C. Not to be used(open) N.C. Not to be used(open) N.C. Not to be used(open) N.C. Not to be used(open) WAIT Wait signal input from OLED N.C. Not to be used(open) N.C.
  • Page 41 2. WM8731/WM8731L • BLOCK DIAGRAM PIN ASSIGNMENT AVDD CONTROL INTERFACE WM8731 VMID HPVDD Bypass MUTE HPGND AGND ATTEN/ +6 to -73dB MUTE 1 dB Steps Side Tone MICBIAS VOL/ RHPOUT MUTE DRIVER RLINEIN MUTE MUTE MUTE +12 to -34.5dB, 1.5dB Steps ROUT DIGITAL...
  • Page 42 • PIN DESCRIPTION 28 PIN 28 PIN Name Description SSOP DBVDD Supply Digital Buffers VDD CLKOUT Digital Output Buffered Clock Output BCLK Digital Input/Output Digital Audio Bit Clock, Pull Down, (see Note 1) DACDAT Digital Input DAC Digital Audio Data Input DACLRC Digital Input/Output DAC Sample Rate Left/Right Clock, Pull Down (see Note 1)
  • Page 43 3. BA6289F/BA6417F • BLOCK DIAGRAM Vref POWER SAVE DRIVER OUT1 CONTROL LOGIC DRIVER OUT2 T.S.D • PIN ASSIGNMENT IC371 OUT2 OUT1 • PIN DESCRIPTION Pin No Name FUNCTION OUT1 Motor output Motor power supply power supply Logic input Logic input HIGH level output voltage setting OUT2 Motor output...
  • Page 44 4. µPD78F0546(MAIN MICOM) • PIN ASSIGNMENT PRDS_CLK (I) P120/1NTP0/EXLVI6 AVSS PFRT_CLOSE_SW (I) AVREF PFRT_LOAD (O) PRDS_DI (I) IC401 PFRT_UNLOAD (O) PAFS (I) POPT_IN0 (I) PSSTOP (I) uPD78F0546 POPT_IN1 (I) PBLUETOOTH_MUTE (O) POPT_IN2 (I) P10/SCK10/TXD0 DOWNLOAD_CLK POPT_OUT0 (O) P11/SI10/RXD0 DOWNLOAD_DI Downloa d POPT_OUT1 (O) P12/SO10 DOWNLOAD_DO...
  • Page 45 • PIN DESCRIPTION Pin No Name Description PRDS_CLK From tuner pack, RDS clock input(Tuner Pack 24pin) FR_CLOSE Front Motorizing Close Switch Input(SW372) FR_LD+ Front motorizing driver I.C Load Control Output(IC371 4pin) FR_LD- Front motorizing driver I.C Unload Control Output(IC371 5pin) OPT_IN0 For diode option check, signal 1 or 2 input0 OPT_IN1...
  • Page 46 Pin No Name Description TU_ADJCH Tuner ADJCH for adjacent Ch. Level(TU101 9pin) TU_AMST_MP Tuner AMST_MP for Multi-path Ch.(TU101 10pin) TU_QUALITY Tuner QUALITY(TU101 13pin) PWR_SENSE BACKUP Port Monitoring signal input CD_ZERO CD ZERO-MUTE Input(CN301 7pin, IC510 8pin) FRT_OPEN FRONT MOTORIZING OPEN SWITCH INPUT(SW371) CD_RST CD MCU RESET Control Output(CN301 16pin, IC510 10pin) CD_CLK...
  • Page 47 5. MN6627956 • PIN ASSIGNMENT 2-42...
  • Page 48 • BLOCK DIAGRAM 2-43...
  • Page 49 • PIN DESCRIPTION 2-44...
  • Page 50 2-45...
  • Page 51 2-46...
  • Page 52 6. µPD78F0546(CDP MICOM) • PIN ASSIGNMENT 2-47...
  • Page 53 • PIN DESCRIPTION Pin No Name Description I_BACKUP CD MCU Hold Mode Control Input(PN502 16pin, IC401 47pin) O_LOAD CD Disc load control(IC513 12pin) O_UNLOAD CD Disc unload control(IC513 12pin) I_8CM_SW deck switch 2(8cm disc detection) I_CHUCK_SW deck switch 3(disc chucking detection) I_DAC_ZERO From DAC(IC508 11pin) Audio Zero Mute Signal Input O_ZERO_MUTE...
  • Page 54 Pin No Name Description I_Q2 sled Q2 voltage detect Not to be used(open) Not to be used(open I_PC DSP Sindle Motor Drive Signal Monitor(IC506 22pin) I_LMT_SW DECK Limit switch O_USB_POWER USB Device Power Control(PN501 23pin, IC903 1pin) O_CD_CLK Serial interface to DSP(IC506 67pin) I_CD_STAT Serial interface to DSP(IC506 70pin) O_CD_DATA...
  • Page 55 7. NJM2160B • GENERAL DESCRIPTION The NJM2160B is a dual boost amplifier designed for car audip system. It expands the frequency characteristics by high slew rate. It can swing 14V peak-to-peak output voltage at 9V. It consists of two channel non-inverting amplifier with the gain of 8dB. It is suitable for car audio system and other boost amplifier system.
  • Page 56 8. HA13173AH • BLOCK DIAGRAM DBUP VBUP Sense over voltage 3.5V CBUP CTL 1 100uF BIAS 1.5V CTL 2 2.5V CTL 3 VDDOUT CVDD 2.5V 10uF CTL 4 2.5V DSPOUT CDSP EXTOUT DEXT1 10uF DEXT2 CDOUT CEXT 10uF ILMOUT 0.1uF CILM 0.1uF AUDIOOUT...
  • Page 57 • PIN DESCRIPTION Protection Pin No Pin Name Specification Normal TSD ON VB=24V VB=50V Ground FREG_B External Trs. based operation on/off on/off FREG_F FREG feed back terminal on/off on/off ILMOUT 8.4V output for ILM/500mA max on/off CTL4 FREG control terminal CDOUT 8.0V output for CD/1.3A max on/off...
  • Page 58 BLOCK DIAGRAMS 2-53 2-54...
  • Page 59 SCHEMATIC DIAGEAMS 1. MAIN SCHEMATIC DIAGEAM 2-55 2-56...
  • Page 60 2. CD SCHEMATIC DIAGEAM 2-57 2-58...
  • Page 61 3. FRONT SCHEMATIC DIAGEAM 2-59 2-60...
  • Page 62 4. SUB SCHEMATIC DIAGEAM 2-61 2-62...
  • Page 63 5. USB SCHEMATIC DIAGEAM 2-63 2-64...
  • Page 64 VOLTAGE SHEET MODE MODE MODE MODE MODE MODE MODE NAME TUNER NAME TUNER NAME TUNER NAME TUNER NAME TUNER NAME TUNER NAME TUNER PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. IC201 IC202 HPGND 0.01 DQ13 P/G-UPGRAD...
  • Page 65 MODE MODE MODE MODE MODE MODE NAME NAME TUNER NAME TUNER NAME NAME TUNER NAME TUNER PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. -LIN 3.39 0.00 0.00 OUT LF_ 6.69 IN L-REAR 6.54 VSSQ 0.04 -RIN 3.39 OUTLR...
  • Page 66 BASIS EE Mode EE Mode Tran- sistor TUNER TUNER TUNER Q102 0.01 0.01 -0.53 -0.94 0.01 0.01 Q103 -0.55 -0.95 0.01 0.01 0.01 0.00 Q104 -0.48 -0.95 0.01 0.01 0.01 0.00 Q151 0.01 0.01 -0.41 -0.53 0.01 0.01 Q651 4.21 4.22 4.22 4.23...
  • Page 67 PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C.BOARD DIAGRAM( TOP VIEW ) 2-71 2-72...
  • Page 68 2. MAIN P.C.BOARD DIAGRAM( BOTTOM VIEW ) 2-73 2-74...
  • Page 69 3. FRONT P.C.BOARD DIAGRAM( TOP VIEW ) 4. FRONT P.C.BOARD DIAGRAM( BOTTOM VIEW ) 2-75 2-76...
  • Page 70 5. CD P.C.BOARD DIAGRAM( BOTTOM VIEW ) 5. CD P.C.BOARD DIAGRAM( BOTTOM VIEW ) 2-77 2-78...
  • Page 71 EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION OPTIONAL PART A46B Accessory MAIN PN151 A46A PN851...
  • Page 72 2. MECHANISM(PICK-UP) SECTION...

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