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LG LCS310UR Service Manual
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LG LCS310UR Service Manual

LG LCS310UR 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
MODEL: LCS310UR
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN74552093
MARCH, 2011

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Summary of Contents for LG LCS310UR

  • Page 1 Internal Use Only Website http://biz.lgservice.com CAR CD/MP3/WMA RECEIVER SERVICE MANUAL MODEL: LCS310UR CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN74552093 MARCH, 2011...
  • Page 2 CONTENTS SECTION 1 SUMMARY SERVICING PRECAUTIONS ..........................1-2 ESD PRECAUTIONS ............................1-3 SPECIFICATIONS ..............................1-4 LOCATION OF USERS CONTROLS .........................1-5 HOW TO SETTING THE OPTION CODE ......................1-6 FIRMWARE UPGRADE METHOD ........................1-7 HOW TO CONNECT AUDIO SET TO POWER SUPPLY ..................1-8 SECTION 2 ELECTRICAL ELECTRICAL TROUBLESHOOTING GUIDE ....................2-1 1.
  • 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 com- monly are called electrostatically sensitive devices (ESD). Examples of typical ESD devices are integrated circuits and some fi eld-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 Output Power 53 W x 4 CH (Max.) Power Source DC 12 V Speaker impedance 4 Ω Ground System Negative Dimensions (W x H x D) 178 x 50 x 169 mm (Without Control Panel) Net Weight 1.37 kg •...
  • Page 6 LOCATION OF USERS CONTROLS FRONT PANEL O P Q R A SRC/ • OFF K MUTE • When pressed, selects function sources. Temporarily stops the sound. • When pressed and held, powers unit on or off. Activates setting menu. Returns to the previous step. C Volume knob Skip/ Search/ Seek/ Tune •...
  • Page 7 HOW TO SETTING THE OPTION CODE 1. Option Table Option Codes for Car CD products of 2011 will be defi ned as below * OPTION TABLE INDEX AREA OPTION CODE SUFFIX EDEULL* EDZALL* EESPLL* EHUNLL* SUPPORT EMARLL* ESWELL* ETUREL* EZAFLL* SUPPORT ERUSLL* EIRNJL*...
  • Page 8 FIRMWARE UPGRADE METHOD [ MAIN AND CD/USB FIRMWARE UPGRADE ] 1. Confi rmation of version information • Change the Source of audio set to tuner. (Default: tuner) • Turn power off using power key. • Press power key for 5 s. (After power on, continue pressing) •...
  • Page 9 HOW TO CONNECT AUDIO SET TO POWER SUPPLY • It is suffi cient only to supply power for upgrade. • Shown from the right fi gure, connect yellow line (Battery) and red line (Ignition) to plus and minus terminal respectively. •...
  • Page 10 SECTION 2 ELECTRICAL ELECTRICAL TROUBLESHOOTING GUIDE 1. SYSTEM CONTROL ERROR CORRECTION FLOW CHART Something wrong with the System control? No power? Checked the Fuse? F301 Inside of CN302 Checked the Back up CN302(1, 2, 3) VDD and GND? Checked the Regulator IC301(15, 14) Back up VDD? Checked the Main Micom...
  • Page 11 [OPTIONAL] Not available to Remocon? Checked the RC902, R961 Remocon Sense VDD? Checked the R962, IC402(81), PN901(1) Remocon Sense line? Not available to Volume control? Checked the EV901, IC402(82, 83), PN901(6, 7) Encoder volume? Checked the IC402(9, 10), IC802(25, 26) Volume IC control? Not available to Key control? Checked the...
  • Page 12 [OPTIONAL] Not available to Telephone Mute? Checked the ZD499, Q312, Q326, IC402(34) Tel Mute input? Checked the IC402(14, 15), IC802(15) Mute control? Not available to ANT(Motor Type) control? Checked the D430, IC301(12, 13), IC402(33) ANT control? [OPTIONAL] Not available to Remote(Power AMP) control? Checked the CN302(8), Q320, Q319, IC402(36) Remote control?
  • Page 13 2. SOUND ERROR CORRECTION FLOW CHART Something wrong with the Sound? No sounds of All Functions? Checked the IC802(24) E-VR VDD? Checked the IC802(27) E-VR GND? Checked the IC802(25, 26), IC402(9, 10) E-VR control? Checked the E-VR IC802(15), IC402(15) Mute control? IC802(1, 2, 3, 4, 5, 6, 7, 9, Checked the E-VR 18, 19, 20, 21, 22, 23)
  • Page 14 Hearing the Pop Noise? IC402(14, 15, 32), IC802(15), Checked the IC801(22), Q603, Q604, Q605, Q606, Q608 Mute contorl? [OPTIONAL] No Sound External AMP? Checked the IC802(18, 19, 20, 21, 22, 23) Line Out signal? Checked the Line Out Q603, Q604, Q605, Q606, Q608, IC402(15) AMP Mute control? Checked the Line Out JK601...
  • Page 15 ■ CAUTION - Tip for repair Before exchange power amp IC(TB2946) for no audio problem, you have to check below list. 1. Check VCC (pin 20, 6) & GND 2. Check input pin 11, 12, 14, 15 OUT1 + 3. Check Standby, pin 4 PW-GND1 : Follow the below list.
  • Page 16 3. DISPLAY ERROR CORRECTION FLOW CHART Something wrong with the Display? No Display or Some Display is broken? Checked the LCD IC901(56) Driver VDD? Checked the LCD IC901(60) Driver GND? Checked the LCD IC901(57), IC402(79) Driver reset? Checked the LCD IC901(61) Driver OSC? IC402(44, 46, 74, 79), PN901(2, 8, 18, 19),...
  • Page 17 Not available to illumination with button? Checked the Dimmer CN302(7), IC301(9) control input? Checked the IC301(4), Q303, IC402(61) Red LED VDD? Checked the LD923~LD928, LD931~LD940, LD944, LD945 Red LED? Not available to LCD Lighting control? Checked the Dimmer CN302(7), IC301(9) control input? Checked the IC301(4), Q302, IC402(49)
  • Page 18 4. TUNER ERROR CORRECTION FLOW CHART Something wrong with the Tuner system? Not available to Tuner? Checked the IC101(6, 22) Tuner VDD? Checked the Tuner IC301(10, 11), IC402(40), D417 VDD control? Checked the IC101(5, 10, 17, 23) Tuner GND? Checked the E-VR IC802(15), IC402(15) Mute control? Checked the...
  • Page 19 5. CDP ERROR CORRECTION FLOW CHART Something wrong with the CD Player? No Loading? CN520(14, 12) Checked the CD VDD? IC501(4, 5, 7, 9, 12, 44, 49, 51, 74, 77, 81, Checked the CD 102, 104, 116, 117) DSP GND? Checked the Motor IC502(7, 8, 20) DRV VDD?
  • Page 20 No Reading & "FILE CHECK" Display? Checked the CN506(8) Limit switch? Fig 1, 2 Checked the Motor IC502(21) DRV Mute control? Checked the Motor CN520(21, 23) Loading control? Fig 3, 4 Checked the CD CN520(1, 3, 4, 5) DSP control? Checked the IC501(111), IC502(15, 16) Focus control?
  • Page 21 CD no sound? Checked the IC501(46, 47) DSP signal out? No ejected the CD? Checked the IC402(54) Eject key? Checked the Loading CN520(21, 23) Motor control? Fig 3, 4 2-12...
  • Page 22 6. USB ERROR CORRECTION FLOW CHART (OPTIONAL) Something wrong with the USB? Only "NO USB" or "USB CHECK" Display? IC303 Checked the USB VDD? IC501(4, 5, 7, 9, 12, 44, 49, 51, 74, 77, 81, Checked the USB interface IC GND? 102, 104, 116, 117) Checked the USB CN520(19)
  • Page 23 "FILE CHECK" Display? IC501(4, 5, 7, 9, 12, 44, 49, 51, 74, 77, 81, Checked the CD DSP GND? 102, 104, 116, 117) Checked the USB CN520(19) interface IC reset? Checked the X502 DSP X-tal? Checked the CN520(1, 3, 4, 5) DSP control? USB no sound? Checked the CD...
  • Page 24 7. AUX ERROR CORRECTION FLOW CHART Something wrong with the AUX? AUX no sound? JK903, IC802(7, 9), CN971(20, 21, 22), Checked the AUX PN901(3, 4, 5) Signal input? Checked the See the Sound Error correction Process. E-VR & Power AMP? 2-15...
  • Page 25 WAVEFORMS 1. MAIN PART 1) MICOM(IC402) ↔ DISPLAY(PN901) IC402:[PIN46] IC402:[PIN44] IC402:[PIN74] IC402:[PIN79] 2) MICOM(IC402) ↔ TUNER IC(IC101) IC402:[PIN4] IC402:[PIN3] 3) MICOM(IC402) ↔ VOLUME IC(IC802) IC402:[PIN9] IC402:[PIN10] 2-16...
  • Page 26 2. CDP PART Fig.1) SWITCHING CONDITION FOR LOADING Fig.2) SWITCHING CONDITION FOR UNLOADING CN506:[PIN2] CN506:[PIN2] CN506:[PIN1] CN506:[PIN1] CN506:[PIN8] CN506:[PIN8] LOADING S/W LOADING S/W CN506:[PIN11] CN506:[PIN11] 12/8 S/W 12/8 S/W LIMIT S/W LIMIT S/W CHUCKING S/W CHUCKING S/W Fig.3) MOTOR CONTROL SIGNAL FOR LOADING Fig.4) MOTOR CONTROL SIGNAL FOR UNLOADING CN520:[PIN21] CN520:[PIN21]...
  • Page 27 CIRCUIT VOLTAGE CHART IC101 IC301 IC801 PIN NAME VOLTAGE PIN NAME VOLTAGE PIN NAME VOLTAGE TUNER Mode Mode MODE MODE MODE MODE PWR_GND AMRFIN AMRFDEC FREG_B 13.6 STBY FMIN2 FREG_F 1.24 FMIN1 ILL_8.4 14.3 GNDRF CTL4(FREG) VCC2 CD_8 V PWR_GND AMRFAGC DSP_3.3 V RIPPLE...
  • Page 28 IC802 CN402 PIN NAME VOLTAGE PIN NAME VOLTAGE CD_R CD_L AGND BT_R BT_L TUNER_R TUNER_L AGND 3.259 AUX_R LOAD_SW 4.99 AUX_L LG2TA 4.98 AGND 4.98 TA2LG 8.05 BEEP 3.3 V MUTE LRST 4.78 LDOUT OUT_SL OUT_SR RESET 4.98 OUT_RL OUT_RR FEW_IN 4.99 OUT_FL...
  • Page 29 INTERNAL BLOCK DIAGRAM OF ICs 1. IC301 (HA13173AH) 1-1. BLOCK DIAGRAM DBUP 100uF 0.1uF Over voltage detect VBUP 3.5V CTL 1 CBUP 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...
  • Page 30 1-2. PIN FUNCTION (Note1) Protection function Pin No. Pin name Function Normal (Note2) (Note3) (Note3) TSD On VB=24V VB=50V operation Ground FREG_B External Trs bass drive (Note4) On/Off On/Off FREG_F FREG feedback terminal On/Off On/Off ILMOUT 8.4 V output for JLM/500mAmax On/Off CTL4 FREG control terminal...
  • Page 31 2. IC801 (TB2946HQ) 2-1. BLOCK DIAGRAM Ripple Out1 (+) PW-GND1 Out1 (-) Out2 (+) PW-GND2 Pre-GND Out2 (-) Out3 (+) PW-GND3 Out3 (-) AC-GND Out4 (+) PW-GND4 4 Stby Out4 (-) Play Mute 22 Mute Offset/short 2-22...
  • Page 32 3. IC802 (BD3702FV) 3-1. BLOCK DIAGRAM 3-2. PIN DESCRIPTION Terminal Terminal Terminal Terminal Description Description Name Name A input terminal of 1ch MUTE External compulsory mute terminal A input terminal of 2ch LRST Level meter reset terminal B input terminal of 1ch LOUT Output terminal for Level meter B input terminal of 2ch...
  • Page 33 4. IC901 (MC5502) 4-1. PIN CONFIGURATION 4-2. BLOCK DIAGRAM 2-24...
  • Page 34 4-3. PIN DESCRIPTION Pin No. Pin Name Pin Description 1 ~ 12 SEG1/ P1 ~ LCD Segment output pins / General-purpose output pins(Only 1/4Duty Mode) SEG12/ P12 Select Segment output pins or General-purpose output pins by the instruction. 13 ~ 51 SEG13~SEG51 LCD Segment output pins.
  • Page 35 2-26...
  • Page 36 WIRING DIAGRAM B+, ACC, Phone Mute, Dimmer, External Speaker Out, Power Ant Pick Up Motor POWER 17PIN 11PIN * LINE OUT * OPTIONAL HARNESS 4 CH SK101 CN519 CN506 JK601 CN302 30PIN 30PIN MICOM CN402 CN520 8PIN 8PIN USB / CN301 CN599 Tuner Signal...
  • Page 37 BLOCK DIAGRAM LINE-OUT BLOCK LINE_OUT : 2V RL/SW RR/SW TUNER-On-Board NXP Tiger-RDS(IC101) RL/RR : LINE_OUT SUBWOOFER OPTION TEL MUTE PLL TUNING POWER SUPPLY AM TUNER I2C BUS SYSTEM 2.2K 2.2K TELMUTE_3.3V SIGNAL STEREO DECODER IMPROVEMENT 2.2K HIGH CUT FM TUNER CONTROL SOFT MUTE 2.2K...
  • Page 38 CIRCUIT DIAGRAMS 1. MAIN CIRCUIT DIAGRAM MAIN EBY60748501_3_1 2010. 06. 17 2-31 2-32...
  • Page 39 2. FRONT CIRCUIT DIAGRAM FRONT EBY61308501_2_1 2011. 02. 15 2-33 2-34...
  • Page 40 3. CDP CIRCUIT DIAGRAM EBY60708101_4_3 2010. 06. 17 2-35 2-36...
  • Page 41 PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 2-37 2-38...
  • Page 42 2. FRONT P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 2-39 2-40...
  • Page 43 3. CDP P.C.BOARD ( TOP VIEW ) ( BOTTOM VIEW ) 2-41 2-42...
  • Page 44 SECTION 3 EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION Accessory Loc.No. Loc.No. Loc.No. Loc.No. LCD901 FRONT CABLE1 MAIN 290A...
  • Page 45 2. MECHANISM(PICK-UP) SECTION...