LG FA162 Service Manual
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LG FA162 Service Manual

Micro hi-fi system
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See also: Owner's Manual
Internal Use Only
Website http://biz.lgservice.com
Micro Hi-Fi System
SERVICE MANUAL
MODEL: FA162
(FA162N, FAS162F)
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN75914299
JANUARY, 2013

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  • Page 1 Internal Use Only Website http://biz.lgservice.com Micro Hi-Fi System SERVICE MANUAL MODEL: FA162 (FA162N, FAS162F) CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN75914299 JANUARY, 2013...
  • Page 2 CONTENTS SECTION 1 ..SUMMARY SECTION 2 ..CABINET & MAIN CHASSIS SECTION 3 ..ELECTRICAL SECTION 4 ..REPLACEMENT PARTS LIST...

  • Page 3: Table Of Contents

    SECTION 1 SUMMARY CONTENTS SERVICING PRECAUTIONS ........................1-3 ESD PRECAUTIONS ..........................1-5 HIDDEN KEY MODE ........................... 1-6 SERVICE INFORMATION FOR EEPROM ................... 1-7 PROGRAM DOWNLOAD GUIDE ......................1-8 1. AUDIO PROGRAM ........................... 1-8 2. CD PROGRAM ............................1-9 3. TOUCH PROGRAM ..........................1-10 4.

  • Page 4: Servicing Precautions

    SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. Storage in conductive bag Drop impact 2.
  • Page 5 NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.

  • Page 6: Esd Precautions

    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 7: Hidden Key Mode

    HIDDEN KEY MODE Push both Front key and RCU key to activate it for 5 seconds. 1. Disc Lock On/Off (CD Function Only Active) Front Key : STOP RCU Key : STOP 2. Check Version and Option code Front Key : STOP RCU Key : PLAY/PAUSE You can change [Audio MCU Version <->...

  • Page 8: Service Information For Eeprom

    SERVICE INFORMATION FOR EEPROM POWER ON FLD no disc status Remote control ‘ ’ + Front ‘STOP’ DETECT NEW EEPROM push same timing during 5s (OPTION EDIT SCREEN) NAME OPT 0 FLD ‘OP-0…. OPT 1 OPT 2 OPT 3 OPT 4 Move to appropriate position OPT 5 and make changes...

  • Page 9: Program Download Guide

    PROGRAM DOWNLOAD GUIDE 1. AUDIO PROGRAM Download program file name must be FA162_YYMMDDX.HEX If security program (Water Wall) is activated on your PC, you must save the file to the usb storage device and disable the security software, then download the file to your set. Caution: When downloading the file, you should neither unplug the usb device, change to the other function, nor power off the device.

  • Page 10: Cd Program

    2. CD PROGRAM Download program file name must be HF300_DATE_00_ALL.BIN If security program (Water Wall) is activated on your PC, you must save the file to the usb storage device and disable the security software, then download the file to your set. Caution: When downloading the file, you should neither unplug the usb device, change to the other function, nor power off the device.

  • Page 11: Touch Program

    3. TOUCH PROGRAM Download program file name must be TC380_LG_FA162_YYMMDD_0.dld If security program (Water Wall) is activated on your PC, you must save the file to the usb storage device and disable the security software, then download the file to your set. Caution: When downloading the file, you should neither unplug the usb device, change to the other function, nor power off the device.

  • Page 12: Eq Program

    4. EQ PROGRAM Download program file name must be EQ_PRG_FA162N_YYMMDDX_814F.BIN If security program (Water Wall) is activated on your PC, you must save the file to the usb storage device and disable the security software, then download the file to your set. Caution: When downloading the file, you should neither unplug the usb device, change to the other function, nor power off the device.

  • Page 13: Specifications

    SPECIFICATIONS • GENERAL Power supply Refer to the back panel of the unit. Power consumption Refer to the back panel of the unit. Net Weight 3.31 kg External dimensions (WxHxD) 170 x 253 x 265 mm • CD Frequency response 65 - 20 000 Hz Signal-to-noise ratio 75 dB...
  • Page 14 SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS ............................. 2-1 1. CABINET AND MAIN FRAME SECTION (FA162N) ................2-3 2. DECK MECHANISM SECTION (DP-12AM) ..................... 2-5 3. PACKING ACCESSORY SECTION ......................2-7 4. SPEAKER SECTION (FAS162F)......................2-8...
  • Page 15 MEMO...

  • Page 16: Exploded Views

    EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION (FA162N) NOTES) THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. SMPS CABLE3 CABLE1 FRONT MAIN...
  • Page 17 MEMO 2. MECHANISM DECK SECTION (DP-12AM) 015B 015A 012A...

  • Page 18: Packing Accessory Section

    3. PACKING ACCESSORY SECTION 801 Owner’s Manual 808 Battery 805 Clear Sheet 825 FM Wire Antenna 900 Remote Control 803 Packing 804 Bag 802 Box...

  • Page 19: Speaker Section (Fas162F)

    4. SPEAKER SECTION (FAS162F) A60L A60R...
  • Page 20 SECTION 3 ELECTRICAL CONTENTS TONE POINT REPAIR GUIDE .......................... 3-2 1. NO POWER PROBLEM ......................... 3-2 2. SPEAKER NO AUDIO OUTPUT ......................3-3 3. USB NO DETECT ........................... 3-4 4. NO BOOTING ............................3-5 ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART ..............3-6 1.

  • Page 21: No Power Problem

    ONE POINT REPAIR GUIDE 1. NO POWER PROBLEM No power problem occurs when you power on the unit. 1-1. Solution Replace X100, IC101, IC103. 1-2. How to troubleshoot (Countermeasure) 1) Check X100(Crystal). If it does not oscillate, change X100. 2) Check IC103(Reset IC). IF its output voltage is not more than +2.7 V, change IC103.

  • Page 22: Speaker No Audio Output

    ONE POINT REPAIR GUIDE 2. SPEAKER NO AUDIO OUTPUT No audio output problem occurs when you power on the unit. 2-1. Solution Reassemble AMP IC heat-sink, replace IC101. 2-2. How to troubleshoot (Countermeasure) 1) Reassemble AMP IC heat-sink (heat-sink screw must be assembled tightly). 2) Still NG, please check CN901 Pin10 (12 V), Pin1, 2, 3, 4 (28 V).

  • Page 23: Usb No Detect

    ONE POINT REPAIR GUIDE 3. USB NO DETECT When USB insert, USB no detect on the unit. 3-1. Solution Replace IC305. 3-2. How to troubleshoot (Countermeasure) 1) Please check IC305. Pin3 : 5 V 2) If it is not OK, replace IC305. 3-3.

  • Page 24: No Booting

    ONE POINT REPAIR GUIDE 4. NO BOOTING After you turn on the unit and displayed message in the following order (HELLO VOL XX or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally. 4-1.

  • Page 25: Electrical Troubleshooting Guide Of Audio Part

    ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART 1. μ-COM PART CHECK-1 μ-com part check-1 Check Refer to CN103 Pin11 SMPS troubleshooting. 3.7 VA. Check Check both Check the related parts if input voltage of IC100 is end voltage of IC100 of IC100(AZ7027). over 3.5 V.

  • Page 26: Fld Display Check

    ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART 2. FLD DISPLAY CHECK FLD display check Check Refer to CN103 Pin1, 2, 3 SMPS troubleshooting. power. F1+, F2- both terminals: over 3.7 V Check power VKK: over -30 V. Check CN102 connection condition and power F1+, F2- Check CN102 assembly.

  • Page 27: Touch Pad Check

    ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART 3. TOUCH PAD CHECK Touch pad check Check IC104 output Pin3 : 3.3 V Check IC104 input Pin2 : 3.7 VA Check IC304 PN302 Pin5 3.3 V. IF it is right --> OK Pin24 3.3 V. IF it is NO -->...

  • Page 28: Pwm Modulation Part

    ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART 4. PWM MODULATION PART PWM modulation part check Check IC104 Pin3: 3.3V Refer to If it is YES, then OK. If it is NO, then check IC104 Pin2: 3.7VA --> IF it is NO, refer to SMPS troubleshooting.

  • Page 29: Power Amp Part Check

    ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART 5. POWER AMP PART CHECK Power AMP part check CN103 Refer to SMPS troubleshooting. Pin14, 15: 27 V Check input power of IC700 Pin29, 30, 31, 36, 37, 38. Check Check resistance power IC700 Pin1, 2, 22 :+12V IC700: R700, L700, L703.

  • Page 30: Aux Function Check

    ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART 6. AUX FUNCTION CHECK AUX function check Check whether JK201 contacts or not. Check IC201 Check Check μ-com (IC100) L201, L202, C221, C226, CS5346 Pin23, 24 input Pin3, 69 communication. R242, R243. waveform. Replace the related part. Check IC201 Check IC201 Pin14: 5 V,...

  • Page 31: Tuner Function Check

    ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART 7. TUNER FUNCTION CHECK Tuner function check Check Check tuner module power tuner module (TU100) Check IC104 Pin3. (Pin6 3.3 V). operation. Check SMPS. Check Check IC201 Check μ-com (IC100) L201, L202, C221, C226, CS5346 Pin21, 22 input Pin3, 69 communication.

  • Page 32: Smps Power Circuit

    ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART 8. SMPS POWER CIRCUIT No 3.7 VA F901 normal? Replace F901 (same fuse). TH901 normal? Replace TH901. BD901 normal? Replace BD901. Is the Vcc (13 V ~ 27 V) supplied to IC901 normal? IC901 Pin5? Check or replace IC901.
  • Page 33 ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART No 5.6 VA Is the Vcc supplied to IC901 Check D902. Pin5? Is there 3.3 V at IC901 Check 3.3 V output. Pin4? D951 normal? Replace D951. Check soldering connector PN901. No 12 V Is the Vcc supplied to IC901 Check D902.
  • Page 34 ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART No FL+/ FL- Is the P_CTRL OK? Check 3.7 V output & P_CTRL. D950 normal? Replace D950. R950 normal? Replace R950. Check soldering connector PN901. No AMP output Is the Vcc Is the P_CTRL OK? supplied to IC902 Check 3.7 V.

  • Page 35: Electrical Troubleshooting Guide Of Cd Part

    ELECTRICAL TROUBLESHOOTING GUIDE OF CD PART 1. POWER CHECK GUIDE Power ON Power ON Push CD button. Does AUX, Does CD FM 87.5 appear appear at FLD? at FLD? Does it appear Does disc1 CD error at FLD? appear at FLD? Check connector.

  • Page 36: Cd Part

    ELECTRICAL TROUBLESHOOTING GUIDE OF CD PART 2. CD PART Turn on CD. Check Check connector CN403. Open/ Close. Refer to Check voltage IC401 Pin8, 19: 5 V. SMPS troubleshooting. Check CN403 Pin3: Open, Pin4: Close. Check connector Check “READING” display. CN401, CN403.

  • Page 37: Open Close Ng

    ELECTRICAL TROUBLESHOOTING GUIDE OF CD PART 3. OPEN CLOSE NG Check connector locking. (CN403) Check voltage Defective Main power supply. IC401 (S3053) Pin8, 19: 5 V Check voltage IC401 (S3053) Defective IC401. Pin9: LOAD-, Pin10: LOAD+ Defective mechanism. 4. “ READING ” DISPLAY CHECK (= ONLY “CD” DISPLAY) Check connector locking.

  • Page 38: Reading Ok Check (= "No Disc" Display)

    ELECTRICAL TROUBLESHOOTING GUIDE OF CD PART 5. READING OK CHECK (= “NO DISC” DISPLAY) Check connector locking. (CN401, CN403) Check CN401 Defective Does sled move? Pin3, 4 (SL+, SL-). pick-up or IC400 or IC401. Check CN401 Defective Does lense move? Pin13, 16 (FA+, FA-).
  • Page 39 ELECTRICAL TROUBLESHOOTING GUIDE OF CD PART 5-1. READING OK CHECK #A (= “NO DISC” DISPLAY) Does Does SL+ waveform SLIN waveform Defective IC401. appear at (IC400 Pin13 & IC401 Pin3) appear at (IC400 Pin5) waveform#2 sled motor waveform #2 sled dirve wave wave Defective IC400.
  • Page 40 ELECTRICAL TROUBLESHOOTING GUIDE OF CD PART 5-3. READING OK CHECK #C (= “NO DISC” DISPLAY) Is 3.3 V applied Is 3.3 V applied to Pin30,36,39,41,61,68,75 Defective IC400. to Pin10 of CN401 laser supply of IC401 RF IC supply voltage check voltage check Is 2.3 V Pin18(LDO) of IC401...
  • Page 41 ELECTRICAL TROUBLESHOOTING GUIDE OF CD PART 5-5. READING OK CHECK #E (= “NO DISC” DISPLAY) Does Does TA+ waveform TAIN waveform Defective IC401. appear at (IC400 Pin17) appear at (IC400 Pin22) waveform#5 tracking coil waveform #5 tracking dirve drive wave. wave Defective IC400.

  • Page 42: Usb Part

    ELECTRICAL TROUBLESHOOTING GUIDE OF CD PART 6. USB PART Turn on USB Check Check connector “CHECKING” or “USB” (CN302, JK304) display Check CN103 Pin9: 5.6 V. Check IC305 Pin3: 5 V. Check JK304 Check Reading OK. Pin2 (D-), Pin3 (D+). Check IC501 (BX8805).

  • Page 43: Waveforms Of Major Check Point

    WAVEFORMS OF MAJOR CHECK POINT #1. MICOM INTERFACE WAVEFORM #2. MICOM INTERFACE WAVEFORM (IC400 PIN19, 20, 30, 34) DURING (IC400 PIN19, 20, 30, 34) DURING POWER ON NORMAL PLAY PIN 30 : CD_RW PIN 20 : CD_RW PIN 34 : DI (IC400 PIN46 DATA OUT) PIN 34 : DI (IC400 PIN46 DATA OUT) PIN 19 : DO (IC400 PIN45 DATA IN) PIN 19 : DO (IC400 PIN45 DATA IN)
  • Page 44 #2. SLED DRIVE AND MOTOR WAVEFORM #2. SLED DRIVE AND MOTOR WAVEFORM (IC401 PIN 4, 11) WHEN (IC401 PIN 4, 11) DURING NORMAL PLAY FOCUS SEARCH PIN 4 : SLIN PIN 4: SLIN PIN 11 : SL+ PIN 11 : SL+ #3.
  • Page 45 #4. SPINDLE DRIVE AND MOTOR WAVEFORM #5. TRACK DRIVE AND MOTOR WAVEFORM (IC401 PIN 17, 23) WHEN TOC READING (IC401 PIN 16, 26) DURING NORMAL PLAY PIN 26 : TAO PIN 23 : SPIN PIN 16 : TA+ PIN 17 : SP+ #6.
  • Page 46 #7. AUDIO PART (I2S) 3-27...
  • Page 47 MEMO 3-28...

  • Page 48: Wiring Diagram

    WIRING DIAGRAM TOUCH : HARNESS FR1-SILVER : FFC SMPS 15PIN MAIN FR4-2LAYER FRONT FR1-1LAYER LOAD 9PIN FRONT 29PIN SMPS FR1-1LAYER CORD USB 6PIN 3-29 3-30...

  • Page 49: Block Diagrams

    BLOCK DIAGRAMS 1. SYSTEM BLOCK DIAGRAM Interface TOUCH 3-wire 3.3V 3.3V 3.3/5V 3.3V TUNER L/R 12MHz I2C,RESET AUX L/R (Front) 32.768kHz FRONT DAC_MCLK / BCK ADC_DATA / LRCK CD_ADC_BCK , 3.3/1.2V CD_ADC_LRCK, CD_ADC_DATA 74AHC244 12 MHz SWITCH Interface 3.3V D+, D- 3.3V/ 1.8V PVDD(26V)/GVDD(12V) 3.3V...

  • Page 50: Smps Block Diagram

    2. SMPS BLOCK DIAGRAM Rectifier Smoothing Circuit 3-33 3-34...

  • Page 51: Power Diagram

    3. POWER DIAGRAM 6.8A 200mA 250mA 3.3V_VA For Backup 3.3V_MICOM 10mA 55mA 3.3V / 1.5A DVCC_3.3V VCC_1.2V 373mA 590mA 10mA 100mA 30mA 40mA 50mA 23mA 41mA AVCC_3.3V 20mA 220mA 20mA 10mA VCC_1.8V DVCC_5V 165mA 70mA 50mA 100mA 150mA 10mA 85mA AVCC_5V 741mA 700mA...

  • Page 52: Circuit Diagrams

    BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE ACTUAL CIRCUIT USED. THIS WAY, 2. Voltages are DC-measured with a digital voltmeter FROM THE LG CORPORATION. ALL COMPONENTS IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. SHOULD BE REPLACED ONLY WITH TYPES PERFORMANCE IMPROVEMENT CHANGES INTO IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT.

  • Page 53: Main - Micom Circuit Diagram

    2. MAIN - MICOM CIRCUIT DIAGRAM MICOM EAX64998702_2_1.2-SD(#2) 2013. 01. 25 3-39 3-40...

  • Page 54: Main - Dsp Circuit Diagram

    3. MAIN - DSP CIRCUIT DIAGRAM EAX64998702_2_1.2-SD(#3) 2013. 01. 25 3-41 3-42...

  • Page 55: Main - Servo Circuit Diagram

    4. MAIN - SERVO CIRCUIT DIAGRAM SERVO EAX64998702_2_1.2-SD(#4) 2013. 01. 25 3-43 3-44...

  • Page 56: Main - Amp Circuit Diagram

    5. MAIN - AMP CIRCUIT DIAGRAM EAX64998702_2_1.2-SD(#5) 2013. 01. 25 3-45 3-46...

  • Page 57: Front Circuit Diagram

    6. FRONT CIRCUIT DIAGRAM FRONT EAX65084102_0_1.0-SD 2013. 01. 25 3-47 3-48...

  • Page 58: Touch Circuit Diagram

    7. TOUCH CIRCUIT DIAGRAM 8. TOUCH SLIDE CIRCUIT DIAGRAM TOUCH TOUCH SLIDE EAX64998801_3_1.3-SD EAX64998901_3_1.3-SD 2013. 01. 25 2013. 01. 25 3-49 3-50...

  • Page 59: Circuit Voltage Chart

    CIRCUIT VOLTAGE CHART 1. ICs 3. CAPACITORS Location No. Description Specifi cation Pin Number SPEC. REAL VALUE Location No. Description Specifi cation REAL VALUE MAIN Board MAIN Board IC101 MICOM LC87FC096AVU VDD #9,#36,#59 VDD: +2.7 ~ +3.6V VDD: 3.35V C128 Capacitor,AL,Chip 100uF 20% 16V 3.35...

  • Page 60: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. SMPS P.C.BOARD (TOP VIEW) (BOTTOM VIEW) NOTE) Warning Parts that are critical with respect to risk of fire or electrical shock. 3-53 3-54...

  • Page 61: Main P.c.board

    2. MAIN P.C.BOARD (TOP VIEW) 3-55 3-56...
  • Page 62 MAIN P.C.BOARD (BOTTOM VIEW) 3-57 3-58...

  • Page 63: Front P.c.board

    3. FRONT P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-59 3-60...

  • Page 64: Touch P.c.board

    4. TOUCH P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 5. TOUCH SLIDE P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-61 3-62...
  • Page 65 MEMO MEMO 3-63 3-64...

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