Table of Contents
Troubleshooting
Related Manuals for LG XA66
Summary of Contents for LG XA66
- Page 1 Internal Use Only Website http://biz.lgservice.com MICRO Hi-Fi SYSTEM SERVICE MANUAL MODEL: XA66 (XA66, XAS66F) CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN75496346 JUNE, 2011...
- Page 2 CONTENTS SECTION 1 ..SUMMARY SECTION 2 ..CABINET & MAIN CHASSIS SECTION 3 ..ELECTRICAL SECTION 4 ..REPLACEMENT PARTS LIST...
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Page 3: Table Of Contents
SECTION 1 SUMMARY CONTENTS SERVICING PRECAUTIONS ........................1-3 ESD PRECAUTIONS ..........................1-5 SERVICE INFORMATION FOR EEPROM ................... 1-6 PROGRAM UPDATE GUIDE ........................1-7 SPECIFICATIONS ............................1-8... -
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.
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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: Service Information For Eeprom
SERVICE INFORMATION FOR EEPROM POWER ON FLD no disc status Front ‘STOP’ + Remote control ‘FWD DETECT NEW EEPROM SKIP’ push same timing during 5s. (OPTION EDIT SCREEN) NAME FLD 'OPT-XXX' 0000 (FM) 0100 (FM_RDS) 1010 (FM_AM) Press front "Play" key to move to appropriate position and make changes with front ‘FWD SKIP’... -
Page 8: Program Update Guide
1. HOW TO UPDATE ESS PROGRAM (1) Rename the file name to download as “LG_(MODEL NAME)_(Vresion).ROM” in upper cases. ex) XA66 : “LG_XA66_0905180.ROM” Refer to the Standard for naming of software. (2) Copy the file to the formatted USB, and burn it. -
Page 9: Specifications
SPECIFICATIONS • GENERAL Power supply 200 - 240 V ~ 50 / 60 Hz Power consumption 50 W Net Weight 2.8 kg External dimensions (W x H x D) 170 x 253 x 242 (mm) Operating temperature 5 °C ~ 35 °C Operating humidity 5 % ~ 85 % •... - Page 10 SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS ............................. 2-3 1. CABINET AND MAIN FRAME SECTION (XA66) ..................2-3 2. PACKING ACCESSORY SECTION ......................2-7 3. SPEAKER SECTION (XAS66F) ....................... 2-8...
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Page 12: Exploded Views
EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION (XA66) CABLE3 MAIN 259R 259L CABLE1 CABLE2 CN301 DISPLAY CN302 SMPS CON8 CON604 PN703 PN602 PHONE... - Page 13 MEMO MEMO...
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Page 14: Packing Accessory Section
2. PACKING ACCESSORY SECTION Battery Remote controller Instruction Ass'y 803T Packing 803B Packing... -
Page 15: Speaker Section (Xas66F)
3. SPEAKER SECTION (XAS66F) - Page 16 SECTION 3 ELECTRICAL CONTENTS ELECTRICAL TROUBLESHOOTING GUIDE ..................3-2 1. SMPS PART ............................3-2 2. MUTE ..............................3-3 3. AUDIO ABNORMAL ..........................3-4 4. AUDIO FUNCTION MODE ........................3-5 5. IC301 TROUBLESHOOTING ......................... 3-6 6. IC600 TROUBLESHOOTING ......................... 3-7 7. IC601 TROUBLESHOOTING ......................... 3-8 8.
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Page 17: Electrical Troubleshooting Guide
ELECTRICAL TROUBLESHOOTING GUIDE 1. SMPS PART 5.0V F901 nomal? Replace F901 (Use same type fuse) Replace BD901 BD901 nomal? RT901 nomal? Replace RT901 VSTR(130V-310V) supplied to Replace R904 IC901 pin5? D906, R907 nomal? Vcc(9V-25V) supplied to IC901 pin2? Check or replace D906, R907 D914 nomal? Replace D914 Replace IC903, PC903... -
Page 18: Mute
ELECTRICAL TROUBLESHOOTING GUIDE 2. MUTE Mute Does "High" appear Check U600 pin17 at Q704, Q705 "B"? Check R622 Replace R622 Check IC603 pin69 Check "Low" Replace Q704, Q705 of Q704, Q705 "C" Mute... -
Page 19: Audio Abnormal
ELECTRICAL TROUBLESHOOTING GUIDE 3. AUDIO ABNORMAL Audio abnormal Check the output Check the speakers connection U702 pin2, 4, 8,10 Check the input signal Check the "High" of U702 pin5 of U702 pin7, 11 Check the DC 9.5V Check the function input of U503 pin24 Check the DC 12V Check ZD703, D705... -
Page 20: Audio Function Mode
ELECTRICAL TROUBLESHOOTING GUIDE 4. AUDIO FUNCTION MODE Portable Check the input signal Check the input signal of CON541 of U503 pin7, 8 Check the output signal of U503 pin19, 23 CD / USB Check the output signal of U502 pin55, 57 Check the input signal of U503 pin3, 4 and refer to CD trobleshooting... -
Page 21: Ic301 Troubleshooting
ELECTRICAL TROUBLESHOOTING GUIDE 5. IC301 TROUBLESHOOTING VFD display check Check the power supply Refer to power troubleshooting to IC301 pin9, 50, 51 Check Check CON301 pin7 STB, pin8 Data, pin9 CS IC301 pin1 CS, pin3 STB pin2, 4 Data Check IC603 pin91 STB, pin57 Data, pin56 CS Check IC301 pin7 FOSC Check or replace R302... -
Page 22: Ic600 Troubleshooting
ELECTRICAL TROUBLESHOOTING GUIDE 6. IC600 TROUBLESHOOTING IC600 troubleshooting Check Refer to power supply no 3.3V both end voltage or check and replace Q600 Q600 (3.3V) Check IC603 pin5 is "H", Check Q601 "H" check and replace Q601 Check Check or replace L600 IC604 pin13 3.3V Check IC600 pin1, 6 and X601... -
Page 23: Ic601 Troubleshooting
ELECTRICAL TROUBLESHOOTING GUIDE 7. IC601 TROUBLESHOOTING IC601 troubleshooting Check Check Refer to MCU IC603 voltage IC601 pin34: CLK, MCU troubleshooting 1.2V pin35: CKE Check MCU IC603 Replace MCU 8. IC603 TROUBLESHOOTING IC603 troubleshooting Check Refer both end voltage both end voltage of IC605 of IC501, IC605 3.3V/1.2V (1.2V/3.3V) Check IC603... -
Page 24: U503 Troubleshooting
ELECTRICAL TROUBLESHOOTING GUIDE 9. U503 TROUBLESHOOTING U503 troubleshooting Check the power supply to Refer to power troubleshooting U503 pin24 Check Check JK501 pin47, 48 Vol_CLK/Vol_Data the SCL/SDA data of U503 pin25, 26 Check the control function Check or replace U503 10. -
Page 25: Cd Part
ELECTRICAL TROUBLESHOOTING GUIDE 11. CD PART Turn on CD Check open/close Refer to CD reading troubleshooting Check connector CN702 Check "READING" display open 0V, close 1.5V Check connector CN503 Check reading OK Check pick-up movement Check U504 BA5826 Check U502 If play, check audio output Check U502 pin55, 57 3-10... -
Page 26: Cd Reading Check
ELECTRICAL TROUBLESHOOTING GUIDE 12. CD READING CHECK Check connector locking CN1, CN500, CN503 Check CN500 pin3, 4 (SL+, SL-) Does sled motor move? Defective pick-up or U502, U504 Check CN503 pin13,16 (F+, F-) Does the laser move? Defective pick-up or U502, U504 Check CN503 pin10 (LD) Does laser light? Defective pick-up or Q501... -
Page 27: Usb Part
ELECTRICAL TROUBLESHOOTING GUIDE 13. USB PART Turn on USB Check "CHECKING" Check CN401 or "USB" display Check power supply circuit USB +5V Check reading OK Check CN401 pin2 5V Check μ-COM IC603 Check CN401 pin3, 4 (D+, D-) pin116, 117 (D+, D-) If play, check audio output Check U502 pin55, 57 Check μ-COM IC603... -
Page 28: Waveforms
WAVEFORMS 1. CD SEARCHING WAVEFORM U502 PIN61 EE U502 PIN62 TE U502 PIN60 FE 2. SPINDLE DRIVE & MOTOR WAVEFORM U504 PIN27 SL- U504 PIN26 SL+ U504 PIN1 SP- U504 PIN2 SP+ 3-13... -
Page 29: Cd Playing Waveform
3. CD PLAYING WAVEFORM U502 PIN62 TE U502 PIN61 EE U502 PIN60 FE U504 PIN2 SP+ U502 PIN14 TD U502 PIN13 FD 3-14... -
Page 30: Cd Stop Action Waveform
4. CD STOP ACTION WAVEFORM U504 PIN2 SP+ U504 PIN26 SLE+ U504 PIN11 T+ U504 PIN18 F+ 5. CD READING WAVEFORM U502 PIN41 MCK U502 PIN19 DIN U502 PIN20 R/W U502 PIN21 BUSY 3-15... -
Page 31: Cd Playing Rf Waveform
U502 PIN39 LRCK U502 PIN40 BCK U502 PIN41 MCK U502 PIN38 DATA 6. CD PLAYING RF WAVEFORM U502 PIN63 RF 3-16... -
Page 32: Usb Operating Waveform
7. USB OPERATING WAVEFORM CON4 PIN2 D- CON4 PIN1 +5V CON4 PIN3 D+ 8. RADIO OPERATING WAVEFORM U701 PIN2 DA U701 PIN8 RST U701 PIN1 SCK 3-17... - Page 33 MEMO 3-18...
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Page 34: Wiring Diagram
WIRING DIAGRAM HARNESS PN703 PHONE HARNESS PN602 CON703 CON541 B TO B MAIN HARNESS HARNESS SMPS HARNESS HARNESS CN703 CN903 CON701 CON501 CON500 HARNESS HARNESS HARNESS CN301 CN604 CN302 FRONT HARNESS CON8 CON6 3-19 3-20... -
Page 35: Block Diagrams
BLOCK DIAGRAMS 1. MAIN BLOCK DIAGRAM 3-21 3-22... -
Page 36: Cd Block Diagram
2. CD BLOCK DIAGRAM 16.9344M A,B,C,D,E,F ANALOG L-ch/R-ch TDA7292 P/UP 11.2896M SLDO SPDO USB CON 3.3V SMPS +20.5V POWER -20.5V 3-23 3-24... -
Page 37: Circuit Diagrams
BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE ACTUAL CIRCUIT USED. THIS WAY, 2. Voltages are DC-measured with a digital voltmeter 1. SMPS CIRCUIT DIAGRAM FROM THE LG CORPORATION. ALL COMPONENTS IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. SHOULD... -
Page 38: Decode Circuit Diagram
2. DECODE CIRCUIT DIAGRAM L606 L606 M3V3 IC605 IC605 2.2UH 2.2UH XC6206-1.2V XC6206-1.2V R607 R607 U600 U600 R601 R601 C643 C643 C613 C613 MCU_JACK_52PIN MCU_JACK_52PIN 0.1uF 0.1uF 0.1uF 0.1uF R604 R604 C646 C646 C605 C605 C649 C649 C640 C640 C623 C623 DAC_LRCK 0.1uF... -
Page 39: Cd Servo Circuit Diagram
3. CD SERVO CIRCUIT DIAGRAM JK500/JK501 JK500/JK501 MCU_JACK_52PIN MCU_JACK_52PIN CN503 CN503 L504 L504 C507 C507 C874 C874 VREF VDD33 0.1uF 0.1uF FB512 FB512 DAC_LRCK 682pF 682pF 22UH 22UH VREF R538 22K R538 22K C599 C599 600RH 600RH VREF FAN-CONTROL DAC_BCK C554 C554 L0603... -
Page 40: Display Circuit Diagram
4. DISPLAY CIRCUIT DIAGRAM VFD301 VFD301 -24V -24V CN301 CN301 HNA-15MM42T HNA-15MM42T TO SMPS TO SMPS FB301 FB301 300RH 300RH VFDP VFDP STBY STBY FB303 FB303 300RH 300RH C301 C301 FGND -24V FB304 FB304 300RH 300RH 0.1uF 0.1uF LCD-WR LCD-WR STBY FB305 FB305... -
Page 41: Tuner Circuit Diagram
5. TUNER CIRCUIT DIAGRAM +M5V CD5V TUNER BLOCK Option Q510 Q510 1.AM/FM NO RDS= KST-MW004MV1-S65PW (TUN401) B772 B772 +12V +12V 2.FM ONLY = KST-MK000FH0-806A (TUN402) C556 C556 220uF/16V 220uF/16V -12V -12V 3.FM WITH RDS=KST-MK100FH1-806A (TUN402) R580 R580 470R 470R Q407 Q407 R573 R573... -
Page 42: Amplifier Circuit Diagram
6. AMPLIFIER CIRCUIT DIAGRAM R851 R851 R793 R793 +8V2 C853 C853 R858 R858 R854 R854 C764 C764 + C765 + C765 AUXL REC-L AUXL 220K 220K 0.1uF 0.1uF 47uF/16V 47uF/16V AUXR AUXR C854 C854 Q806 Q806 100pF 100pF R859 R859 8050 8050 C802... -
Page 43: Circuit Voltage Chart
CIRCUIT VOLTAGE CHART 1. ICs Pin No. Spec. Input: 80 V, 60 Hz Input: 288 V, 50 Hz Pin No. Spec. Input: 80 V, 60 Hz Input: 288 V, 50 Hz Pin No. Spec. Voltage IC301 PT6324-Q (DISPLAY DRIVE IC) 3(VCC) 8-30V 13.92... - Page 44 3. DIODES Input: 80V / 60HZ Input: 288V / 50HZ Pin NO. Dpec. Voltage (V) Location No. Type Spec. Location No. Positive (+) Negative (-) Positive (+) Negative (-) Input: 240V / 50Hz BD901 KBL406 VRRM≤600V 103.2V 393.8V Main Board D905 FR107 VRRM≤1000V...
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Page 45: Printed Circuit Board Diagrams
PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-41 3-42... -
Page 46: Smps P.c.board
2. SMPS P.C.BOARD 3. MCU P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-43 3-44... -
Page 47: Key P.c.board
4. KEY P.C.BOARD 5. FRONT P.C.BOARD 6. EARPHONE P.C.BOARD 3-45 3-46...