LG XA14 Service Manual Download Page 23 | Manualshive

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7. IC601 TROUBLESHOOTING

NO

NO

YES

IC601 troubleshooting

Refer to

MCU troubleshooting

Replace MCU

NO

YES

YES

Check

IC601 pin34: CLK,

pin35: CKE

Check

MCU IC603 voltage

1.2V

Check MCU IC603

OK

8. IC603 TROUBLESHOOTING

IC603 troubleshooting

Refer Both end voltage

0f IC501, IC605 3.3V/6.2V

Check or replace X600

YES

YES

YES

YES

NO

NO

Check

both end voltage of IC605

(1.2V / 3.3V)

Check

IC603 pin111, 112, X600

operation

Check or replace R601

Check IC602 reset circuit

NO

NO

Check IC603

pin13, 47, 94, 120, 122, 124 voltage

1.2V are in

When

power supply to IC603 pin107

(Low-->High)

OK

3-8

ELECTRICAL TROUBLESHOOTING GUIDE

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Summary of Contents for XA14

Page 1: ...ERVICE MANUAL MODEL XA14 XAS14F CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL XA14 XAS14F SERVICE MANUAL 010 2 MAY 3972674 7 N F A O N P Website http biz lgservice com Internal Use Only ...

Page 2: ...CONTENTS SECTION 1 SUMMARY SECTION 2 CABINET MAIN CHASSIS SECTION 3 ELECTRICAL SECTION 4 REPLACEMENT PARTS LIST 1 1 ...

Page 3: ...VICING GUIDELINES FOR A V PRODUCTS 1 3 SERVICING PRECAUTIONS 1 4 GENERAL SERVICING PRECAUTIONS INSULATION CHECKING PRODEDURE ELECTROSTATICALLY SENSITIVE ES DEVICES SERVICE INFORMATION FOR EEPROM 1 5 PROGRAM UPDATE GUIDE 1 6 SPECIFICATIONS 1 7 1 2 ...

Page 4: ...d line plug has not been defeated 3 Soldering must be inspected to discover possible cold solder joints solder splashes or sharp solder points Be certain to remove all loose foreign particles 4 Check for physical evidence of damage or deterioration to parts and components for frayed leads or damaged insulation including the AC cord and replace if necessary 5 No lead or component should touch a hig...

Page 5: ...clude Metal panels Input terminals Earphone jacks etc Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly are called Electrostatically Sensitive ES Devices Examples of typical ES devices are integrated circuits and some field effect transistors and semiconductor chip components The following techniques s...

Page 6: ...ess POWER key once FLD write ok Move to appropriate position and make changes with remote control REPEAT PLAY BWD SKIP FWD SKIP FLD no disc status Front STOP Remote control FWD SKIP push same timing during 5s DETECT NEW EEPROM OPTION EDIT SCREEN NAME HEX OP0 xx OP1 xx OP2 xx 1 5 ...

Page 7: ...d 2 HOW TO UPDATE SANYO PROGRAM 1 Change the file name to download as MODEL NAME _ Version HEX in upper cases ex XA14 XA14_0809262 HEX 2 Copy the file to the root folder of USB storage 3 Put the USB into the set Then the upgrade process will be started with the upgrade information 4 If the upgrade process is complete the set will be rebooted with Complete message 3 HOW TO UPDATE MCS PROGRAM 1 Chan...

Page 8: ...n u T M F AMPLIFIER W 5 W 5 r e w o P t u p t u O 5 0 D H T Frequency Response 60 Hz 20 KHz Signal to noise ratio 70 dB CD Frequency response 40 Hz 20 KHz Signal to noise ratio 70 dB B d 5 5 e g n a r c i m a n y D SPEAKERS XAS14F r e k a e p S 1 y a W 1 e p y T 6 e c n a d e p m i Ω W 5 r e w o P t u p n I d e t a R W 0 1 r e w o P t u p n I x a M Net Dimensions W x H x D 132 x 205 x 155 mm g k 9...

Page 9: ...1 8 MEMO ...

Page 10: ...SECTION 2 CABINET MAIN CHASSIS CONTENTS EXPLODED VIEWS 2 3 1 CABINET AND MAIN FRAME SECTION 2 3 2 PACKING ACCESSORY SECTION 2 7 3 SPEAKER SECTION XAS14F 2 8 2 1 ...

Page 11: ...2 2 MEMO ...

Page 12: ...T AND MAIN FRAME SECTION 263 H G A F J D B C A C E B D I G F H E I 258 A26 A43 252 253 255 451 451 452 254 256 262 263 A47 264 261 A46 A45 268 267 266 265 263 A42 250 251 251 257 257 CABLE2 CABLE1 CABLE3 AUX MCU FRONT MAIN SMPS 300 J ...

Page 13: ...2 5 2 6 MEMO MEMO ...

Page 14: ...2 7 2 PACKING ACCESSORY SECTION Battery 808 Remote controller 900 Instruction Ass y 801 Packing 803 Box 802 Bag 804 ...

Page 15: ...2 8 3 SPEAKER SECTION XAS14F A60L A60R ...

Page 16: ...DRIVE MOTOR WAVEFORM 3 13 3 CD PLAYING WAVEFORM 3 14 4 CD STOP ACTION WAVEFORM 3 15 5 CD READING WAVEFORM 3 15 6 CD PLAYING RF WAVEFORM 3 16 7 USB OPERATING WAVEFORM 3 17 8 RADIO OPERATING WAVEFORM 3 17 WIRING DIAGRAM 3 19 BLOCK DIAGRAMS 3 21 1 MAIN BLOCK DIAGRAM 3 21 2 CD BLOCK DIAGRAM 3 23 CIRCUIT DIAGRAMS 3 25 1 SMPS CIRCUIT DIAGRAM 3 25 2 MAIN CIRCUIT DIAGRAM 3 27 3 MCU CIRCUIT DIAGRAM 3 29 4 ...

Page 17: ...S YES YES YES YES YES NO NO NO Is the F901 nomal Is the D906 nomal Is the R901 nomal Replace the D901 D902 D903 D904 Replace the D909 Is the D906 nomal NO NO NO NO Is the D901 D902 D903 D904 nomal Is the D909 nomal Is Vcc 9V 25V supplied to IC901 pin5 Power line of main PCB is short 3 2 ELECTRICAL TROUBLESHOOTING GUIDE ...

Page 18: ...E YES YES NO YES No mute Replace the TR Q206 Q1 Check U600 pin17 Check R635 Check IC603 pin69 Replace the R622 NO NO NO NO Check the Low of Q206 Q1 C Does High appear at Q206 Q1 B Mute 3 3 ELECTRICAL TROUBLESHOOTING GUIDE ...

Page 19: ...unction Input YES YES YES YES YES NO NO Check the output U200 pin1 2 14 15 Check the DC 9 5V of U503 pin24 Check the High of IC 200 pin7 Normal NO NO Check the input signal of IC300 pin25 26 Check the DC 12V of R3 Check the power circuit 3 4 ELECTRICAL TROUBLESHOOTING GUIDE ...

Page 20: ... U502 pin55 57 and refer to CD trobleshooting Check the output signal of U503 pin19 23 Check the output signal of U503 pin19 23 Check the output signalt of U503 pin19 23 YES YES YES NO NO NO Check the input signal of U503 Pin7 8 Check the input signal of U503 pin1 2 Check the input signal of U503 pin3 4 3 5 ELECTRICAL TROUBLESHOOTING GUIDE ...

Page 21: ... display Refer to power supply IC501 3 3V Replace uCOM YES YES YES NO Check the power supply to IC301 pin7 Check uCOM IC603 pin56 CS pin57 DAT pin91 WR NO NO Check IC301 pin1 CS pin3 WR pin4 Data OK 3 6 ELECTRICAL TROUBLESHOOTING GUIDE ...

Page 22: ... replace Q600 Check or replace L600 YES YES YES YES NO NO Check both end voltage Q600 3 3V Check IC604 pin13 is 3 3V Check IC606 pin1 is H check and replace Q601 Check or replace X601 NO NO Check Q601 is H Check IC600 pin1 6 and X601 operation OK 3 7 ELECTRICAL TROUBLESHOOTING GUIDE ...

Page 23: ...OUBLESHOOTING IC603 troubleshooting Refer Both end voltage 0f IC501 IC605 3 3V 6 2V Check or replace X600 YES YES YES YES NO NO Check both end voltage of IC605 1 2V 3 3V Check IC603 pin111 112 X600 operation Check or replace R601 Check IC602 reset circuit NO NO Check IC603 pin13 47 94 120 122 124 voltage 1 2V are in When power supply to IC603 pin107 Low High OK 3 8 ELECTRICAL TROUBLESHOOTING GUIDE...

Page 24: ...Check or replace U503 Check the operation YES YES YES YES YES YES NO NO NO Check the power supply to U503 pin24 Check the power supply of TU101 pin3 Check the control function Check the JK601 pin47 48 Vol_CLK Vol_Data JK600 pin20 21 NO NO Check the SCL SDA data of U503 pin25 26 Check TU SCL TU SDA OK OK 3 9 ELECTRICAL TROUBLESHOOTING GUIDE ...

Page 25: ...ement Check U504 BA5826 Check U502 YES YES YES YES YES NO Check Open Close Check Connector CN7 open 3 3V close 0V Check U502 pin55 57 Check Connector CN503 NO NO NO NO NO NO Check READING display If play Check audio output Check Reading OK OK 3 10 ELECTRICAL TROUBLESHOOTING GUIDE ...

Page 26: ...ick up or U502 U504 Defective pick up or U502 U504 YES YES YES YES YES Check CN500 pin3 4 SL SL Check CN503 pin13 16 F F Check CN503 pin10 LD Check CN500 pin1 2 SP SP Check CN503 pin14 15 T T Is reading OK NO NO NO NO NO NO NO NO NO NO Does sled motor move Does the laser move Does laser light Does the spindle motor rotate 3 11 ELECTRICAL TROUBLESHOOTING GUIDE ...

Page 27: ...heck U502 pin55 57 Check power supply circuit USB 5V Check CN401 pin3 4 D D Check U503 pin3 4 Check uCOM IC603 pin116 117 D D Check uCOM IC603 pin116 117 D D NO NO NO NO NO NO Check CHECKING or USB display Check Reading OK If play Check audio output OK 3 12 ELECTRICAL TROUBLESHOOTING GUIDE ...

Page 28: ...1 CD SEARCHING WAVEFORM 1 U502 PIN61 EE 7 U504 PIN2 SP 4 U504 PIN27 SL 5 U504 PIN26 SL 6 U504 PIN1 SP 2 U502 PIN62 TE 3 U502 PIN60 FE 2 SPINDLE DRIVE MOTOR WAVEFORM 3 13 WAVEFORMS ...

Page 29: ...3 CD PLAYING WAVEFORM 8 9 10 11 U502 PIN62 TE U502 PIN61 EE U502 PIN60 FE U504 PIN2 SP 12 U502 PIN14 TD 13 U502 PIN13 FD 3 14 ...

Page 30: ...4 CD STOP ACTION WAVEFORM 15 14 16 17 U504 PIN26 SL U504 PIN2 SP U504 PIN11 T U504 PIN18 F 5 CD READING WAVEFORM 18 19 20 21 U502 PIN41 MCK U502 PIN19 DIN U502 PIN20 R W U502 PIN21 BUSY 3 15 ...

Page 31: ...22 23 24 25 U502 PIN39 LRCK U502 PIN40 BCK U502 PIN41 MCK U502 PIN38 DATA 6 CD PLAYING RF WAVEFORM 26 U502 PIN63 RF 3 16 ...

Page 32: ...7 USB OPERATING WAVEFORM 27 28 29 CN401 PIN3 D CN401 PIN2 5V CN401 PIN4 D 8 RADIO OPERATING WAVEFORM 30 31 32 U101 PIN2 SDA U101 PIN8 RESET U101 PIN1 SCL 3 17 ...

Page 33: ...3 18 MEMO ...

Page 34: ...3 19 3 20 FRONT PCB SMPS PCB USB PCB MAIN PCB MCU PCB CD PICK UP 16P FFC 6P WIRE 2P WIRE 3P WIRE 4P WIRE 10P WIRE 9P WIRE 4P WIRE 3P WIRE B T B CNT WIRING DIAGRAM ...

Page 35: ...F PD LD I2C R W BUSY SUBSYQ RESET USB CON D SDRAM16M SDRAM FLASH I2S_MCK TUNER AMP TDA7266 POTABLE IN SLED F T SPINDLE LOAD TDO SLDO SPDO FDO MD SWITCH 12MHZ 16 93MHZ FM MLC 9800 MCS LOGIC RESET SMPS POWER 5V 12V I2S FUNCTION BD3490 DATA Address LINE 10 9V ANALOG L ch R_ch RR FR 3 3V ADC WM8782 LCD LCD DRIVER HT1622 ...

Page 36: ...MDI CD mp3 FOCUS SLED SPINDLE TRACKING AMP_STBY SLED F T LOAD SPINDLE M DECK MECHANISM MOTOR DRIVE IC CD5888 FDI FDO F CS FCLK USBP USBN 7314 4CH 3 3V 12V 3 3V REG 3 3V 5V USB CON PORT IN TUNER SI4702 MCU CLK DATA RST DATA CLK R L R L R L VCC VCC AMP TDA7266SA LCD DISPLAY LCD DRIVER HT1622 VFD_STB DO CLK R L KEY STANDBY IR 32 768KHZ 6Ω 5W ...

Page 37: ... IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER FROM THE ACTUAL CIRCUIT USED THIS WAY IMPLEMENTATION OF THE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED 1 Shaded parts are critical for safety Replace only with s...

Page 38: ...3 27 3 28 2 MAIN CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T 30 31 32 ...

Page 39: ...3 29 3 30 3 MCU CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T ...

Page 40: ...3 31 3 32 4 MAIN CD CIRCUIT DIAGRAM 20 19 21 12 26 13 18 22 23 25 24 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T 4 17 5 15 16 6 7 11 14 9 1 10 2 8 3 ...

Page 41: ...3 33 3 34 5 FRONT USB CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T 27 28 29 ...

Page 42: ...2 14 AGND 15 0 38 16 3 1 17 0 38 18 2 15 19 2 15 20 2 15 21 2 15 22 2 15 23 2 15 24 2 15 25 2 15 26 2 15 27 2 15 28 0 89 29 0 89 30 3 25 31P DGND 32 46 0 9 47 1 2 48 DGND 49 3 02 50 3 09 51 3 25 52 DGND 53 1 53 54 1 53 55 2 93 56 2 93 57 2 93 58 3 25 59 3 25 PIN NO TEST VOLT V 60 62 3 25 63 1 36 64 2 12 65 2 68 66 0 01 67 1 31 68 0 01 69 3 18 70 0 28 71 3 21 72 0 47 73 3 21 74 3 24 75 3 25 76 3 25...

Page 43: ...3 37 3 38 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD TOP VIEW BOTTOM VIEW 7 6 5 4 3 2 1 A B C D E F G 7 6 5 4 3 2 1 A B C D E F G ...

Page 44: ...3 39 3 40 2 SMPS P C BOARD TOP VIEW BOTTOM VIEW 6 5 4 3 2 1 A B C D E F G H 6 5 4 3 2 1 A B C D E F G H ...

Page 45: ...3 41 3 42 3 FRONT P C BOARD TOP VIEW BOTTOM VIEW 7 6 5 4 3 2 1 A B C D E F G H 8 7 6 5 4 3 2 1 A B C D E F G H 8 ...

Page 46: ...3 43 3 44 4 MCU P C BOARD TOP VIEW 5 AUX P C BOARD TOP VIEW BOTTOM VIEW BOTTOM VIEW 3 2 1 A B C 3 2 1 A B C 3 2 1 A B 3 2 1 A B ...

Page 47: ...3 45 3 46 MEMO MEMO ...

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