XC102 LG | Alldatasheet

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MODEL : XC102 (XCS102F) CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. MODEL : XC102 (XCS102F) SERVICE MANUAL P/NO : AFN32840891 APRIL, 2007 http://biz.lgservice.com

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. 2. Repair notes 1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials. 2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board. 3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation screws should absolutely never be touched. 4) Laser beams may damage the eyes! Absolutely never permit laser beams to enter the eyes! Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged. 5) Cleaning the lens surface If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton swab should be used, taking care not to distort this. 6) Never attempt to disassemble the pick-up. Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up. SERVICING PRECAUTIONS SECTION 1 GENERAL

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. 2) The pick-up is composed of many optical components and other high-precision components. Care must be taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong magnetism is present, or where there is excessive dust. 2. Notes for repair 1) Before replacing a component part, first disconnect the power supply lead wire from the unit 2) All equipment, measuring instruments and tools must be grounded. 3) The workbench should be covered with a conductive sheet and grounded. When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is because there is the possibility of damage by static electricity.) 4) To prevent AC leakage, the metal part of the soldering iron should be grounded. 5) Workers should be grounded by an armband (1M Ω) 6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent static electricity changes in the clothing to escape from the armband. 7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin. CLEARING MALFUNCTION You can reset your unit to initial status if malfunction occur(button malfunction, display, etc.). Using a pointed good conductor(such as driver), simply short the RESET jump wire on the inside of the volume knob for more than 3 seconds. If you reset your unit, you must reenter all its settings(stations, clock, timer) NOTE: 1. To operate the RESET jump wire, pull the volume rotary knob and release it. 2. If you wish to operate the RESET jump wire, it is necessary to unplug the power cord.

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. 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a know earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices. 4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can generate electrical charges sufficient to damage ESD devices. 5. Do not use freon-propelled chemicals These can generate electrical charges sufficient to damage ESD devices. 6. Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive materials). 7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the protective material to the chassis or circuit assembly into which the device will by installed. CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER SAFETY PRECAUTIONS. 8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ESD device). [CAUTION. GRAPHIC SYMBOLS] THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED "DANGEROUS VOLTAGE" THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE.

LOCATION OF USERS CONTROLS FRONT / BACK PANEL 1715 2 12 8 9 1. (POWER) 2. CD 3. • (PLAY/PAUSE)

  • (SKIP/SEARCH) TUNE.-/+
  • (STOP)
  • VOLUME CONTROL KNOB 4. USB 5. • XDSS plus
  • XTS pro
  • EQ Master
  • ST./MONO
  • PROG.
  • CD 6. DISC TRAY 7. (Headphone jack) : ø3.5mm 8. • DEMO
  • TIMER
  • CLOCK
  • SET (RDS - OPTIONAL) 9. (USB connector) 10.PORT.IN jack 11.AUX (PORTABLE) 12.TUNER 13.DISPLAY WINDOW 14.POWER IN (POWER CORD) 15.AM/FM ANTENNA TERMINAL 16.AUX IN (AUXILIARY INPUT) connector 17.SPEAKER TERMINAL

PRESET/FOLDER( ) SLEEP (PLAY/PAUSE) • (STOP) • (SKIP/SEARCH) TUN.-/+ • REPEAT • EQ master • XDSS plus • XTS Pro • RANDOM • NUMERIC DIMMER MUTE

  • USB
  • FUNCTION VOLUME ( ) CLOCK PROGRAM/MEMO D.SKIP RDS (Radio Data System) FUNCTION
  • RDS : OPTIONAL
  • PTY : OPTIONAL
  • PTY SEARCH : OPTIONAL MP3 Info (MP3/WMA file information display)
  • GENERAL Power supply Refer to the back panel of the unit. Power consumption Refer to the back panel of the unit. Net Weight 3.0kg External dimensions (WxHxD) 174 x 245 x 278mm
  • TUNER FM Tuning Range 87.5 ~ 108.0MHz or 65 ~ 74MHz, 87.5 ~ 108.0MHz Intermediate Frequency 10.7MHz Signal to Noise Ratio 60/55dB Frequency Response 50 ~ 10000Hz AM Tuning Range 522 ~ 1620kHz or 520 ~ 1720kHz Intermediate Frequency 450kHz Signal to Noise Ratio 30dB Frequency Response 140 ~ 1800Hz
  • AMPLIFIER Output Power 50W + 50W T.H.D 0.5% Frequency Response 40 ~ 20000Hz Signal-to-noise ratio 75dB
  • CD Frequency response 40 ~ 20000Hz Signal-to-noise ratio 75dB Dynamic range 75dB
  • SPEAKERS Type 2 Way 2 Speaker Impedance 4 Ω Frequency Response 80 ~ 20000 Hz Sound Pressure Level 82dB/W (1m) Rated Input Power 50W Max. Input Power 100W Net Dimensions (WxHxD) 160 x 243 x 174mm Net Weight (1EA) 2.02kg

A C D H I D F H I A B K E J F L G B C E G JK L 256 250 254 252 454 A26 A52 454 A46 305 454 454 454 A47 263 266 264 290 454 454 454 259 CABLE3 CABLE2 A43 255 257 267 256 258 SMPS CD MAIN FRONT SECTION 2 EXPLODED VIEWS CABINET EXPLODED VIEW

018 A02

CD MECHANISM (CDM-330) EXPLODED VIEW

MODEL : XCS102F

808 Battery

900 Remote Control

801 Instruction Ass'y

803 Packing

804 Bag

802 Box

825 Antenna (FM)

824 Antenna Loop (AM)

AUDIO ELECTRICAL TROUBLESHOOTING GUIDE SECTION 3 AUDIO PART ELECTRICAL 1. POWER (SMPS) POWER (SMPS) OK YES YES YES Replace IC 901,902Check IC901, 902 Check the fuse F901 NONO NO YES Check short of P9701, P9702 line Replace the fuse Check the DC V of C905. If DC V is over 400V NO Check BD901, LF901, 902 Check the DC V of C981, C945. If DC V is 6.1V NO Check short of P9702 line YES YES Chcek the DC V of C950, C951 If DC V is in 31.5V NO Check short of P9701 line Chcek the DC V of C909, C903, C921 If DC V is in 14~19V and it is steady. YES

  1. P-SENS P-SENS YES YES Check the PIN6 of P9702 If DC V is over 5.6V Check power circuit Trouble shootingNO OK 3. VKK CHECK VKK check YES YES Check the PIN3 of P9702 If DC V is over -28V ±2 Check power circuit Trouble shootingNO OK 4. MICOM PART CHECK I MICOM part check I OK OK YES YES Check P-SENS (P7904)_PIN6. NO Refer to SMPS troubleshooting. YES YES YES Check both end voltage of IC101 (KIA7042). Check if input voltage of IC101(KIA7042) is over 5V. YES NO Check the periphery of IC101 (KIA7042). NO YES Check if IC101(KIA7042) of output voltage is over 4.3V. Check voltage of IC100 78KO/KF2_PIN1. NO Replace IC101 (KIA7042).
  1. MICOM PART CHECK II MICOM part check II X101 : 32.768kHz X100 : 9.8304MHz Check the operation. Check Q101_ emitter/collector 5V. Check Q102_base 0.6V HIGH. Check if IC103_PIN8 and IC100_PIN19, 20, 59 are 5V. NO NO YES YES Check if voltage of P7904_PIN5 is 5.6V. NO Refer to SMPS troubleshooting. YES YES YES OK YES Check both end voltage of D101 YES YES Check D101. NO Check if output of D101(RL104) is 5V. YESYES YES YES Check IC101.Q102_collector 0.6V LOW. OK Check if output of IC101 (KIA7042) is over 4.3V. OK NO Replace IC101. NO Replace D101. YES Check Q102. OK NO Replace Q102.

IC100(78KOKF2)_ PIN 22, 24 OK YES YES Refer to micom troubleshooting Check micom voltage 5V. PIN22 DATA PIN24 CLK NONO YES Replace micom.Check micom. NO YES OK 6. IC103(KS4CD21CS) CHECK

Replace WF31.Check each PIN voltage. NO NO YES YES OK Replace IC301.Check IC301. NO YES Replace IC100FLD light on? Check IC100. NO YES YES OK Refer to SMPS 7. FLD DISPLAY CHECK YES YES Check P7904_PIN1, 2, 3 voltage input. NO Check WF31 connection. NO If voltage is not 5V, check input and output of D301(1SR35). YES Check WF31 connection and power. Pin1 : FL-22 Pin2 : FL+26 Pin3 : VKK- over 26V. YES YES YES YES OKOK

76 PIN - > DO - - >

Check DATA in Check IC100. NO IC100

75 PIN - > STB

77 PIN - > 4PIN DI

78 PIN - > 1PIN CLK

Check data output. IC100 - > Check IC301 DATA communication. PIN PIN 75PIN - > 3PIN STB 76PIN - > 2PIN D 78PIN - > 1PIN CLK Check IC301(PT6324) voltage. Pin50 VKK : -26V PIN9.52 : +5V Check if both end votage of F1, F2 are over 3.7V. VKK : over 26V.

  1. PWM MODULATION PART CHECK PWM modulation part check YES YES YES YES P7905_PIN9 3.3V checking Check IC604(PS9829) VDD PIN voltage(3, 7, 8, 72, 94). Check X601_PIN2 3.3V. NO Refer to SMPS troubleshooting. YES YES YES YES Check IC605_ PIN3 input and PIN2 output. Check X601 12.288MHz operation. Check IC605_ PIN8 3.3V. Check IC605_ PIN3 input Check X601 2.288MHz NO NO IC604 (PS9829) PIN86 CLK input check NO Check FB614 BEAD input, output and voltage. NO Check X601 12.288MHz. Replace X601. OK NO OK YES YES NO Replace FB614 NO Check IC605_ PIN2 output YES OK YES OK Replace IC605.NO Check R680 (470Ω) output. Replace R680.NO Check IC604(PS9829) DATA input. Check each LINE registor output. NO Check IC604 (PS9829) DATA input.

78 PIN->DATA

79 PIN->CLK

modulator output. FL:75(+)74(-) FR:71(+)70(-) NO NO Check DVD ASS\`Y(PS9829) communication (P7403). Refer to CD troubleshooting. NO Check IC100(78KOKF2) 21->PWM_CLK 22->PWM_DATA 43->PWM_REST output. NO YES YES OK YES OK Check IC604(PS9829).OK Check LINE registor output. DATA:R671, CLK:R670 RST:R665 Replace R670, R671 and R665 NO NO Replace X601. OK YES YES YES YES

Check each LINE registor output voltage. IC700 : R701, 702, 726, 727 NOCheck IC700 PIN1,17, 18, 19, 36 +12V input. Refer to SMPS troubleshooting. YES YES YES NOP7905_3PIN : +12V, PIN13, 14, 15 : 35V. YES Replace the coils YES NO Check output line coil. Check PWM modulator input. Each IC PIN4, 6, 14, 16 YES Power IC700 PIN20, 27, 29, 34 output. Check IC700 PIN21, 26, 29, 34 input voltage. OK 9. POWER AMP PART CHECK

  1. AUX FUNCTION CHECK AUX function check Check µ-COM(IC301)_ PIN83, 84 commucation. NO NO YES Replace IC200 YES YES YES Check IC200(BU4052)_ PIN4, 11 input waveform. Check IC200(BU4052)_PIN16 VDD, PIN8 VSS power. Refer to SMPS troubleshooting. NO NO YES Replace IC801OK YES YES Check IC801(MC4580)_PIN 2, 6 input waveform. Check IC801(MC4580)_PIN4 VSS, PIN8 VDD power. Check IC200(BU4052)_ PIN3, 13 output waveform. Check JK800 connection.
  1. TUNER FUNCTION CHECK TUNER function check YES Check IC200(BU4052)_ PIN16 VDD, PIN8 VSS power. NO Check IC200(BU4052)_PIN3, 13 output waveform and IC601 (BU4052)_PIN2,15 input waveform. Check TUNER module voltage(PIN2 : 9V). YES YES YES YES NOCheck TUNER module(TU601) operation. YES Check IC801(MC4580)_ PIN4 VSS, PIN8 VDD power. YES NOCheck IC801(MC4580)_ PIN2, 6 input waveform. Replace IC200.Replace IC200. Replace IC801. Check IC200(BU4052)_PIN1, 12 input waveform. OK
  1. PORTABLE IN FUNCTION CHECK PORTABLE IN function check Check µ-COM(IC301)_ PIN83, 84 commucation. NO NO YES Replace IC200 YES YES YES Check IC200(BU4052)_ PIN5, 14 input waveform. Check IC200(BU4052)_PIN16 VDD, PIN8 VSS power. Refer to SMPS troubleshooting. NO NO YES Replace IC801OK YES YES Check IC801(MC4580)_PIN 2, 6 input waveform. Check IC801(MC4580)_PIN4 VSS, PIN8 VDD power. Check IC200(BU4052)_ PIN3, 13 output waveform. Check JK32 connection.

INTERNAL BLOCK DIAGRAM OF ICs 1. AK5358 VA AGND VD DGND MCLK Clock Divider Serial I/O Interface Decimation Filter Decimation FilterModulator Voltage Reference LRCK SCLK SDTO DIFPDNCKS0CKS1CKS2 VCOM AINR AINL Modulator 2. BU4052

  1. LC78692NW EFMIN RFOUT LPF PHLPF AIN CIN BIN DIN SLCISET RFMON VREFO JITTC EIN FIN PCNCNT TEOUT TEIN LDD LDS AV S S AV D D FDO TDO SLDO SPDO VVSS1 PDOUT1 PDOUT0 PCKIST VVDD1 DMUTEB PUIN DEFECT FSEQ C2F DVDD DVSS DVDD15 VVDD3 VVSS3 SLCO LRVSS RCHO LRREF LCHO LRVDD XVDD XIN XOUT XVSS AMUTEB DOUT DVDD DVSS DVDD15 VVSS2 VPDOUT2 VCOC2 VPREF VVDD2 LRSY DATACK DATA TEST1 STDATA STCK STREQ TEST0 CONT0 CONT1 CONT2 INTB1 INTB0 RESB DO DI CL CE DVSS DVDD 41CD PLL A/D D/A APC JITIER TES, HFL, DEFECT VREF MONITOR RF SIGNAL PROCESSOR SLICE LEVEL CONTROL SERVO CONTROL SUBCODE DECODER ROM DECODER MP3 WMA DECODER TEXT PORT CONTROL PLL3 MCU I/F System Control Memory 1M Bit Stream Control Audio Output Control PLL2DOUT Control LPF ATTENUATION CONTROL Bass-Boost INTERPOLATION MUTE ERROR CORRECTION Synchronization Detection EFM Demodulation

1 Bit

  1. PS9829B MBCK SBCK SLRCK MLRCK MSDIN[0:3] SSDIN[0:3] MIC_MCLK DMIX_MCLK OLRCK OBCK DMIX_SDOUT PWM1_P/M PWM2_P/M PWM3_P/M PWM4_P/M PWM5_P/M PWM6_P/M PWM7_P/M PWM8_P/M PWM_HP_L_P/M PWM_HP_R_P/M PWM_SWL_P/M EPD_ENA OVERLOAD MIC_BCK MIC_LRCK MIC_SDIN SPI/I2C SO/SDA SCK/SCL SI/I2C_AD0 /CS/I2C_AD2 EXT_MUTE CLK_IN /RESET PLL_DVDD PLL_DVSS PLL_AVDD PLL_AVSS DVDD DVSS IO_VSS IO_VDD Internal Controls Internal Clock Internal Reset Host Interface (I2C, SPI) Mic, Input Processor Input Mapper Sample Rate Converter Input Output MUX Serial Audio Output Interface Down Mixer Mixer 4 Band EQ Bass Manager Main Volume Trim Volume Serial Audio Output Interface PWM Modulator POP NRPower Supply Output Mapper PLL Reset & Power Down Automatic Gain Limiter 5. PT6324 SG1/KS1 SG2/KS2 SG3/KS3 SG4/KS4 SG5/KS5 SG6/KS6 SG7/KS7 SG7/KS7 SG8/KS8 SG9/KS9 SG10/KS10 SG11/KS11 SG12/KS12 SG13/KS13 SG14/KS14 SG15KS15 SG16/KS16 SG17 SG18 SG19 SG20 SG21 SG22 SG23 SG24 GR1 GR2 GR3 GR4 GR5 GR6 GR7 GR8 GR9 GR10 GR11 GR12 GR13 GR14 GR15 GR16 Segment Driver Dimming Circuit Grid Driver Control DIN/DOUT CLK STB OSC LED1 K1 K2 VDD GND VEE Timing Generator Key Matrix Memory LED Driver CSC Serial Data Interface Display Memory
  1. STR-W6753 Vcc Start Stop Burst OSC Protection latch DRIVE Reg Delay Burst Control BSD OCP GND S D FB FB OCP/BD SS/OLP BD Q Q S S R R MaxON RQ S OLP Reg& Iconst Soft Start Counter Bottom Selector OVP
  1. TAS5142 2nd-Order L-C Output Filter for Each Half-Bridge Bootstrap Capacitors 2-Channel H-Bridge BTL Mode System Microcontroller OUT_A OUT_B OUT_C OUT_D BST_A BST_B BST_C BST_D RESET_AB RESET_CD System Power Supply Hardwire Mode Control PVDD GVDD (12 V)/VDD (12 V) GND Hardwire OC Limit PVDD Power Supply Decoupling 32 V 12 V GND VAC PWM_A PWM_C PWM_D PWM_B VALID Left- Channel Output Right- Channel Output Input HúBridge 1 Input H-Bridge 2 GVDD VDD VREG Power Supply Decoupling PVDD_A, B, C, D GND_A, B, C, D GVDD_A, B, C, D 4 4 VDD GND VREG AGND OC_ADJ Bootstrap Capacitors 2nd-Order L-C Output Filter for Each Half-Bridge SD OTW Output H-Bridge 2 Output H-Bridge 1 OTW SD TAS5508
  1. U1739EJ2V1UD00/KF2_E Port 0 P00 to P067 Port 1 P10 to P178 Port 2 P20 to P277 Port 3 P30 to P334 Port 4 P40 to P478 Port 5 P50 to P578 Port 6 P60 to P678 Port 7 P70 to P778 Port 12 P120 to P1245 Port 13 P130 Port 14 P140 to P1456 Key return Reset control On-chip debugNote 2 Multiplier & divider System control Voltage regulator REGC XT2/EXCLKS/P124 XT1/P123 XT1/P121 RESET OCD0ANote 2/X1, OCD1ANote 2/P31 KR0/P70 to KR7/P77 OCD0BNote 2/X2, OCD1BNote 2/P32 X2/EXCLK/P122 Internal high-speed oscillator Buzzer output BUZ/P141 Clock output control Power on clear/ low voltage indicator POC/LVI control PCL/P140 EXLVI/P120 VDD, EVDD VSS, EVSS FLMD0 16-bit timer/ event counter 00 TO00/TI010/P01 TO01/TI011/P06 TI000/P00 TI001/P05 TOH0/P15 TOH1/P16 TI50/TO50/P17 TI51/TO51/P33 RxD0/P11 TxD0/P10 RxD6/P14 TxD6/P13 SI10/P11 SO10/P12 SI11/P03 SO11/P02 SCK11/P04 SCK11/P05 SIA0/P143 SOA0/P144 SCKA0/P142 STB0/P145 BUSY0/P141 EXSCL0/P62 SDA0/P61 SCL0/P60 AV REF RxD6/P14 (LINSEL) INTP0/P120 INTP1/P30 to INTP4/P33 INTP5/P16 INTP6/P140, INTP7/P141 AVSS ANI0/P20 to ANI7/P27 SCK10/P10 RxD6/P14 (LINSEL) 16-bit timer/ event counter 01 8-bit timer H0 8-bit timer H1 Watchdog timer 78K/0 CPU core Internal high-speed RAM Internal expansion RAM Flash memory BANKNote 1 Watch timer 8-bit timer event counter 50 8-bit timer event counter 51 Serial interface UART0 LINSEL Serial interface UART6 Serial interface CSI10 Serial interface CSI11 Serial interface CSIA0 Serial interface IIC0 A/D converter Interrupt control Internal low-speed oscillator
  1. UTC MC4580 9-1. PIN CONFIGURATION 9-2. TEST CIRCUIT

2 CH SPK TERMINAL AUX

[Total CNT Q'ty : 10ea] 1. SMPS MAIN : 2ea 2. MAIN CD : 2ea 3. MAIN FRONT : 1ea 4. FRONT CD : 1ea 5. CD MD : 3ea REDRED 3-19 WIRING DIAGRAM

ZNR & FILTER T R A N S AMP Switch IC # 1 MAIN Switch IC # 2 T R A N S FL1-FL2 (4.5V) -12V 12V (78R12) 5V(P-SENS) 6.1V (KIA278R05) P9702 P9701 FEED BACK AMP (+) 31.5V 3.5V (278R35) -31. 5V(VK K) RECTIFICATION SMOOTHING CIRCUIT FEED BACK 3-20 3-21 BLOCK DIAGRAMS 1. SMPS BLOCK DIAGRAM

FLFLFLFL+/-,-, FR+ FR+/-/- AMAMP P BOARDMAMAIN N BOARDOARD NECNEC AUAUDIODIO MIMICOMCOM NECNEC AUAUDIODIO MIMICOMCOM 12.12.288 288 MHz 9.9.8304 8304 MHz 98299829_RESETESET 9829_CLK9829_CLK 98299829_DA_DAT TATAS5142S5142_PDNDN TATAS5142S5142_SD HA1227HA1227 TAPTAPE I IC REC MUTE P/B MUTE REC BIAS DECK MD DECK/HD TUNER TUNER MODULEMODULE PLL PLL DAT.CLKDAT.CLK RDS RDS DATA.CLKDATA.CLK BU4052BU4052 TAPTAPE L/RE L/R TUNTUNER L/L/R AUX AUX L/R OP OP AMPMP AK535AK5358 OP OP AMPMP LEVELLEVEL METETER REREC L/RL/R AK5358 RAK5358 RESTST CD CD DATA.CLATA.CLK POPORT INPUTRT INPUT AUX AUX INPINPUT HEHEAD PHONEHONES BU40BU405252 DATA USBUSB DA+.-.DA+.-. 5V CD DATA.CLK AK5358 AK5358 CLKCLK.DADATATA H/P_SWH/P_SW PWPWM M OUTOUT CD CD SANYOSANYO LC786LC78692N92NW FLD (DISPLAY)VFD VFD DRDRIVEIVE IC PT632PT6324 XC102 : 2 CH (50W X 2Ch) W/O DECK XC62 : 2 CH (30W X 2Ch ) W /SINGLE DECK LEVEL SHIFT ICVEL SHIFT IC 7474VHCT24444 R L PORT PORT L/R/R SOL "B" MOTOR MODE B HALF B P/BP/B L/R L/R REREC L/RL/R XCXC6262 ON ONLY 3-22 3-23 2. MAIN & FRONT BLOCK DIAGRAM

  1. SMPS SCHEMATIC DIAGRAM WHEN SERVICING THIS CHASSIS, UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE LG CORPORATION. ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES 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 specified part number. 2. Voltages are DC-measured with a digital voltmeter during Play mode. IMPORTANT SAFETY NOTE :
  1. MAIN SCHEMATIC DIAGRAM
  1. AMP SCHEMATIC DIAGRAM
  1. FRONT SCHEMATIC DIAGRAM
  1. MAIN P.C.BOARD (TOP VIEW) PRINTED CIRCUIT BOARD DIAGRAMS

MAIN P.C.BOARD (BOTTOM VIEW)

  1. SMPS P.C.BOARD
  1. FRONT P.C.BOARD (TOP VIEW) (BOTTOM VIEW)

CD ELECTRICAL TROUBLESHOOTING GUIDE 1. CD PART TROUBLESHOOTING Turn on CD YES YES NO OPEN CLOSE check Connector check (PN804)NO Check voltage CN806 PIN1 : 12, PIN2 : 6.3V NO Check voltage PN805 PIN22 : CLOSE, PIN23 : OPEN YES NO “Reading” Display check Connector check (PN802, PN803, PN804, CN806) NO Check micom interface circuit (PN805) (CE, BTL-MUTE, CD-IN, CD-OUT, CLK, WRQ, FSEQ) YES NO Reading OK check Connector check (PN801,PN802)NO YES If PALY, AUDIO OUTPUT check Check PN805 audio data PIN10 : DA_LRCK (IC801 PIN60 LRSY) PIN11 : DA_BCK (IC801 PIN59 DATACLK) PIN12 : DA_DATA0 (IC801 PIN58 DATA) NO Check pick up movement NO Check AM5810FP (IC802) NO Check LC78692 (IC801) OK SECTION 4 CD PART ELECTRICAL

1-1. OPEN CLOSE NG Connector locking check (PN804) YES YES YES YES Check power supply circuit (PN805, CN806) CN806 PIN1 : 12V, PIN2 : 6.3V PN805 PIN8 : +5V_AD Defective main power supplyNO Check voltage change LO+, LO- OF IC803 (PN805 PIN23 : OPEN, PIN22 : CLOSE) Defective IC803 Defective mechanism NO Check voltage change of OPEN CLOSE IC803 INPUT voltage PIN6 : 12V, PIN7:6.3V (PN805 PIN2 : BTL_MUTE, 23 : OPEN, 22 : CLOSE) Defective micomNO

1-2. “READING” DISPLAY CHECK (= ONLY “CD” DISPLAY) Conector locking check (PN802, PN804, PN805, CN806) YES YES YES YES YES Check power supply port (PN805, CN806) CN806 PIN1 : 12V, PIN2 : 6.3V, PIN4 : 5V PN805 PIN8 = 5V_AD Defective connector or main power supply Defective IC804 NO Check micom interface circuit (PN805) PN805 PIN1, 3, 4, 15, 19, 26 signal check (1 : CE, 3 : DI, 4 : CLK, 15 : D0, 19 : RST, 18 : FSEQ, 26 : WRQ) PIN3 DI : From DSP to micom PIN15 DO : From micom to DSP Check the waveform #1 Defective micom or connector Defective IC801 NO Check voltage The PIN2 of IC804 IC804 PIN2 : 3.3V NO Defective micom or connector Check reset signal of PN805 PN805 PIN19 : 5V NO

(PN801, PN802) Is reading OK? Defective pick up or IC802 or IC801Does sled move? NONO Check PN802 PIN3, 4 (SL+, SL-) 1-3. READING OK CHECK (= “NO DISC” DISPLAY) Does lense move? (= UP & DOWN) YES A YES Defective pick up or IC802 or IC801 NONO Check PN801 PIN13, 16 (FA+, FA-) B Defective pick up or IC801Does laser light? NONO Check PN801 PIN10 (LD) YES C Defective pick up or IC802 or IC801Does spindle rotate? NONO Check PN802 PIN5, 6 (SP+, SP-) YES D Defective pick up or IC802 or IC801 NONO Check PN801 PIN14, 15 (TA+, TA-) E

appear at (IC802 PIN13 and PN802 PIN3) waveform #2 sled motor wave Does slin waveform appear at (IC802 PIN5) waveform #2 sled drive wave NONO 1-4. READING OK CHECK #A (= “NO DISC” DISPLAY) YES YES A Defective IC802 NO Defective PN802 connector Defective pick up sled motor Check PN802 connector line YES Defective IC801 Does FA+ waveform appear at (IC802 PIN16 and PN801 PIN13) waveform #3 focus coil drive wave Does fain-waveform appear at (IC802 PIN25) waveform #3 focus drive wave NONO 1-5. READING OK CHECK #B (= “NO DISC” DISPLAY) YES YES B Defective IC802 NO Defective PN801 connector Defective pick up focus actuator Check PN801 connector line YES

Is ?V applied to PIN10 of PN801 laser supply voltage check Is 3.3V applied to PIN30, 36, 39, 41, 61, 68, 75 of IC801 RF IC supply voltage check NONO 1-6. READING OK CHECK #C (= “NO DISC” DISPLAY) YES YES Defective IC801 Is 2.3V PIN18 (LDO) of IC801 laser control voltage check NO YES C Defective Q801 or D801 NO Defective PN801 connector Defective pick up laser part Check PN801 connector line YES

appear at (IC802 PIN11 and PN802 PIN5) waveform #4 spindle motor drive wave Does spin waveform appear at (IC802 PIN6) waveform #4 spindle drive wave NONO 1-7. READING OK CHECK #D (= “NO DISC” DISPLAY) YES YES D Defective IC802 NO Defective PN802 connector Defective pick up spindle motor Check PN802 connector line YES

Does FE, TE signal appear? (IC801 PIN10 : RFMON, PIN16 : TE) waveform #6 * REMON is FE Defective IC801 Does TA+ waveform appear at (IC802 PIN17 and PN801 PIN14) waveform #5 tracking coil drive wave Does tain - waveform appear at (IC802 PIN22) waveform #5 tracking drive wave NONO 1-8. READING OK CHECK #E (= “NO DISC” DISPLAY) YES YES E Defective IC802 Does ARF signal appear? (IC801 PIN 2) waveform #6 NO Defective pick up or IC801 Check PN802 connector line NO Defective PN802 connector YES YES NO Defective pick up or IC801

  1. USB PART TROUBLESHOOTING Turn on USB YES NO YES Connector check (PN805, CN806, PN810 ) NO Check power supply circuit (CN806) Check micom interface circuit (PN805) PIN13 : RX (IC805 PIN49 : TXD) PIN14 : TX (IC805 PIN33 : RXD) NO NO Check PN810 PIN2(D-), 3(D+) Check OTI6888 (IC805) Connector check (CN806)OK YES “Checking” or “USB” display check NO YES Check PN810 1PIN : 5VReading OK check NO Check signal STCK, STREQ, STDATA STCK : IC805 PIN52, IC801 PIN55 STREQ : IC805 PIN53, IC801 PIN54 STDATA : IC805 PIN54, IC801 PIN56 If PLAY, AUDIO OUTPUT check NO NO

WAVEFORMS OF MAJOR CHECK POINT #1.MICOM INTERFACE WAVEFORM (PN805 PIN26, 19, 3, 15) during power on PIN26 : WRQ PIN19 : RESET PIN3 : DI (IC801 PIN46 DATA OUT) PIN15 : DO (IC801 PIN45 DATA IN) #1.MICOM INTERFACE WAVEFORM (PN805 PIN26, 19, 3, 15) during normal play PIN26 : WRQ PIN19 : RESET PIN3 : DI (IC801 PIN46 DATA OUT) PIN15 : DO (IC801 PIN45 DATA IN) #1.MICOM INTERFACE WAVEFORM (PN805 PIN4, 1, 18) during power on PIN4 : CL PIN1 : CE PIN18 : FSEQ #1.MICOM INTERFACE WAVEFORM (PN805 PIN4, 1, 18) during normal play PIN4 : CL PIN1 : CE PIN18 : FSEQ

#2.SLED DRIVE AND MOTOR WAVEFORM (IC802 PIN5, 13) when focus search PIN5 : SLIN PIN13 : SL+ #2.SLED DRIVE AND MOTOR WAVEFORM (IC802 PIN5, 13) during normal play PIN5 : SLIN PIN13 : SL+ #3.FOCUS DRIVE AND MOTOR WAVEFORM (IC802 PIN25, IC802 PIN16)

  • When focus search failed or there is no disc on tray PIN25 : FAO PIN16 : FA+ #3.FOCUS DRIVE AND MOTOR WAVEFORM (IC802 PIN25, IC802 PIN16)
  • There is disc on tray and focus search success PIN25 : FAO PIN16 : FA+

#4.SPINDLE DRIVE AND MOTOR WAVEFORM (IC802 PIN6, 11) when TOC reading PIN6 : SPINPIN11 : SP+ #5.TRACK DRIVE AND MOTOR WAVEFORM (IC802 PIN22, IC802 PIN17) during normal play #6.RF, FOCUS AND TRACKING ERROR WAVEFORM (IC801 PIN2, 10, 16) during normal play PIN2 : RFOUT PIN 16 : TE PIN10 : RFMON(FE) PIN22 : TAO PIN17 : TA+

  1. CD SCHEMATIC DIAGRAM
  1. USB SCHEMATIC DIAGRAM

CD P.C.BOARD (TOP VIEW) (BOTTOM VIEW) PRINTED CIRCUIT BOARD DIAGRAM 4-17 4-18