LG LM-M530A/D/X Service Manual
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LG LM-M530A/D/X Service Manual

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MINI COMPONENT
SYSTEM
SERVICE MANUAL
MODEL: LM-M530A/D/X, LMS-M530
P/N : 3829RAT083J
JULY, 2003

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Summary of Contents for LG LM-M530A/D/X

  • Page 1 MINI COMPONENT SYSTEM SERVICE MANUAL MODEL: LM-M530A/D/X, LMS-M530 P/N : 3829RAT083J JULY, 2003...

  • Page 2: Table Of Contents

    CONTENTS SECTION 1. GENERAL • SERVICING PRECAUTIONS ........................1-2 • ESD PRECAUTIONS ..........................1-4 • SPECIFICATIONS ............................. 1-5 SECTION 2. ELECTRICAL • ADJUSTMENTS ............................2-1 • TROUBLESHOOTING ..........................2-3 • CD PART VOLTAGE SHEET ........................2-21 • CD PART WAVEFORMS OF MAJOR CHECK POINT ................2-24 •...

  • Page 3: Section 1. General

    SECTION 1. GENERAL ❏ 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 4 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 5: 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 6: Specifications

    ❏ SPECIFICATIONS Power supply Refer to the back panel of the unit Power consumption General Net weight 7.7kg Extemal dimensions(WxHxI) 273x330x360 Frequency Response 40Hz ~ 18000Hz Signal-to-noise ratio 70dB Dynamic range 70dB Tuning Range FM1 87.50MHz ~108MHz or 65 ~ 74MHZ Intermediate Frequency 10.7MHz Signal-to-noise ratio...
  • Page 7 - 1-6 -...

  • Page 8: Section 2. Electrical

    SECTION 2. ELECTRICAL ❏ ADJUSTMENTS This set has been aligned at the factory and normally will not require further adjustment. As a result, it is not recommended that any attempt is made to modificate any circuit. If any parts are replaced or if anyone tampers with the adjustment, realignment may be necessary.
  • Page 9 3. RECORD BIAS ADJUSTMENT Deck Mode Test Tape Test Point Adjustment Adjust for ERASE HEAD 60kHz±5kHz (Auto stop) Rec/Pause MTT-5511 L203 WIRE(PN202) 85kHz±5kHz(Auto Reverse) Record/Playback PN202 Frequency Counter Head and Pause Mode Test Tape Unit MTT-5511 Record/Playback head Figure 3. Record Bias Adjustment Connection Diagram - 2-2 -...

  • Page 10: Troubleshooting

    ❏ TROUBLESHOOTING • CD PART TURN ON CD OPEN CLOSE CHECK CONNECTOR CHECK ( PN808,PN807 ) CHECK POWER SUPPLY CIRCUIT( PN808 ) CHECK MICOM INTERFACE CIRCUIT( PN807 ) “ READING ” DISPLAY CHECK CONNECTOR CHECK ( PN808,PN807,PN802,PN801 ) CHECK MICOM INTERFACE CIRCUIT( PN807 ) READING OK CHECK CONNECTOR CHECK(PN801,PN802) CHECK PICKUP MOVEMENT...
  • Page 11 • OPEN CLOSE NG CONNECTOR LOCKING CHECK ( PN808,PN807 ) CHECK POWER SUPPLY CIRCUIT( PN808 ,PN807) DEFECTIVE MAIN PN808 PIN 5 = 6.2V, PIN 7 = 5V POEWR SUPPLY PN807 PIN 1 = 5V DEFECTIVE MICOM CHECK VOLTAGE CHANGE OF OPEN CLOSE , AND BTLMUTE VOLTAGE(= 5V) (PN807 PIN 20:OPEN, 19:CLOSE, 4:BTLMUTE) CHECK VOLTAGE CHANGE LO+, LO- OF IC803...
  • Page 12 • “ READING ” DISPLAY CHECK (= ONLY “CD “DISPLAY) CONNECTOR LOCKING CHECK (PN808,PN807,PN802,PN801 ) CHECK POWER SUPPLY CHECK POWER SUPPLY DEFECTIVE CONNECTOR OR PORT( PN808 ,PN807) PORT( PN808 ,PN807) MAIN POWER SUPPLAY PN808 PIN 5 = 6.2V, PIN 7 = 5V PN808 PIN 5 = 6.2V, PIN 7 = 5V PN807 PIN 1 = 5V PN807 PIN 1 = 5V...
  • Page 13 • READING OK CHECK (= “NO DISC” DISPLAY) CONNECTOR LOCKING CHECK(PN801,PN802) DOES SLED MOVE ? A A A A CHECK PN802 PIN 3,4( SL+,SL-) DEFECTIVE PICKUP OR DEFECTIVE PICKUP OR IC803 OR IC801 OR IC802 IC803 OR IC801 OR IC802 DOES LENSE MOVE ? (= UP &...
  • Page 14 • READING OK CHECK #A (= “NO DISC” DISPLAY) A A A A DOES SL+ WAVEFORM APPEAR AT ( IC803 PIN14 AND PN802 PIN3) WAVEFORM #2 SLED MOTOR WAVE DOES SLIN WAVEFORM APPEAR AT DEFECTIVE IC801 ( IC803 PIN 5) WAVEFORM #2 SLED DRIVE WAVE DEFECTIVE IC803...
  • Page 15 • READING OK CHECK #B (= “NO DISC” DISPLAY) B B B B DOES FA+ WAVEFORM APPEAR AT ( IC803 PIN15 AND PN801 PIN16) WAVEFORM #3 FOCUS COIL DRIVE WAVE DOES FAIN- WAVEFORM APPEAR AT DEFECTIVE IC801 ( IC803 PIN 26) WAVEFORM #3 FOCUS DRIVE WAVE DEFECTIVE IC803...
  • Page 16 • READING OK CHECK #C (= “NO DISC” DISPLAY) C C C C IS ?V APPLIED TO PIN10 OF PN801 LASER SUPPLY VOLTAGE CHECK IS 3.3 V APPLIED TO PIN3 OF IC802 RF IC SUPPLY VOLTAGE DEFECTIVE IC805 CHECK IS 2.0 V PIN2 OF IC802 DEFECTIVE IC802 LASER CONTROL VOLTAGE CHECK...
  • Page 17 • READING OK CHECK #D (= “NO DISC” DISPLAY) D D D D DOES SP+ WAVEFORM APPEAR AT ( IC803 PIN12 AND PN802 PIN6)WAVEFORM #4 SPINDLE MOTOR DRIVE WAVE DOES SPIN WAVEFORM APPEAR AT( IC803 PIN 6) DEFECTIVE IC801 WAVEFORM #4 SPINDLE DRIVE WAVE DEFECTIVE IC803 DEFECTIVE PN802...
  • Page 18 • READING OK CHECK # E (= “NO DISC” DISPLAY) E E E E DOES TA+ WAVEFORM APPEAR AT ( IC803 PIN17 AND PN801 PIN15) WAVEFORM #5 TRACKING COIL DRIVE WAVE DOES TAIN- WAVEFORM APPEAR AT DEFECTIVE IC801 ( IC803 PIN 23) WAVEFORM #5 TRACKING DRIVE WAVE DEFECTIVE IC803...
  • Page 19 • AUDIO PART P-SENS PART Does +5V appear at ZD901? Check the waveform of D913(cathod). Replace the D703 Check the pattern of Check the R768 and IC301 Pin replace ZD901. VKK PART Does DC - 33V appear at CN302 Pin Dose -33V appear at ZD902(-) Replace the ZD902...
  • Page 20 POWER CIRCUIT Check the Fuse Replace the Fuse Check the AC Output of Check the DC output Check the power Ass’y or CN901 pin1, 5 of C901(+), C902(-) Replace the Transformer Replace the D901, D902, D903, D904 Check the DC Output of C930(+) Check the AC Output of CN701 PIN 9, 10...
  • Page 21 Muting circuit (MUTE) Dose “Low” appear at Q702 “B” Check the connector of Q702 “B” and GND Check the “High” of Q701, Q751 “B” Replace the TR MUTE AUDIO ABNORMAL Check the output of IC601 Pin 12, 17 Refer to “IC601 Troubleshooting”...
  • Page 22 FUNCTION MODE AUDIO ABNORMAL TAPE Check the signal input of IC601 pin 6, 23 Refer to “IC202 Troubleshooting” Chekc the signal input of IC601, pin 5, 24 Check the signal input of JK102 Check the signal input of IC601 pin 3, 26 Check the signal of CN513 pin 1, 3 or Refer to “CD Troubleshooting”...
  • Page 23 IC301 Troubleshooting Check the power supplying IC301 Pin 17, 46, 72, 90? Refer to “Power Circuit Troubleshooting” Check the 5V of IC301 pin26 Check the P-SENS Check the oscillation of X301 Replace the X301 When power supplying to IC301 pin11. (High ©...
  • Page 24 IC601 Troubleshooting Check the power supplying to IC601 Pin 1 Refer to “Power Circuit Troubleshooting” Check the Pulse waveform of IC601 pin14, 15 (VOL DIAL) Check the IC301 pin 76, 75, 5, 10 Replace the “IC301 Check the Output of IC601 pin 7, 22 Troubleshooting”...
  • Page 25 Play Check the VCC supplying to IC202 pin 18 Refer to “Power Circuit Troubleshooting” Check the signal output of IC202 pin 5, 20 Check the Deck Mechanism Replace the Deck Check the Muting Circuit Mecha. Replace the IC202 - 2-18 -...
  • Page 26 REC (Q252, Q202 ON / R273, R223 High) Check signal supplied to IC202 pin 11, 14? Check the “Low” of Q253, Q203 “B” Refer to “IC203 Troubleshooting” Replace the Q253, Q203 Check the output of IC202 Pin9, 16 Check the Vcc power of IC202 Pin18 Check the IC201 pin6 : 12V and pin 4 : High Check the power or Refer to “IC203 Troubleshooting”...
  • Page 27 Dubbing(“NORMAL or REC “//“HIGH”) Q252, 202 “OFF”//“ON” : R273, 223 “LOW”//“HIGH Q253, 203 “ON”//“OFF” Refer to “IC203 Troubleshooting” Refer to “REC Troubleshooting” - 2-20 -...

  • Page 28: Cd Part Voltage Sheet

    ❏ CD PART VOLTAGE SHEET PIN NO. STOP CD-DA PLAY MP3 PLAY PIN NO. STOP CD-DA PLAY MP3 PLAY IC801 MN6627933CG - 2-21 -...
  • Page 29 PIN NO. STOP CD-DA PLAY MP3 PLAY PIN NO. STOP CD-DA PLAY MP3 PLAY IC802 IC803 AN22004A BA5810FP 0 (*CD-RW: 3.0) 0 (*CD-RW: 3.0) 0 (*CD-RW: 3.0) - 2-22 -...
  • Page 30 PIN NO. STOP CD-DA PLAY MP3 PLAY PIN NO. STOP CD-DA PLAY MP3 PLAY IC804 IC805 M12L16161A UTC LD1117A 2 4.77 - 2-23 -...

  • Page 31: Cd Part Waveforms Of Major Check Point

    ❏ CD PART WAVEFORMS OF MAJOR CHECK POINT # X. MICOM IN TERFACE WAVEFORM #2. S LED DRIVE AND MOTOR WAVEFORM (PN807 pin XX, X3, X4, X5) d uring normal play (IC803 pin 5, X4) wh en foc us se arch IC803: SLI N PN807: ST AT PN807: MDATA...
  • Page 32 #4. SPINDL E DRIVE AND MOTOR WAVEFORM #5. T RACK DRIVE AND MOTOR WAVEFORM (IC803 pin 6, 2) wh en TOC reading (TP860, IC8 03 pin 23) durin g normal p lay TP 860 IC803: SP IN IC803: T A+ IC803: SP + #6.
  • Page 33 • Power P.C. BOARD NOTE: Warning Parts that are shaded are critical With respect to risk of fire or electrical shock. - 2-46 -...
  • Page 34 • CD MAIN P.C. BOARD (COMPONENT SIDE) - 2-47 -...
  • Page 35 • CD MAIN P.C. BOARD (SOLDER SIDE) - 2-48 -...
  • Page 36 ❏ INTERNAL BLOCK DIAGRAM OF ICs I MN6627933CG (IC801) Pin Assignment Note) Pins marked with an asterisk can be switched to different signals by using microcontroller commands. - 2-49 -...
  • Page 37 Internal Block Diagram - 2-50 -...
  • Page 38 Pin Descriptions Pin No. Symbol Function DRAM data signal I/O 11 DRAM data signal I/O 10 DRAM data signal I/O 9 DRAM data signal I/O 8 UDQM SDRAM upper byte data mask signal output SDRCK SDRAM clock signal output DRAM address signal output 11 DRAM address signal output 9 DRAM address signal output 8 DRAM address signal output 7...
  • Page 39 Pin No. Symbol Function PLLFO PLL loop filter pin (for speed comparison) AVSS1 Ground 1 for analog circuits LOOUTL L-ch audio output for line-out output LOVSS1 Ground for line-out output LOOUTR R-ch audio output for line-out output LOVDD1 Power supply for line-out output N.C.
  • Page 40 I BA5810FP (IC803) I KA3082 (IC 804) Bi-Directional DC Motor Driver Description The KA3082 is a monolithic integrated circuit designed for driving bi-directional DC motor with braking and speed control, and it is suitable for the loading motor driver of VCR, CDP, and TOY systems. The speed control can be achieved by adjusting the external voltage of the speed control pin.
  • Page 41 I KIA 78R12 PI (IC 903) 4 TERMINAL LOW DROP VOLTAGE REGULATOR The KIA78RXX Series are Low Drop Voltage Regulator suitable for various electronic equipments. It provides constant voltage power source with TO-220 4 termainal lead full molded PKG. The Regulator has multi function such as over current protection, overheat protection and ON/OFF control.

  • Page 42: Block Diagram

    Block Diagram I KIA7805AP/API (IC 901) THREE TERMINAL POSITIVE VOLTAGE REGULATORS 5V, 6V, 8V, 9V, 10V, 12, 15V, 18V, 24V. EQUIVALENT CIRCUIT - 2-55 -...
  • Page 43 I BA3126N (IC 201) 2-channel head switch for radio cassette recorders - 2-56 -...
  • Page 44 I BU2090F (IC 501) 12-bit, Serial IN, Parallel OUT driver Block diagram Control circuit DATA 12-bit shift register CLOCK Latch Output buffer (open drain) PIN DESCRIPTION Pin No. Pin name Function BU2090/F/FS BU2092/F BU2092/FV DATA Serial data input CLOCK Data shift clock input Data latch clock input parallel data output parallel data output...

  • Page 45: Repairs Regarding Cd Mechanism

    ❏ REPAIRS REGARDING CD MECHANISM I IMPROVED METHOD - WHEN THE TRAY GEARS WERE DISTORTED BASE MAIN GEAR PU DOWN GEAR MAIN GEAR CAM TRAY LOADING PICK UP 1. How to open the tray ➀ ➁ Push two hooks (H) of the BASE MAIN, and open the TRAY LOADING 2.
  • Page 46 SECTION 4. SPEAKER SECTION MODEL: LMS-M530 RUN DATE :13.JULY.2003 LOCA.NO. PART NO DESCRIPTION SPECIFICATION REMARKS 3701RM0048A NET ASSEMBLY SPK LMS-230/530 JERSEY NET ASS 3720RMM004A PANEL,AUDIO SPK LMS-230/530 MOLD FRONT (ST 6400SCSX01D SPEAKER,TWEETER FE-576E SAMMI(DT-13A36L-2)DOME 6400WSMG02A SPEAKER,WOOFER CW-125B60L-2 SAMMI WOOFER LMS- 4766RM0014C FELT LMS-230/530 BLACK CABINET FEL...
  • Page 47 - 4-2 -...
  • Page 48 BLOCK DIAGRAM NOTE: Warning Parts that are shaded are critical With respect to risk of fire or electrical shock. 2-26 2-27...
  • Page 49 SCHEMATIC DIAGRAMS • MAIN SCHEMATIC DIAGRAM NOTE: Warning NOTE: Parts that are shaded are critical With respect Shaded(I) parts are critical for safety.Replace only to risk of fire or electrical shock. with specified part number. 2. Voltages are DC-measured with a digital voltmefer during Play mode.
  • Page 50 • FRONT SCHEMATIC DIAGRAM 2-30 2-31...
  • Page 51 • TUNER/DECK SCHEMATIC DIAGRAM 2-32 2-33...
  • Page 52 • CDP SCHEMATIC DIAGRAM 2-34 2-35...
  • Page 53 WIRING DIAGRAM NOTE: Warning Parts that are shaded are critical With respect to risk of fire or electrical shock. 2-36 2-37...
  • Page 54 PRINTED CIRCUIT DIAGRAMS • MAIN P.C. BOARD (SOLDER SIDE) 2-38 2-39...
  • Page 55 • MAIN P.C. BOARD (COMPONENT SIDE) 2-40 2-41...
  • Page 56 • FRONT P.C. BOARD(COMPONENT SIDE) 2-42 2-43...
  • Page 57 • FRONT P.C. BOARD(SOLDER SIDE) 2-44 2-45...

  • Page 58: Section 3. Exploded Views

    SECTION 3. EXPLODED VIEWS NOTE) Refer to “SECTION 5 REPLACEMENT PARTS LIST” in order to look for the • CABINET AND MAIN FRAME SECTION part number of each part. TUNER...

  • Page 59: Tape Deck Mechanism: Auto Stop Deck(Optional)

    • TAPE DECK MECHANISM: AUTO STOP DECK(OPTIONAL) LOCA. NO PART NO. SPECIFICATION 6730R-G007A CWL44FF25 TOKYO PIGEON L-DOUBL 6768R-UP01A 50-093-4249 PIGEON UNIT PCB AS 6768R-BP01B 02-084-4202 PIGEON BELT / FELT C 6768R-BP01A 02-084-4204 PIGEON BELT / FELT C 6768R-AP01D 50-239-4027 PIGEON ARM CWL44 6768R-AP01E 50-239-4026 PIGEON ARM CWL44 6768R-SP01E...

  • Page 60: Tape Deck Mechanism: Auto Reverse Deck

    • TAPE DECK MECHANISM: AUTO REVERSE DECK LOCA. NO PART NO. SPECIFICATION 6730R-G007B CDM-H1323 CD CHAN 6768R-UP01A 50-093-4249 PCB AS 6768R-BP01B 02-084-4202 BELT/FELT 6768R-BP01A 02-084-4204 BELT/FELT 6768R-AP01D 50-239-4027 CWL44 6768R-AP01E 50-239-4026 ARM 6768R-SP01E 01-082-4654 SPRING 6768R-QP01A 50-093-4316 MOTOR 6768R-GP01A 50-093-4063 GEAR 6768R-SP01F 01-082-4598 SPRING 6768R-MP01C...

  • Page 61: Cd Mechanism

    • CD MECHANISM LOCA.NO. PART NO DESCRIPTION SPECIFICATION 4405RBE004C MECHANISM ASSEMBLY CDM-H1503 3 CD CHANGER 3041RB0002C BASE ASSEMBLY PU(SPRING DAMPER) 6717RCA001A PICK UP ASSY KSM-213VSCM SONY FRONT LOADING 3390RB0002A TRAY DISC(CDM-H1503) 4470RB0005A GEAR TRAY (CDM-H1503) 4681RBA001A MOTOR ASSEMBLY TRAY (CDM-H1503) 6871RF9211A PWB(PCB) ASSEMBLY,FRONT 1503 T/D SENSOR 3390RB0001A TRAY...

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