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LG LM-M1030A Service Manual

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❍ SECTION 1. GENERAL
• SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
• ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
• SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
❍ SECTION 2. ELECTRICAL
• ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
• TROUBLESHOOTING GUDIE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
• BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
• SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
• WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35
• PRINTED CIRCUIT DIARGAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37
• INTERNAL BLOCK DIAGRAM OF IC's . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-49
• REPAIRS REGARDING CD MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-57
❍ SECTION 3. EXPLODED VIEWS
• CABINET AND MAIN FRAME SECTION
• TAPE DECK MECHANISM (A/R & A/S : LEFT A/S DECK)
• TAPE DECK MECHANISM (A/R & A/S : RIGHT A/R DECK) . . . . . . . . . . . . . . . . . . . . . . . . .3-5
• CD MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
❍ SECTION 4. SPEAKER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
❍ SECTION 5. REPLACEMENT PARTS LIST
[CONTENTS]
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
. . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
- 1-1 -
. . . . . . . . . . . . . . . . . . . . . . . . . .3-3

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  Summary of Contents for LG LM-M1030A

  • Page 1 [CONTENTS] ❍ SECTION 1. GENERAL • SPECIFICATIONS ............1-2 •...
  • Page 2: 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 3: Notes Regarding Compact Disc Player Repairs

    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 4: 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 5: Specifications

    ❏ SPECIFICATIONS - 1-5 -...
  • Page 6 MEMO - 1-6 -...
  • Page 7: 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 any- one tampers with the adjustment, realignment may be necessary.
  • Page 8 - 2-2 -...
  • Page 9: Troubleshooting

    ❏ TROUBLESHOOTING • CD PART - 2-3 -...
  • Page 10 • OPEN CLOSE NG - 2-4 -...
  • Page 11 • “ READING ” DISPLAY CHECK (= ONLY “CD “DISPLAY) - 2-5 -...
  • Page 12 • READING OK CHECK (= “NO DISC” DISPLAY) - 2-6 -...
  • Page 13 • READING OK CHECK #A (= “NO DISC” DISPLAY) - 2-7 -...
  • Page 14 • READING OK CHECK #B (= “NO DISC” DISPLAY) - 2-8 -...
  • Page 15 • READING OK CHECK #C (= “NO DISC” DISPLAY) - 2-9 -...
  • Page 16 • READING OK CHECK #D (= “NO DISC” DISPLAY) - 2-10 -...
  • Page 17 • READING OK CHECK # E (= “NO DISC” DISPLAY) - 2-11 -...
  • Page 18 • CD PART VOLTAGE SHEET - 2-12 -...
  • Page 19 - 2-13 -...
  • Page 20 - 2-14 -...
  • Page 21 • CD PART WAVEFORMS OF MAJOR CHECK POINT - 2-15 -...
  • Page 22 - 2-16 -...
  • Page 23 - 2-17 -...
  • Page 24 - 2-18 -...
  • Page 25 - 2-19 -...
  • Page 26 - 2-20 -...
  • Page 27 - 2-21 -...
  • Page 28 - 2-22 -...
  • Page 29 - 2-23 -...
  • Page 30 - 2-24 -...
  • Page 31: Block Diagram

    ❏ BLOCK DIAGRAM 2-25 2-26...
  • Page 32: Main Schematic Diagram

    ❏ SCHEMATIC DIAGRAMS • MAIN SCHEMATIC DIAGRAM 2-27 2-28...
  • Page 33 • FRONT/MICOM SCHEMATIC DIAGRAM 2-29 2-30...
  • Page 34 • TUNER/DECK SCHEMATIC DIAGRAM 2-31 2-32...
  • Page 35 • CDP SCHEMATIC DIAGRAM 2-33 2-34...
  • Page 36: Wiring Diagram

    ❏ WIRING DIAGRAM 2-35 2-36...
  • Page 37: Printed Circuit Diagrams

    ❏ PRINTED CIRCUIT DIAGRAMS • MAIN MIC P.C. BOARD (SOLDER SIDE) 2-37 2-38...
  • Page 38 • MAIN MIC P.C. BOARD (COMPONENT SIDE) 2-39 2-40...
  • Page 39 • FRONT P.C. BOARD(COMPONENT SIDE) 2-41 2-42...
  • Page 40 • FRONT P.C. BOARD(SOLDER SIDE) 2-43 2-44...
  • Page 41: Power P.c. Board

    • POWER P.C. BOARD • CD MAIN P.C. BOARD 2-45 2-46...
  • Page 42 • CD MAIN P.C. BOARD (COMPONENT SIDE) - 2-47 -...
  • Page 43 • CD MAIN P.C. BOARD (SOLDER SIDE) - 2-48 -...
  • Page 44: Internal Block Diagram Of Ics

    ❏ INTERNAL BLOCK DIAGRAM OF ICs I BA5810FP (IC803) (GND) PS RESX FUNCTION Level All Active Level Level Shift Shift Shift Reg. Only Deactive Reg. Only Active All Deactive Regulator 2.5V Level Level COMP Shift Shift (GND) - 2-49 -...
  • Page 45 I KIA 78R12 PI (IC903) 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 46 Block Diagram I KIA7805AP/API (IC901) THREE TERMINAL POSITIVE VOLTAGE REGULATORS 5V, 6V, 8V, 9V, 10V, 12, 15V, 18V, 24V. - 2-51 -...
  • Page 47 I BA3126N (IC201) 2-channel head switch for radio cassette recorders - 2-52 -...
  • Page 48 I BU2090F (IC501) 12-bit, Serial IN, Parallel OUT driver Control circuit DATA 12-bit shift register CLOCK Latch Output buffer (open drain) - 2-53 -...
  • Page 49 I KIA4558P/S (IC602) BIPOLAR LINEAR INTEGRATED CIRCUIT - 2-54 -...
  • Page 50 I KA3082 (IC804) 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. - 2-55 -...
  • Page 51 I KIA7812API (IC902) BIPOLAR LINEAR INTEGRATED CIRCUIT FEATURES • Suitable for C-MOS, TTL, the Other Digital IC’s Power Supply • Internal Thermal Overload Protection. • Internal Short Circuit Current Limiting - 2-56 -...
  • Page 52: Repairs Regarding Cd Mechanism

    ❏ REPAIRS REGARDING CD MECHANISM 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 Push two hooks (H) of the BASE MAIN, and open the TRAY LOADING 2.
  • Page 53 MEMO - 2-58 -...
  • Page 54: Section 3. Exploded Views

    SECTION 3. EXPLODED VIEWS NOTE) Refer to “SECTION 5 REPLACEMENT PARTS LIST” in order to look for the part number of each part. TUNER...
  • Page 55: Tape Deck Mechanism (A/R & A/S : Left A/S Deck)

    • TAPE DECK MECHANISM (A/R & A/S : LEFT A/S DECK) LOCA. NO. PART NO. DESCRIPTION SPECIFICATION 6720AG0002B DECK,AUDIO CWM42FR31 TOKYO PIGEON L-DOUBL 6768R-PP03A DECK MECHANISM PARTS 33-160-4309 PIGEON PRESS CASSE 6768R-GP03B DECK MECHANISM PARTS 50-222-4578 PIGEON GEAR IDLER 6768R-SP01F DECK MECHANISM PARTS 01-082-4598 PIGEON SPRING CWL4 6768R-MP01C...
  • Page 56: Tape Deck Mechanism (A/R & A/S : Right A/R Deck)

    • TAPE DECK MECHANISM (A/R & A/S : RIGHT A/R DECK) LOCA. NO. PART NO. DESCRIPTION SPECIFICATION 6720AG0002B DECK,AUDIO CWM42FR31 TOKYO PIGEON L-DOUBL 6768R-UP03D DECK MECHANISM PARTS 50-093-4895 PIGEON PWB UNIT CW 6768R-BP03D DECK MECHANISM PARTS 02-083-4254 PIGEON BELT/FELT C 6768R-BP03E DECK MECHANISM PARTS 02-083-4256 PIGEON BELT/FELT C...
  • Page 57: Cd Mechanism

    ❏ CD MECHANISM...
  • Page 58 MEMO MEMO...
  • Page 59: Section 4. Speaker Section

    SECTION 4. SPEAKER SECTION ❏ MODEL: LMS-M1030 RUN DATE : 10-JAN-2004 LOCA. NO. PART NO. DESCRIPTION SPECIFICATION REMARKS 3720RMF052A PANEL,FRONT SPK LMS-1030 MOLD PANEL STANDA 6400TETB03A SPEAKER,TWEETER 06N45EHC2411 EAW TWEETER(CONE) 6400WETJ05A SPEAKER,WOOFER 16L90EHC2409A EAW WOOFER LMS-1 4980RM0001A SUPPORTER SPK LMS-1030 MOLD W/F SUPPORT 4766RM0035A FELT LMS-1030( BLACK ) DUCT...
  • Page 60 MEMO - 4-2 -...