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❍ SECTION 1.GENERAL
• SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
• ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
• SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
• LOCATION OF CUSTOMER CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
❍ SECTION 2. AUDIO PART
• AUDIO TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
• BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
• SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
• WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
• PRINTED CIRCUIT DIARGAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
❍ SECTION 3.DVD PART
• ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
• DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING . . . . . . . . . . . . . . . . .3-9
• BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22
• DVD PART SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23
• VOLTAGE SHEET ((IC &TR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31
• PRINTED CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-33
❍ SECTION 4. EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
❍ SECTION 5. SPEAKER PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
❍ SECTION 6. REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
[CONTENTS]
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Summary of Contents for LG LH-D6240A
- Page 1 [CONTENTS] ❍ SECTION 1.GENERAL • SERVICING PRECAUTIONS ..........1-2 •...
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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: Location Of Customer Controls
❏ LOCATION OF CUSTOMER CONTROLS FRONT PANEL DISPLAY WINDOW - 1-6 -... - Page 7 REAR PANEL - 1-7 -...
- Page 8 Remote Control - 1-8 -...
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Page 9: Section 2. Audio Part
SECTION 2. AUDIO PART ❏ AUDIO TROUBLESHOOTING GUIDE 1. POWER SUPPUY CIRCUIT - 2-1 -... - Page 10 2. FRONT CIRCUIT (1/2) - 2-2 -...
- Page 11 3. FRONT CIRCUIT (2/2) - 2-3 -...
- Page 12 MEMO - 2-4 -...
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Page 13: Block Diagram
❏ BLOCK DIAGRAM... -
Page 14: Schematic Diagrams
❏ SCHEMATIC DIAGRAMS • POWER (SMPS) SCHEMATIC DIAGRAM... - Page 15 • µ-COM SCHEMATIC DIAGRAM 2-10...
- Page 16 • FRONT & POWER(2nd) SCHEMATIC DIAGRAM 2-11 2-12...
- Page 17 • DAP SCHEMATIC DIAGRAM 2-13 2-14...
- Page 18 • AMP SCHEMATIC DIAGRAM 2-15 2-16...
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Page 19: Wiring Diagram
❏ WIRING DIAGRAM 2-17 2-18... -
Page 20: Printed Circuit Board Diagrams
❏ PRINTED CIRCUIT BOARD DIAGRAMS • MAIN P.C. BOARD DIAGRAM (SOLDER SIDE) 2-19 2-20... - Page 21 • MAIN P.C. BOARD DIAGRAM (COMPONENT SIDE) 2-21 2-22...
- Page 22 • POWER(SMPS) P.C. BOARD (SOLDER SIDE) 2-23 2-24...
- Page 23 • FRONT P.C. BOARD DIAGRAM (SOLDER SIDE) 2-25 2-26...
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Page 24: Section 3. Dvd Part
SECTION 3. DVD PART DVD TROUBLESHOOTING GUIDE 1. Power check flow - 3-1 -... - Page 25 2. Test & debug flow - 3-2 -...
- Page 26 - 3-3 -...
- Page 27 - 3-4 -...
- Page 28 - 3-5 -...
- Page 29 - 3-6 -...
- Page 30 - 3-7 -...
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Page 31: System 27Mhz Clock,Reset,Flash R/W Signal
❏ DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL 1) MT1379 main clock is at 27MHz(X501) 2) MT1336 reset is high active - 3-8 -... - Page 32 3) RS232 waveform during procedure(Downloading) 4) Flash R/W enable signal during download(Downloading) - 3-9 -...
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Page 33: Sdram Clock
2. SDRAM CLOCK 1) MT1379 main clock is at 27MHz(X501) 3. TRAY OPEN/CLOSE SIGNAL 1) Tray open/close waveform - 3-10 -... - Page 34 2) Tray close waveform 3) Tray open waveform - 3-11 -...
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Page 35: Sled Control Related Signal (No Disc Condition)
4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) 5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION) - 3-12 -... -
Page 36: Disc Type Judgement Waveform
6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION) 7. DISC TYPE JUDGEMENT WAVEFORM - 3-13 -... - Page 37 - 3-14 -...
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Page 38: Focus On Waveform
8. FOCUS ON WAVEFORM - 3-15 -... -
Page 39: Spindle Control Waveform (No Disc Condition)
9. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION) - 3-16 -... -
Page 40: Tracking Control Related Signal(System Checking)
10. TRACKING CONTROL RELATED SIGNAL(System checking) - 3-17 -... -
Page 41: Mt1379 Audio Optical And Coaxial Output (Aspdif)
11. RF WAVEFORM 12. MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT (ASPDIF) - 3-18 -... -
Page 42: Mt1379 Video Output Waveform
13. MT1379 VIDEO OUTPUT WAVEFORM 1) Full colorbar signal(CVBS) 2) Y - 3-19 -... - Page 43 3) C 14. AUDIO OUTPUT FORM AUDIO DAC 1) Audio related Signal - 3-20 -...
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Page 44: Dvd Part Schematic Diagrams
❏ DVD PART SCHEMATIC DIAGRAMS • MPEG SCHEMATIC DIAGRAM 3-21 3-22... - Page 45 • SERVO SCHEMATIC DIAGRAM 3-23 3-24...
- Page 46 • AUDIO SCHEMATIC DIAGRAM 3-25 3-26...
- Page 47 ❏ VOLTAGE SHEET (IC& TR) 3-27 3-28...
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Page 48: Printed Circuit Diagram
❏ PRINTED CIRCUIT DIAGRAM • DVD P.C. BOARD(SOLDER SIDE) 3-29 3-30... - Page 49 • DVD P.C. BOARD (COMPONENT SIDE) 3-31 3-32...
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Page 50: Section 4. Exploded Views
SECTION 4. EXPLODED VIEWS ❏ CABINET AND MAIN FRAME SECTION NOTE) Refer to “SECTION 6 REPLACEMENT PARTS LIST” in order to look for the part number of each part. - Page 51 • DECK MECHANISM EXPLODED VIEW...
- Page 52 MEMO MEMO...
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Page 53: Section 5. Speaker Section
SECTION 5. SPEAKER SECTION ❏ MODEL : LHS-D6240W - 5-1 -... - Page 54 ❏ MODEL : LHS-D6240T - 5-2 -...