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Related Manuals for LG LH-D6245A
Summary of Contents for LG LH-D6245A
- Page 1 DVD/CD RECEIVER SERVICE MANUAL CD-R/RW MODEL:LH-D6245A LHS-D6245T, LHS-D6245W...
- Page 2 [CONTENTS] ❍ SECTION 1.GENERAL • SERVICING PRECAUTIONS ..........1-2 •...
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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
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 - 1-5 -... -
Page 7: Location Of Customer Controls
❏ LOCATION OF CUSTOMER CONTROLS FRONT PANEL DISPLAY WINDOW - 1-6 -... - Page 8 REAR PANEL - 1-7 -...
- Page 9 Remote Control - 1-8 -...
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Page 10: Section 2. Audio Part
SECTION 2. AUDIO PART ❏ AUDIO TROUBLESHOOTING GUIDE 1. POWER SUPPUY CIRCUIT - 2-1 -... - Page 11 2. FRONT CIRCUIT (1/2) - 2-2 -...
- Page 12 3. FRONT CIRCUIT (2/2) - 2-3 -...
- Page 13 MEMO - 2-4 -...
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Page 14: Block Diagram
❏ BLOCK DIAGRAM... -
Page 15: Schematic Diagrams
❏ SCHEMATIC DIAGRAMS • POWER (SMPS) SCHEMATIC DIAGRAM... - Page 16 • µ-COM SCHEMATIC DIAGRAM 2-10...
- Page 17 • FRONT & POWER(2nd) SCHEMATIC DIAGRAM 2-11 2-12...
- Page 18 • DAP SCHEMATIC DIAGRAM 2-13 2-14...
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Page 19: Amp Schematic Diagram
• AMP SCHEMATIC DIAGRAM 2-15 2-16... -
Page 20: Wiring Diagram
❏ WIRING DIAGRAM 2-17 2-18... -
Page 21: Printed Circuit Board Diagrams
❏ PRINTED CIRCUIT BOARD DIAGRAMS • MAIN P.C. BOARD DIAGRAM (SOLDER SIDE) 2-19 2-20... - Page 22 • MAIN P.C. BOARD DIAGRAM (COMPONENT SIDE) 2-21 2-22...
- Page 23 • POWER(SMPS) P.C. BOARD (SOLDER SIDE) 2-23 2-24...
- Page 24 • FRONT P.C. BOARD DIAGRAM (SOLDER SIDE) 2-25 2-26...
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Page 25: Section 3. Dvd Part
SECTION 3. DVD PART DVD TROUBLESHOOTING GUIDE 1. Power check flow - 3-1 -... - Page 26 2. Test & debug flow - 3-2 -...
- Page 27 - 3-3 -...
- Page 28 - 3-4 -...
- Page 29 - 3-5 -...
- Page 30 - 3-6 -...
- Page 31 - 3-7 -...
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Page 32: 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 33 3) RS232 waveform during procedure(Downloading) 4) Flash R/W enable signal during download(Downloading) - 3-9 -...
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Page 34: 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 35 2) Tray close waveform 3) Tray open waveform - 3-11 -...
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Page 36: 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 37: Disc Type Judgement Waveform
6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION) 7. DISC TYPE JUDGEMENT WAVEFORM - 3-13 -... - Page 38 - 3-14 -...
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Page 39: Focus On Waveform
8. FOCUS ON WAVEFORM - 3-15 -... -
Page 40: Spindle Control Waveform (No Disc Condition)
9. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION) - 3-16 -... -
Page 41: Tracking Control Related Signal(System Checking)
10. TRACKING CONTROL RELATED SIGNAL(System checking) - 3-17 -... -
Page 42: Mt1379 Audio Optical And Coaxial Output (Aspdif)
11. RF WAVEFORM 12. MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT (ASPDIF) - 3-18 -... -
Page 43: Mt1379 Video Output Waveform
13. MT1379 VIDEO OUTPUT WAVEFORM 1) Full colorbar signal(CVBS) 2) Y - 3-19 -... - Page 44 3) C 14. AUDIO OUTPUT FORM AUDIO DAC 1) Audio related Signal - 3-20 -...
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Page 45: Dvd Part Schematic Diagrams
❏ DVD PART SCHEMATIC DIAGRAMS • MPEG SCHEMATIC DIAGRAM 3-21 3-22... -
Page 46: Servo Schematic Diagram
• SERVO SCHEMATIC DIAGRAM 3-23 3-24... -
Page 47: Audio Schematic Diagram
• AUDIO SCHEMATIC DIAGRAM 3-25 3-26... -
Page 48: Voltage Sheet (Ic& Tr)
❏ VOLTAGE SHEET (IC& TR) 3-27 3-28... -
Page 49: Printed Circuit Diagram
❏ PRINTED CIRCUIT DIAGRAM • DVD P.C. BOARD(SOLDER SIDE) 3-29 3-30... - Page 50 • DVD P.C. BOARD (COMPONENT SIDE) 3-31 3-32...
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Page 51: 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 52: Deck Mechanism Exploded View
• DECK MECHANISM EXPLODED VIEW LOCA. NO. PART NO. DESCRIPTION SPECIFICATION 6721RJ0381C DECK ASSEMBLY,AUDIO DECK/MECHA DP-7A -HZ-MITSUMI VA9 4861R-0016D CLAMP ASSEMBLY DECK/MECHA DISC DP-7C(7A) -HZ 3041R-M018A BASE ASSEMBLY MAIN DP-7A-HZ 3041R-M044D BASE ASSEMBLY SLED DP-7A-HZ -MITSUMI VA9 3300R-0547A PLATE CLAMP 5016H-1016B MAGNET CLAMP(LDM-R608,10*5,1*1.5T) - Page 53 MEMO MEMO...
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Page 54: Section 5. Speaker Section
SECTION 5. SPEAKER SECTION ❏ MODEL : LHS-D6245W - 5-1 -... - Page 55 ❏ MODEL : LHS-D6245T - 5-2 -...
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