Table Of Contents - LG LH-T7652SB Service Manual

Table of Contents

Service Manual1
Table Of Contents2
Servicing Precautions3
Notes Regarding Handling Of The Pick-Up3
Repair Notes3
Section 1. General3
Preparations4
Esd Precautions5
Electrostatically Sensitive Devices (Esd)5
Caution. Graphic Symbols5
Service Information For Eeprom6
Detect New Eeprom6
Specifications7
Speakers(Lhs-76Sb)7
Amplifier(Lh-T76'S)7
Audio Troubleshooting Guide8
Power Supply Circuit8
Section 2. Audio Part8
Front Circuit9
Wiring Diagram12
Block Diagram13
Circuit Diagrams14
Smps(Power) Circuit Diagram14
Power Interface Circuit Diagram15
Μ-Com(Main) Circuit Diagram16
Servo Circuit Diagram17
I/O Circuit Diagram18
Mic Circuit Diagram19
Usb Circuit Diagram20
Mic & Usb Circuit Diagram21
Hdmi Circuit Diagram(Optional Part)22
Front Circuit Diagram23
Printed Circuit Board Diagrams24
Main P.c. Board Diagram ( Top View )24
Main P.c. Board Diagram ( Bottom View )25
Smps P.c. Board26
Key P.c. Board27
Timer P.c. Board27
Top View27
Bottom View27
Electrical Troubleshooting Guide28
Power On28
Section 3. Dvd & Amp Part28
Test & Debug Flow29
Audio Μ-Com Circuit(Dvd & Amp)35
Opt.35
Details And Waveforms On System Test And Debugging36
System 27Mhz Clock,Reset,Flash R/W Signal36
Es8381 Main Clock Is At 27Mhz(X501)36
Es8381 Reset Is High Active36
Flash R/W Enable Signal During Download37
Sdram Clock37
Tray Open/Close Signal38
Tray Open/Close Waveform38
Tray Close Waveform38
Tray Open Waveform39
Sled Control Related Signal (No Disc Condition)39
Lens Control Related Signal(No Disc Condition)40
Laser Power Control Related Signal(No Disc Condition)40
Disc Type Judgement Waveforms41
Focus On Waveforms43
Spindle Control Waveforms (No Disc Condition)44
Tracking Control Related Signal44
Es6698Fd Video Output Waveforms45
Full Colorbar Signal(Composit)45
Audio Output From Pwm Ic46
Audio L/R46
Audio Related Signal47
Dvd & Amp Waveforms48
Dvd & Amp Circuit Diagrams50
Mpeg Circuit Diagram50
Dsp Circuit Diagram51
Amp Circuit Diagram52
Dsp P.c. Board Diagram53
Amp P.c. Board Diagram54
Cabinet And Main Frame Section55
Section 4. Exploded Views55
Deck Mechanism Exploded View56
Packing Accessory Section58
Speaker Section59
Lhs-76Sb59
Center Speaker59
Front/Rear Speaker(Lhs-76Sbs)60
Passive Subwoofer Speaker(Lhs-76Sbw)61