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LHS-76SBC
LG LHS-76SBC User Manual
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DVD/CD RECEIVER
SER
VICE MANUAL
MODE
L
: LH-T7652SB/LHS-76SBC/LHS-76SBS/LHS-76SBW
SERVICE MANUAL
MODE
L
: LH-T7652SB/LHS-76SBC/
LHS-76SBS/LHS-76SBW
2
Table of Contents
Default Chapter
1
Service Manual
1
Table of Contents
2
Servicing Precautions
3
Notes Regarding Handling of the Pick-Up
3
Repair Notes
3
Section 1. General
3
Preparations
4
Caution. Graphic Symbols
5
Electrostatically Sensitive Devices (ESD)
5
Esd Precautions
5
Detect New Eeprom
6
Service Information for Eeprom
6
Amplifier(Lh-T76’S)
7
Speakers(Lhs-76Sb)
7
Specifications
7
Audio Troubleshooting Guide
8
Power Supply Circuit
8
Section 2. Audio Part
8
Front Circuit
9
Wiring Diagram
12
Block Diagram
13
Circuit Diagrams
14
Smps(Power) Circuit Diagram
14
Power Interface Circuit Diagram
15
Μ-COM(MAIN) CIRCUIT DIAGRAM
16
Servo Circuit Diagram
17
I/O Circuit Diagram
18
MIC Circuit Diagram
19
Usb Circuit Diagram
20
MIC & Usb Circuit Diagram
21
Hdmi Circuit Diagram(Optional Part)
22
Front Circuit Diagram
23
Main P.C. Board Diagram ( Top View )
24
Printed Circuit Board Diagrams
24
Main P.C. Board Diagram ( Bottom View )
25
Smps P.C. Board
26
Bottom View
27
Key P.C. Board
27
Timer P.C. Board
27
Top View
27
Electrical Troubleshooting Guide
28
Power on
28
Section 3. DVD & Amp Part
28
Test & Debug Flow
29
AUDIO Μ-COM Circuit(DVD & AMP)
35
Opt.
35
Details and Waveforms on System Test and Debugging
36
ES8381 Main Clock Is at 27Mhz(X501)
36
ES8381 Reset Is High Active
36
SYSTEM 27Mhz CLOCK,RESET,FLASH R/W SIGNAL
36
Flash R/W Enable Signal During Download
37
Sdram Clock
37
Tray Close Waveform
38
Tray Open/Close Signal
38
Tray Open/Close Waveform
38
Sled Control Related Signal (no Disc Condition)
39
Tray Open Waveform
39
Laser Power Control Related Signal(no Disc Condition)
40
Lens Control Related Signal(no Disc Condition)
40
Disc Type Judgement Waveforms
41
Focus on Waveforms
43
Spindle Control Waveforms (no Disc Condition)
44
Tracking Control Related Signal
44
Es6698Fd Video Output Waveforms
45
Full Colorbar Signal(COMPOSIT)
45
Audio L/R
46
Audio Output from Pwm IC
46
Audio Related Signal
47
DVD & Amp Waveforms
48
DVD & Amp Circuit Diagrams
50
Mpeg Circuit Diagram
50
Dsp Circuit Diagram
51
Amp Circuit Diagram
52
Dsp P.C. Board Diagram
53
Amp P.C. Board Diagram
54
Cabinet and Main Frame Section
55
Section 4. Exploded Views
55
Deck Mechanism Exploded View
56
Packing Accessory Section
58
Speaker Section
59
Lhs-76Sb
59
Center Speaker
59
Front/Rear Speaker(Lhs-76Sbs)
60
Passive Subwoofer Speaker(Lhs-76Sbw)
61
4
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LG LHS-76SBC Specifications
General
Category
Receiver
Brand
LG
Model
LHS-76SBC
Type
Home Theater System
Channels
5.1
Bluetooth
Yes
USB
Yes
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