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RH4820W
LG RH4820W Manuals
Manuals and User Guides for LG RH4820W. We have
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LG RH4820W manual available for free PDF download: Service Manual
LG RH4820W Service Manual (150 pages)
HDD/DVD RECORDER
Brand:
LG
| Category:
DVD Recorder
| Size: 16.58 MB
Table of Contents
Section 1 Summary
3
Table of Contents
3
New Functions of Hdd/DVD-Recorder
4
Product Safety Servicing Guidelines for Video Products
5
Servicing Precautions
6
General Servicing Precautions
6
Insulation Checking Prodedure
6
Electrostatically Sensitive Devices
6
Service Information for Eeprom IC Setting
7
Specifications
8
Section 2 Cabinet & Main Chassis
9
Exploded Views
10
Cabinet and Main Frame Section
10
Deck Mechanism Section(RL-01A)
11
Packing Accessory Section
12
Section 3 Electrical
13
Electrical Troubleshooting Guide
14
Power ( Smps ) Circuit (Part 1)
14
Power ( Smps ) Circuit (Part 2)
15
System Circuit
16
Disc Not Recognized
16
When Playing Disc ,No Audio Output
17
No Optical / Digital Output
17
No Tuner Audio Output
18
No External Input 1 Audio
20
No External Input 2 Audio
21
No External Input 3 Audio
22
No External Input 4 Audio
22
No Rgb/ Component Video Signal When Playing Disc
23
No Composite/S-Video Signal When Playing Disc
24
No Tv , External Input Video Signal
25
No DV( Ieee 1394 ) Input (Video/Audio) Signal
26
Hdr Part
14
Section
14
Block Diagrams
27
Overall Block Diagram
27
In/Out Block Diagram
28
Video Block Diagram
29
Video Sw Path Block Diagram
30
Audio Block Diagram
31
Audio Sw Path Block Diagram
32
FLD / Μ-COM BLOCK DIAGRAM
33
Power : Main Board Block Diagram
34
Power : I/O Board Block Diagram
35
Layout Connection Block Diagram
36
Smps Block Diagram (Part 1)
37
Smps Block Diagram (Part 2)
38
Circuit Diagrams
39
Power Circuit Diagram
39
E5 Bga, Power, Uart2 Circuit Diagram
40
Ddr Sdram, Flash Circuit Diagram
41
Rst, Control/Status Reg, Atapi, Host Cpld, Latch Circuit Diagram
42
4, Ethernet Connector Circuit Diagram
43
Video In/Out Circuit Diagram
44
Audio In/Out Circuit Diagram
45
I/O Micom Circuit Diagram
46
Tuner, Video In/Out Circuit Diagram
47
Front Circuit Diagram
48
Onspec 3 in 1 Memory Card & DV Avin Circuit Diagram
49
Waveforms
50
Circuit Voltage Chart
51
Printed Circuit Diagrams
54
Main P.C.board(Top Side)
54
Main P.C.board(Bottom Side)
55
I/O P.C.board
56
Jack P.C.board
56
Front P.C.board
57
Key P.C.board
57
Power P.C.board
58
Electrical Troubleshooting Guide
59
Rl-01A Loader Part
59
Block Diagrams & Description
73
Overall Block Diagram
73
Major IC Internal Block Diagram and Pin Description
74
Block Diagram
75
Major IC Internal Block Diagram and Pin Description
79
Ic302(Upd76F0047):Micom
88
Waveforms
92
Power & Reset Signal
92
Main Clock1 for Ic202 (16.9Mhz)
92
Main Clock2 for Ic302 (20Mhz)
93
Sdram Clock
93
Tray Open/Close Signal 1
94
Tray Open/Close Signal 2
94
Sled Move Signal 1
95
Sled Move Signal 2
95
Focus Search Signal
96
Laser Turn on Signal
96
Disc Type Judgement Waveform (CD Series)
97
Disc Type Judgement Waveform (CD&CD-R)
97
Disc Type Judgement Waveform (CD-Rw)
98
Disc Type Judgement Waveform (DVD Series)
98
Disc Type Judgement Waveform (Dvd_Single&R)
99
Disc Type Judgement Waveform (DVD
99
Disc Type Judgement Waveform (Dvdrw)
100
Spindle Waveform1
100
Spindle Waveform2
101
Focus on Signal(CD)
101
Focus on Signal(DVD)
102
Focus on Signal (DVD)
103
Track off Signal(CD)
103
Track off Signal(DVD)
104
Tilt Driver Signal(Disc Reading)
104
Rf Waveform(DVD)
105
Rf Waveform(CD)
105
Wobble(DVD-R/Rw)_Reading
106
Wobble(DVD+R/Rw)_Reading&Writing =>X1 Speed
106
Ld Enable(DVD)
107
Ld Enable(CD)
107
Laser Power(Reading)_Dvd+Rw
108
Laser Power(Erase)_Dvd+Rw
108
Laser Power(Writing)_Initial State
109
Laser Power(Writing)_Processing
109
Circuit Diagrams
111
Rf Circuit Diagram
111
Dsp Circuit Diagram
112
Μ-COM CIRCUIT DIAGRAM
113
Printed Circuit Diagrams
114
Main P.C.board(Top Side)
114
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