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LG FH2 Service Manual
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SERVICE MANUAL
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
Internal Use Only
HIGH POWER
SPEAKER SYSTEM
MARCH, 2017
P/NO : AFN77912803
MODEL: FH2
MODEL: FH2
2
Table of Contents
Section 1 Summary
3
Table of Contents
3
Product Safety Servicing Guidelines for Audio Products
4
Servicing Precautions
5
General Servicing Precautions
5
Insulation Checking Prodedure
5
Electrostatically Sensitive (Es) Devices
5
Hidden Key Mode
6
Program Download & Update Guide
7
Specifications
8
Section 2 Cabinet & Main Chassis
10
How to Disassemble the Battery
11
Disassembly & Assembly Instructions
12
Disassembly Guide
12
Assembly Structure and Method
13
Exploded Views
16
Cabinet and Main Frame Section
16
Packing Accessory Section
17
Section 3 Electrical
18
One Point Repair Guide
19
Power Problem
20
Speaker no Sound
23
Portable Function Doesn't Work
24
Bt Function Doesn't Work
25
Electrical Troubleshooting Guide
26
System Power Supply on Smps Board
26
Power
29
Button Operation
30
Bt Operation
31
Audio Output
33
Waveforms of Major Check Point
35
System Part-1 (X-Tal)
35
System Part-2 (I2S Signal)
36
System Part-3 (I2C Signal)
37
System Part-4 (Pwm Signal)
38
System Part-5 (Battery Input - Ac off Status)
39
Wiring Diagram
40
Block Diagrams
41
System Block Diagram
41
Power Block Diagram
42
Circuit Voltage Chart
43
Ics
43
Connectors
43
Printed Circuit Board Diagrams
44
Smps P. C. Board Diagram
44
Main P. C. Board Diagram
46
Front P. C. Board Diagram
47
Fm P. C. Board Diagram
48
Volume Control P. C. Board Diagram
48
MIC P. C. Board Diagram
49
Other manuals for LG FH2
Owner's Manual
21 pages
Simple Manual
4 pages
User Manual
5 pages
5
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LG FH2 Specifications
General
Output Power
50W
Battery Life
Up to 15 hours
Connectivity
Bluetooth, USB, AUX
Power Source
Rechargeable Battery
Type
Portable Speaker
Features
FM Radio
Impedance
4 Ohms
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