LG FFH-185A User Manual

- 1-1 -
CONTENTS
SECTION 1. GENERAL
• SERVICING PRECAUTIONS
.....................................................................................................................
1-2
• ESD PRECAUTIONS
..................................................................................................................................
1-4
• SPECIFICATIONS
......................................................................................................................................
1-5
SECTION 2. ELECTRICAL
• ADJUSTMENTS
..........................................................................................................................................
2-1
• TROUBLESHOOTING
................................................................................................................................
2-3
• WAVEFORMS OF MAJOR CHECK POINT
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2-8
• BLOCK DIAGRAM
......................................................................................................................................
2-9
• SCHEMATIC DIAGRAMS
.........................................................................................................................
2-11
• WIRING DIAGRAM
.....................................................................................................................................
2-19
• PRINTED CIRCUIT DIAGRAMS
...............................................................................................................
2-21
• INTERNAL BLOCK DIAGRAM OF ICs
.....................................................................................................
2-30
SECTION 3. EXPLODED VIEWS
• CABINET AND MAIN FRAME SECTION
..................................................................................................
3-1
• TAPE DECK MECHANISM: AUTO STOP DECK(OPTIONAL)
...................................................................
3-3
• TAPE DECK MECHANISM: AUTO REVERSE DECK
.................................................................................
3-5
• CD MECHANISM
.........................................................................................................................................
3-7
SECTION 4. SPEAKER
..................................................................................................................
4-1
SECTION 5. REPLACEMENT PARTS LIST
..................................................................................
5-1

LG FFH-185A Specifications

General

Brand	LG
Model	FFH-185A
Category	Stereo System
Language	English

Summary

Section 1. General

Servicing Precautions

Notes regarding the correct handling of the pick-up for safe operation.

Notes Regarding Compact Disc Player Repairs

Preparations and notes for handling sensitive CD player components.

ESD Precautions

Techniques to reduce component damage from static electricity.

Section 2. Electrical

Adjustments

Factory alignment and adjustment procedures for the unit.

Tuner Adjustment

Procedure for tuning the FM section.

Troubleshooting

Fails to Initial Read

Troubleshooting steps when the unit fails to read a disc initially.

Waveforms of Major Check Point

HF Signal (RF Signal) Waveform

Waveform characteristics for the RF signal during normal play.

EFM Signal Waveform

Waveform characteristics for the EFM signal during normal play.

Focus Coil Drive Waveform

Waveform for focus coil drive during search and when focus is achieved.

Tracking Coil Drive Waveform

Feed Motor Drive Waveform

Block Diagram

Schematic Diagrams

Main Schematic Diagram

Front/Power Schematic Diagram

Tuner Schematic Diagram

CDP Schematic Diagram

Section 3. Exploded Views

Cabinet and Main Frame Section

Tape Deck Mechanism: Auto Stop Deck(Optional)

Tape Deck Mechanism: Auto Reverse Deck

CD Mechanism

Section 4. Speaker Section

Model: FE-1850E