Daewoo AGC-2208RDS - User Manual

This document serves as the Service Manual for Daewoo Car Audio models AGC-2208 and AGC-2218 series, including RDS and BASIC variants (AGC-2208RDS, AGC-2208BASIC, AGC-2206RDS, AGC-2206BASIC, AGC-2218RDS, AGC-2218BASIC, AGC-2216RDS, AGC-2216BASIC). It provides comprehensive information for servicing and understanding these car audio systems.

Function Description

The Daewoo Car Audio systems are versatile entertainment units designed for vehicles, offering a range of audio playback and radio reception capabilities. Key functions include:

MP3 CD and CD Player: The units are equipped to play both standard audio CDs and MP3 CDs, providing flexibility in music playback.
Radio Tuner: They feature an electronic tuning system for FM, MW (Medium Wave), and LW (Long Wave) bands, with a substantial memory capability of 42 presets (18 FM, 12 MW, 12 LW). RDS (Radio Data System) functionality is available on specific models, enhancing the radio experience with features like station identification and traffic announcements.
Audio Control: Users have precise control over audio output with electronic volume, bass, treble, balance, and fader adjustments. Additional features like Loudness and Mute control are included for convenience.
Anti-Theft Mechanism: A flip-down detachable faceplate serves as an anti-theft measure, allowing users to remove the front panel when leaving the vehicle.
Multi-Channel Output: The units provide 4-channel high power output (40W x 4Ch), enabling a robust and immersive audio experience within the vehicle.
CD Changer Control (Option): For expanded music libraries, the systems offer control for a 10-CD changer, which is available as an optional accessory.

Important Technical Specifications

The car audio systems boast a set of specifications that define their performance and capabilities:

Audio Section:

Maximum Output Power: 40 watts per channel into 4 ohms.
Load Impedance: 4 ohms or 8 ohms.
Total Harmonic Distortion: Less than 10% at 14 watts.
Frequency Response: 100Hz (± 3dB) to 20kHz (± 3dB).
Control Bass/Treble: 10 ± 3dB at 100Hz/10kHz.

CD Player Section:

Total Harmonic Distortion: 0.1%.
Signal to Noise Ratio: 80dB.
Laser Diode Properties: Material - GaAlAs, Wave length - 775-800 nm, Laser output Power - Less than 400 uW.
Loading Time: 7 seconds ± 3 seconds (standard), with a reliability limit of < 17 seconds.
Ejecting Time: < 5 seconds (standard), with a reliability limit of < 15 seconds.
Access Time: 6 seconds ± 3 seconds (standard), with a reliability limit of < 15 seconds.
Disc Take-up Force: > 120g (standard), > 90g during play in low temp.
Disc Clamping Force: > 130g.
Mechanical Noise: Loading → Eject < 75dB(A), Play < 40dB(A), Access < 70dB(A).
Anti-Vibrational Performance: > 1.0g/10Hz-20Hz (Z way), > 2.0g/30Hz-200Hz (Z way), > 0.6g/10Hz-20Hz (X&Y way), > 1.2g/30Hz-200Hz (X&Y way).
Playability: No sound skipping for interruptions (0.7mm), block dot discs (0.8mm), scratch discs (1mm), and finger print discs (65um).
Disc Deflection: + 0.4mm (no sound skipping).
Disc Eccentricity: + 0.21mm (no sound skipping).
Jitter: < 28 nsec (standard), < 33 nsec (reliability limit).
Frequency Response: 20-20kHz + 2dB (standard), 20-20kHz + 3dB (reliability limit).
Harmonic Distortion: < 0.03% at 1kHz (standard), < 0.05% at 1kHz (reliability limit).
Dynamic Range: > 80dB at 1kHz (standard), > 75dB at 1kHz (reliability limit).
S/N Ratio: > 85dB at 1kHz (standard), > 85dB at 1kHz (reliability limit).
Channel Separation: > 70dB at 1kHz (standard), > 65dB at 1kHz (reliability limit).

Tuner Section:

FM Tuning Range: 87.5 to 108MHz.
FM Sensitivity: 10dBuV.
FM Stereo Separation: 30dB.
FM Signal to Noise Ratio: 60dB.
MW Tuning Range: 522 to 1620KHz (Europe), 530 to 1710kHz (U.S.A).
MW Sensitivity: 22dBuV.
MW Signal to Noise Ratio: 50dB.
MW Channel Space: 9KHz (Europe) or 10KHz (U.S.A).
LW Tuning Range: 144 to 288KHz.
LW Usable Sensitivity: 25dBuV.

General:

Power Requirements: DC 13.8V (10.8-15.6V allowable), Negative ground.
Speaker Impedance: 4 or 8 ohm.
Maximum Output Power: 40W x 4Ch.
Current Consumption: 10A (MAX).
Dimensions (W x H x D): 178 x 50 x 156 mm.
Chassis Size: 195 x 64 x 14.6 mm.
Weight (Net): 1.48Kg.

Usage Features

The Daewoo Car Audio systems are designed with user convenience in mind, incorporating several features for ease of use:

Flip-Down Detachable Face: This feature not only serves as an anti-theft deterrent but also allows for easy access to the CD slot and potentially other controls hidden behind the faceplate.
Electronic Controls: Electronic volume, bass, treble, balance, and fader controls offer precise and smooth adjustments to the audio output, allowing users to tailor the sound to their preferences.
Electronic Tuning: The electronic tuner simplifies station selection and ensures stable reception across all supported bands.
Memory Capability: With 42 station presets, users can quickly access their favorite radio stations without manual tuning.
Local/DX Switch: This switch allows users to optimize radio reception for either strong local signals (Local) or weaker distant signals (DX), improving listening quality in various environments.
Loudness Control: The loudness feature enhances bass and treble at low volume levels, compensating for the human ear's reduced sensitivity to these frequencies.
Mute Control: A dedicated mute function allows for instant silencing of the audio output, useful for quick conversations or when attention is needed elsewhere.
MP3 CD Playback: The ability to play MP3 CDs means users can store hundreds of songs on a single disc, greatly expanding their in-car music options.
RDS Functionality (on RDS models): Provides useful information such as station name, program type, and traffic announcements, enriching the radio listening experience.

Maintenance Features

The service manual provides crucial information for maintaining and troubleshooting the car audio units:

Emergency Trouble Shoot Guide: This section offers a systematic approach to diagnosing common issues, categorized by general function, tuner function, and CD function. It guides technicians through a series of "Yes/No" questions and recommended actions, such as checking connectors, replacing components (e.g., power IC, tuner module, LCD/lamp), and performing basic adjustments.
CD Part Mode & Playability Definitions: Detailed definitions of STOP, LOADING, PLAY, and EJECT modes, along with their statuses, help in understanding the CD mechanism's operation and diagnosing related problems.
Standard Values / Play-ability Test: This section outlines specific performance metrics for the CD player, including loading time, ejecting time, access time, disc take-up force, disc clamping force, mechanical noise, anti-vibrational performance, playability, disc deflection, disc eccentricity, jitter, frequency response, harmonic distortion, dynamic range, S/N ratio, and channel separation. These values serve as benchmarks for evaluating the unit's functionality and identifying deviations during repair.
Parts Location on P.C. Board: Detailed diagrams showing the layout of components on both the main PCB and front PCB (for AGC-2208 and AGC-2218 series) are provided for both part side and bottom side views. These diagrams are essential for locating specific components during inspection, repair, or replacement.
Electrical Parts List: Comprehensive lists of electrical components, including their location, part name, part code, quantity, unit, and description, are provided for the main PCB, front detail assembly, PCB ISO assembly, escutcheon assembly, deck assembly, and packing assembly. This list is critical for ordering replacement parts and ensuring compatibility.
Function of MICOM IC (uPD178016GC): A pin configuration diagram and description of the main microcontroller (MICOM IC) are included. This information is valuable for advanced troubleshooting and understanding the core logic of the device.
IC Block Diagram: Provides a high-level overview of the internal structure and interconnections of integrated circuits within the system, aiding in understanding signal flow and identifying faulty ICs.
Liquid Crystal Display (LCD) Information: Details related to the LCD are provided, which is useful for diagnosing display issues.
Output Connection Descriptions: Information on how various outputs are connected, which is essential for proper installation and troubleshooting of external connections.
Caution for Essential Stock Parts: Highlights specific components (marked with 'R') that are recommended for essential stock, indicating their importance for common repairs and ensuring timely service.

Overall, this service manual is an indispensable resource for technicians, providing the necessary information to effectively diagnose, repair, and maintain the Daewoo Car Audio AGC-2208 and AGC-2218 series units.

Daewoo AGC-2208RDS Specifications

General

Brand	Daewoo
Model	AGC-2208RDS
Category	Car Stereo System
Language	English

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Daewoo AGC-2208RDS - User Manual

Table of Contents

Summary

1. Product Specifications

Audio Section Specifications

CD Player Section Specifications

Tuner Section Specifications

General Product Specifications

2. Line Drawings and Diagrams

Front Panel Line Drawing

Rear Panel Line Drawing

3. Emergency Troubleshooting Guide

General Function Troubleshooting

Tuner Function Troubleshooting

CD Function Troubleshooting

4. CD Player Specifications and Tests

CDP Mechanical Modes

CD Playability Test Standards

6. PCB Component Locations

Main PCB Component Layout (Part Side)

Main PCB Component Layout (Bottom Side)

Front PCB Component Layout (AGC-2208, Part Side)

Front PCB Component Layout (AGC-2208, Bottom Side)

Front PCB Component Layout (AGC-2218, Part Side)

Front PCB Component Layout (AGC-2218, Bottom Side)

9. Electrical Parts Lists

Main PCB Electrical Parts List

Front Assembly Electrical Parts List (AGC-2208)

Front Assembly Electrical Parts List (AGC-2208 Cont.)

Front Assembly Electrical Parts List (AGC-2218)

Front Assembly Electrical Parts List (AGC-2218 Cont.)

ISO PCB Assembly Parts List

Escutcheon Assembly Parts List

Deck Mechanism Parts List

Packing Assembly Parts List

10. Micom IC Functions

Micom IC Pin Configuration (Top View)