Philips AZ3067 - User Manual

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Overview

Function Description
Important Technical Specifications
Usage Features
Maintenance Features

This document is a service manual for the Philips AZ3067 CD Soundmachine, providing comprehensive technical information for maintenance and repair.

Function Description

The Philips AZ3067 CD Soundmachine is a portable audio device designed for playing various audio sources. Its primary functions include:

CD Playback: Supports standard audio CDs and MP3-CDs, indicated by "MP3-CD PLAYBACK" and "CLASS 1 LASER PRODUCT" markings. The device features a CD servo mechanism (DA12B3) and a DSP + MP3 decoder (D16078PGE) for digital audio processing.
Cassette Playback and Recording: Equipped with a cassette deck (TK20FX-V690-001) for playing and recording audio cassettes. This functionality is supported by a REC/PB pre-amplifier (AN7323) and an erase head.
Radio Reception: Includes an integrated FM/AM tuner (TEA5757) for receiving radio broadcasts. It features both an FM antenna and an AM frame aerial.
Auxiliary Input: An AUX jack allows connection of external audio devices, expanding its versatility.
Audio Output: Features a power amplifier (TA8227P) driving two speakers, and a headphone jack for private listening.
Volume and Tone Control: Incorporates a volume encoder and a VOL & DBB (Dynamic Bass Boost) controller for adjusting audio output.

Important Technical Specifications

The service manual provides detailed circuit diagrams and parts lists that reveal key technical specifications:

Audio Processing:

Digital Signal Processing: Utilizes a DSP + MP3 decoder (D16078PGE) for CD audio and MP3 decoding.
CD Servo Control: Managed by an SAA7325 RF AMP & DSP and an LM358M LD control.
Motor Driver: Employs TDA7073A ICs for motor control in the CD mechanism.
Pre-amplification: An AN7323 IC serves as the REC/PB pre-amplifier for the cassette deck.
Power Amplification: A TA8227P IC is used for the power amplifier stage, driving the speakers.
Analog Multiplexing: An Analog Multiplexer 4052 is used for routing audio signals from various sources.
Operational Amplifier: A TDA1308T OP AMP is present in the audio path.

Control and Memory:

Microcontroller (MCU): The central control unit is a TMP86CS25F MCU, responsible for managing all device functions, including display, key input, and source selection.
EEPROM: Two EEPROMs are identified: a 24C64 for general data storage and a 24C02, likely for specific settings or configurations.
LCD Display: The device features an LCD for displaying operational information.

Power Supply:

Transformer: An EI48 120/230V transformer (part no. 9940 000 01387) indicates dual voltage compatibility, allowing operation from different mains power supplies.
Power Cord: A 5 FEET VDE POWER CORD (part no. 9940 000 00161) is specified.
Battery Operation: The block diagram shows a "9V BATTERY" input, confirming portable operation. The rectifier board diagram includes a 9V battery connection.

Mechanical Components:

CD Mechanism: Uses a DA12B3 CD mechanism (part no. 9940 000 01385).
Cassette Deck: Features a TK20FX-V690-001 cassette deck (part no. 9940 000 00165).
Antenna: Includes a ROD ANTENNA NC-2433 2 SEC (part no. 9940 000 00167) for radio reception.
Battery Door: A BATTERY DOOR AZ3067 (part no. 9940 000 01383) is listed.

Connectivity:

Remote Control: The presence of an "IR & KEY" module and a "REMOTE CONTROL AZ3067" (part no. 9940 000 01384) indicates remote control capability.
Auxiliary Input: An AUX JACK is provided for external audio sources.

Usage Features

Based on the block diagram and circuit descriptions, the AZ3067 offers several user-friendly features:

Multi-source Playback: Users can switch between CD, cassette, FM/AM radio, and auxiliary input sources.
MP3-CD Playback: The ability to play MP3-CDs allows for extended music playback from a single disc.
Cassette Recording: The cassette deck supports recording, likely from the radio or CD player, or potentially from the auxiliary input.
Dynamic Bass Boost (DBB): A dedicated DBB controller suggests an enhanced bass feature for richer audio experience.
Volume Control: A rotary volume encoder provides intuitive volume adjustment.
LCD Display: The LCD offers visual feedback on current mode, track information, or radio frequency.
Remote Control: The included remote control enhances convenience, allowing operation from a distance.
Portable Operation: The option for 9V battery power makes the device portable for use without a mains connection.
Headphone Output: A headphone jack enables private listening.

Maintenance Features

The service manual itself is a comprehensive tool for maintenance and repair, providing:

Detailed Circuit Diagrams: Separate diagrams for Volume & EQ, Power Amplifier, Power Supply, CD Servo, MCU & Display, Keyboard, Rectifier, Tape, and Tuner parts facilitate fault diagnosis at the component level.
PCB Layout Diagrams: Layouts for Audio, CD Servo, MCU and Key, and Tuner & Rectifier boards aid in locating components and tracing connections on the physical circuit boards.
Block Diagram: Provides an overview of the system architecture and interconnections between major functional blocks, useful for high-level troubleshooting.
Wiring Diagram: Shows the physical wiring connections between different PCBs and external components, crucial for reassembly and identifying wiring faults.
Service Parts List: A comprehensive list of replaceable components with their part numbers, essential for ordering spare parts. This includes specific mechanical parts like the CD mechanism, cassette deck, and antenna, as well as the transformer and battery door.
Version Information: "Version 1.0" and "Published by YM 0518 Service Audio Subject to modification" indicate that the manual is a controlled document, potentially subject to updates, which is important for ensuring technicians use the most current information.
Copyright and Reproduction Notice: Highlights the proprietary nature of the information, emphasizing that it is intended for authorized service personnel.

This manual is an indispensable resource for technicians to effectively diagnose, repair, and maintain the Philips AZ3067 CD Soundmachine, ensuring its continued functionality and performance.