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This document describes the CMT-M70/M70K Micro Hi-Fi Component System and its accompanying SS-CM70 Speaker System. The CMT-M70/M70K is a compact audio system designed for home use, offering a range of playback and recording functionalities. The SS-CM70 is a two-way, bass reflex speaker system specifically designed to complement the CMT-M70/M70K.
The CMT-M70/M70K system serves as a versatile audio hub, integrating a compact disc player, a tape deck, and a tuner. It is designed to provide comprehensive audio entertainment and recording capabilities within a small footprint.
CD Playback: The system features a compact disc deck (CDM55F-K6BD41A) that supports standard audio CDs. It includes functionalities for playing, pausing, stopping, and track navigation. The CD mechanism is designed for reliable disc handling and playback.
Tape Playback and Recording: A mechanical tape deck is integrated, allowing for playback of cassette tapes. It also supports recording, enabling users to create their own cassette recordings, potentially from the CD player or the tuner. The tape deck includes controls for play, stop, fast forward, rewind, and record.
Tuner Functionality: The system incorporates a tuner for receiving radio broadcasts. It supports both FM and AM bands, with specific frequency ranges varying by model (e.g., US, Canadian, AEP, UK, E, Australian, Singapore, Mexican, Thai, Korean models). The tuner allows for station selection and preset storage.
Speaker System (SS-CM70): The SS-CM70 is a dedicated speaker system for the CMT-M70/M70K. It is a two-way, bass reflex design, meaning it utilizes a woofer and a tweeter to reproduce a full range of audio frequencies, with a port to enhance bass response. The speakers are designed to deliver clear and balanced sound output for the component system.
Remote Control: The system is operable via a remote control, providing convenient access to all functions from a distance. This includes power on/off, source selection (CD, Tape, Tuner), volume control, and playback/recording operations.
Display: An LCD display panel provides visual feedback on the system's status, such as current source, track number, radio frequency, and time.
CMT-M70/M70K Component System:
SS-CM70 Speaker System:
Multi-Source Playback: Users can enjoy audio from various sources including CDs, cassette tapes, and FM/AM radio broadcasts. This versatility makes it suitable for different media collections.
Recording Capability: The integrated tape deck allows for recording from the CD player or tuner onto cassette tapes, offering a way to preserve or transfer audio content.
Remote Control Operation: The included remote control enhances user convenience, allowing for easy control of all system functions without needing to be near the unit.
Compact Design: The "Micro Hi-Fi" designation highlights its compact size, making it suitable for placement in smaller spaces such as bedrooms, offices, or kitchens.
Model Variations: The system is available in different models (US, Canadian, AEP, UK, E, Australian, Singapore, Mexican, Thai, Korean) to cater to regional power requirements and tuner frequency standards.
Safety Critical Components: The manual explicitly identifies components marked with a triangle (▲) or a dotted line with a triangle (△) as critical for safety. These components must be replaced only with specified part numbers to ensure continued safe operation. This is a crucial safety feature for technicians performing repairs.
Disassembly Flow: The service manual provides a detailed disassembly flow, outlining the step-by-step process for disassembling various sections of the unit, such as the panel (side), top panel, mechanical deck (tape), front panel, back panel, main board, CD mechanism deck, base unit, and loading board. This systematic approach aids technicians in efficient and correct servicing.
Exploded Views: Detailed exploded views with part numbers are provided for key sections like the panel (side), front panel, chassis, CD mechanism deck, and base unit. These diagrams are essential for identifying and ordering correct replacement parts.
Printed Wiring Boards and Schematic Diagrams: The manual includes comprehensive printed wiring board layouts and schematic diagrams for the CD board, TC board, main board, control/loading/video boards, switch board, and power board. These resources are invaluable for troubleshooting, component identification, and circuit analysis during repair.
Semiconductor Locations: Specific semiconductor locations are listed for various boards, aiding in the precise identification of integrated circuits (ICs), transistors, and diodes.
Waveforms and Voltages: Waveform diagrams and voltage readings at various test points are provided for different operational modes (e.g., CD Play Mode, REC Mode, Tuner/FM/AM). This information is critical for diagnosing circuit malfunctions and verifying correct operation.
Revision History: A revision history log is included, detailing updates and changes to the service manual. This ensures that technicians are working with the most current and accurate information.
Component Identification: The manual provides extensive lists of components, including resistors, capacitors, coils, diodes, ICs, transistors, connectors, and switches, along with their part numbers, descriptions, and specifications. This facilitates accurate part replacement.
Self-Check Mode: The system includes a self-check mode that allows for testing various functions such as the cold reset, liquid crystal display, tape deck check, and change-over MD/Video. This diagnostic feature helps in quickly identifying operational issues.
Test Mode: A test mode is available for electrical adjustments and focus bias checks, providing specific procedures and expected waveforms for calibration and verification.
Note on Printed Wiring Boards: Specific notes are provided regarding the identification of components on the printed wiring boards, including the component side, conductor side, internal components, and indicator transistors.
Note on Schematic Diagram: Guidelines for interpreting schematic diagrams are given, including voltage and resistance measurements, waveforms, signal paths, and abbreviations for different models.
Note on Safety: Recurring warnings about safety-critical components emphasize the importance of using genuine and specified replacement parts to maintain product safety.
General| Brand | Sony |
|---|---|
| Model | SS-CM70 |
| Category | Stereo System |
| Language | English |
