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Procedures for FM and AM/MW tuning, sensitivity, and separation checks.
Adjustments for tape speed, record frequency, and azimuth.
Exploded diagrams for auto reverse and auto stop cassette deck variants.
Comprehensive exploded view and detailed parts list for the entire unit.
Parts lists for CD deck and speaker assemblies.
Block diagram illustrating the CD player section's circuitry.
Block diagram for the main audio processing and control functions.
Top view layout of the CD part's printed circuit board.
Top and bottom view layouts of the main PCB showing component placement.
Top and bottom view layouts of the control (key) PCB.
Wiring connections for the front PCB.
Wiring connections for the power supply PCB.
Wiring connections for the main control and audio PCB.
Wiring connections for the CD player PCB.
Detailed schematic of the CD player circuit.
Detailed schematic of the main unit's circuit.
Detailed schematic of the control (key) circuit.
Procedures for FM and AM/MW tuning, sensitivity, and separation checks.
Adjustments for tape speed, record frequency, and azimuth.
Exploded diagrams for auto reverse and auto stop cassette deck variants.
Comprehensive exploded view and detailed parts list for the entire unit.
Parts lists for CD deck and speaker assemblies.
Block diagram illustrating the CD player section's circuitry.
Block diagram for the main audio processing and control functions.
Top view layout of the CD part's printed circuit board.
Top and bottom view layouts of the main PCB showing component placement.
Top and bottom view layouts of the control (key) PCB.
Wiring connections for the front PCB.
Wiring connections for the power supply PCB.
Wiring connections for the main control and audio PCB.
Wiring connections for the CD player PCB.
Detailed schematic of the CD player circuit.
Detailed schematic of the main unit's circuit.
Detailed schematic of the control (key) circuit.
The Samsung MM-B3 is a micro component system designed to provide a comprehensive audio experience in a compact form factor. This system integrates multiple audio playback functions, including a CD player, a cassette deck, and a tuner, making it a versatile device for various audio sources. Its design emphasizes user convenience and a range of features for both playback and maintenance.
The core functionality of the MM-B3 revolves around its ability to play back audio from several popular media formats. It features a CD player, allowing users to enjoy their compact disc collection. The integrated cassette deck supports both playback and recording, offering a nostalgic option for tape enthusiasts and the ability to create new recordings. Furthermore, the system includes an AM/FM tuner, enabling reception of radio broadcasts for news, music, and other programming.
For enhanced audio control, the system incorporates an equalizer (EQ) and a Super Bass (S.Bass) function, allowing users to tailor the sound output to their preferences or the specific audio content. A volume control is prominently featured for easy adjustment of the overall sound level. The system also includes a mute function for instant silencing of the audio output.
The tuner section supports both FM and AM (MW) bands, providing access to a wide range of radio stations. It includes features for frequency coverage adjustment, IF adjustment for optimal signal processing, and sensitivity adjustment to ensure clear reception even in areas with weaker signals. For FM stereo broadcasts, a stereo separation check is available, along with a seek stop check to facilitate automatic tuning to strong stations. The AM (MW) section also includes IF adjustment for improved reception quality.
The cassette deck is designed with several operational features to enhance the tape experience. It supports tape speed checks, ensuring accurate playback and recording speeds. An adjust record frequency feature allows for fine-tuning of recording characteristics, which is crucial for maintaining audio fidelity when creating new tapes. The azimuth adjustment feature helps align the tape head for optimal sound quality during playback and recording, minimizing high-frequency loss. Depending on the model, the cassette deck may also include auto-reverse functionality, eliminating the need to manually flip the tape, and an auto-stop mechanism to prevent tape damage at the end of a side.
The system's control interface includes a power on/off button, mode selection buttons for Tuner, CD, Tape, and AUX, and dedicated controls for EQ and S.Bass. A display, likely an LCD, provides visual feedback on the current status, such as selected source, frequency, or track information.
The MM-B3 is designed for straightforward operation. Users can easily switch between different audio sources using the dedicated mode buttons. The volume knob provides intuitive control over the audio output. The EQ and S.Bass functions offer quick ways to customize the sound profile, catering to different music genres or personal tastes.
For the tuner, features like band selection and tuning mode (manual or seek) allow users to navigate radio stations efficiently. The seek stop check ensures that the tuner automatically locks onto clear signals, simplifying the process of finding stations.
The cassette deck's push-eject mechanism makes loading and unloading tapes simple. The counter and reset functions are useful for tracking tape position and quickly returning to a desired point. The repeat function, available for both CD and cassette, allows for continuous playback of a track, album, or tape side. The A-B repeat function provides a convenient way to loop a specific segment of audio.
The system's compact size makes it suitable for various environments, from bedrooms and offices to living spaces where space is at a premium. The inclusion of an AUX input allows for connection of external audio devices, expanding the system's versatility to modern digital players.
The service manual outlines several alignment and adjustment procedures crucial for maintaining the optimal performance of the MM-B3. These procedures are typically performed by service technicians but highlight the device's design for long-term usability and repairability.
For the tuner section, detailed steps are provided for FM IF adjustment, FM frequency coverage adjustment, FM sensitivity adjustment, FM stereo separation check, and FM seek stop check. Similar adjustments are available for the AM (MW) section, including AM (MW) IF adjustment. These ensure that the tuner maintains accurate frequency reception and clear audio output over time.
The cassette deck includes specific maintenance procedures such as tape speed check, adjust record frequency, and azimuth adjustment. These are vital for ensuring that tapes play and record at the correct speed and with optimal sound quality, preventing issues like wow and flutter or muffled audio. The use of standard test tapes like MTT-111N and MTT-5513 indicates a structured approach to calibration.
Exploded views and parts lists are provided for the cassette deck, CD deck, and the overall system, which are invaluable for identifying and replacing components during repair. The electrical parts list details all components, including resistors, capacitors, diodes, transistors, and integrated circuits, along with their specifications and locations on the PCBs. This comprehensive documentation facilitates troubleshooting and component-level repairs.
PCB diagrams for the CD part, main board, and control (key) PCB are included, showing the layout of components and traces. These diagrams are essential for diagnosing electrical faults and guiding component replacement. A wiring diagram illustrates the interconnections between different modules and PCBs within the system, aiding in assembly, disassembly, and tracing signal paths.
The schematic diagrams provide a detailed view of the electronic circuits, enabling technicians to understand the functional blocks and signal flow, which is critical for advanced diagnostics and repairs. The availability of these detailed technical documents underscores the design's consideration for serviceability, allowing the MM-B3 to be maintained and repaired over its lifespan, extending its utility for the user.
General| Brand | Samsung |
|---|---|
| Model | MM-B3 |
| Category | Stereo System |
| Number of Discs | 1 |
| Signal-to-Noise Ratio | 70dB |
| Input Sensitivity | 500mV |
| Playable Media | CD |
| RMS Output Power | 40W |
| Tuner Bands | FM, AM |
| Power Output | 40W |
| Frequency Response | 20Hz - 20kHz |
| Type | Mini |
