The provided document is a service manual for the AIWA HS-RX308 and HS-RX408 models, which are described as "STEREO RADIO CASSETTE PLAYER" devices. This specific manual is a "CORRECTION DATA" update, indicating it addresses errors found in a previous service manual (S/M Code No. 09-002-425-5R1). The current manual's code is 09-003-425-5C1.
The device is a portable stereo radio cassette player, designed for personal audio playback. Its primary functions include playing audio cassettes and receiving radio broadcasts.
Function Description:
The AIWA HS-RX308 and HS-RX408 are equipped with both a cassette player and an AM/FM stereo radio tuner. The front panel of the device, as depicted in the diagram, features controls for both tape and radio operations.
Cassette Player Features:
- Tape Transport Controls: Standard controls such as "REW" (Rewind), "PLAY" (indicated by a triangle symbol), and "FF" (Fast Forward) are present. The "OPEN" button suggests a mechanism to open the cassette compartment.
- Full Remote Control: The device is explicitly stated to have "FULL REMOTE CONTROL" capability, implying that many, if not all, of its functions can be operated via a remote control unit (though the remote itself is not detailed in this excerpt).
- Basic Tape Mechanism: The manual specifies the "BASIC TAPE MECHANISM" as "CL-850-5 SIL," indicating a particular internal tape drive system used in these models. This mechanism is further detailed in the "TAPE MECHANISM EXPLODED VIEW" and "TAPE MECHANISM PARTS LIST" sections, showing components like the main belt, sub belt, various gears (reel gear, clutch gear, FWD gear, FF gear), pinch rollers, and the head assembly. The presence of "REV ARM" and "REV SELECT" parts suggests a reverse playback function, allowing the cassette to play both sides without physically flipping it.
Radio Features:
- AM/FM Stereo: The device supports both AM and FM radio bands, with stereo reception for FM.
- Tuning Controls: "TUNING UP" and "TUNING DOWN" buttons are available for manual station selection.
- Preset Stations: A "PRESET" function is included, allowing users to store and recall favorite radio stations. The "PRESET STATION" button, along with "PRESET UP" and "PRESET DOWN" controls, facilitates this feature. The "30" next to "PRESET" might indicate the number of stations that can be stored (e.g., 30 presets).
- Radio On/Off: Dedicated "RADIO ON" and "RADIO OFF" buttons are provided for controlling the radio function separately from the cassette player.
- Mode/Set/Phrase: A "MODE/SET/PHRASE" button suggests additional radio functionalities, possibly for setting alarm times, timer functions, or specific playback modes.
General Features:
- Hold Function: A "HOLD" switch is present, which typically locks the controls to prevent accidental operation, especially useful for portable devices.
- Power/Battery: An "OPE/BATT" indicator or button is visible, likely related to operation status and battery level.
- Reset Function: A "RESET" button is included, which can be used to restore the device to its default settings.
- Power Source: While not explicitly stated, the "OPE/BATT" indicator and the portable nature of the device strongly suggest it operates on batteries, in addition to potentially an AC adapter (not shown).
Important Technical Specifications (Derived from Parts List):
The parts list provides insight into the internal components, which indirectly reflects technical specifications:
- Motor: The device uses a "MOTOR (IBIGB02)," which is the primary motor for the tape transport mechanism.
- Head Assembly: The "HEAD ASSY (PH8ZM-3)" is specified, indicating the type of magnetic head used for reading/writing (though typically only reading for a player) on the cassette tape.
- Belts: It utilizes a "MAIN BELT" and a "SUB BELT" for power transmission within the tape mechanism.
- Screws: Various screws are listed, including "SCREW 1.7-5.5" and "SCREW 1.7-2.5," indicating the precise fasteners used in assembly.
Usage Features:
- Portability: The compact design and the "HOLD" function suggest the device is intended for on-the-go use.
- Ease of Use: The clearly labeled buttons for tape and radio functions, along with preset capabilities, aim for user-friendly operation.
- Versatile Audio Source: The combination of a cassette player and an AM/FM radio offers multiple options for audio entertainment.
- Remote Control: The "FULL REMOTE CONTROL" feature enhances convenience, allowing operation from a distance.
Maintenance Features (Derived from Service Manual Content):
As a service manual, its primary purpose is to facilitate maintenance and repair.
- Exploded View Diagram: The "TAPE MECHANISM EXPLODED VIEW 1/1" provides a detailed visual breakdown of all internal components of the tape mechanism, showing their relative positions and assembly order. This is crucial for disassembling and reassembling the device correctly during repairs.
- Parts List: The "TAPE MECHANISM PARTS LIST 1/1" enumerates every component of the tape mechanism with its part number ("PART NO."), internal kanri number ("KANRI NO."), and a brief description ("DESCRIPTION"). This allows technicians to identify and order specific replacement parts.
- Correction Data: The fact that this is a "CORRECTION DATA" manual highlights the importance of accurate documentation for service. It ensures that technicians have the most up-to-date information for troubleshooting and repair, preventing errors that might have been present in previous versions of the manual. This implies that AIWA provides ongoing support and updates for its service personnel.
- Component Identification: Descriptions like "FRAME CENTER," "GEAR SHAFT," "REEL GEAR T," "CLUTCH GEAR," "FELT," "PINCH ROLLER," and "HEAD BASE" allow for precise identification of parts that might need cleaning, lubrication, or replacement due to wear and tear. For example, belts (MAIN BELT, SUB BELT) are common wear items in cassette players and are clearly listed for easy replacement.
- Assembly Guidance: The exploded view, combined with the parts list, serves as a guide for proper assembly and disassembly procedures, ensuring that the device can be serviced effectively without causing further damage.
In summary, the AIWA HS-RX308 and HS-RX408 are robust, portable stereo radio cassette players designed for personal use, featuring comprehensive controls for both tape playback and radio reception, with an emphasis on maintainability through detailed service documentation.
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