This document is a service manual for the Belson® Mobile Video System, specifically model BS-13011. It provides comprehensive information for disassembly, repair, and maintenance of the device.
Function Description
The Belson® Mobile Video System (BS-13011) appears to be a portable multimedia player, likely designed for in-car or mobile entertainment. It integrates a 7-inch Multi-Color TFT Monitor with a DVD player, and includes features for TV reception and external audio/video input. The system is designed to provide video and audio playback from various sources, making it suitable for on-the-go use.
Important Technical Specifications
Based on the block diagram and parts list, the system incorporates several key components:
Display:
- 7-inch Multi-Color TFT Monitor.
DVD System:
- DVD Loader with HPD-40 mechanism.
- Servo control handled by an M5705 chip, supported by a BA5918FP-Y motor driver and BA6289F for eject function.
- Flash ROM (W39F010) and SDRAM (W981616BH-7) for DVD operation.
- MPEG Decoder (ES6008F) for video and audio processing.
- Audio Decoder (WM8728) and Audio SW (PT2313L) for sound management.
- EEPROM (AT24C01) for data storage.
- Crystal oscillator at 27MHz for timing.
TV/Tuner System:
- Tuner (TDQ-6B3) for TV reception.
- Antenna select (AT89C2051) and Antenna Amplifier (UPC1688G).
- Video SW (NJM2235) and OSD (LC74763) for video switching and on-screen display.
Audio System:
- Multiple audio amplifiers: NJM4580M (for general audio and possibly line-out), LM4809 (for headphones), and TDA2822M (for speakers).
- Audio/Video input/output capabilities, including SPDIF output.
Power Supply:
- Designed to operate from AC 110-240V via a DC12V adaptor.
- Internal power supply generates various voltages: +12V, +10VA, +5V, +3.3V, and a fan supply (12V).
- Uses components like KTA1385D, KTC4375, PQ1CZ41H, and MC34063A for power management.
Control System:
- Remote control (PT2222) for user interaction.
- Microcontrollers: AT89S52 (for control) and AT89C2051 (for antenna selection).
- Key Board for local control, with dedicated keys for menu, volume, channel, and DVD functions.
Usage Features
The device offers a range of features for user convenience:
Multimedia Playback:
- Integrated DVD player for disc-based content.
- Mobile Video System implies portability and suitability for vehicle installation.
Display:
- 7-inch TFT monitor provides a visual interface for video content.
Control:
- A comprehensive remote control allows for easy operation of DVD functions (play, pause, stop, skip, fast forward/rewind, repeat, A-B, title, program, goto, zoom, mute, step, P/N, PBC, random, resume, sub, audio, angle, setup, 10+, slow+/-) and system navigation (up, down, left, right, enter, menu, volume, channel).
- On-device key board with buttons for MENU, VOL-, VOL+, MODE, CH-, CH+, and OPEN (for the DVD loader).
- OSD (On-Screen Display) for user feedback and menu navigation.
Connectivity:
- AV/TV Video In for connecting external video sources.
- Audio Out and SPDIF Out for connecting to external audio systems.
- Headphone jack for private listening.
- Antenna input for TV reception.
Maintenance Features
The manual is primarily a guide for service and maintenance personnel, detailing the internal structure and components for repair:
Disassembly Instructions:
- Step-by-step guide for disassembling the unit, including removing the monitor top, bottom, display, antenna, DVD top, DVD core, key board, deck, and main board. This is crucial for accessing internal components for repair or replacement.
- Specific screw types and locations (M4X45, screws A, B, C, D, E) are mentioned to aid in proper disassembly.
Diagrams and Lists:
- Disassembly Diagram: Provides an exploded view of the device, illustrating the location and relationship of major components like the DVD bottom, DVD core, key board, deck, main board, monitor top, monitor bottom, TV board, display, and antenna.
- Block Diagram: Offers a high-level overview of the system's electronic architecture, showing the interconnections between different functional blocks (SERVO PLACE, MPEG PLACE, TR PLACE, KEY BOARD, MONITOR, REMOTE, POWER SUPPLY). This helps in understanding signal flow and troubleshooting.
- Printed Circuit Boards (PCBs): Detailed top and bottom views of the Main Board, Key Board, TV/PT/TB Board, Display Board, and Remote Board. These diagrams are essential for identifying component locations during repair.
- Exploded Views Display and Exploded View Parts Lists Display: These sections (though not fully visible in the provided excerpt) would typically provide detailed diagrams of the display assembly and a corresponding list of its parts, aiding in display-specific repairs.
- Exploded Views Unit and Exploded View Parts Lists Unit: Similar to the display, these sections would cover the overall unit's mechanical components and their respective part numbers, useful for replacing structural or mechanical parts.
- Schematic Diagram: (Not provided in the excerpt, but listed in contents) This would offer detailed circuit diagrams, indispensable for diagnosing electronic faults at the component level.
- Electrical Parts List: (Not provided in the excerpt, but listed in contents) This list would provide part numbers, descriptions, and possibly specifications for all electrical components, facilitating component replacement.
- Specifications: (Not provided in the excerpt, but listed in contents) This section would detail the operational parameters and performance characteristics of the device.
The comprehensive nature of the manual, with its detailed disassembly instructions, block diagrams, and PCB layouts, makes it an invaluable resource for technicians performing diagnostics, repairs, and component replacements on the Belson® Mobile Video System (BS-13011).
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