OSCAR MP3-Player Kit instructions Version B, November 2000 BayCom
Important Note: Ideas, texts, figures and circuits in this manual and design, hard- and software of the OSCAR MP-3 player are copyright protected. Distribution, in whole or parts of it, publication and manufacturing of copies of the OSCAR MP-3 player or the copying or modifying of the manual is prohibted. Licences may be obtained from the copyright holders. All copyrights are held by Alexander Kurpiers, Vladimir Pantelic and Johannes Kneip.
1 Overview The kit allows the construction of OSCAR, a CD-ROM or hard disk based MP3 player. The kit consits of the following components: 1. 2. 3. 4. 5.
2.2 Front PCB The front PCB carries five keys and a rotary encoder. With the help of a variable resistor the contrast of the display can be adjusted. An Infrared Sensor (SFH 536) can be assembled additionally. A suitable remote control is available via BayCom. See OSCAR user manual for a detailed description of the key functions. A circuit diagram of the front PCB is shown on one of the following pages, if you should intend to modify layout or design of the front PCB.
A direct connection to the power supply of a car battery is prohibited, since the voltage may vary significantly. Also here a proper stabilization to 5 and 12V is required. The power supply can be connected either via JP1 or the remaining pins of JP7, see connector layout below. Please not: The PCB does not have a protection against wrong polarity or over voltage. Wrong polarity or overvoltage will result in a fatal damage to the main PCB and the display.
Pin 1 2 3 4 Function A_in R GND GND A_in L JP9: Audio-CD ROM Pin 1 2 3 4 Function +12V GND GND +5V JP5: Power Supply All other connectors on the PCB are used for internal purposes or diagnosis and should not be used.
JP3: Frontplatine JP4 Harddisk-Aktiv Pin1 Pin1 Pin1a JP RS-232 Pin1a JP9: Audio-CD-ROM Pin1 JP7: Audio Out Stromversorgung Pin1 Pin1 JP5: ATAPI-Interface JP1: Stromversorgung
Schematics of Front PCB
Assembly plan for front PCB. The IR sensor is not assembled for the kit.
3 Mounting the kit into a case The OSCAR kit can be mounted into any rack or case. A metal case is recommended. Please be aware of your national security regulations, especially if you plan to use a power supply connected to the mains. For the mounting, please take care of the following recommendations: - 4 Audio ground and power supply ground should not be connected anywhere. An isolated mounting of the line out and head phone connectors is recommended All AF lines should be kept as short as possible.
5 Troubleshooting From our experience, most problems with the kit can be found by doublechecking the wiring and a close examination of all connections and wirings. As a first step, we would ask you to - doublecheck ALL wirings Checking the power supply (please measure the voltage). Are there really +5.0V and +12.0V on the PCB (maximum tolerance 5%). Here is a list of known problems and their origins: No display information, but keyboard works and CD is scanned.
BayCom Service informations Ordering OSCAR or parts All BayCom articles can be ordered via the address provided below. Please ask for actual pricing informations. Order information: 1500 1510 OSCAR-MP3 Player, assembled, incl. remote control OSCAR-MP3 Player, main and front PCB (do-it-yourself-kit) Technical Hotline, Warranty and Repairs: You have a warranty on the function of the kit according to the actual german warranty regulations.
