Related Manuals for Oakley Sound Rack Power Supply Unit (RPSU)
Summary of Contents for Oakley Sound Rack Power Supply Unit (RPSU)
- Page 1 Oakley Sound Systems Rack Power Supply Unit (RPSU) PCB Issue 1 User Manual V1.0.1 Tony Allgood Oakley Sound Systems CARLISLE United Kingdom...
- Page 2 Introduction This is the User Manual for issue 1 of the RPSU circuit board from Oakley Sound. The Oakley RPSU is a power supply unit designed to be used in conjunction with the Oakley rack projects like the HVM and SE330. However, it may also be used with a Dizzy module as part of a larger DIY project.
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Page 3: Safety Warning
AC output mains adapters. Oakley Sound Systems are not liable for any damages caused by the misuse of this product. It is your responsibility to use this product safely. If you have any doubt about installing a safe... - Page 4 The Oakley RPSU module This power supply board will allow the conversion of a suitable low voltage alternating current (AC) to be rectified, smoothed and regulated. The module is designed to be fitted to a suitably large metal panel which functions as a heatsink for the two regulator devices attached to the RPSU circuit board.
- Page 5 Some linelumps, like the Yamaha PA-20 and PA-30, use a split AC output or a centre tapped AC output. This means it has three wires coming from it and will use a different plug from the usual round barrel one you see on the single phase AC wallwarts. With a split AC output the Oakley RPSU should be wired to work in full wave rectification mode.
- Page 6 The Power Supply to the Power Supply The standard method of powering the unit is from a low voltage tapped AC source. The safest available option is to use a ready made 'wallwart' or ‘line lump’ supply. You can use any 15V or 18V AC output wallwart of linelump you can source. The current capability of the mains adapter, sometimes incorrectly called the 'ampage', will determine the maximum current draw of your PSU.
- Page 7 Yamaha PA-20 This is a linelump supply and features a fixed 17.5-0-17.5 volt AC output at 0.94A maximum. This means it gives us two AC outputs with a centre tap or mid point reference voltage. So unlike the single phase AC adapter output with two leads, this one has three. This means you need to use the Oakley RPSU in full wave rectification mode.
- Page 8 Linelumps and Wallwarts: Wiring Diagrams Input wiring will depend on the type of wallwart or linelump you will be using. Standard AC output wallwart Single phase, two wire, wallwarts or linelumps need to use half wave rectification so the Oakley PSU can generate both positive and negative supplies simultaneously. They only need the terminal's AC1 and 0V2 wired to the power socket.
- Page 9 Centre tapped wallwarts and linelumps Centre tapped linelumps like the Yamaha PA-20 will have three wires coming from their connector. It will have two AC outputs and one 0V. Take one of the AC outputs to terminal AC1 and the other AC output to terminal AC2. It should not matter which AC output goes to AC1 or AC2.
- Page 10 Using an Internal Mains transformer Be afraid, be very afraid... Some of you old hands will laugh about the level of hysteria that surrounds direct mains connection to DIY projects. However, this fear is more to do with our litigious society than the real danger to the builder.
- Page 11 3. The heatsink will need to dissipate even more energy because of the greater voltage drop across the regulators. In the wiring diagram shown I have included a suggested wiring method for connecting up a mains transformer. Not all mains transformers are the same, some have additional windings, others have tapped windings.
- Page 12 Mains wiring diagram. For experienced builders only!
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Page 13: Final Comments
Final Comments I hope you that the Oakley RPSU lives up to your expectations and provides you with a reliable source of power for your project. If you have any questions about the module, an excellent source of support is the Oakley Sound Forum at Muffwiggler.com.
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