Summary of Contents for FiveFish Audio PSU-2448Plus+
- Page 1 FiveFish Studios PSU-2448Plus+ Assembly Guide Copyright © 2015-2017 FiveFish Audio...
- Page 2 No part of this document may be reproduced, either mechanically or electronically, posted online on the Internet, in whole or in part, without the expressed, written permission of FiveFish Audio. This document is solely provided to the kit builder of the PSU-2448Plus+ Power Supply Kit.
- Page 3 FiveFish FiveFish Audio www.fivefishaudio.com Studios Dear Customer, Thank you for purchasing our PSU-2448Plus+ Power Supply Kit. Great care has been taken to make this assembly guide complete and as accurate as possible. Our goal is to make your assembly work easy and trouble-free, and deliver to you a working, reliable, and high-performance power supply.
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Page 4: Safety Considerations
VA rating. Do not use repaired fuses equipment, electronic component or personal injury. or short-circuit the fuseholder with a wire to bypass the fuse. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio... -
Page 5: General Information
All voltage rails feature built-in current-limiting and short circuit protection provided by the 3-terminal regulator devices. The V+, V- and +48V voltage rails are additionally protected by in-line fuses against any accidental power supply short-circuit or overload/overcurrent condition. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio... - Page 6 DO NOT CONNECT THE PSU-2448PLUS+ KIT DIRECTLY TO AC MAIN LINES The instructions on this page are for the FiveFish Audio PWR-TRAFO kit. If you are using a different power transformer brand or model/part#, please consult your power transformer’s manufacturer’s documentation.
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Page 7: Tools And Equipment Required
2.5. Magnifier & Lamp - I recommend a clean and well-lighted space for your assembly area. 2.6. Other Tools (not required, but nice to have) - Component lead bender, vise, tweezers, wire stripper. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio... -
Page 8: Assembly Guide
TIP: Solder smallest/shortest components first before the larger/taller components to make assembly work easier. 3.1 Solder all resistors and diodes. Insert diodes in the correct orientation. Align the white band of diode with silkscreen on the PCB. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio... - Page 9 3.2 Solder all ceramic capacitors. These are the small yellow components. 3.3 Solder Bridge Rectifiers. The Bridge Rectifiers may be damaged if you apply too much heat for a long period of time. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio...
- Page 10 LEDs, like diodes, have polarity and must be inserted in the proper orientation. See additional photos below for correct orientation. Mount the LEDs as low as possible on the PCB so it wouldn’t interfere when the fuses are installed. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio...
- Page 11 (+) positive. Insert the capacitors to the PCB following the correct polarity. NOTE: All capacitors in the PSU kit are oriented in the same direction. 3.5 Solder all small electrolytic capacitors. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio...
- Page 12 3.6 Solder all trimmer resistors. Trimmer resistors are used to adjust the final output voltages of the Power Supply Unit. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio...
- Page 13 PSU kit are oriented in the same direction. 3.7 Solder all medium-sized electrolytic capacitors, then all large-sized electrolytic capacitors. NOTE: The 1000uf/80V capacitors are twist-in type. Push them into the board with a rotating motion. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio...
- Page 14 DO NOT INTERCHANGE THE POSITION OF THE VOLTAGE REGULATORS OR YOU MAY DAMAGE THEM. 3.8 Solder the voltage regulators. The flat-side/metal-side of the voltage regulator should be facing towards the edge of the PCB. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio...
- Page 15 MICA or SIL-PAD insulators and check that the regulator tab is electrically isolated from your aluminum or metal heatsink. Failure to electrically isolate the metal tab from your common heatsink will result in a short-circuit and damage to your voltage regulators. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio...
- Page 16 “open” before any permanent damage is done to the voltage regulators. While the regulators have built-in short-circuit protection, we think the fuses offer additional protection and will be much more convenient for the end-user to replace than a damage voltage regulator. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio...
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Page 17: Wiring Guide
AC voltages and there is no polarity. The PSU kit uses standard 0.1” pitch pads for all input and output connections. You can use standard 0.1” Molex headers to make connections. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio... - Page 18 + 5V -- 7805 Voltage Regulator in IC4 location +12V -- 7812 Voltage Regulator in IC4 location +15V -- 7815 Voltage Regulator in IC4 location +18V -- 7818 Voltage Regulator in IC4 location PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio...
- Page 19 LED headers if you need more/less current for your chosen LED indicator. The supply voltage is 48V. Compute for the appropriate value of R using the formula R = V x I ; where I is the current required for LED illumination. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio...
- Page 20 220Volts. These voltages can seriously injure or kill and I strongly suggest following all safety precautions. AC INPUT VIOLET FUSE HOLDER BLUE SAFETY GROUND GRAY BROWN POWER SWITCH POWER TRANSFORMER 110 VOLT WIRING GUIDE For 220V Wiring Guide, refer to page 6 of this assembly guide. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio...
- Page 21 Connect multimeter (+) probe lead to DC1-pad4 (labeled V-). Connect multimeter (-) probe lead to DC1-pad3 (labeled GND). Adjust R7 trimmer for your desired output voltage. Note: Polarity will be reversed and you will get a negative voltage reading. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio...
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Page 22: Troubleshooting Guide
Check C6 and C7 capacitor. Check if RECT1 Bridge Rectifier is working by checking for presence of DC volts across capacitor C1. If there is DC voltage across C1, but no output voltage, then IC1 voltage regulator is damaged/open. Replace IC1 with LM317HVT. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio... - Page 23 This page intentionally left blank. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio...
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Page 24: Parts List
LED4 Not included in this kit but in PWR-TRAFO KIT Heatsink HS1, HS2, HS3, HS4 Black Anodized Aluminum Heatsink Fuse Clips Fuse Clips 3 pairs of Fuse Clips Fuse F1, F2, F3 PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio... -
Page 25: Component Guide
8. COMPONENT GUIDE PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio... -
Page 26: Block Diagram
Bridge Recti er (-) Adjustable Fuse Protection LED Indicator DC Filtering Voltage DC Filtering Regulator NOTE: The AC voltage depicted in block diagram above comes from the low-voltage secondary winding of the power transformer. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio... -
Page 27: Schematic Diagram
10. SCHEMATIC DIAGRAM PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio... - Page 28 11. ERRATA / MANUAL CHANGE INFORMATION Any corrections, changes, modifications, improvements to this product will be listed on this page. PSU-2448Plus+ Assembly Guide Copyright © 2017 FiveFish Audio...