Instruction/ maintenance manual of the product CPS275 SoundCraft
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SOUNDCRAFT CPS250 CPS275 Console Power Supply User and Technical Manual IMPORTANT: please read this manual carefully before connecting your Soundcraft console power supply to the mains for the first time. For your own safety and to avoid invalidation of the warranty all text marked with these Warning Symbols should be read carefully.
© Harman International Industrie s Ltd. 1997 All rights reserved Parts of the design of this produc t may be prote c te d by worldwi de paten ts. Part No. ZM0195 Issue 3 Soundcraft is a tra ding divi sion of Harm a n In te rn at iona l Industrie s Ltd .
Table of Contents Introduction 1 Introduction 2 Short-circuit Protection 2 Mains Voltage Selection 3 Replacing Mains Fuse 3 Warranty 4 Recommendations For Installation 5 Recommendations For Installati.
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Introduction Introduction 1.
Introduction WARNING: THIS APPARATUS MUST BE EARTHED The CPS250/CPS275 are linear power supplies which, like other linear supplie s, produce DC voltages by rectifyi ng, smoothing and re gulating AC voltage s from the secondary winding s of a mains transfo rmer.
MAINS VOLTAGE SELECTION Special attenti on sh ould be pai d to th e fo llowi ng infor matio n: Do not change the voltage setting without first turning the unit off and unplugging the mains lead. This unit is capa ble of operating over a range of mains voltag es by means of a 4-position mains input fuse c arrier.
1 Soundcraft is a trading division of Harman In te rn at iona l Industrie s Lt d. End User means the person who first puts th e e quip ment in to regu la r opera ti on.
Recommendations For Installation FOR UK USERS ONL Y The wires in the mains lead are coloured in accordance with the following code: Green and Y ellow: Blue: Brown: Earth Neutral Live As the colours of.
Recommendations for Installation The CPS250/CPS275 power su pply is provide d wit h front p an el fix ing hol e s for 19" rack-mounting and will occupy 2U of rack space.
formed if this cha ssis and the p ower supply chassis a re in elec trical conta ct through the fixing rails they sha re in the rack. To avoid thi s situation, sta ndard isolating washers may be employed when fixing the power suppl y (or supplies) or any other unit into the rack.
88.10mm 9.52mm 5.95mm 5.95mm 350.50mm 427.56mm 482.60mm Dimensions PSU Linking (CPS275 Only) Con so le (O nly one ra il sh ow n. ) Lin k Con so le (O nly one ra il sh ow n. ) Lin k To C o n s o l e Stan d b y C PS275 Main CPS275 The output voltage s from the CPS275 a re fe d via diodes as shown in th e adjacent diagram.
Technical Specification Technical Specification 9.
Technical Specification MAINS INPUT VOLTAGE RANGE: 85/100/115/230 V AC +10%/-15% @ 50/60Hz RATED INPUT POWER (Max): CPS250 - 350 WATTS CPS275 - 450 WATTS MAINS FUSE RATING: Use T3.15A/250V (slow-blow) for 230V Use T6.3A/250V (slow-bl ow) for 85/100/11 5V OUTPUTS DC.
Technical Description Servicing should only be carried out by a competent service engineer. SEE THE WARNINGS STARTING ON PAGE 17. Technical Description 11.
Circuit Diagram (1) 12 Technical Description.
Circuit Diagram (2) Technical Description 13.
Circuit Description The CPS250 and CPS275 power suppli es provide +/ -1 7V at 4 Amps an d 5 .25 Am ps respective ly . Bo th give +5 V at 1 Amp , a nd +48 V at 0. 3 Amp. The PCB is SC3803. THE +/- 17V RAILS. This consists of two ide ntical +17V supplie s connected toge ther to give +/-1 7V.
The constan t-curren t pr otecti on sy stem w orks i n th e stand ard way; w hen an at tempt is made to draw excessi ve current, the out put vol tage is redu ced so that no mor e than a fixed maximum can be drawn.
The +5V Supply. Max current rating 1.0 Amps . This supply is primarily i ntended for powering console internal computer s; it also powe r s the co oling fan. The AC input is fuse d by F4 and fullwave rectified by D9-12, with C36 as the reservoir capacitor.
Servicing SAFETY. These safety note s a re dire c te d to thos e te s ting and repairing this powe r supply. Legal requirements me an that we must not encourage untr ained personnel to take the lid off. Servicing should only be carried out by a competent service engineer.
FAULTFINDING NOTES. +/- 17V RAILS. If one side of the +/ -17V supply is not working, the mut ual shutdown syste m will close down both sid es of the supply.
Reassem bly is simply a reverse of the procedure a bove. Parti cular care should be taken when fixi ng the regulators, ensuring that the p ins are not ben t or the c ircuit board pads strained when the fixing screws are tighte ned. The regulator s crews are ta pped into a relativel y sof t al um in i u m heat si nk .
PCB Layout 20 Technical Description.
Output Pinouts Technical Description 21.
22 Technical Description.
An important point after buying a device SoundCraft CPS275 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought SoundCraft CPS275 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data SoundCraft CPS275 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, SoundCraft CPS275 you will learn all the available features of the product, as well as information on its operation. The information that you get SoundCraft CPS275 will certainly help you make a decision on the purchase.
If you already are a holder of SoundCraft CPS275, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime SoundCraft CPS275.
However, one of the most important roles played by the user manual is to help in solving problems with SoundCraft CPS275. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device SoundCraft CPS275 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
