DDA cs8-service-manual电路图.pdf

CS8 Service Manual Klark Teknik Building Walter Nash Road Kidderminster Worcestershire DY11 7HJ Tel: +44 (0) 1562 741515 Fax: +44 (0) 1562 745371 Email: Website: CS8 Service Manual Telex Communications (UK) Limited In line with the companys policy of continual improvement, specifications and function maybe subject to change without notice. This Operator Manual was correct at the time of writing. E&OE. RadioFans.CN 收音机爱 好者资料库 2 RadioFans.CN 收音机爱 好者资料库 3 Contents INTRODUCTION . 4 CS8 SPECIFICATIONS . 9 OPTIONS . 9 CS8 DIMENSIONS AND WEIGHTS . 10 DECLARATION OF CONFORMITY . 11 INSTALLATION GUIDE. 12 ATTENTION . 13 CIRCUIT DESCRIPTIONS . 14 INPUT MODULE (CD1279) . 14 INPUT MODULE LINKS . 19 INPUT MODULE BLOCK DIAGRAM . 20 THE STEREO INPUT MODULE (CD1302/3). 21 STEREO INPUT LINKS . 25 STEREO INPUT MODULE BLOCK DIAGRAM . 26 THE GROUP OUTPUTS (CD1280/CD1286) . 27 GROUP OUTPUT LINKS (MATRIX). 31 GROUP OUTPUT LINKS (RETURN) . 32 GROUP OUTPUTS 1-6 BLOCK DIAGRAM . 33 GROUP OUTPUTS 7-8 BLOCK DIAGRAM . 34 THE MASTER MODULE. 35 MASTER MODULE LINKS . 39 MASTER MODULE BLOCK DIAGRAM. 41 THE BUS LINKING PORT. 42 THE METERBRIDGE . 43 THE POWER SUPPLY . 45 BUS CONNECTOR PIN OUT . 47 CS8 MATRIX CONNECTOR. 48 BUS LINK CONNECTOR . 49 CS8 PARTS LISTING. 50 SERVICE INFORMATION . 58 CS8 CIRCUIT DIAGRAMS . 60 The information in this manual has been carefully verified and is believed to be correct, however, EVI Pro Audio reserves the right to modify the product described in this manual at any time. This document may not be copied or reproduced by any method whatsoever, whether in part or in whole, without the written permission of EVI Pro Audio. Copyright 1997 EVI Pro Audio Group. All rights reserved. Manual Version DOC03-CS12M/A. RadioFans.CN 收音机爱 好者资料库 4 INTRODUCTION The CS8 console has been designed to provide the consultant, contractor, installer and user with a cost effective system which will perform to accepted professional standards, be simple for the untrained user to operate, and be tolerant of wiring and installation problems. There can be no excuse for a system which is over sensitive to the wiring and installation conventions used, and hums at every opportunity. High quality balanced inputs and outputs are only part of the story. Equally important is the way in which the console grounding system works, because it is through the console ground that all the noisy ground currents from the cable screens will flow. Any part of the audio signal path which shares the cable screen to console ground path within the console will effectively have the cable screen noise added to that signal path. The current flowing in cable shields in typical installations has be shown to be substantial (in the order of 100mA and above) and is caused by the difference in potential between the ground connection at each end of the cable screens. Of comparable importance to any system performance is the power supply. Internal linear power supplies may be less expensive, but are usually responsible for inducing noise into the audio and generating substantial amounts of heat, making it uncomfortable for the operator. Internal switch mode supplies may be cool running, but are usually even more of a problem with regard to noise. Another often overlooked point with internal power supplies is how to provide auto-switchover between 2 supplies without extensive modification thereby nullifying the warranty. Internal supplies are also a potential problem from a maintenance point of view. Most service technicians can easily fault find and repair a linear supply with commonly found components, but a switch mode supply does not make use of common off the shelf components. Although more expensive, a separate and generously rated linear power supply is used with the CS8 keeping heat and noise away from the console. Rack mounting ears are available for permanent installations, and the supply is UL and CSA approved. At this point it is useful to look at some of the features of the CS8. PAN AND ROUTING The pan pot can be switched between stereo panning mode, and left/centre/right panning mode. Left-centre-right panning to the master outputs provides much improved spatial positioning. The technique has been used for many years in the film industry where its benefits are well known. 5 In music systems the centre channel generates a more solid centre image, especially for the “star” of the show, and helps to maintain a stereo image across a wider sound stage. In mixed media productions and in church applications the use of a speech optimised centre cluster can improve intelligibility without compromising the music system performance. If only a stereo system is being run, and the pan pot is switched to stereo mode, then the centre output is individually assignable from each input or the from a sum of the left/right mix to provide a separate mono output for broadcast/film feeds etc. Another unique feature for a mixer in this class is individual sub group routing instead of the inconvenient and inflexible paired routing which always requires the use of the pan pot to route a channel to a single sub group. There is always a crosstalk performance compromise involved and it is done solely for economic rather than for operational reasons, as it halves the number of routing switches and removes the need for a pan in/out switch. The CS8 allows routing to the sub groups either individually or in pairs via the pan pot. EQUALISATION The CS8 input module has a 4 band equaliser with high and low frequency boost/cut controls and two swept frequency middle sections. There is more than two octaves of overlap between the frequency ranges of the mid equalisers while the frequency span extends to from 70Hz to 10kHz. AUXILIARIES The CS8 has 8 full time auxiliary send controls allowing easy session setup. These are normally post fade but can be switched pre fade. Normally the pre fade signal is pre fade post cut but byusing internal links it can be changed to the pre equaliser signal. Auxiliaries 7 and 8 can be used in stereo where stereo foldback, for example, is required. CHANNEL CUT The channel cut is a silent FET switch which can be remotely controlled through a connector on the rear of each channel by a simple connection to ground. In addition, when the channel cut switch is pressed, another contact is grounded on the Mute Remote connector. This can be used to control a Midi Mute controller, cue lights, or even to control another channel on the mixer by linking the mute out pin of one channel to the mute in pin of any other channel(s). Such an application could be a podium switch which would allow the speaker to override other channels for example. 6 SOLO/PFL MONITORING While it is normal to find PFL/AFL on almost all mixers, the CS8 goes a step further. The input solo is arranged to have priority over the output solo. This means that there is no need to de-select an output solo when selecting one or more input solo controls, and when the input solo is released, the output solo is re-established. A master solo level trim control is located on the master module for level matching, and the level of the solo signal is displayed on the left mix bargraph. An additional solo feature provided is Solo In Place. In this mode, soloing any input channel will cause all other input channels to be cut, thereby allowing only itself to be heard in the mix, correctly panned and at the right level, along with any stereo effect return channels. This is of great benefit during set-up and rehearsal and is much more useful than the standard PFL. A switch on the master module selects Solo In Place mode. SIGNAL LEDs The value of effective metering of signal levels throughout the signal path cannot be overestimated. Signal present and 0dB LEDs on all input channels give confidence to the operator while peak overload LEDs indicate when the channel is being driven close to clipping. However, it is unusual to find a peak overload LED at the very place where it is most needed, at the summing bus mix amplifiers, operating independently of the output meters. If the mix amplifier is overloaded and starts to clip, the only thing that can be done to rectify the situation is to pull down all input faders. On the CS8, there are overload warning LEDs on each of the sub group mix amplifiers as well as on the left, centre and right mix amplifiers. When the output meters are switched to observe the matrix outputs the bus peak leds also monitor the matrix bus. INSERTS Inserts are used to patch in external pieces of equipment such as equalisers, limiters etc. and are provided on all channels, group outputs, mix outputs and auxiliary outputs. To be useful and useable, the inserts should be at a level which is compatible with this external equipment. Sadly, this is often not the case. Some mixers have inserts at odd levels which will preclude their efficient use because of the noise penalty. All inserts on the CS8 are at a consistent level which is at the internal operating level of 0dBu. AUXILIARY INSERTS In most installations, it is quite normal to place an equaliser in the stage monitor sends, but this is normally external to the mixer. This of course means that the only way of listening to the monitor sends (internal to the mixer) is via the solo system. 7 Herein lies a problem. The operator does not hear the effect of the external equalisation. Also, any noise introduced by the external device is constant and not proportional to the setting of the send control. The ideal place to insert an external device is pre the send master control and this is the case in the CS8. EQUALISER CURVES The following graphs illustrate the equalisation and filtering responses of the CS8 console. CS8HFLFHF/LF EQUALISER RESPONSE CS8MIDMID FREQUENCY EQUALISER BANDWIDTH ADJUSTMENT CS8MID1MID FREQUENCY EQUALISER AMPLITUDE ADJUSTMENT CS8MID2MID FREQUENCY EQUALISER FREQUENCY ADJUSTMENT CS8HPHIGH PASS FILTER RESPONSE 8 201001k10k20k FREQ(Hz) -20.00 -15.00 -10.00 -5.000 0.0 5.0000 10.000 15.000 20.000 AMPL(dBr)AUDIO PRECISION CS8HIMIDvs11 APR 97 11:37:11THE HI-MID FREQUENCY EQUALISER RESPONSE SHOWING FREQUENCY RANGE THE HIGH AND LOW FREQUENCY EQUALISER RESPONSE 201001k10k20k FREQ(Hz) -20.00 -15.00 -10.00 -5.000 0.0 5.0000 10.000 15.000 20.000 AMPL(dBr)AUDIO PRECISION CS8HFLFvs11 APR 97 11:31:21 201001k10k20k FREQ(Hz) -20.00 -15.00 -10.00 -5.000 0.0 5.0000 10.000 15.000 20.000 AMPL(dBr)AUDIO PRECISION CS8LOMIDvs11 APR 97 11:41:51 THE LO-MID FREQUENCY EQUALISER RESPONSE SHOWING FREQUENCY RANGE 201001k10k20k FREQ(Hz) -20.00 -15.00 -10.00 -5.000 0.0 5.0000 10.000 15.000 20.000 AMPL(dBr)AUDIO PRECISION CS8HPFvs11 APR 97 11:43:15 THE HIGH PASS FILTER RESPONSE. 9 CS8 SPECIFICATIONS Nominal Operating Level +4dBu with a unity gain structure. Frequency Response 20Hz - 20kHz +/-0.5dB any input to any output at a gain 90dB 1kHz Channel Mute Attenuation 95dB 1kHz Channel Fader Attenuation 85dB 1kHz Distortion 0.005% 1kHz any input to any output at a gain < 50dB. Noise:-82dBu (24 channels routed and cut) EIN:-127.5dBu ref 200 ohms EIN:-128.7dBu ref 150 ohms Maximum output level:+20dBu into a bridging load Output impedance:<75R Maximum input level:+30dBu Phono connector levels: Nominal -10dBV Signal present threshold: -21dBu Peak led threshold:3dB below clipping Power consumption:< 600 Watts OPTIONS Input transformersMultipole connectors Output transformersBus linking cable LED MeterbridgeFlight case VU MeterbridgeSpare power supply with auto Flight Caseswitchover 10 CS8 DIMENSIONS AND WEIGHTS 32 CHANNEL 1432.50mm(56.40) 40 CHANNEL 1681.50mm(66.20) 48 CHANNEL 1930.50mm(76.00) MASTER AND OUTPUT SECTION 16 CHANNEL 934.50mm(36.70) 24 CHANNEL 1183.50mm(46.60) 4 STEREO MODULES Meterbridge Widths: VU46.6 inches/1183.5mm (This cannot be fitted to a 16 input console) LEDAs per corresponding console width. Console weights (packed): 1626.4kg/58lbsLED m/b 4.7kg/10.4lbsCombined31.1kg/68.4lbs 2436kg/80lbsLED m/b 6.0kg/13.3lbsCombined42.0kg/93.3lbs 3245.6kg/100lbsLED m/b 7.4kg/16.3lbsCombined53.0kg/116.3lbs 4055.2kg/122lbsLED m/b 8.6kg/19.0lbsCombined63.8kg/141lbs 4864.8kg/143lbsLED m/b 10.0kg/22.0lbsCombined74.8kg/165lbs VU Meterbridge6.5kg/14.5lbs (Add to weight without LED meterbridge) These weights assume a fully fitted console. Meterbridges are shipped in with the console but not mounted on the console. Power Supply Weight (packed): 7.8kg(17.2lbs) Dimensions: 2U Rack Mounting with a depth of 265mm(10.43) DIMENSIONS AND WEIGHTS 11 Declaration of Conformity The Manufacturer of the Products covered by this Declaration is Klark Teknik Building, Walter Nash Road, Kidderminster, Worcestershire, DY11 7HJ. The Directives Covered by this Declaration. 89/336/EEC Electromagnetic Compatibility Directive, amended by 92/31/EEC & 93/68/EEC 73/23/EEC Low Voltage Equipment Directive, amended by 93/68/EEC. The Products Covered by this Declarati