Allen_&_Heath_WZ20S_Service_Manual电路图.pdf

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1、 ALLEN&HEATH WARNING HIGH VOLTAGES Power Supply Unit (PSU) work should only be carried out by qualified personnel. We recommend that you use an approved Allen & Heath service centre for all power supply work. Please contact your local Allen & Heath distributor for more details. http:/www.allen- Radi

2、oFans.CN 收音机爱 好者资料库 MixWizard SeriesMixWizard Series WZWZ20S Stereo Audio Mixing Console SERVICE MANUAL SERVICE MANUAL Publication No: AP3638 RadioFans.CN 收音机爱 好者资料库 2 WZ20S SERVICE MANUAL CONTENTS INTRODUCTION, SERVICE AND TECHNICAL SUPPORT.3 FLIGHTCASING THE CONSOLE & DIMENSIONS.4 SPECIFICATIONS &

3、 CONNECTIONS.5 ORDERING A MIXWIZARD WZ20S UNIT, OPTIONS & MANUALS.6 ORDERING SPARE ASSEMBLIES.6 ORDERING SPARE PARTS.7-8 MONO INPUT BOARD COMPONENT IDENT.AG3379 MONO INPUT BOARD CIRCUIT DIAGRAM.C3379 STEREO INPUT BOARD COMPONENT IDENT .AG3408 STEREO INPUT BOARD CIRCUIT DIAGRAM.C3408 LEFT BOARD COMPO

4、NENT IDENT.AG3627 LEFT BOARD CIRCUIT DIAGRAM (PAGE 1 OF 2).C3627 LEFT BOARD CIRCUIT DIAGRAM (PAGE 2 OF 2).C3627 RIGHT BOARD COMPONENT IDENT.AG3626 RIGHT BOARD CONNECTOR CIRCUIT DIAGRAM (PAGE 1 OF 2).C3626 RIGHT BOARD CONNECTOR CIRCUIT DIAGRAM (PAGE 2 OF 2).C3626 CONNECTOR BOARD COMPONENT IDENT.AG363

5、2 CONNECTOR BOARD CIRCUIT DIAGRAM (PAGE 1 OF 3).C3632 CONNECTOR BOARD CIRCUIT DIAGRAM (PAGE 2 OF 3).C3632 CONNECTOR BOARD CIRCUIT DIAGRAM (PAGE 3 OF 3).C3632 WZ20S Service Manual AP3638 Issue 2. Copyright 2005 Allen & Heath. All rights reserved MANUFACTURED IN ENGLAND BY: ALLEN & HEATH AGENT: ALLEN&

6、HEATH Kernick Industrial Estate Penryn, Cornwall, TR10 9LU. UK http:/www.allen- Warning to the Service Engineer Allen & Heath warns that any unauthorised changes or modifications to the WZ20S unit may invalidate the legal compliance of the unit and could void the users authority to operate the equip

7、ment. RadioFans.CN 收音机爱 好者资料库 WZ20S SERVICE MANUAL 3 Introduction The information presented in this manual is intended for competent technical personnel to carry out service and product support for the MixWizard WZ20S console. We assume that the reader is familiar with the related electronic theory

8、and audio terminology, and is able to carry out basic servicing, faultfinding and repair of audio equipment of this type. Service personnel should also be familiar with audio systems, mains earthing and power requirements, as well as handling precautions. For information on the configuration, operat

9、ion and application of the MixWizard WZ20S please refer to the User Guide. Whilst we believe the information in this manual to be reliable we do not assume responsibility for inaccuracies. We also reserve the right to make changes in the interest of further product development. Service and Technical

10、 Support Under normal operating conditions the MixWizard WZ20S does not require user maintenance or internal calibration. Any service work required should be carried out by qualified technical personnel only. We are able to offer further product support through our worldwide distribution network. To

11、 help us provide an efficient service please quote the console serial number, the date and place of purchase in any communication regarding this product. General Precautions Your WZ20S is ruggedly constructed to give many years of reliable operation. However, you will extend the life of the console

12、and preserve its cosmetics by applying these simple common sense precautions. Avoid storing or using the mixing console in conditions of excessive head or cold, or in positions where it is likely to be subject to vibration, dust dirt or moisture. Do not use any liquids to clean the control surface o

13、f the console, a soft dry brush or dry lint-free cloth is ideal. Use only water or ethyl alcohol to clean the trim and scribble strips. Other solvents may cause damage to paint or plastic parts. The faders, switches and potentiometers are lubricated for life. The use of electrical lubricants on thes

14、e parts is not recommended. Avoid using the console close to strong sources of electromagnetism radiation (e.g. video monitors, high power electric cabling): this may cause degradation of the audio quality due to induced voltages in connecting leads and chassis. SAFETY WARNING! Mains electricity is

15、dangerous and can kill. Mains voltage is present within the unit. Do not remove the cover with mains electricity connected. To ensure your safety, mains earth is connected to the chassis through the power lead. Do not remove this mains earth connection. To avoid the risk of fire, replace the mains f

16、use with the correct value and type as indicated on the rear panel. Before switching on your console, check that the fuse is of the correct rating and type. This is clearly marked on the rear panel. Do not replace the fuse with any other type, as this could become a safety hazard and will void the w

17、arranty. 4 WZ20S SERVICE MANUAL Flightcasing the Console If the console is to be regularly moved we recommend that it is installed in a foam-lined flightcase. At all times avoid applying excessive force to any knobs, switches or connectors. Dimensions for flightcasing the console are shown below: Di

18、mensions Width Height Depth Desktop . 483mm (19”). 192mm (7.6”).530mm (20.9”) Rack mounted . 483mm (19”). 444mm (17.5”) 10U.135mm (5.3”) Packed. 590mm (23.2”). 260mm (10.2”).610mm (24”) Unpacked Packed Weight. 10kg (22lbs). 13kg (29lbs) WZ20S SERVICE MANUAL 5 Specifications 0dBu = 0.775 Volts rms +4

19、dBu = 1.23V rms 0dBV = 1 Volt rms -10dBV = 316mV rms INTERNAL HEADROOM: . Channels .+21dB . Mix to output.+23dB MAXIMUM OUTPUT LEVEL: XLR .+26dBu into 2k ohm load TRS jack .+21dBu into 2k ohm load PEAK INDICATORS:.Turn on 5dB before clipping METERS: .MIX 1,2 / MONITOR Peak reading 12 led 3 colour FR

20、EQUENCY RESPONSE: .20Hz to 50kHz +0/-1dB DISTORTION: THD+noise +14dBu 1kHz . 0.006% CROSSTALK: Channel shutoff measured at 1kHz .10k Ohm.variable 30 to +10dBu Stereo Ch in A. RCA PHONO.unbalanced.10k Ohm.variable 20 to +10dBu Stereo Ch in B. TRS jack.tip hot, ring cold balanced .10k Ohm.variable 20

21、to +10dBu EXT in 1-2. TRS jack.tip hot, ring cold balanced .10k Ohm.variable 10dBV (+4dBu option) OUTPUTS: Direct out 1-4. TRS jack.tip hot, ring cold, impedance balanced.75 Ohm .0dBu Mix out 1-2 . XLR.pin 2 hot, 3 cold, balanced .75 Ohm .+4dBu Mix out 2. TRS jack.tip hot, ring cold, impedance balan

22、ced.75 Ohm .-2dBu Mono out. XLR.pin 2 hot, 3 cold, balanced .75 Ohm .+4dBu Aux out 1-6. TRS jack.tip hot, ring cold, impedance balanced.75 Ohm .-2dBu Phones out 1, 2. TRS jack.tip left, ring right.for stereo headphones 75 to 600 Ohms INSERTS: Mono Channel: Send. TRS jack.tip send, ring return, unbal

23、anced.3k Ohm Mix out 1-2: Send. TRS jack.tip send, ring return, unbalanced.7k Ohm 6 WZ20S SERVICE MANUAL ORDERING A CONSOLE To order a new MixWizard console please specify the model number and AC mains voltage. MODEL DESCRIPTION ORDER CODE MIXWIZARD WZ20S 4 Mono + 8 Stereo Input Channels WZ20S/volts

24、 ORDERING AN OPTION To order an option please specify the model number required. RIAA OPTION WZ20S RIAA DUAL INPUT OPTION W21442/20S-RIAA FADER START WZ20S MONO FADER START OPTION 002-496 FADER START WZ20S 4M8S FADER START OPTION 002-501 MANUALS AND SUPPORT DOCUMENTATION DESCRIPTION ORDER CODE MIXWI

25、ZARD WZ20S User Guide AP3634 MIXWIZARD WZ20S Service Manual AP3638 MIXWIZARD WZ20S Flyer AP3637 SERVICE TOOLS The tools required to service the MixWizard WZ20S are standard to an electronics service workshop and are easily obtainable. The following items are necessary for disassembly and service acc

26、ess: 1-point Crosshead screwdriver (M3, M4, 4AB) AT0004 11mm AF Nutdriver (potentiometer, headphone socket and jack nuts) ORDERING AN ASSEMBLY The following assemblies for the MixWizard WZ20S are supplied fully tested. Please quote the description and order code for the part required. Printed circui

27、t board (PCB) assemblies: Mono Input PCB assembly 002-483 Left PCB assembly 002-484 Right PCB assembly 002-485 Stereo PCB assembly 002-487 Connector PCB assembly including Power Supply 002-486 IDC connector harnesses: WZ20S 16 way Main harness AL3669 WZ12/16/20S/464 34 way Master harness AL3518 WZ20

28、S SERVICE MANUAL 7 ORDERING A SPARES KIT It is recommended that the spares kit order code 002-491 is held and maintained by the service agent to enable in-field service repairs to the WZ20S independent of the ALLEN & HEATH factory. Commonly available items such as resistors, capacitors, tools and so

29、ldering equipment are not included. The contents of the kit are listed below and are supplied in a cabinet of drawers. Individual spare parts may be ordered. Please quote the description and order code for the part required. DESCRIPTION ORDER CODE QTY Fixings: Screw M3 x 6mm TT Pan Pozi Black AB0071

30、 10 Screw M3 x 8mm Pan Pozi Black AB0073 10 Screw M3 x 10mm Pan Pozi Black AB0076 10 Nylock Nut M3 AB0102 10 Screw M3 x 4mm Pan Pozi Black AB0233 10 Washer M3 Shakeproof AB0244 5 Screw 4AB x Pan Pozi Plated AB0252 1 Screw 4 x 5/16” Poly Pan Pozi Black AB2810 10 Screw M3 x 6mm TT CSK Pozi Black AB292

31、9 5 Fastfoot AK0102 2 Knobs and caps: Knob Red & Grey 11mm D AJ2074 10 Knob Blue & Grey 11mm D AJ2075 10 Knob Light Blue & Grey 11mm D AJ2076 10 Knob Green & Grey 11mm D AJ2077 5 Knob Dark Grey & Grey 11mm D AJ2078 10 Knob Yellow & Grey 11mm D AJ2079 10 Knob Brown & Grey 11m D AJ2080 5 Button 5.5mm

32、Square Grey AJ2864 10 Button 10 x5mm Rectangular Grey AJ2865 5 Button Round Black AJ2887 3 Button 5.5mm Square White AJ2960 10 Button 5.5mm Square Red AJ2961 10 Button 10 x 5mm Rectangular White AJ2962 10 Switch Cap Tall AJ8071 5 Fader Knob 11mm White+Black Line AJ8078 5 Fader Knob 11mm Yellow+Black

33、 Line AJ8080 5 Fader Knob 11mm Blue+Black Line AJ8081 10 Faders, Potentiometers, Switches and connectors: Pot 20KK (203K 11mm wide) AI8003 10 Pot 20KB centre click (203B 11mm wide) AI8004 10 Pot 200KC x 2 (204C 1mm wide) AI8005 10 Pot 20KB x 2 centre click (14mm wide) AI8006 5 Pot 20KK x 2 (203K 14m

34、m wide) AI8007 10 Pot 10KAC x2 (103AC 14mm wide) AI8008 10 Pot 5K (502RD 11mm wide) AI8111 5 Fader 10KD 100mm AI8117 5 Fader 10KD x 2 100mm AI8118 10 Switch 2PCO Latching 90 AL0162 5 Jack Socket Headphone AL0328 1 XLR 3 Pin Female Vertical PCB Mount AL2410 3 XLR 3 Pin Male Vertical PCB Mount AL2411

35、3 Phono Socket 24mm Dual Vertical PCB Mount AL3240 5 Jack Socket ” Stereo Unswitched AL3407 5 Jack Socket ” Stereo Switched AL3410 5 Switch 2PCO Latching Vertical AL8057 3 Switch 2PCO Latching 90Deg AL8065 5 Pot Nut 9mm AB8050 20 8 WZ20S SERVICE MANUAL LEDs and Semiconductors: Transistor BC549 NPN A

36、E0020 10 Transistor BC638 PNP TO92H AE0037 5 IC TL072 Dual Op-Amp AE0046 5 Transistor BC637 NPN TO92H AE0068 5 IC LM339N Quad Comparator AE0071 3 Transistor J111N FET T092B AE0083 2 LED 3mm T1 Red AE0086 5 IC CMOS 4053B AE0117 5 IC Op-Amp NE5532N AE0221 5 Transistor 2N4403 PNP AE0273 10 IC SSM2142P

37、Bal Out Driver AE0302 3 LED Bar Rectangular 12 Way AE2701 2 Transistor BC556B PNP AE3001 5 LED Rect Green 5X2MM Flat Top AE3501 5 LED Rect Red 5X2MM Flat Top AE3502 2 IC TL072 Op-Amp SIL AE8070 5 Transistor MPSA92 PNP AE8119 1 POWER SUPPLY: Insulation Guard AA3509 1 Mains Lead IEC-2 Pin (Europe) AH0

38、205 - Mains Lead IEC-3 Pin (UK) AH0206 - Mains Lead IEC-3 Pin C33 (USA) AH0323 - Fuseholder 20mm PCB Mount AL3178 - IC Opto-Isolator 4N35 AE0266 1 Diode Zener 47V 500mW AE2999 1 Transistor TIP122 AE3215 1 Diode BYV27-400 2A AE3469 5 Diode BYV26E 1A 1000V AE3470 5 Diode P6KE200A AE3471 3 Transistor M

39、osfet STP4NA80FI AE3472 3 IC SMPS UC3842AN AE3473 3 IC TL431 Voltage Reference AE3475 1 Bridge Rectifier 2KBP04M AE3477 2 Inductor 4.7uH 600mA AM3467 2 Transformer Wizard Switch Mode AM3476 1 Miscellaneous: MixWizard Box + Fittings AP2915 - Flex cable 39 way 200mm AH2900 2 Flex Socket 12 Way 90Deg AL2226 - Flex Socket 12 Way Straight AL2227 - Flex Socket 8 Way 90Deg AL2901 - Flex Socket 39 Way Straight AL2902 -