wz2082 service manual
Contents
1. Q an Se 25 TON ee m ma CP ER PRESS bach M Cas LAO Ld eo 1 doc iC oF 1 ll 1 RN POE ITO PF NOVO 69 O E d a N 8 76 5 4 oj uU 0 Os LZ Egg lase t C E CNC 66 gre gt 1 E 8 655 i i 1 a r RE ERE 29 O NP N 4 N 4 i NI He o SS as 1 11 86 pnr Li SUN 1 55 00 I Connector circuit board assembly component side view 2 Track 1 amp 2 Track 2 Input Sensitivity Both 2 track inputs can be set for nominal high level 4dBu operation or low level 10dB V operation as is common with much of the external equipment available today The factory default setting for 2 track 1 is nominal high level 4dBu operation and for 2 track2. E pam pam us 2 With the unit inverted remove the 4 connector cover screws and remove cover Access to the connector circuit board options can be achieved at this stage by carefully easing the circuit board assembly from the rear panel with the harnesses still connected It is not necessary to completely remove the circuit board assembly to change the options Refer to the section INTERNAL LINK OPTIONS for more details ALLEN 4 HEATH 6 2 85 completely remove the connector circuit board assembly 4 First remove the base cover of the main unit to gain more access Refer to 2 and 3 in the section REMOVING AN INPUT LEFT or RIGHT CIRCUIT BOARD for details on the removal of the base cover 5 Cut the cable ties along the bottom edge of the connector circuit board fixing the harness to the connector circuit board assembly and lift the circuit board assembly from the chassis 6 Then carefully disconnect the ribbon cable and the 4 flexible flat cables plugged into the circuit board assembly 7 Before desoldering the wires connected to the circuit board make a note of their colour and locations 8 The circuit boa
3. STEREO INPUTS s We MRE NEYINE INPUTS wen 18 2 0 17 48 15 46 13 4 1 19 9 0 8 7 6 5 4 2 1 L MONO L MONO L MONO L MONO INSERT INSERT INSERT INSERT INSERT INSERT INSERT KHZ __ 055 IN 0 10 E QUT REPLAY SELECT FOR TAPE OPERATING LEVEL H 4 IN RECORD 8 TRACK TAPE 2TAK 1 m WARNING THIS APPARATUS MUST BE EARTHED OUT REPLAY SENDS 2 HIGH VOLTAGE INSIDE AUX AUX5 AUX4 Aux3 CUE cue 1 DISCONNECT AC MAINS INPUT BEFORE REMOVING COVER CO z REPLACE FUSE WITH IN OUT SET FOR MAINS VOLTAGE CORRECT TYPE AND EFFECTS SENDS POST FADE EFFECTS SENDS POST MONITOR CUE SENDS PRE FADE RATING ONLY OR V AC MONITOR SENDS PRE SEND 100 120V 220 240V u TIP am dol MR T630mA 20nn 315 20nn RETURN IN RECORD
4. 442 6 _ p 75 4 14 1 i ry 11 8 8 8 8 88 8 8 8 8 8 8 8 eg ae 79 0 TJ e 000 P 6 6 1929 101g 9 92 2 0 2 7 6 m 6 Eu 15 0 69000000000900000 EL ER spp Cmq cB gt OLO SE 66660060600000000690 49 0 0 0 0 0 0 2 4974 4437 53 6 9 999999999999999 62 mu 0000000000000000 0T a 513 6 On 6 6 6 6 0 0 0 0 0 6 0 THe om on o O OF OF OF OF OF OF n Ona 1016 5 9 o 194 7 37 7 o0 29 OM 3 lt f 1 482 6 INSTALLING THE CONSOLE The Mix Wizard Series features the ALLEN amp HEATH Quick Change Connector
5. MADE IN ENGLAND BY ALLEN amp HEATH WNMixWizard WZ 20 8 2 5 0 ER A DIVISION OF HARMAN INTERNATIONAL INDUSTRIES LTD ALLEN amp HEATH 2 TRANSFORMER MAINS WIRING SLL amp SNDOMMDITES D Ce TEH i I ORANGE bur BLACK 52 T pui n XJ Sw H BRUN P 2 30V 2 rh oo SOR Bur TG gx TO r 3 gt 58 EUROPE DAMEL 20 STU MS Sek us SWITCH 3 Arr 5 A 353 Lat 0 AMT SURES s Jes dGra AAS 4 5 2349 3 SW ICM Se 151 Blond z r 0297 120 IT RN LI i USA amp CANADA YUE Amo Welt Sarda GREY SS 1 5 us Ny TT in Supr 4023 110 gt lt Bra 8 ANC WHITE ix MFI TE SWITCH Ru 20mm 2 ORAS CE
6. S 6 STIM_SL L MONO T 1IN SR STEREO REUS DC 1 RIMFEEDS zs 05 SKTI34 gt F_QUT_6 TAPE QUT 5 ekar 7 SKTI44 TAPE QUT 3 SKT141 STIN_6L L7MONO 19 d STIN_6R STEREO INPUT SKT142 n gt i RICHT NEN RTMFEED6 KT154 OUT SKT164 OUT 415 16V eTRKeR eTRK 1 OSC DC DC DC TB IC REVB DC _ MIX DC CON4 9 5 UNIT TITLE DRAWING TITLE CONNECTOR TT TRACK 2 QUT 2218 218 8 218 4 R R212 cele E RIGHT 1 47 5 6219 219 SKTP31 R213 Locas V RIGHT 47R 6213 Reet 478 CONNECTOR EARTH P2 P3 P4 PS PB P9 MANUFACTURED IM ENGLAND ALLEN amp HEATH DRAWING No ISSUE AG2940A C684 PECIA oftes o jo 5 10 19 10 o o PEE o 8 e C ola 16 6 osho ALLEN amp HEATH amp 13 19 O 5118 0 in uw 29488155 1 5 12 ot 12 12 12 1 11 loho 1 CON 11 1 3 11 1 11 6 RETURN 1 TAPE RETURN 5
7. es rar ri 454 m z n aam A 4 1 i ut ll 3 ee i aat E ia 2 REST te EH waj s RSE tom Er ee i 1 a a 3 I TT xl TALK TO L R TONE TALK PHONES MIX PFL CUE 1 8 BACK 3 JEN TT 3 19 m oj tae jo tsa To 5 2 8 LEFT PCB 862938 ISS 2 Jo um lt 45 144 x Las 0 E L 9 o 9099918885 ji 288 5 9016 3 Pag P29 P14 Pil 18 P7 P6 PS pis Pl cea M s 4 1 7 5 T i 115 Pe amp Pz P24 5 Pee P23 Pag 1 5 PF 15 2 2 i 29 ares 4 88 94 8456 5 665659 V JN CUEL CUELPOST 8 47 25 81 I i RMIX 69 Cut MIX CUEPOST 475
8. 4 MIX 43 MX 5 M MIX O P 65 MX OP MIX Pie PFL MIX OP11 PFL_DC 5 214 L POST gt O TO RIGHT PCB pema p3 184082 it 5 14882 MASTER 2 6WAY TO CONNECTOR POD Go CUE2POST CUE LPOST A4 POST 3 POST 66 POST AS POST MON MONL TB_OUT TB DIM LNTR_SND SWAY TO CONNECTOR PCB REV MIX_DC gsc RTN 7 LINS SND LINS_RIN G H MANUFACTURED IN ENGLAND BY 92316 SHEET 2 OF 2 ALLEN amp HEATH DRAWING No 72939 ISSUE 5 MONITOR LEVEL 6 3 4 PFL RIGHT MONITOR METER PHANTOM TAPE8 PFL 1 AS CUE 48V ON REV rm lt 0 D 2 ES 2 8 RIGHT AG2939 1552 SEE D D P P D P 9 TT E E 8 2 mE nig m BEE al n 51 ero x lo jo o rxe lo a 0 8 _ o g x n is x 0 20 gt gt 48 2 cde 45 J o 1 25 o o iss o Ow CK d 2 O Y 0279 xea 55 o 457
9. FADER 5 m 47 1 dB 8 7 RINS_SND RINS RIN NOTES UNIT TITLE ARI 2773797 1 RESISTORS MARKED ARE 1x DLP 1174797 ALL OTHERS ARE 5 1 44 UNLESS OTHERWISE MARKED DRP 435497 1512 PWR WAS amp VA 162579 ELECTROLYTIC CAPACITORS ARE pF VOLTS PAGE 1 F 2 DRAWING TITLE SICHT MANUFACTURED IN ENGLAND BY ALLEN amp HEATH DRAWING C 2 9 e 66334 ISSUE 2 gt TALKBACK AMP 1 R7 T1072 cya 18 00 MONITOR 47 25 LEVEL R48 Roe 188K 188K STEREOZ MONO R4 16K 2 TK MONITOR SOURCE SELECT 48 10K L POSF lt 9I AUXS R POST 1672 TALKBACK DIM 7 T E al f ES p 55 ua 4 E E S S B8 BB R43 i tu 2 5 8 855 TLe72 L 1 11872 d 5 MIX SEES R33 TB_DIN LEFT METER RECTIFIER R 1 882 a 52 RM p 47 16 TRI i R55 214 S SEG i 26 1 58 R56 86 in SZ 8 RD N t D 5 REVISION BY DATE MANUFACTURED IN ENGLAND BY ARI 2773 97 DLP 11 4 97 DRP 16 5 97 NOTES 1 RESISTORS MARKED x ARE 15 ALL OTHERS ARE Sx 1 44 UNLESS OTHERWISE MARKED 2 ELECTROLYTIC CAPACITORS ARE
10. eub 16 A 2 2 e 2 2 G 2 s 2 g 20 20 4 3 4 30 30 0 0 0 0 AU AU AU Cal gt gt wc 9 gt De gt 8 8 8 8 8 8 8 8 gt gt E ATY gt Bec 3 gt c E 9 gt fc E gt Se gt lt 9 8 0 post PRE mrosr post PRE PRE 8 8 U gt uvm x AUX AU 5 5 A 9 8 8 8 8 8 8 gt x 2 gt E rat gt Me gt De E gt Dice E A n gt oc 0 0 0 0 POST POST L post POST POST L POST A A A C C MONITOR PAN Ly CUE MONO 5 MONITOR ES gt LEV H 5 R k 000 000 EVEN ODD EVEN ODD EVEN s Bo O E O ikHz TONE TALK CUE
11. TYPE 9 00 BALANCED OUTPUT 2 TRACK 1 IN uS x 5 6 58 css 47785 I RTH_SA RINFEEDE LEFT BTRK1L RETURW 6 XT 4 RIGHT 85 228 SKT271 180dBV RIGHT TAPE RETURN 7 RINFEED SKT 4 47 25 REV Dx 5 2 4 412 371 581371 2815 16V j 4 R R I N S E 2 18 Rave L 0408 C412 5417 14062 i f 47R 0409 16 35 680 7 51296 noi 9 RB By 411 75 P492 I NZ iN SA 27785 LINS RTN R381 SKT301 Dat 228 cr 8 478 R NL 4662 C413 cas 251 t E N 18 35 478 RINS_RTN 23 Leori 16 17 14 P11 e P483 1888 1 some CUE C404 C405 5 8 gt R311 SKI RIRI SKT321 1087100 1 1 TAPE RETURN 9 SKTB4 cueipast gm Jjy fUEePOST ot AV 2463 ete 8 Raa 1 R322 A 496 mw 8 S 484 1 4882 AUX OUT 3 6 R33I SKT331 R341 SKT341 487 av TRLKBACK MIC A3 POST aL AV 3 A4_POST cap AY 1 2 K R a 142 C amp 52 lx R332 R342 TB_MIC L T EDGEPIN 238 8588 R351 51351 R361 58736 P409 PALA 2401 414 A5 POST wb AM AUX 5 86 05
12. RTNEEED1 RTNFEED3 16 HILOW DC 9 TAPE RETURN 6 TAPES RTNFEEN2 RINFEEDS HILOW DC RTNEA TAPE RETURN 3 TAPE RETURN 7 TAPES TRPE 03 RTNFEED RTNCEEHL HILOW_DC TAPE 41108 26 REVL DC 1_ ND_1 RINIA RINFEEDZ TAPEZ TAPE RETURN 8 REV2_DC TAPES RINFEEDA RTNFEED 1 SND_2 HILOW_DC OSCILLATOR res xs Hes m Sto K 169 REVB_DC hrs Ra RTNBA V L TLE72 akg deep R 85 y V INS INS A DC 155 REVISION BY DATE NOTES UNIT TITLE ORIGIN AAT 24 04 97 1 RESISTORS MARKED x ARE 1x PRODUCTION 17 84 97 ALL OTHERS ARE 5 1744 UNLESS OTHERWISE MARKED 1 VALUE CHANGE 2 ELECTROLYTIC CAPACITORS ARE AF VOLIS DRAWING TITLE RE PACKED IC S 29 4 97 Wt Yo y V IC11 IC21 1231 1041 Leve 272 1 8721 61 072 y t y CONN3 RTNZA TAPES REUS DC 1 5ND 5 3 DC RTNSA 1 5ND 3 6 RTN3A RTNFEEDS REVG_DC TAPES I SND 6 REVA RINGA 1_SND_4 RINFEEDT RTNFEEDS _ REY DC G MANUFACTURED 1N ENGLAND BY gt CONNECTOR POD PCB AG294 B ALLEN amp HEATH 29428 PAGE 1 OF 1 DRAWING No BLOCK DIAGRAM eli 9 10 19 20 2 BAND EQUA
13. 85 o3 fo 0 o Els 8 ux33 P18 PS 11 A A 2 MIKL MIMR SPL9 PFL M EES MIX MIX MIX De ce 9 Q n Pia Y Y 5 TBMUTE 4 x 2 VR4 2 CUE1 2 POWER SUPPLY FILTERING 8 C3 al T 47 25 2s 2 64 147 25 47 5 E LORPF 83 LBRPF TC BUS MIXDOWN f Sst 91g 5 1 Ple TRUE lt O Pi PL P9 CUEL_NIX P6 L_PosT lt PH 2 MIX O P4 AUX6_NIX O P JC O P5 i 1 t I i R3 50 3l w oe 1 PFL MIX P11 LEFT PCB iua EE PHANTOM 4BV 1 x r 2 n es pum CUE2_MIX LM POWER CONN 2 RUX6 ae ON Ww 2TRKER eTRKPL AUX6 NIX 1 RIJ 448V i YRS 1 ach CUEZPOST CUEIPOST RIGHT BALANCED OUTPUT DRIVER M POST PDST 6 POST 5 POST MON_R TB_OUT TB DIM 164 LITR_SND R 6 x x TO CONNECTOR POD C16 BALANCED OUTPUT TO CONNECTOR PCB mm 47 25 RIB RINS_RTN i 68 61 8 889 47 25 5532 _ R ne 18KD R RTN B us 0
14. i Overlap in the centre gt r and e LOS C solder SM lt BUSS WIRES gt P og E _ Pp P p lt lt P 55 7 2 85 9 ALLEN amp HEATH INTERNAL LINK OPTIONS The console 15 set to satisfy most applications that should be encountered However the following internal link options are offered to provide alternative settings for those applications that may require them Access to the options requires the removal of the rear covers depending on which option settings are to be altered Refer to the section for removing circuit board assembly on which the link option is located Some options involve the cutting of circuit board tracks and soldering of circuit board links and should only be carried out by competent technical personnel Further information is available from ALLEN amp HEATH if required MONO INPUT CIRCUIT BOARD ASSEMBLIES X8 DAUGHTER CIRCUIT BOARD ASSEMBLY X1 STEREO INPUT CIRCUIT BOARD ASSEMBLIES X6 Unit inverted with the base and connector cover removed Channel Pre Fade Aux Send Options The pre fade sends are set post EQ and post ON as standard However link options on each channel assembly allow pre EQ and or pre ON if required Refer to the diagram below Channel Direct Output Source The direct outputs are sourced post fader as standard A link option is available per channel to select a pre fade source Re
15. ee E F HA 233 POST FADE UNIT TITLE DRAWING TITLE INPUT CIRCUIT DIAGRAM TYPE 2894 PINS 1 amp 8 OF CONNECTOR 1 VA 240 335 14 PIS P6 PB Pee P23 1858 4 7 5 4 MIX CUE2 MIX MIX 44 MIX MIX MIX MIX_R PFL_MIX PFL DC 2 eons 32 TC WIRE BUSS SOLDER PADS INF 7 425 288 xn Hel TLa7e Pia 11 PB P9 P P4 P5 Pla 4148 184148 228 3 k G1 MIX G3 MIX G4 GS_MIX G6 7 MIX GB MIX L MIX R MIX N 19 21 CUEI MIX CUE2 MIX MIX 4 MIX 65 MIX 1 CUE2 AUX3 AUX4 AUXS AUX6 1 R36 4 1 851 45 1848 RSS 18K 18K 18K 18K 18K 18K VRB VRI 1 YR1i VRIZ VR13 26 ti PFL PEAK RD R58 20KK 20KK 28 0 ZAKK R V V V 7 V N R36 4K P PRE FADE P 518 P sln P sla E S SWITCHED 2 47725 47 549 A POST FADE te k ig i PFL_LED ion Ro n Ru RS rin n EP gt PRE FADE AUX LINK OPTIGNS V l JAB POST ON 1 2 88 asss 59 PRE EQ POST J29 PRE ON G1 MIX G3 MIX GS MIX 67 MIX MIX MIX 62 MIX G4 MIX G6 MIX 58 MIX MLX R MIX IN EMCLAND 2Y ALLEN amp HEATH DRAWING Q4 ISSU
16. R21 MECZLINE IN 47763 T bel 321 LINE IN LINE IN 3 3 MICZLINE 3 T_SND_3 LINE IN 4 E y 1 A MIC LINE SKT43 47 63 CH4 b 4 1_5 _4 5741 1_RTM_4A 3 INSERT 1 4 1 2 5 167 16 B 155 REVISION BY DATE NOTES A ORIGIN 760 OTHERWISE MARKED e PHASE 2 2 ELECTROLYTIC CAPACITORS ARE pF VOLTS 3 W TAPE RETURN 1 RTNFEEZL 55115 R18 ELEC I RTN 1A 47 25 n RTNFEE De TAPE RETURN 2 CP6 47 25 REV DC 1 8 2 5 24 gt _ 1_RTN_2A 47 25 SaR RTNFEET3 R38 1 RTN 3A 228 47 25 RTNFEED4 TAPE RETURN 4 SKT44 45 848 IL I RTN 47 2 RTNFEEDS a UNIT TITLE DRAWING TITLE INSGND INSERT MIC LINE IN LINE IN INSERT MICZLINE IN LINE IN LINE IN 11 INSERT LINE IN IN INSERT CES CONNECTOR PSU M I RTN 5 1 RTN 56 1_RTN_6 pup m B 61 P39 P37 FFC39ST PP 169 16 MANUFACTURED IN ENGLAND BY ALLEN amp HEATH DRAWING No ISSUE
17. system The rear connector module may be hinged and locked into either of two positions Rear connectors for desktop operation with the control panel sloped at a convenient 15 degrees or Underside connectors for 19 rack mounting in a compact 10U space connector position can be easily changed at any time to fit your application To change the position remove the crosshead locking screw on each side swing the connector pod into position and refit the two Co TEE kb e CS Do not transport or carry the console with the locking screws removed Do not attempt to remove the connector pod from the console 2E 8SM SCTC WS 19 Rack Mounting Mount the console in the rack using 4x M bolts each side for maximum strength We recommend you fit the bolts with plastic cup washers to protect the panel and they look good These should be available from the supplier of the rack unit or a good hardware store 1 U Desktop Operation The console is fitted with rub
18. 2 the factory default setting is low level 104 operation Most outboard equipment includes output level adjustment but if you wish to change the input sensitivity the rear connector circuit board assembly can be reconfigured 2 85 2 1 amp 2 level Option location Connector circuit board assembly trackside view Solder link between square pads for 10dBV operating level on 2 Track 1 Phantom power links Cut tracks between square pads for 4dBu operating level on 2 Track 2 11 ALLEN amp HEATH ORDERING SPARE PARTS ORDERING A CONSOLE To order a new console unit please specify the model number and AC mains voltage required MODEL DESCRIPTION ORDER CODE Mix Wizard 20 8 2 8 Mono 6 Stereo Input channels WZ 2082 volts Mix Wizard 16 2 16 Mono Input channels WZ 1602 volts MANUALS AND SUPPORT DOCUMENTATION DESCRIPTION ORDER CODE Mix Wizard 20 8 2 User Guide AP2932 Mix Wizard 20 8 2 Service Manual AP2933 Mix Wizard 20 8 2 Brochure 2941 SERVICE TOOLS The tools required to service the Mix Wizard range of products are standard to an electronics service workshop and easily obtainable The following items are necessary for disassemb
19. 48V IS DISABLED TO PREVENT ACCIDENTAL DAMAGE INDIVIDUAL CHANNELS CAN HAVE 48V DISABLED REFER TO THE LINK OPTIONS SECTION IN THE USER GUIDE OR SERVICE MANUAL If ground loops cause problems connect the cable screen at one end only Balanced outputs may be connected to unbalanced inputs and vice versa by linking the signal cold to OV ground 2E 8SM 3 ALLEN amp HEATH SPECIFICATIONS 0 0 775 Volts rms OdBV 1 Volt rms HEADROOM 21dB channels 23dB mix to output 27 2kohm max load 21dBu 2kohm max load peak reading 12 bar LED PEAK LEDS uuu Turn 588 before clipping FREQUENCY RESPONSE 20Hz to 50kHz 0 1dB DISTORTION THD Noise at 14dBu 1kHz Channel to mix output 0 008 WEIGHT unpacked 11kg packed 14kg CROSSTALK Referred to driven channel at 1kHz Channel fader off lt 90dB Channel Off NOISE Measured rms 22Hz to 22kHz bandwidth Mic input EIN 150 ohm source lt 128dB LR output residual noise lt 97dBu 101dBS N LR faders unity mix noise lt 82dBu 8608 S N POWER SUPPLY internal linear regulated AC Mains input IEC socket with lead supplied 100 to 240V AC 50 60Hz factory wired to country voltage 35W max 100 120V AC Te30mA 20mm 220 240V AC T315mA 20mm Power consumption Mains F
20. AUX 6 4 R358 R362 Pee Patt 16v O 4 R 47 T 4 B D 5 H MANUFACTURED IN ENGLAND BY NOTES UNIT TITLE 1 RESISTORS MARKED ARE ALL DIMERS ARE 5X 174W UNLESS OTHERWISE MARKED DRAWING TITLE CONNECTORZPSU en ALLEN amp HEATH DRAWING No C294906 ISSUE 3 2 ELECTROLYTIC CAPACITORS ARE pF VOLTS AG2940A um L MONO 9 STEREO INPUT 5 RIGHT 18 5KT94 TAPE OUT 1 x cd 5 88 SKTi 4 007 2 j 581181 L7MONO STEREO INPUT RIGHT 6K91 RTNFEED2 8111 6 858 8112 TAPE OUT exon SKT184 m GKB 122 TAPE OUT 6X6 RTNFEED3 Sk 13 M S STEREO n N 13 INPUT s ae RICHT 14 E 1 5 6 12 MONO 15 CLA STEREO INPUT 5 1 6 umm RIGHT lt gt 10 ORRECT ION WR MOD A no gt 88808802 CH x RSI FMRI RAR VOB 37 KH 55 9 571 L R DC She STIN L STIN_2R REV Dc T OUT 3 T_OUT_4 I STE STIN 4R 8 4L t u 16 1 RESISTORS MARKED ARE Jk ALL OTHERS ARE 5x 1 44 UNLESS OTHERWISE MARKED 2 ELECTROLYTIC CAPACITORS ARE pF vOLTS ad
21. GREY 4 Alu WHIIL SWITCH AROWN 20 dicen cde CRANE 10 EU i 30 VA 17 4 ALUE PART LEES t 9 sss 2 uht F amp u 6 WHITE AM0916 17 3 BLUE VosccOo0N _ 24 uel uno 0184 habia Z 34 183 WLS MEM L Hlyg3H Vr 66 ATSASSSY Ail yil TI 00 jgv ilu parowa pov 3111 Deu SISSVH OF didi 905625 ON 829 plug ut dod Jaysneg i SISSEUD ON godg 3 NI ALI PEALE ADA oo cob gt 5 6 HA TB LER ON di S7 51 511 512 518 55 Re A 3 ILD6 LD R31 13 POST POST PAN PRE 5 7PRE 84 a3 Ae gt UR13 15 VR11 VR10 VR9 R58 252 R6T anra Sn 2 trJ o L1 jo R64 2 INPUT AG2894 155 2 AOON n PeeP2i P19P20 335 234 21 0 fo gt 5 14 P3 P23 EQ 1 CUT GAIN PAD PHASE LEVEL FREG LEVEL FRE
22. M3 x 6mm Pozi Black 0071 Screw M3 x 10mm CSK Pozi Black 80093 Screw x 10mm Pozi Black 0076 Screw x 12mm Pan Pozi Black 0078 Nylock Nut 0102 Knobs and caps Knob Yellow amp Grey 11mm D AJ2079 Knob Dark Grey amp Grey 11mm D AJ2078 Knob Green amp Grey 11mm D AJ2077 Knob Blue amp Grey 11mm D AJ2075 Knob Brown amp Grey 11mm D AJ2080 Knob Red amp Grey 11mm D AJ2074 Knob L blue Grey 11mm D AJ2076 Fader Knob 11mm White Black line AJ8078 Fader Knob 11mm Yellow White line AJ8080 Fader Knob 11mm Blue Black line AJ8081 Button 5 5mm Square Grey AJ0363 Button 5 5mm Square Red AJ0364 Button 5 5mm Square White AJ0373 Faders Potentiometers switches and connectors 10KD fader 100mm 10KD x 2 fader 100mm 20KK 203K 20KB 2038 centre click 200KC x 2 204C 20KB x 2 203B 14mm wide 20KK x 2 203K 14mm wide 10KAC x 2 103KAC 14mm wide 5KD reverse 502RD 5KB 502B Pot Nut 9mm Switch 2PCO Latching 18108 18116 18003 18004 18005 18006 18007 18008 18111 18112 8050 AL0162 Jack Socket Vert PCB nut IN INSERTS ST1 2 AL8082 Jack Socket Vertical PCB nut Jack Socket Headphone XLR 3 Pin Female Vertical PCB Mount XLR 3 Pin Male Vertical PCB Mount LEDs and Semiconductors 2E 8SM LED 3mm T1 Yellow LED 3mm T1 Green LED 3mm T1 Red LED Bar Rectangular 8Green 3Yellow 1Red Transistor 2N4403 PNP Transistor BC214C PNP Transisto
23. to the PFL mix bus These signals are switched with 4053 CMOS gates located on the RIGHT circuit board No AG2939 The supply the 4053 is SV DC and is derived locally from the 16V The gates are switched when a PFL switch is selected EARTHING THE AUDIO SYSTEM The console chassis 1s connected to mains earth via the mains power cable Console audio OV is also connected to chassis FOR SAFETY REASONS NEVER REMOVE THE EARTH WIRE FROM THE MAINS PLUG Multiple earth paths cause earth ground loops which may result in audible hum and interference These may be avoided by making sure that there is only one path to earth from each piece of equipment disconnecting audio cable screens at one end if necessary INTERCONNECTIONS Where possible use balanced connections for the CHANNEL inputs AUX CUE SENDs and both L R outputs to minimise noise pick up Avoid running audio cables near to mains or lighting cables thyristor dimmer units or power supplies etc These may cause audible hum and buzz The use of low impedance sources significantly reduces interference pick up Check the cables for correct wiring to avoid problems with phase reversal and unreliable connection The MixWizard WZ 20 8 2 follows the convention for XLR pin 2 and jack tip signal hot ALWAYS USE BALANCED CABLES WHEN CONNECTING TO PHANTOM POWERED MICROPHONES WHEN USING NON PHANTOM POWERED OR UNBALANCED MICROPHONES OR UNBALANCED LINE SOURCES MAKE SURE THAT THE
24. 0 20 60 30 20 60 30 10 20 SO 301 10 20 60 30 10 20 60 30 19 20 60 30 A A A A POWER oN TAPE RETURN INPUTS 10 20 60 30 SOOHZ SkHz 50042 25882 50087 g kHz 50082 5 kHz 1 1 1 1 gt gt o gt lt 15 5 5 180Hz 0 3 45 450 45 450 35Hz KHz 35Hz KHZ 180Hz 180Hz TAPE1 REV Y ex TO E TRACK BOUNCE MIC LINE MIXB TAPES 4 REV E y TAPE7 REV 5 5 ALL MIXDOWN ON FADERS DOWN PHANTOM ALL MIC LINE TO MIXB EXTRA INPUTS AND FX SSS ALL MIXAB TO L R BE MIX ALL CHANNELS TO 2 TRK J 15 415 STEREO INPUTS LF 16 16 3 9 6 6 15 18 3 43 EQ IN Q IN UE GU UE 6 s gt 9 s R Q x i 0 0 0 0 0 0 CUE CUE CUE CUE CUE
25. 5 82 CEL NIN 1 0K I CUE2 MIX I A3_POST R3 180K amp 6 IX 1 44 MIX A4_POST 47 85 R d 100K 4 Y R34 I 5 AS POST 47725 RS 180K I t 3 6 MIX POST 47725 R E rr 100K Cee cers 15 RD 1 3 47 25 5532 as i m SK ue 5 228 18 N VJ n E 10K C i 06 LINS_SN A LINS_RTN BC 3 jiss REVISION BY DATE UNIT TITLE a ORIGIN ARI 7 3 97 1 RESISTORS MARKED ARE 1x 1 PRODUCTION 16 4 97 ALL OTHERS ARE Sx 1 44 UNLESS OTHERWISE MARKED e C24 ADDED CONN4 L L DRP 15 5 97 2 ELECTROLYTIC CAPACITORS ARE 15 PINS SWAPPED ee TALKBACK MUTE TALK TO LZR t 1 01 Su I QUT R53 8557 LNX 728 TALKBACK TRIM 31 pakt TALK TO GROUPS T 51 NIX i PPK i R63 2 C gt aa 54 22K L H gt 64 1 RES 2 8 i Casma I R66 1 L gt 66 NIX m KE TM REB 22 8 AA CI NIX I eek t R t TALK TO CUE 108K i ao T 1 T DIM CUEL t N 10K I 896 4 C
26. ALLENS 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 amp Heath service centre for all power supply work Please contact your local Allen amp Heath distributor for more details http www allen heath com Wz20 8 2 20 INPUT 8 TRACK RECORDING CONSOLE SERVICE MANUAL PUBLICATION AP2933 INTRODUCTION The information presented in this manual is intended for competent technical personnel to carry out service and product support for the Mix Wizard WZ 20 8 2 We assume that the reader is familiar with the related electronic theory and audio terminology and is able to carry out basic servicing fault finding 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 further information on the operation and application of the Mix Wizard WZ 20 8 2 please refer to the USER GUIDE publication AP2932 supplied with each console 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 SUPPORT Under normal conditions the Mix Wizard WZ 20 8 2 does not require user maintenance or internal calibration Any service work requ
27. E 2 z lt n gt Lil LL A gt 2 Z 111 49 LL BN LL gt Oe lt C CT O n0 lt I LL 1 e xt l m OO N El jo 28 58 59 Sia a E amp Ge93 ISS 1 314 2 2 4 218 P PS P6 P4 17 CoN oM oM P180 Pii Piz P19 P13 Pi4 P15 6 Pid Pel oM o oM oM oN oM _ lt GO ASE s s at az E L lt r T _ WF D d oan ih a 21 2 1 n s 1 e gt 2o w Z rn ig p Ze F m CR Hung doa Te OLG w a eo 7 ra s S 254 _ Nm Og IE E m 37
28. LISER 10 4 FADER 1 2 FL 3 4 HHH 5 6 FO 7 8 O 1 j j p pue E T lt o a as s a w s RING RETURN 6 EDD AUX SENDS 1 e oror OM 8 1 E aa o 3 2 lt 1 8 eon MONITOR SELECT cue 1 2 Lever _ U REVERSES ALL MIC LINE WITH TAPE INPUT O Aux 3 4 ROUTES ALL CHANNELS TO L R FOR MIXDOVN BIETET D AUX 5 aux 6 2 1 ss E ce INSERT L E O amp AUN C em 5 Se 3 E ed 1 2 D wO 6 QUT IN 2 OUT IN 9 Q 4dBu BALANCED L R FADERS ru Dix DT
29. Q D E VR8 J36 l L mit Ajo R32 o 1o fo lo FLEXI TO CONNECTOR POD PHASE 324 PAD c9 R10 47725 TO A CONNECTOR 227 2151 j PCB 753 Es 53 847 i 1 Rit 1K2 47725 r CN1 L2Kx 819 821 829 AT T NF NF V V V V DIR_OUT 54 Spo 25 RES FILTER C34 A 854 7 EQ IN 1 56 pe 86 336 C16 47725 R32 NF L N 5 1 8 8 B FREQ INS 35Hz TO 1 2 Rig BR 2 2 FREQ PFL 58882 TD 15kHz 28 8 R64 85 PFL_MIX I I Re DS USED FOR BOARD SPACING PFL_TC CHANNEL 1 SK 4148 H REVISION ORIGIN DWD 014704797 PRODUCT ION 18784797 NOTES 1 RESISTORS MARKED M ARE 1 ALL OTHERS ARE SX 1 44 UNLESS OTHERWISE MARKED P ELECTROLYTIC CAPACITORS ARE pF VOLTS 3 DO NOT MODIFY THIS WITHOUT REFERENCE TO OTHER WIZARD INPUT CCTs Cig 330P 1839 INPUT PREAMP r 9J22 DIRECT OUT SOURCE 9916 k 11 872 8 3 GN L cog 477285 NF R6 7 v 4d i 128K LD2 R59 1467 R31 NF id V NF 32 PFL LEN PRE FADE c29 NF e U
30. RAM sheet 1 C2939 RIGHT CIRCUIT BOARD CIRCUIT DIAGRAM sheet 2 nennen nnne nnne nnns C2939 CONNECTOR CIRCUIT BOARD COMPONENT 22 nnne AG2940A CONNECTOR CIRCUIT BOARD CIRCUIT DIAGRAM sheet 1 2 4 4 00 1 0 C2940A CONNECTOR CIRCUIT BOARD CIRCUIT DIAGRAM sheet 2 sss C2940A CONNECTOR CIRCUIT BOARD CIRCUIT DIAGRAM 3 enne C2940A CONNECTOR CIRCUIT DAUGHTER BOARD COMPONENT IDENT sese AG2940B CONNECTOR CIRCUIT DAUGHTER BOARD CIRCUIT DIAGRAM C2940B ROS DIAGRAM ND CER 34 copyright O 1997 ALLEN amp HEATH All rights reserved Publication AP2933 Issue 1 ALLEN amp HEATH 2 2E 8SM TECHNICAL DESCRIPTION The ALLEN amp HEATH Mix Wizard WZ 20 8 2 is a dedicated 8 track rack mount or desk standing mixer with 8 mono inputs and 6 stereo inputs All mono input channels have a 4 band 2 sweep EQ with 6 individual aux sends and Direct output The 6 stereo inputs have a 2 band EQ with 2 stereo cue aux sends and 2 mono aux sends The 8 tape return inputs have individual level and pan controls with a stereo cue facility In addition the Mix Wizard WZ 20 8 2 also has extensive talkback facilities and an internal 1kHz sinewave oscillator for level checking The internal power supply unit is located in the rotating connector module CONSTRUCTION metal c
31. S FOR FLIGHTCASING INSTALLING THE 5 REMOVING THE CONNECTOR CIRCUIT BOARD ees dog ee ee loe eee me ei o aces 6 7 REMOVING A MONO STEREO INPUT LEFT RIGHT CIRCUIT BOARD 8 9 INIERNAL EINK OPTIONS ee he oh ee 10 11 ORDERING A CONSOLE SPARE PARTS 4 ASSEMBLIES uuu SaaS Saa 12 14 FRONI S REAR PANELS u Rs eM eme peto e 15 TRANSFORMER amp 6 120 8 11 16 17 MONO INPUT CIRCUIT BOARD COMPONENT IDENT 2894 DIAGRAM nis C2894 STEREO INPUT CIRCUIT BOARD COMPONENT IDENT sss AG2937 STEREC INPUT CIRCUM DIAGRAM ses C2937 LEFT CIRCUIT BOARD COMPONENT IDENT 2 1 ea ass eee AG2938 LEFT CIRCUIT BOARD CIRCUIT DIAGRAM sheet 1 nnne nennen nnns C2938 LEFT CIRCUIT BOARD CIRCUIT DIAGRAM sheet 2 suena C2938 RIGHT CIRCUIT BOARD COMPONENT IDENT AG2939 RIGHT CIRCUIT BOARD CIRCUIT DIAG
32. UE2_MIK 188 Z 424 LEFT BALANCED OUTPUT DRIVER 17 22 3 in L_POST 47 25 A LMTR_SND 100K V DRAWING TITLE 85 1008 MANUFACTURED IN ENGLAND BY ALLEN amp HEATH DRAWING No 8 e 38 48 LEFT MONITOR METER ISSUE e 8 MONI TOR CUE SELECTOR RBS MON_L 1 33K B i S R78 18 V t 1 i Rad b REVISION BY DATE NOTES ARI 7 3 97 DRP 16 4 97 DRP 15 53 97 ORIGIN PRODUCTION L L PINS SWAPPED 1 RESISTORS MARKED ARE 1x ALL OTHERS ARE 5 174W UNLESS OTHERWISE MARKED 2 ELECTROLYTIC CAPACITORS ARE F VOLTS 274 HEADPHONE wel ce R75 K 8 2140 MIXDOWN LD3 R54 RD wA 82 8 9 1 I 1 871 sA nix Dc Top 12K Ce 338 PHONES SOCKET 1kHz TONE R69 5 ND 8K 88 t I ag B UNIT TITLE E ED DRAWING TITLE LEFT 01 IX pe MIX 3 MIX 64 MIX 53 MIX G6 MIX G MIX 08 MIX L MIX R MIX MIX R O Pee OPel O Pe 3 13 Pe P19 Pes TC BUS
33. annels by cutting out links on the rear connector circuit assembly lt Si O
34. ber feet to ensure it does not slip or scratch the work surface The control panel is angled at 15 degrees for operating convenience ALLEN amp HEATH REMOVING THE CONNECTOR CIRCUIT BOARD ASSEMBLY Before beginning any service work remove all power to the unit and disconnect any signal cables where necessary The rotating connector module must be set for desk top operation to gain access to the cover screws It 15 not necessary to disconnect the connector module from the main unit Service work is best carried out with the unit inverted on a clean work surface suitably covered to protect the mixer cosmetics Ensure adequate lighting and use the correct tools Access to the connector circuit board options can be achieved without the complete removal of the circuit board 1 Working from the rear of the console remove screws A fixing the XLR connectors to the panel and using a 12mm Nutdriver remove jack nuts B Also remove the 2 screws indicated Remove 2 screws 3 9 O 9 800 200 COG COG 90 6603 6607
35. fer to the diagram below 7 8 5 6 3 4 1 2 L R PFL ON PAN oes 270 VR14 VR13 VR12 VR11 R12 R7 R75 R74 R76 N qu 2 555 R2 R1 R72 R71 R73 LD6 118 ah O 8 8 5 gt Oleg 28 gl 8 8 TT 8 a R62 a 3 R56 C41 S7 1 81 512 510 45 513 58 58 c 8 5 5 VR16 P4 P5 P6 P7 P8 P9 P10P11P12 P13 P22 P21 P19 ALLEN 4 HEATH 10 2E 8SM Phantom Power Disable It is perfectly safe to connect non phantom powered sources such as dynamic microphones to powered XLR sockets providing that balanced leads and sources are used The 48V supply is current limited through 6 8k ohm resistors to each XLR to prevent damage However you can disable phantom power to selected ch
36. hannel 1 8 IN pin 2 hot 3 cold bal tip hot ring cold bal Stereo 9 10 19 20 IN Tape 1 8 IN 2 Track 1 IN 2 Track 2 IN Talkback mic IN INSERTS tip send ring return unbal tip send ring return unbal OUTPUTS 2 Track 1 OUT 2 Track 2 OUT Tape 1 8 OUT Cue 1 2 OUT Aux 1 4 OUT Monitor L R OUT PHONES OUT tip hot tip hot tip hot tip hot tip hot ALLEN amp HEATH pin 2 hot 3 cold balanced ring cold impedance bal ring cold impedance bal ring cold impedance bal ring cold impedance bal ring cold impedance bal tip left ring right tip sig ring gnd unbal tip sig ring gnd unbal pin 2 hot 3 cold balanced tip hot ring cold balanced tip sig ring gnd unbalanced 10dBV variable 50 to 20dBu gt 10k ohm 2k ohm OdBu 2 lt 75 lt 75 lt 75 lt 75 lt 75 2dBu 75 ohm 2dBu for stereo headphones 30 to 600 ohms 10dBV 10dBV 4dBu 2dBu 2E 8SM DIMENSIONS The diagrams below give the dimensions for flightcasing the console
37. hassis for 19 rack mount in 100 space Comprises a l6swg steel front panel housing individual channel circuit assemblies interconnected by means of soldered copper wire busbars The connectors are housed in a rotating connector module for either rack or desk mounted applications Access to the channel internal assemblies is by removal of the 18swg folded steel base Access to the connectors and power supply components is by removal of the rear cover of the connector module without the need to remove the console base The channel assemblies may be removed for servicing THE CIRCUIT COMPONENTS The MixWizard WZ 20 8 2 is manufactured using high performance industry standard linear op amp and discrete semiconductor circuit devices In particular the switches and potentiometers have proven to be durable and problem free When operated correctly the normal performance of the unit introduces no noticeable audio signal degradation AUDIO INPUTS AND OUTPUTS XLR connector inputs and outputs are balanced differential with high impedance inputs and low impedance outputs To use these with unbalanced equipment the ve signal should be linked to OV in the cable or input connector unbalanced connections are line level 3 pole TRS 1 4 jack sockets All outputs are low impedance and thus capable of driving several high impedance inputs simultaneously inputs and outputs are in phase THE PFL SYSTEM The console PFL switches send pre fade signals
38. ired should be carried out by qualified technical personnel only We are able to offer further product support through our worldwide distribution network To help us provide the most efficient service please would you quote the console serial number in any communication regarding this product SAFETY WARNING Mains electricity is dangerous and can kill Mains voltage is present within the unit Do not remove any covers with mains connected Do not carry out any work within the unit while it is powered High voltage components are insulated for safety but should not be touched with power applied The mains voltage setting is indicated on the on the rear panel next to the mains socket Check that this matches your local mains supply Check your mains wiring and earthing before switching on DO NOT REMOVE THE MAINS EARTH CONNECTION The chassis is always connected to mains earth Audio OV connects to the chassis internally Should problems be encountered with ground loops operate the audio ground lift switches on other equipment connected to the unit or disconnect the cable screens at one end Refer to the section on EARTHING in the User Guide CONTENTS INTRODUCTION SERVIGE AND TECHNICAL SUPPORT pr a ede eio eoe ia 2 MECHINIGAL DESCRIPTION aeu Ma 3 SPECIFICATIONS CONNEC TIONG un SE lan Be ONT d UE 4 DIMENSION
39. ly and service access 1 point Crosshead screwdriver 4AB 0004 2 point Crosshead screwdriver 6 ATO0002 11mm AF Nutdriver potentiometer nuts headphone socket nuts 12mm AF Nutdriver jack nuts ORDERING AN ASSEMBLY The following assemblies for the MixWizard 20 8 2 are supplied fully tested Please quote the description and order code for the part required Printed circuit PCB assemblies Mono Input PCB assembly 002 257 Stereo Input PCB assembly chans 13 14 15 16 002 258 Stereo Input PCB assy chans 9 10 11 12 17 18 19 20 002 270 Left PCB assembly 002 259 Right PCB assembly 002 260 Connector amp Daughter PCB assembly 002 261 IDC connector harnesses Mix Wizard WZ 20 8 2 26 way Master harness AL2978 ORDERING A SPARES KIT It is recommended that the spares kit order code 002 247 is held and maintained by the service agent to enable in field service repairs to the Mix Wizard WZ 20 8 2 independent of the ALLEN amp HEATH factory Commonly available items such as resistors capacitors tools and soldering equipment are not included The contents of the kit is listed below Individual spare parts may be ordered Please quote the description and order code for the part required ALLEN amp HEATH 12 2 85 DESCRIPTION ORDER CODE Fixings Screw 4AB x 5 16 Pan Pozi Black 0057 Screw M2 5 x 4mm Pozi Black AB2944 Screw M3 x 4mm Pan Pozi Black 80233 Screw x 8mm Pan Pozi Black 0073 Screw
40. pF VOLTS UNIT TITLE PRODUCTION C48 ADDED 1012 PWR WAS amp YA PAGE 2 OF 2 ALLEN amp HEATH DRAWING No Coo39 ISSUE 2 DRAWING TITLE RIGHT PCB CH CH CH CH CH 6 CH CH CH 9 CH 10 CH 15 CH 13 CH 11 CH 18 CH 16 CH 14 CH 12 CH 17 CH 19 CH 28 LAJSNI INIT 316 39606 OL 0 FIT ALL REG S VERTICAL NOTE REG 402 IS FITTED REVERSE ORIENTATION TO REG 400 amp 401 FIT REG 408 4 1 TO HEATSINK BEFORE SOLDERING TO PCB 5 CER M JIP E _ JE TOR ml o CET o ro 6 L 5 seri 0 81 2 1015 33 D 2 10719 amp HEATH SEBCONN PCE 2940 1552 61 ALLEN often 19 jo o ti Jo zig g eb Kal Rnd bid ofa Jo of erm o Cem 85 M e 2 EE s 1215 Y 22 5595 OD j NI EIN 9 29 4 M I A 5268 5 wis Gee O HOS of aiio O 4011 170 IN 17 IN I_RTM_1 G 1 90 1 27 INSERT JN E Te EB 5 Rit x gt must MICZLINEI cers 7 CI 0713 IN a 1 is SKT Z m 3 n LINE IN f 1_RTN 2A SKT21 INSERT ces l 47763
41. r BC549 NPN IC TL072CP Dual Op Amp IC NE5532N OP AMP IC LM339N Quad Comparator IC CMOS 4053B IC SSM2142P Balanced output driver AL8114 AL0328 AL2410 AL2411 AE0084 AE0085 AE0086 AE2701 AE0273 AE0031 AE0020 AE0046 AE0221 0071 0117 AE0302 13 10 10 10 1 1 OT j 10 10 10 10 10 10 10 10 10 10 10 WINI POPP O1 OT O1 ALLEN amp HEATH POWER SUPPLY Mains lead IEC 2pin EURO Mains lead IEC 3pin UK Mains lead IEC 3pin US C33 Mains Fuse 20mm T315mA UK EU Mains Fuse 20mm T630mA USA CAN Transformer 30VA IC Adjustable Regulator 783 48V DC IC Regulator 7815 15V DC IC Regulator 7915 15V DC Insulating kit TO220 Miscellaneous MixWizard WZ 16 2 Packing assembly MixWizard WZ 20 8 2 Packing assembly Flex cable 39 way 200mm Flex socket 39 way straight Flex socket 8 way 90deg ALLEN 4 HEATH 205 AL0206 ALOS23 AL0349 AL0297 0918 AE0214 AE0047 AE0048 0693 002 245 002 271 2900 AL2902 AL2901 NINININI 2E 8SM FRONT amp REAR PANELS uU MixWizavb eO INPUT 8 TRACK RECORDING MIXER MIC LINE INPUTS n ______ PAD PAD PAD PAD PAD PAD PAD PAD 30 8 3098 3098 30dB 3098 30dB 30dB pum 0 0 Z lt Z Q GAIN GAIN GAIN GAIN GAIN 50 50 PAD PAD PAD PAD JN y sla 1
42. rd can now be completely removed from the chassis When all service work is complete remove all debris such as solder component legs and wire clippings from inside the console and check your work carefully before reassembly To refit the connector circuit assembly follow the above procedure in reverse order Make sure all harnesses are correctly aligned and plugged on Test for correct operation Flexible flat cables Unit inverted with the base and connector cover removed 2E 8SM 7 ALLEN amp HEATH REMOVING AN INPUT LEFT or RIGHT CIRCUIT BOARD ASSEMBLY Before beginning any service work remove all power to the unit and disconnect any signal cables where necessary The rotating connector module must be set for desk top operation to gain access to the cover Service work is best carried out with the unit inverted on a clean work surface suitably covered to protect the mixer cosmetics Ensure adequate lighting and use the correct tools Access to the channel circuit board options can be achieved without the removal of the circuit board 1 If completely removing a circuit board assembly pull off the knobs and remove the pot nuts and fader screws from the circuit assembly to be removed The switch caps can remain in place If removing the LEFT circuit board assembly remove the nut on the headphone socket 2 Working from the front of the mixer remove screws and nuts A fixing the base cover to
43. the front panel 52 gt 95 s hv 262 3 With the unit inverted remove the 2 remaining screws in the base cover remove the base ALLEN 4 HEATH 8 2E 8SM Access to the input channel circuit board options be achieved at this stage by carefully cutting and resoldering the link options as necessary It is not necessary to completely remove the circuit board assembly to change the options Refer to the section INTERNAL LINK OPTIONS for more details To completely remove a circuit board assembly 4 Identify the circuit board assembly to be removed and then cut the buss wires half way between each circuit board Disconnect the flexible flat cable C plugged into the connectors mounted along the edge of the circuit board If removing the LEFT or RIGHT circuit board assembly the ribbon cable D and flexible flat cable E will have to be carefully unplugged as well 5 The circuit board can now be removed When all service work is complete remove all debris such as solder component legs and wire clippings from inside the console and check your work carefully before reassembly To refit the circuit assembly follow the above procedure in reverse order Make sure all harnesses are correctly aligned and plugged on Test for correct operation w Buss wires Unit inverted with the base and connector cover removed Cut each wire
44. use rating INE STEREO INPUTS NORMAL MIG LINE INSERT REV MIXDOWN TAPE INSERT RL insert 19 20 17 18 15 16 13 14 F 9 10 L MONO um s 6 INSERT OSC INSERT IN IN 8 7 8 TRACK TAPE SENDS aux4 aux3 EFFECTS SENDS POST FADE SENDS POST MONITOR CUE SENDS PRE FADE MON TOR SENDS PRE ING THIS APPARATUS MUST BE EARTHED XLR 9 XLA EN O TP LINE IN OUT T F HIGH VOLTAGE INSIDE 4 DISCONNECT AC MAINS INPUT BEFORE REMOVING COVER cp SET FOR MAINS VOLTAGE REPLACE FUSE WITH CORRECT TYPE AND V AC 50 60Hz 35W o rs NBER T630nA 20nn dE nn BY ALLEN amp HEATH ANATIONAL INDUSTRIES LTD WZ 2682 sa c INPUTS C
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