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ALESIS QUADRAVERB II SERVICE MANUAL V2.00 12/12/95

Contents

1. sui cid 06 250 2 B 022 023024025 LCD RE RIT SZ 052 R123 R122 059 C62 820 1 uzak ds E FUNCTION BD 2 25 R35 718 713 2 X 714 CODD om CORP PCB ny Alesis QuadraVerb Il 2 00 H 6 07 19 06
2. q cis 470v Alesis QuadraVerb Il 2 00 REVISION RECORD U28H U28D LIR ECO APPROVED DATE 3 Tet sol m is Z4HC14 cia i 4BKHZ diodes 11 3 93 DATA 00 07 lt ADDR 00 15 Arev ut x to x di 5 ADDRO VE 02 1 30 31 32 e IN ADDED THS 1 53 3 02 ADDROA 842 1 55 Ei a rome gt 2 5 NCADDRD ee Ves DI ADDR 5 ADDROS aA 5 MADDR B 3 ADDR G 1 67 1 1707 02 ADORI4 29 e appro 3 143 1708 22 DATA07 Z 9 1758 53 IN ADDRIA 28 el aposo8 NAR Qa N ADORIZ 4 i 0009 ZERO vec 128 m s 5 3 ADD308 25 05 BIN appr 2T io Q5 39 ADD307 Aborto 23 55 S N ADDRI 57 ADOROS 28 be NADDRIZ 2 AD 7 ADORO 2 5 0087 ANTI ur ADORO B ADDR A MEA ct ADOROE x Naz 27 V ADDR S 7 p WR 223 E Nappo ne si 20995 ADDROS ADDROZ 10 s ADDR01 T Janar 12 or cr FBMEM 2 E n gt 21 eR i3 744800 9 3 n ad gt 8MEM
3. 1 REVISION RECORD VN m LTR ECO NO APPROVED DATE L a IR A J288 U28E U28F 8420 2 Es fo 13 r Ul A OfuF 1 E 74HC1 74 14 N 4BKHZ cxt U diodes 1 3 93 as lt DATAIDO 071 ADDRIOO 151 c62 di 4 c 5 ut via ai IL ro wol DAL paese E tt DATADO 1 4 tao RESI 1 01 n 1 ADDRO 914 2 DATAS ADDR 9 12 Enc a 27 1 ADDRO EJA 92 DE 2 zN appre 493 DIS ENC B 2d 1 zc 1 39 31 DD TIA 782 DATADS Z Z N ADD32 7 72 AB ENC SW Nee E ADORI E 5 704 E dA 404 SN anpra 6 1 06 H p seo 4 no coli rove madas 7 parage EN aa 5 1 88 DE BRIADS E ijo poz 31 52 2 A Aonrie 29 ABBRO 3188 752 Z S ADDSDZ 3 78 2 0 93 Spia 39 DATAGI 6 22 93 32 CORDE ADDR 28 Aii N ADDROR 25 a 2 P04 3 GAT ABE TATS sms an ri H2 ADDR NADDR A im 07 21 BATAQ7 ADDR09 24 49 vec 28 vec 28 e CH Pte HEBA ABRAN RATAS 7 05 ce HS ADDRIT 28 A 97126 DATAQ ADDR A 2742 pos 3 garage 8 0 o 2
4. RIGHT MONO IN 12 RIGHT INPUT i 6 R56 1K VA ANN xz 4T Oe c79 gt 4 7 1000pF R96 J 5v t R30 15 5 4HCUDA4 6 85F 74HCUO4 he 74 4 U19G 7 R39 F tu 100K gt rao 3 3K C35 22 N 3307 041 013 C36 lt omo 1500pF T c38 T 5v 1 AAA 1 3 5 2 I ae lt 4 74HCUC n 1_ 13 74HCUD4 U24GZ9 R27 u C66 li Alesis QuadraVerb Il 2 00 820 R29 4 44165 96 DATAO7 58 2 19 bz EOPTOU ADDRIOO 031 NDATADS s6 NDATAOS 3709 DATAO4 38 D4 3 DATAOS 3904 DATAO2 40 03 54 41 02 51 42 bi ADOROS 80 ADDR02 AS 77 ADORO 541 72 290155 75 RD D 22 9 RD T 76 27 26 A M 35 ANN 8 25 57 EXTAL EH 55 20 52 RESET DR 55 21 WORDLEN 57 18 laskin E A D DUT wen Hie 18 p2co_iN RAS 14 ovco cas 8 2 t E 10 DAC 22 2 BMH lt 5 12 288MHZ DAC2 5y 4BKHZ 4 48 7 pacs 50 30724 3 TEST DACS HT NE TES
5. 06 L8 DATAOR npe k 35 gt BATAOL 7 a7 2 27 INABDROS 26 25 DATAO4 ADDA DEN aa ADY 9 54 fur apy ADDROE 2749 ba 17 26 is ol ER 74 573 40007 S 8 B3 ADDA Te Tl caz ALE ADDROS 51 4 22 JA para of TO WE SS 98 CONSE oo Hte 26 22 die SES LIE 383121 012 anoo Bao 23 56 A Y se ADOR S L EA 25 __ADOROY HN27C101A6 f2 tal m MEM 221 24 ADORON 24 22 46 27 gt 45V IM p ADDRIOO 151 cose 02 312 usa 07 ROCH 2 RAMP gt m 5 TRETO 2 2 AAA YES VN at BYPASS Ti 10K 4 350 d 22pF ANA euty amp X 744010 TOM RP AA 220 u5 Lids RZIANA 2720 1 7 i A R24A AA 270 ADDRO22 DATAOO U1 colte V VV ATAD 3 109 rds 328A AA 220 EI DI ADDROA va lola 44022 92 He R26 A A 220 4 n 24 L LL rsp M no UD Hus E o NN VW m lt Rig reset Us ijo BMA A A220 4 220 220 Sto gt gt m 44 L gt us it 3 31109 95 1 32 270 3 0 7 lt tdesx i LE N THRU OVI ve APT 5 a IE eS gros 4 C oS ADDRO4 578 5 5 LM DI 400R48 6 lt n VN E SWITCHE
6. 6 2 2 10 500 10 CHAMBER 1 type 4 subtype 4 decay 1 1 1 1 dampingho 1 2 1 9 1 reverb density 2 1 1 9 1 diffusion input high freq roll off 3 1 2 200 20000 150 LEE mix direct lt gt 4 2 1 rq MT 161112 150 10 release 6 2 2 jio 500 0 ROOM 2 type 4 subtype 5 decay 1 1 1 1 9 1 1 1 9 1 o 9 1 reverb density 2 1 diffusion 212110 99 i input high freq roll off 3 1 2 200 20000 50 predeay 4 h 5 i mix direct lt gt dy 4 2 1 1 reflectionlevel 5 1 1 i 5 1 1 reverberation 6 1 1 9 1 Se gatedievel 7 21 1 7 8 1 50 10 release 8 Jo 500 10 2 type 4 subtype 6 dampnghi 4 2 1 E aisn predelay reverberation swirl 6 7 Alesis mide Verb Il 2 00 EL 07 19 06 1 gate hold 8 1 10 release 8 2 2 10 50 99 lp 5 r reverb density 2
7. RI 10K RIGHT OUTER LEFT INNER SIL 8 REVISION RECORD i LTR ECO NO APPROVED DATE TO J6 AB INPUT LEVEL 7 8 SL ENCODER sw TERM A ENC A COMMON SW2 T TERM B 7 7 u H ENC 8 10K 3 RIGHT OUTER EFT INNER 4 n 5 SW 1 SIL 6 I I I SW PUSH den l 6 1 5 E I I T0 47 AB OUTPUT LEVEL d COMPANY S S TITLE Em QUADRAVERB I INPUT OUTPUT CONTROL WIRING NATE LEE 2 18 93 CHECKED DATED CODE SIZE DRAWING NO REV QUALITY CONTROL DATED B 0 4 5 2 X B RELEASED DATED SCALE SHEET 4 OF Alesis QuadraVerb Il 2 00 H 5 07 19 06 8 30 Revision A Component 1 D n3 JES NL 020 R88 R4 w oe 48K IN 85 non MUN 03 AI au gr ya READ e Jl BYPASS
8. 8 40 Revision C Component 1 D Jj OUI 1 d 8 OUT OPT IN C85 C60 mun S 06 LI RE U24 4 SJ 5 gt 48K IN R44 R84 180 R88 a J14 VU LEDS J2 MIDI OUT MIDI IN C Alesis QuadraVerb II 2 00 07 19 06 Alesis QuadraVerb Il 2 00 a 07 19 06
9. HEATSINK Q2 S4 S6 PCB PCB SWITCH Q2 PCB PCB POT Q2 BEZEL DISPLAY Q2 BUTTON POWER Q2 S4 M4 FRAME POT Q2 KNOB STANDARD Q2 KNOB CONCENTRIC UPPER Q2 PLS KNOB CONCENTRIC LOWER Q2 KNOB VALUE Q2 EXTENDER SWITCH Q2 POT 10KA DUAL CONTROL 0 09 1033 POT 10KB DUAL CONCENTRIC ALPS RK1612220055 10KBX2 DZ RES 0 00 0221 RES 220 OHM 1 8W 596 0 05 0200 RES 2 OHM 1 2W 596 1 50 0100 CAP 10 PF NPO 1206 SMC 1 50 0101 CAP 100 PF NPO 1206 N C28 C46 48 oC O 1 1 1 1 1 1 1 1 1 1 1 1 50 0102 1000 1206 9 MAIN C6 C14 15 C17 18 C57 C78 80 SEE 418702 FOR MOD INST 0 0 0 70 2 2 7 Olr r 3 I DIN WM __1 50 0103 0 01 MF NPO 1206 2 C50 052 CAP 1500 PF NPO 1206 50V CAP 22 PF NPO 1206 N C7 C8 35 SMC CAP 27 PF NPO 1206 2 5 05 CAP 33 PF NPO 1206 5 MAIN C40 41 663 64 C66 SMC CAP 0 033 MF NPO 1206 SMC CAP 68 PF NPO 1206 2 969 C74 1 0 21 CAP 6 8 PF NPO 1206 094 1 SMC 1 51 0104 CAP 0 1 MF X7R 1206 MA C3 C5 C11 12 C25 C27 C32 C37 C42 45 C54 55 C59 61 C67 C70 72 C81 85 SMI 2 64 0138 IC 74HC138 DEMUX DEC SMD 1 MAIN US gt gt gt Z Z are SMI C 74HC573 OCTAL D LATCH S 1714 MAIN U10 11 U25 __ N U23 MAIN MAIN MAIN MAIN MAIN MAIN C H
10. EF i 4 00 0001 JACK 5 PIN DIN MIDI 2 MAIN J2 4 00 0004 JACK 4 PIN DIN P4 1 MAIN J m 402001 JACK 1 4 MONO CLIFF 1 1 2 14 409001 14 4 _ MAN 14 9441113 _ 3 02 0014 LED RED T1 HP HLMP 1340 12 14 LT 7511098 114 e ME 192001 JVARICAPMVAMB8 MOT 2 9 ppbtt 2 1 ME 201408 DIODE POWER 1N4003 4 9 D6D810 2 ME 201540 DIODE POWER 1N5400 4 o ME 6020002 SWITCHDPDT 1 o ME 701009 CRYSTAL12MHz 1 ME 701001 _ CRYSTAL 6 144 MHZ SERIES 1 MAN 1 ME 705008 BATTERY3VLTHUMPANASONC 1 1 ME 720006 INDUCTOR 0 68uH 0 5 CTR MAN 2 1 ME 7200018 NDUCTORO15uHO CTR Li G Pat Description jJRefDesignator Alesis QuadraVerb Il 2 00 G 1 07 19 06 TRIP PVC 159mm X 7 5mm Q2 TRIP PVC 203mm X 6 5mm Q2 TRIP 7 x 185mm TRIP FOAM SIDE 7x95mm D4 9 00 1010 ENCODER DATA ALPS EC11B 9 02 1007 RACK EAR CURVED FRONT PANEL LUG SOLDER PCB MNT MTL PANEL FRONT Q2 MTL PANEL REAR Q2 MTL CASE Q2 9 13 1028 9 13 1029 9 23 1014 9 23 1017
11. 0 Parameter 1 Parameter 2 hae Parameter 33 If TT 2 01 o Block 1 left Block 1 right 6 Block2 inmix ai Block 8 right Alesis QuadraVerb Il 2 00 E 8 07 19 06 If TT 2 10 O JjDirectlevel 3 jBlok20utlevel 3 Block 2 inmix level Block 8 inmix level Master fx level BLOCK PARAMETER DEFINITIONS These parameters are packed as 8 or 16 bit words MSB first in programs but are always considered 16 bit words LSB first in parameter edits EQ LOWPASS FILTER type 1 subtype 0 BANDPASS FILTER type 1 subtype 1 HIGHPASS FILTER type 1 subtype 2 highpass fc LOWPASS SHELF EQ type 001 subtype 3 lowpass Br Its qs 42052 200 10 7 1 BAND HIGH PARAMETRIC type 1 subtype 5 Alesis QuadraVerb Il 2 00 E 9 07 19 06 STEREO SIMULATOR type 1 subtype 14 degrees E 1 1 jo J9 T Alesis QuadraVerb Il 2 00 E 10 07 19 06 speed eedback mi o D lt He ri m BE 2 c Il o 5 S 19 gt JJ O E 2 ER e 2 subtype speed eedback redelay chr1 Il N speed eedback redelay chr1 chr2 redelay chr3 chr4 lt O E gt 2 2 GO zZ ke Il speed epth eedb
12. TYPE DATA FORMAT Alesis QuadraVerb Il 2 00 E 25 07 19 06 The number of Type parameters and their location depend on whether the selectted block is defined or off The Type parameters are not packed This results in unused bits for most parameters These bits must remain at 0 For direct parameter editing sysex command 01H the Page and Parameters are given in the table below Function should be set to 3 Type and the Blocks should 1 8 For blocks that are off Parameter name Page Parm lo lim hi lim bits address 0 Block type 1 1 0 4 8 0 7 0 0 1 Block move source 2 1 1 8 8 1 7 1 0 2 Block move destination 2 72 1 8 8 2 7 2 0 3 Block copy paste 3 1 0 1 8 3 7 3 0 For blocks that are defined X Parameter name Page Parm lo lim hi lim bits address 0 Block type 0 4 8 0 7 0 0 1 Block subtype 2 4 0 8 1 7 1 0 2 Block move source 3 1 1 8 8 2 7 2 0 3 Block move destination 3 72 1 8 8 3 7 3 0 4 Block copy paste 4 1 0 1 8 4 7 4 0 The high limit depends on the block type see the table Block subtype definitions BLOCK TYPE DEFINITIONS This table defines the block types for a given parameter 0 E Alesis QuadraVerb Il 2 00 E 26 07 19 06 BLOCK SUBTYPE DEFINITIONS These tables define the block subtypes for a given parameter Different block subtype tables are defined for each block type Type EQ 0 jLowpassfiler 6 jHighpassshelfeg 8 3 Bandparam
13. 1 DIO 2 02 5231 DIODE ZENER IN2281B J17 BUTTON 6 MAIN J14 HDR 415 1006 HEADER 6 PIN SIL 2MM CTR SHROUDED 1 jj 415 1006 HEADER 6 PIN SIL 2MM CTR SHROUDED 1 JJ3 MAN HDR 415 1008 HEADER 8 PIN SIL 2MM CTR SHROUDED 1 HDR 415 1008 HEADER 8 PIN SIL 2MM CTR SHROUDED 2 MAN sia dis MAIN j HEADER 8 PIN SIL 2MM CTR SHROUDED 1 spo eo ns HOW 5 00 0016 SCREW6 32x1 4PPZNC o 4 JPCB 9HEASINK HOW 5 00 0020 SCREWM 3x7mmPHILSLOT 1 9 v J CASEE 7 HDW 5 00 1005 SCREW3x6MMKEYPAD 1 JOPIACLJACK BL 0 0 j HDW 5 00 2005 SCREW 2 6 x 6 KEYPAD JBUITONCB HOW 5 00 2005 SCREW 2 6 6 KEYPAD 4 HOW 5 02 6320 NUT KEP 6 32 IC 2 117805 REG 7805 5 220 NATIONA IC 2 13 7812 REG 78112 12V TOO2NATION t IC 2 13 7912 REG79L12 12vTO92NATION 1 2 24 0138 IC 6 138 OPTOISOHEWLETT MA IC 2 27 0022 ASIC DIG FX PROCESSOR 84 PINDSP1 1 _ 4 IC 2310059 CSOFTWAREEPROMQ2 Ve201 JUM JAC 4000001 JACK amp PINDIN MID NAN peso Group AlPartNo Description ty HRetDesigaor Comet 1 Alesis QuadraVerb 1 2 00 G 4 ei 2 2 2 2 2 2 2 lt lt lt gt gt gt gt z ziziziziziz C48 67 69 75 78 C14 C31 C
14. 1 diffusion 2 2 predelay 4 1 E EN 1 SET 99 99 1 99 1 2 1 2 99 1 99 99 99 7 2 9 1 500 release 8 2 500 10 CHAMBER 2 type 4 subtype 8 decay 1 1 1 99 1 dampingh_ 1 2 1 0 9 113 1 0 1 reverb density 2 1 1 h diffusion 1 J mix direct lt gt dy 4 2 1 11 99 h reflection level 5 1 1 h spread 7 5 2 1 reverberation attack 6 1 1 h Eg gatedievel 7 2 1 9 h gatehold 8 1 50 10 release 8 10 500 10 5 1 1 10 10 1 1 1 1 1 0 1 1 1 1 1 1 10 10 LARGE PLATE type 4 subtype 9 1 gt i dampinghi 1 2 9 HO 88 reverb density 2 1 99 diffusion 2 2 1 9 input high freq roll off 3 1 4 reflection 5 1 spread 5 reverberation swirl 6 gatetig 7 1 i i i 1 i 2 1 1 2 20 20000 50 T i 1 i i L 151 j 10 0 I I r i 1 1 1 1 2 3 predelay 4 99 i 5 9 5 9 9 7 2 1 Alesis QuadraVerb Il 2 00 E 37 07 19 06 ated level ate hold zu l 2 70 A
15. 5 5 dB 5 0 dB 4 5 dB 4 0 dB 3 5 dB 3 0 dB 2 5 dB 2 0 dB 5 dB 1 0 dB 0 5 dB 0 0 dB Alesis QuadraVerb Il 2 00 E 18 07 19 06 10 20 V2 0X Version 2 0X 6 26 95 SYSTEM EXCLUSIVE FORMAT The QuadraVerb 2 MIDI System Exclusive message format is as follows FO System exclusive status 00 00 OE Alesis manufacturer ids QuadraVerb ids cc Opcode Data F7 End Of Exclusive OPCODES 01 MIDI Edit FO 00 00 OE OF 01 lt function gt lt block gt lt page gt lt parameter gt data F7 function 0 PARAMETER 1 MIX 2 GLOBAL blocks 1 8 of block to be edited Doesn t matter for GLOBAL edits lt page gt 1 of last page under function page for value to be edited lt parameter gt 1 of last parameter on page parameter of value data is in format described below lt is a 16 bit value which is transmitted in three MIDI bytes LSB first TWO QUADRAVERB 2 BYTES 0 A7 5 4 A2 1 LSB 1 B7 B6 B5 B4 B3 B2 BO MSB TRANSMITTED AS 0 A7 A5 A4 A2 Al 1 0 AO B7 B6 B5 B4 B3 B2 2 0 Bl 0 0 0 0 Editing of a flashing TYPE parameter should be followed by an ENTER MIDI sysex message 0B 02 MIDI User Program Dump FO 00 00 OE OE 02 lt prog gt data F7 lt program gt 0 99 selects individual user bank 0 programs 100 selects edit data is in a packed format in or
16. C33 R37 and R38 C68 C71 C72 and C73 are the bypass filters for the internal voltage reference C44 along with R49 and R52 act as filters for the negative and positive internal DAC reference inputs Analog power is supplied through current limiters R53 and R91 which help suppress current spikes C76 C42 and C43 act as bypass filters for the analog supply The digital supply is filtered by C45 C77 and R2 R54 is a current reference and has a tolerance of 1 for precision The A to D s stereo output is transmitted from the A D IN line to the DSP chip U6 4 20 Digital to Analog The digital to analog converter is U12 which is an AKM 4318 DAC Like the A to D this D to A is a high performance over sampling stereo device It can achieve an outstanding signal to noise ratio of 98 dB which is unprecedented in it s price range Also the over sampling nature significantly reduces output filter requirements The analog power supply filter consists of C59 and C81 while the digital is supplied via resistor R78 and is filtered by C53 and C55 It s bit clock which is 3 072MHz is buffered by nand gate U23B The D to A outputs are balanced and routed through differential amplifiers to the unit s output jacks via the analog output section see sec 3 20 Alesis QuadraVerb Il 2 00 3 07 19 06 5 00 Digital Signal Paths 5 10 The 8031 The 2 5 operation is directed by U8 which is the 8031 micro controller It has an internal clock ge
17. CAB 4191302 j CABLESILEPIN225MM2MM 0 0 0 1 T 14 CAB 4191332 CABLESILEPINCOAX225MM 0 31 11 CAB 4191333 JCABLESILEPINZOMM 1 1 CAB 419 1334 CABLESILEPIN OMM 1 114 CAP 1070001 jCcAP100MFELECTOV 1 CT CAP 108001 CAPIOMFELEC toV 5 MAN C2 C53 56 058 062 7 0 CAP 108005 CAP1OMFELECIOV 1 1 1 2 0 2 I CAP 1090022 22 25 2 MAN 9 es est C CAP 1090475 CAP 4 7 UF ELEC 50V 20 1 4 10 cie 26 CAP 1090476 25 4 C68C73 07677 CAP 1100471 CAP470UFELEC35V02CTR 9 fca 01802021 CAP 1401000 CAP 1000UF ELEC 35V0 2CTR 5 C9 C19 C22C24C51 CAP 10 PF CERDISC 1096 50V 1 9 sEEEC0418702FORMODINST CON 404008 CONBNC WAKA 1 2 CON 411001 05 o HDR 414006 HEADER 16 PIN 0 1 DILXR M 1 10 1 J5 MAIN J1 BUTTON HDR 4151005 HEADER 5 PIN SIL 2MM SHROUDED 1 7 J16 MAIN J1 POT J14 J15 MAIN J2 POT en il HDW 500006 3 SCREW632x14PPZNC PCBS HEATSINK 1 HDW 500000 5 3 7 67 Tof HDW 5001005 SCREW3x6MMKEYPAD 1 HEATSINK 2 270022 ASICDIGFXPROCESSOR84PINDSPT 1
18. Dv 1 50 0680 CAP 68 PF NPO 1206 2 64 0573 74HC573 OCTAL D LATCH 5 MI 2 64 7410 IC 74HC10 TRIPLE 3 IN POS NAND GATE MI 2 64 7486 IC 74HC86 QUAD 2 IN EXOR S 2 66 5160 HM514260AJ 7 DRAM SMD MA MA 2 67 0257 32K x 8 SRAM HS SMD 2 70 8031 80C31 MPU PLCC SMD 2 71 0084 IC TL084 QUAD OPAMP SMD 2 75 4319 IC AK4318A DUAL 18 BIT DAC MA 2 75 7360 SAA7360 ADC PQFP 44 SMD MA 2 50 4148 DIODE SIGNAL 1N4148 SMD 2 51 4401 TRANS 234401 NPN SMD E z z z 2 51 4403_ITRANS 2N4403 PNP SMD MR 0 10 0047 RES 4 7 OHM 1 8W 5 1206 0 10 0100 RES 10 OHM 1 8W 5 1206 Jnn EE DID MA MA MA 0 10 0101 5 100 OHM 1 8W 5 1206 0 10 0102 RES 1K OHM 1 8W 5 1206 0 10 0103 10K OHM 1 8W 5 1206 0 10 0105 RES 1M OHM 1 8W 5 1206 0 10 0123 RES 12K OHM 1 8W 5 1206 42 NW EE DID 42 EE DID on 0 10 0203 RES 20K OHM 1 8W 5 1206 DID 0 10 0222 RES 22K OHM 1 8W 5 1206 7 RES 270 OHM 1 8W 5 1206 0 10 0393 RES 39K OHM 1 8W 5 1206 1 s 0 10 0471 RES 470 OHM 1 8W 5 1206 RES 4 7K OHM 1 8W 5 1206 8 0 10 0473 RES 47K OHM 1 8W 5 1206 0 10 0474 RES 470K OHM 1 8W 5 1206 R RES 510 OHM 1 8W 595 1206 on M A MA NW DID 42 lt DID n 0 10 0512 RES 5 1K OHM 1 8W 591206 8 0 10 0514 RES 510K OHM 1 8W 5 120
19. Eight MIDI bytes are used to transmit each block of 7 QuadraVerb Il data bytes If the 7 data bytes are looked at as one 56 bit word the format for transmission is eight 7 bit words beginning with the most significant bit of the first byte as follows Alesis QuadraVerb Il 2 00 E 1 07 19 06 SEVEN QUADRAVERB Il BYTES AT A6 A5 A4 A3 A2 Al A 7 B6 B5 B4 B2 Go C5 C4 C3 D7 D6 D5 D4 D3 D2 E7 E6 ES E4 E2 F7 F6 F5 F4 F3 F2 G7 G6 G5 G4 G3 G2 Ore OUT Q tj Ed Aa wW Q d E O UJ C CO 200 C CO CO c TRANSMITTED 5 CO CO CC CD OQ N O There are 306 data bytes sent for a single program dump which corresponds to 256 bytes of program data With the header the total number of bytes transmitted with a program dump is 314 The location of each parameter within a program dump is shown in the next section QuadraVerb Il Program Data Format 03 MIDI User Program Dump Request FO 00 00 OF 03 lt program gt F7 lt program gt 0 99 selects individual user programs 100 selects current edit 101 is a dump all request in which all user programs are dumped as individual program dumps 02 followed by a global dump 07 When received the QuadraVerb Il will respond to this message with a MIDI user program dump 02 of the program number selected 07 M
20. Note that the Revision E Main PC Board incorporates a new custom digital VCO IC UX 5 30 MIDI Hardware MIDI protocol is a standard that all manufacturers follow when designing MIDI systems so that electronic music products can communicate via a common protocol MIDI IN is provided by J8 The opto isolator U9 prevents unwanted electrical interference and is required by the MIDI specifications as is R18 and D3 U9 s output is sent to the 8031 s RXD port pin so that serial MIDI information can be deciphered R22 provides a current source for the opto while R21 acts as a pullup J2 is the MIDI output jack and is driven through R17 by inverters U4D and UAE which are buffering the 8031 s TXD port R14 is a pullup resistor Alesis QuadraVerb Il 2 00 6 07 19 06 5 40 Encoder Interface U27 is a quad XOR gate package which conditions the outputs from the front panel encoder such that they can be easily interfaced to the 8031 U27A is a transition detector pulse generator One input is routed directly to the encoder while the other is delayed by an RC time consent of R123 and C52 R122 is a pullup resistor U27C is an identical transition detector pulse generator It s output is used to clock D flip flop U20B which produces an output that allows the 8031 to determine if the encoder is moving in a clockwise or counter clockwise direction U27D is used as an inverter since one of it s inputs is connected to 5V It s output is used to reset the
21. Triggered Panning Triggered Mono Stereo Flanging Soft Hard Overdrive Block Copy Paste Advance and Bypass pedals as local modulation generators 100 more user programs Negative flanger feedback Block Bypass Improved Stereo Leslie with Linear Circular mode Quick routing when a block is added LFO local modulation generator DIG indicator flashes when digital input not valid 2 The MIDI sysex additions are MIDI EDIT Block Type can be edited The MIDI Global Dump accommodates the larger footswitch range An ENTER command User Bank 1 dump and dump request Block Bypass dump and dump request MIDI program table dump and dump request 10 23 95 2 01 Checksum D9ABH 1 The test constraints to determine if the sampling hardware mod is working have been loosened This corrects the hardware problem that is causing SAMPLE HARDWARE UPDATE NEEDED error messages allowing units allowing units with the VCO chip mod to sample pre VCO chip units still work 2 The test for the sampling hardware mod has been added to the self test routines 3 The footswitch local generator won t retain modulation after power down 4 If adding quick routes causes a DSP FULL message the display is updated immediately to not show the routes 5 On power up the FX RAM DRAM is completely cleared so quick power cycles won t cause stuttering audio remnants to play 6 The program bank selection by c
22. lt lo _ Qo ate hold release KO e 1 e eo eo eo 1 N N o O Ojo O O O O 26 m gt 2 A Il N ate hold time everb density mix direct gt dly 2 m lt 2 Cp A ROUTE POSITION DEFINITIONS Alesis QuadraVerb Il 2 00 e Q e e 07 19 06 Route position byte 9bits Sroute 4 Sblock 1 34 Dblock 1 where Sroute route source 0 Input L 1 Input R 2 Block inmix 3 Block mix 4 Block L 5 Block R Sblock route source block 1 Input 1 Block 1 8 Block 8 Dblock route destination block 1 Block 1 82 Block 8 9 Out L 102 Out R ROUTE LEVEL DEFINITIONS Below is a table that gives the corresponding dB level for a given route level 0 OF 42 0 dB 38 0 dB 36 0 dB 34 0 dB 32 0 dB 31 0 dB 30 0 dB 29 0 dB 28 0 dB 27 0 dB 26 0 dB 25 0 dB 24 0 dB 23 0 dB 22 0 dB 21 0 dB 20 0 dB 19 5 dB 19 0 dB 18 5 dB 18 0 dB 17 5 dB 17 0 dB 16 5 dB 16 0 dB 15 5 dB 15 0 dB 14 5 dB 14 0 dB 13 5 dB Alesis QuadraVerb Il 2 00 E 39 07 19 06 12 5 dB 12 0 dB 11 5 dB 11 0 dB 10 5 dB 10 0 dB 9 5 dB 9 0 dB 8 5 dB 8 0 dB 7 5 dB 7 0 dB 6 5 dB 6 0 dB 5 5 dB 5 0 dB 4 5 dB 4 0 dB 3 5 dB 3 0 dB 2 5 dB 2 0
23. which supplies the SRAMs to be at 5V Without D7 the SRAM supply would be below the address and data voltages which would cause the SRAMs to malfunction U3 is also powered from the SRAM supply voltage 5MEM and it serves to decode and chip enable the SRAMs 5 20 DSP The heart of the Q2 is U6 it s custom VLSI audio DSP ASIC which handles all data processing requirements timing for the A D and D A converters DRAM interface control and optical input output communication protocol The chip was designed specifically by Alesis engineers with the intent of providing the new standard in state of the art multi effects processors The DSP chip is programmed by the host 8031 microprocessor and the interface consists of the 8 bit data buss 4 low order address bits RD WR and FX CS which is the ASIC s chip select Convincing signal processing requires large amounts of memory to implement long delays in order to achieve excellent sonic results For example in this case we wanted to achieve a maximum delay of about 5 seconds With a sample period 20 microseconds 48KHz sample rate this would equate to nearly one quarter of a million samples This is accomplished by utilizing U21 which is a 16M DRAM arraigned as 256K words of 16 bits each It s interface consists of a 16 bit data buss a 9 bit multiplexed address buss and control signals RAS CAS and WRN The digital I O package J9 is a fully integrated transmitter and receiver device It takes
24. 24b 25 26 49 50 51 52a 52b 53 Mod 1 source Mod 1 target block Mod 1 target type parameter route or mix Mod 1 target Mod 1 amplitude Mod 2 source Mod 7 amplitude Mod 8 source Mod 8 target block Mod 8 target type parameter route or mix Mod 8 target Mod 8 amplitude 0 99 129 11 0 KKK 99 129 99 129 11 0 KKK 99 8 8 2 eek 6 8 8 8 2 eek 6 8 22 1 22 0 23 7 23 0 2 24 7 24 6 24 5 24 0 25 7 25 0 26 7 26 0 49 7 49 0 50 7 50 0 51 7 51 0 2 52 7 52 6 52 5 52 0 53 7 53 0 Definitions of the modulation sources are in the section Modulation source definitions Target block definition 1 block 1 8 block 8 9 left out 10 right out 11 mix parameters Definitions of the modulation targets in the section Modulation target definitions BLOCK MIXES 54 55 56 57 68 69 70 71 Direct level Block 1 level Block 1 inmix level Block 2 level Block 7 inmix level Block 8 level Block 8 inmix level Master effects level LOCAL GENERATORS 72 73 74 75 76 77 78 79 80 Generator 1 type Generator 1 trigger source channel Generator 1 attack threshold Generator 1 release threshold Generator 1 attack time Generator 1 release decay time or period Generator 1 input gain Generator 1 envelope hold time Generator 1 footswitch source Alesis QuadraVerb Il
25. If this modification is not performed when upgrading the software will display UNIT NEEDS SAMPLING UPGRADE any time the sampling configuration is called up EA Sampling t i Modification Scrope Solder Mask from Traces add 24AWG d Seu Exc mn gt fn VR gauia s Emm v E naat emm mr c AN S BEBE m ue AL 3 Diagram 7 Alesis QuadraVerb Il 2 00 A 7 07 19 06 6 17 Revision amp C VCO Changes Rev A amp C VCO Changes This update eliminates clock jitter that can cause some crackling sounds when using digital Note that this modification can only work on units that have software version 2 01 or higher and thus should only performed on older units if there is a specific complaint of Dig I O noise Alesis QuadraVerb Il 2 00 A 8 Diagram 8 07 19 06 7 00 Appendix 2 Test Procedures If possible user data should be saved a DataDisk is recommended prior to any servicing This of course may not always be possible i e dead power supply bad reset signal corrupt data etc Saving user data may also be accomplished after unit functionality is restored i e power supply or reset line is repaired and prior to further servicing and testing The unit should always be reinitia
26. P 28 57 BAQL 90 47 LRCK 3 oro u22e 7 LF 347 36 perl un DIF os ne 7 cri c72 18 xr RIGHT MONO IN ATF lt 1 LEVEL je RIGHT INPUT du s I ces H REO 58 R56 1K i E 222 19 VV V V VN VVV 3 8309 XSYS2 20 ew Te N 1 Spon AQUIR 11347 Beware 7 2 7 P 28 V FINE 20K 57 tok tx a E WV j 25 4 NEZ 5 t RIGHI 009 NES OUTPUT LeveL Rios 10K fx BAOR NGA POT NES AR amp E N BAR 2 z 6 v L 8 8 E lt 37 pal 7350 9 E Ed 5 X AAA bV ato ot 39K 510 A 2 4 4 D Kev Yer uf ANN Les lt 74HCUO4 OPTICAL IN SND 7 45V 57 20 poder odio a D 5 5 5 VVV BI tor openga our N 4 00 59k x E 23 44 65 74HCUO4 6 74HCUO4 74HCUO4 OPTICON a A AAA us ANI Vs IL s Ras R42 SL EOPTOUT E 100x 100K lt 22 ADORIO0 03 7 2 3 54 74He rom cas A ED g a EDIO IS 527 Rio Fao S d E gt 25 ph K 24440 c ED lt V C40 2 lt gt m SI vanto 2 EDS 9 amp K E spora W F Fou 563 FX CS a L 12v 4 RM E lt
27. R65 to the inputs of op amp U26D which is configured as a differential amp with R55 and R59 setting the gain to two C28 and C46 act as high frequency attenuators Note that single ended mode occurs when a mono plug is inserted into the output jack The output of op amp U26D is routed through a DC blocking capacitor C26 and is then scaled by the output potentiometer for proper output level Op amp U18C and U18D are the left channel s output amplifiers and have 6dB when single ended mode is selected on the output jack This is accomplished through a series of input and feedback resistors R68 R67 R99 R104 R105 R98 R15 R77 R69 and R74 The output jack is terminated with R106 and R107 along with C80 and C15 to ensure amplifier stability The right output channel is identical and is built around op amps U26D U18A and U18B Alesis QuadraVerb Il 2 00 2 07 19 06 4 10 Analog to Digital The A to D is a 128 times over sampling Philips 7360 high performance device It is a stereo part utilizing high Sigma Delta conversion techniques that eliminates the need for sample and holds and extensive anti aliasing filters The right channel is input through R81 while R45 and C74 are the feedback network to the A to D s internal input buffer amplifier R47 and R46 provide negative and positive inputs to the A to D s internal sigma delta modulator C25 is a small filter cap placed between these inputs The left input is identical and uses R43 C69
28. TEMPO MONO DELAY type 4 notevalue 1 2 1 7 38 t TAP TEMPO PING PONG DELAY type Il EE P Pe DC 1 V 2 delay tap level delay tap level delay tap level feedback zs 3 subtype 5 notevalue 1 2 1 7138 1 21114 10 199 ji 3 subtype modulation play trig parm 1 1 1 jo 1 1 yc j H oe dii stat 93 1 2 149500 11 pa 10 ue j rectigger 5 1 1 J6 1 midinoef 6 1 1 128 modulation rec trig parm 1 2 1 jo 1 1 recouput 6 2 1 0 Jt 1 delay feedback SAMPLING type play end play trigger E 34 07 19 06 Alesis QuadraVerb Il 2 00 RVB MONO ROOM type 4 subtype 0 decay 1 1 1 o J9 M 1 2 1 5 5 1 3 1 1 reverb density 2 1 1 i diffusion 3 J 2 2 1 0 1 1 10 10 ix direct gt dly ate trig ated level ate hold lo reverb density ix direct gt dly PLATE 1 type 4 subtype 3 decay 1 dampinghi 1 p input high freq roll off Alesis QuadraVerb Il 2 00 E 35 07 19 06 lpredelay 4 1 1 25 1 mix direct lt gt 4 2 1 H i j di gatedievel 5 1 i atehdd 6 1 150 10 release
29. name ASCII digit 1 32 127 8 1 7 1 0 Alesis QuadraVerb Il 2 00 E 3 07 19 06 13 Program name ASCII digit 13 BLOCK TYPES 14a 14b 15a 20b 21a 21b Block 1 type definition Block 1 subtype definition Block 2 type definition Block 7 subtype definition Block 8 type definition Block 8 subtype definition 32 0 0 0 0 0 0 127 4 4 4 13 7 13 0 14 7 14 5 14 4 14 0 15 7 15 5 20 4 20 0 21 7 21 5 21 4 21 0 Block type definitions are given in the next section Block type definitions The upper limit and definition for the block subtype depend on the block type The upper limit and definition for the subtype are given in the section Block subtype defintions MODULATION 22 23 24a 24b 25 26 49 50 51 52a 52b 53 Definitions of the modulation sources are in the section Modulation source definitions Mod 1 source Mod 1 target block Mod 1 target type parameter route or mix Mod 1 target Mod 1 amplitude Mod 2 source Mod 7 amplitude Mod 8 source Mod 8 target block Mod 8 target type parameter route or mix Mod 8 target Mod 8 amplitude 0 129 e fe i Q 2 0 99 99 0 129 99 99 0 129 di ques Q 25 0 99 99 DANN OO ON N OO OO 8 22 7 22 0 23 7 23 0 24 7 24 6 24 5 24 0 25 7 25 0 26 7 26 0 49 7 49 0 50 7 50 0 51 7 51 0 52 7 52 6 52 5 52 0 53 7 53 0
30. route position byte is given in the section Route position definitions This number has a corresponding dB level given by the table in the section Route level definitions BLOCK TYPE DEFINITIONS This table defines the block types for a given parameter Block type NE BLOCK SUBTYPE DEFINITIONS These tables define the block subtypes for a given parameter Different block subtype tables are defined for each block type Type EQ 0 jLowpassfiler 6 jHighpassshelfeg 8 9 j4Bandparametriceqg Alesis QuadraVerb Il 2 00 E 6 07 19 06 Type DLY Type RVB Block subtype 0 Monochous Phasor 6 jMonolezie 8 Pitch shifter 9 jPithdetne O Monodelay 0 Rom 1 LE esi 3 1 4 j Chamberi 6 2 J J 8 jChamber2 9 JjLargeplate Spring Alesis QuadraVerb Il 2 00 E 7 07 19 06 MODULATION SOURCE DEFINITIONS O Pitchbend Controller 000 HE ue ducc Controller 123 Local generator 1 Local generator 2 MODULATION TARGET DEFINITIONS The modulation target type and target make up an 8 bit word TTNNNNNN where TT denotes the target type and NNNNNN denotes the target 4 The targets are for the effect block or mix specified by the target block O Block parameter If TT 00 NNNNNN Modulation target paramet
31. the input from a fiber optic cable from which it derives logic level outputs to present to the ASIC In turn the ASIC presents logic levels to J9 that get converted and transmitted via second output fiber optic cable This digital is broadcast and received an NRZ format that ranges from about 1 MHz to 6MHz and it is nearly a DC free code 5 21 Clock Sources and VCOs Alesis QuadraVerb Il 2 00 5 07 19 06 The DSP ASIC has four clock sources that are required to cover the full range of Q2 applications The simplest is the 48KHz external sync clock which is provided by J12 R89 in conjunction with clamping diodes D19 and D20 protect the ASIC s input from unruly transients that could otherwise inflict damage thereby reducing the chips longevity This ASIC also has an internal clock generator that is driven by M3 a 6 144MHz crystal which is stabilized by C63 C64 and a high impedance parallel resistor R119 The sample VCO which operates at 24 576MHz is constructed around U24 a CMOS un buffered inverting amplifier L1 and D12 comprise a tank circuit that has a voltage controlled resonant frequency The capacitance value of D12 varies as function of the control voltage This voltage is set by the DSP ASIC s phase control output pin contributing to a storage capacitor C2 R28 R29 C2 and C67 make up a stabilizing filter that allows the VCO to track over it s entire frequency range C65 and C66 act as coupling capacitors to effectively c
32. 0 A dio OUIDHWE SOCOM uuu tior ecu tu 2 4 00 A D D A Converters ii 3 4 10 Analog to Digital 3 4 20 Digital to Analog TR T 3 5 00 Digital Signal Pats circ peli ERREUR Hr Qro 4 EIN 4 Dill OSC Mm 4 52 SRAM oi 5 PANE deu E 5 5 21 Clock Sources and VCOSs 6 5 30 MIDI 6 5 40 Encoder Interface i 7 5 50 Footswitch InterfaGa euius ete tete nete enn diee 7 6 00 Appendix 1 Updates and Corrections A 1 6 10 Important Production A 1 6 11 VGO 1 6 12 SRAM Current Increase A 2 6 13 Main PCB change A 2 6 14 Reset Circuit Change A 2 6 15 Revision A amp C Input A 6 6 16 Revision A Sampling Modification A 7 6 17 Revision A amp C VCO A 8 7 00 Appendix 2 Test Procedures B 1 X210 Self u Su adde B 1 1 20 PUMMCY FESUN aaa B 1 Rent meen eee Rane trae ten eo B 1 7 22 Digital erro
33. 003 470w id DATED cone SIZE DRAWING NO REV B QUALITY CONTROL DATED C 4 o 112 8 RELEASED DATED SCALE SHEET Of Alesis QuadraVerb Il 2 00 H 3 07 19 06 REVISION RECORD R55 5 10 z VED ATE 5 ANALOG LTR ECO NO APPROVED DATE LEFT INPU POT R64 2 158 970 tu S x ABKIN ckt ond SW clodes qt 03 1009F AN com ee ADD 0900 Va 2767 33 9072 0 VREF X ort HS 25 12 NRST Hg lt lt 5 ISDATA AN x 563 Si bj 13 Ree fox 12 Z 3 AAA
34. 1 h diffusion 2 1 o 1 input high freq roll off 3 1 2 200 20000 50 predelay 4 13 h 250 1 mix direct lt gt dy _ 4 2 1 n 9 hH reflection level 5 1 1 t spread di reverberation swirl 6 1 1 h gatetig 7 1 1 2 1 gatedievel 7 2 1 h gatehold 8 1 50 10 release 1 1 8 2 50 10 Alesis QuadraVerb Il 2 00 E 14 07 19 06 2 type 4 subtype 7 1 damping hi do o EXP a BENE sq i pq ssa Or reverb density bah e diffusion 0 input high freq roll off 20 00 1 1 lo iki 99 99 99 99 mix direct gt dly 9 99 reflection level spread reverberation swirl 1 199 1 patetig O 2 7 99 lgatehold 8 1 500 fio release 8 2 2 10 500 10 PLATE 2 type 4 subtype 8 Beea Oe 199 dampinghi 1 2 1 9 lo lo Jos cid reverb density 2 1 1 H diffusion o 2 2 1 9 mix direct lt gt dly 4 2 1 1 9 H reflection level Lacie spread ea ess Lai reverberation attack CETE RO 2 1 IN 10 gate trig gated level o ga
35. 1 1 15 A02802 2 a 14 M DATAO0 2 01 fe 13 DATAD2 4 1 N DPATA03 8 5 AAA 220 2 6 003 in IN DATADi 7 14 RI A 70 gt RESET it gt paraos 8 105 05115 2 pataas 9 188 Ei B32A A A 270 i 5 97 VW 4 LED N R2 3 userei uao gt RESET EN E 1 R AAA 7 V 8 SWITCHES 74 04 74HC04 ii N 2 2 d DATAD 5 a Atk 270 OHMS 19 DAT 1 7 fosopr 38A A Leos N DATAO3 6 Ls DATA00 2 U25 colte ans 5 8 7 ps n 3100 colli ANNUS 4 UZDA V DATAOS E 05 83 erge V Y Y DA DATADA 6 103 33 885 A NA 5 4HC574 se SATAOR 7 02 94 Ha 6 romeo f 8105 RESA AA 7 9109 MS 2 4 ANN D C DAT A04 74HC574 DATA 03 07 DATA 60 07 sure LI 74HC74 MADORO4 1 a SwR3 Em N 29 aporia 2 0234 HD pres C BV 4 744600 Be 2v Gi N_DATADO 9 DATAGH to 025 1 ATAD TO LCD BOARD DATAGI od NDATA0E 744C00 TARGE DATAO 62 DIE mE m a 9230 fe IX T N bees four s L lt gt TL tour sev 74H00 2 gt Fi NOTES COMPANY 1 Unless spec ts cre 5 1 8W COMPANY AL E SIS e Unless specifiec oll dic ere 14914 4 3 HN27C 01AG FXCHIP musi be 1 Unles
36. 1 RES 270 OHM 1 8W 5 1206 0 10 0332 RES 3 3K OHM 1 8W 595 1206 0 10 0393 RES 39K OHM 1 8W 5 1206 0 10 0471 RES 470 OHM 1 8W 525 1206 0 10 0472 RES 4 7K OHM 1 8W 595 1206 0 10 0473 RES 47K OHM 1 8W 5 1206 0 10 0474 RES 470K OHM 1 8W 5 1206 0 10 0511 RES 510 OHM 1 8W 595 1206 0 10 0514 RES 510K OHM 1 8W 5 1206 0 10 0681 RES 680 OHM 1 8W 5 1206 0 10 0821 RES 820 OHM 1 8W 5 1206 0 10 0822 RES 8 2K OHM 1 8W 5 1206 0 11 0103 RES 10K OHM 1 8W 1 1206 0 11 0153 RES 15K OHM 1 8W 195 1206 0 11 0203 RES 20K OHM 1 8W 195 1206 2 RBR 0 0 0 0 00 00 000 00 0 Ra Rs2 Rs MAIN 14 8 JR amp R48 R56 R61 R62 R89 3 4 R22 R28 R43 R45 R50 0 5 Jw9OSJRILRISR27R89S R42 __ 9X JRi2RMtgRI24 ek 2 MAIN ek 2 14 6 J 9JR3738 R4647 H125 R20 8 q R68 R73 74 R76 77 R90 R100 R104 3 6 sPJ JR amp ReRHO I2 RH8 20 7 19 20 23 26 R31 34 R36 R44 R83 88 R114 Main geo J 8 _ R15 16 R67 R69 R72 R79 R103 R105 Li Z RST 106 109 R113 R117 3 MAIN R10 R121 R123 2 MAIN R6 MAN X R101 102 MAN 6 3 7 MAN 1 MAN
37. 2 00 100 8 54 7 54 0 0 100 8 55 7 55 0 0 100 8 56 7 56 0 0 100 8 57 7 57 0 0 100 8 68 7 68 0 0 100 8 69 7 69 0 0 100 8 70 7 70 0 0 100 8 7L 7 71 0 0 4 8 72 7 72 0 0 2 8 73 7 73 0 32 0 8 747 740 48 0 8 75 7 75 0 0 250 8 76 7 76 0 0 250 8 77 7 77 0 0 99 8 78 7 78 0 250 8 79 7 79 0 0 1 8 80 7 80 0 24 07 19 06 81 Generator 1 footswitch mode 0 1 8 81 7 81 0 82 Generator 2 type 0 4 8 82 7 82 0 83 Generator 2 trigger source channel 0 2 8 83 7 83 0 84 Generator 2 attack threshold 32 0 8 84 7 84 0 85 Generator 2 release threshold 48 0 8 85 7 85 0 86 Generator 2 attack time 0 250 8 86 7 86 0 87 Generator 2 release decay time or period 0 250 8 77 7 77 0 88 Generator 2 input gain 0 99 8 88 7 88 0 89 Generator 2 envelope hold time 0 250 8 89 7 89 0 90 Generator 2 footswitch source 0 1 8 90 7 90 0 91 Generator 2 footswitch mode 0 1 8 91 7 91 0 Generator type 0 Envelope generator 1 Peak follower 2 Ramp 3 LFO 4 Footswitch Trigger source channel 0 Left channel 1 Right channel 2 Left amp Right channels This number is multiplied by 0 04 to get the decay in seconds BLOCK PARAMETERS 92 Parameter 1 for 1st defined block MSB m Tm 93 Parameter 1 for 1st defined block LSB vi 94 Parameter 2 for 1st defined block MSB qub Cem Tu Block parameters are not stored for blocks that are off Parameters are s
38. 43 C33 36 38 39 2 T T T T T PO PO 48 67 69 75 78 C14 C31 C43 C33 36 38 39 C55 59 60 73 N 15 16 24 25 j Ja T IT T T T ala gt gt gt 2 2 2 2 HEATSINK E ali i 07 19 06 JAC 499 0004 amp PIN DIN P UAC 4 02 0001 JACK 1 4 MONO GLIFF Te VAC 4 0 0001 JACK TA steno A LED 3 02 0007 LED 3 020009 LED GRN 2 amp mm RECT LED 3020014 LED RED TT HPHLMP 1349 BUTTON LED BACKLIGHT GRN Q2 perpe em LIT 7 511093 MANUAL REFERENCE Q2 i i TTT CHART PRESET PROGRAM VER 2 00 Q2 ee CHART USER 0 PROGRAM VER 2 00 02 ADDENDUM VER 2 00 Q2 REFERANCE MANUAL dest 7 51 1167 QUICK REFERENCE GUIDEQ2 Aid TT CHART USER 1 PROGRAM VER 2 Q2 701000 I 7 01 0011 CRYSTALS 144 MHZ SERIES E r 772 ri r j i i RR O i 72 EMEN LL 72 LL 7 81 0065 FOAMMOLDEDSETP SHLDRDS 1 i O 9 15 1078 BUTTON POWER ozsam O r LL O FRAMEPOTQ2 0 LLLI 9351112 KNOBSTANDARDQ2 ea PLS 94151112 KNOB STANDARD Q2 E EE E TT LS 915 1113 KNOB CONCEN
39. 6 P 0 10 0621 RES 620 OHM 1 8W 5761206 2 0 10 0681 RES 680 OHM 1 8W 5 1206 1 0 10 0821 RES 820 OHM 1 8W 5 1206 1 SMR RES 8 2K OHM 1 8W 5 1206 RES 10K OHM 1 8W 195 1206 RES 15K OHM 1 8W 1 1206 RES 1K OHM 1 10W 595 0805 RES 91K OHM 1 10W 5 0805 E NID 0 02 2 M M M A A A MAIN i gt gt z MAIN MAIN MAIN MAIN MAIN gt gt z MAIN MAIN MAIN MAIN MAIN gt gt 6 54 C40 1645 46 C11 13 20 21 26 30 32 35 41 42 47 53 54 56 58 61 64 66 68 71 72 74 5 8 N IN N N wo in u20 21 27 i Po E Ue 2 IT o O U22 US 478 U25 N 4 Di 3 9 05 17 25 12579 R110 124 1995 96 N R73 R1 2 28 32 35 67 71 N R3 5 12 24 38 59 70 79 86 92 94 99 E MAIN JR37 4980 2 0 10 0150 RES 15 OHM 1 8W 5 1206 RRI x 0 10 0151 RES 150 OHM 1 8W 5 1200 1 1 1 1 1 4 MaN Rss 99 100 107 __ 12 916 23 25 41 43 45 46 51 52 56 60 69 0 10 0221 RES 220 OHM 1 8W 5 1206 5 879 88 89 6 34 54 66 68 81 R102 109 R112 123 i R15 18 20 40 42 44 53 55 7 j RSQ N R11 13 14 22 36
40. 73 74 98 12612098 ROO RIO 17 19 39 R21 R47 R57 R58 975 77 R82 j iu i nS Pd 2 2 N R62 R65 N R125 N 6 R127 128 2 8 26 29 31 33 48 61 63 66 1 5 LCD 5 1 ico 6 Group AlPartNo Descripion RefDesignator Comment SMS 4120244 SOCKET 44 PINPLCCSMD 1 y SMS 4120284 SOCKET 84 PINPLCCSMD 1 0 0 0 0 0 0 0 7 SWT 6020002 SWTCHDPDT MAIN SW swT 602001 SWITCH TACT BUTTON j Alesis QuadraVerb Il 2 00 07 19 06 Alesis QuadraVerb Il 2 00 G 7 07 19 06 NOTES Alesis QuadraVerb Il 2 00 a 1 07 19 06 13 00 Appendix 6 Schematics 74HC85 2 32233 See RAN aveass 1 E vhs 22pF RIT TXD gt Mae gt ANN 74HC04 74HC04 N 470uF CATHODE x 5
41. 88 TRANSMITTED AS 0 A6 A5 A4 A3 A2 A1 AO 0 0 0 0 0 048 A7 0 B6 B5 B3 B2 B1 BO 0 0 0 0 B8 B7 H 12 MIDI Program Table DumpRequest 00 00 OE OF 12 F7 Alesis QuadraVerb Il 2 00 E 22 07 19 06 When received the QuadraVerb 2 will respond to this message with a MIDI Program Table Dump 11 PARAMETER FORMAT The following specific parameter information shows the locations in which each parameter resides after unpacking the data from its 7 bit MIDI format into the 8 bit format as described in opcode 02 program data dump GLOBAL DATA FORMAT The Global parameters are comprised of 14 bytes of data Unlike the Program the Global parameters are not packed This results in unused bits for most global bytes These bits must remain at 0 For direct parameter editing sysex command 01H the Page and Parameter are given in the table below The Function should be set to 2 Global and the Block should be 1 8 X Parameter name Page Parm lolim hilim bits bit address 0 LCD contrast 1 1 1 10 8 0 7 0 0 1 Footswitch range head 1 0 299 16 2 7 1 0 2 Footswitch range tail 22 0 299 16 4 7 3 0 3 VU meter peak hold 3 1 0 1 8 5 7 5 0 4 Input audio source 4 0 1 8 6 7 6 0 5 Sample clock source 5 1 0 1 8 7 7 7 0 6 Digital left input channel 6 2 1 amp 8 8 7 8 0 7 Digital right input channel 6 3 1 amp 8 9 7 9 0 8 Digital left output channel 6 4 1 8 8 10 7 10 0 9 Digital right o
42. A gt lt gt lt atta 284403 4 Z 100 CH 33pF Es lt B 17347 m 2 26 NA SIE 2 4403 EAR em d cee ANN EAT NW 09 KS ca 28 ara cag AV Rie 07 i ESO CAS 2N4401 EA 3 RESETN EA TY WORDLEN L 049 Ji Rt VE R fB i 525 15 2 2K RHI ABKIN AA 5 wen 59 wen 13 2 De Dopo bon Y T4HCUD Dvo CAS 29 litas E Hevo4 4HCUO4 m gt pi 8 paci He 58 14HCUDA 12 2 2 fr 228802 Hay ren cee ABKHZ 04862 LM 3 07287 ae 8 072 wuz 21 38 40 nusta260 40 7 Ee 1 E N TOA ALESIS NE 77 NC 5 02 o Eu wvawiog tay MO SU AE LE 2 o a out TITLE RZB 10K A B AV t SEE E QUADRAVERB Il gw gt Xl NATE LEE 2 16 94 557 29 lt K a ee 2 n PXCHIP DATED CODE DRAWING NO REV Rag ANN A Les QUALITY CONTROL DATED 9 1128 020 A RELEASED DATED 2 oF 2 Alesis QuadraVerb Il 2 00 07 19 06 8 20 Front Panel Control
43. ALESIS QUADRAVERB SERVICE MANUAL V2 00 12 12 95 Alesis Quadra Verb Il 2 00 I 07 19 06 PREFACE This document is intended to assist the service technician in the operation maintenance and repair of the QuadraVerb II Digital Stereo Effects Processor Together with the QVII Reference Manual this document provides a complete description of the functionality and serviceability of the QVII Any comments or suggestions you may have pertaining to the document are welcome and encouraged WARNINGS TO REDUCE THE RISK OF ELECTRIC SHOCK OR FIRE DO NOT EXPOSE THIS PRODUCT TO WATER OR MOISTURE CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN The arrowhead symbol on a lightning flash inside a triangle is intended to alert the user to the presence of un insulated dangerous voltage within the enclosed product which may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamation point inside a triangle is intended to alert the user to the presence of important operating maintenance and servicing instructions in the literature which accompanies the product CAUTION Danger of explosion if battery is incorrectly replaced Replace only with the same type or equivalent type recommended by the equipment manufacturer Battery Manufacturer Panasonic Matsushita Type BR2325 Rating 3V 5mA REPAIR BY ANY PERSON OR ENTITY OTHER THAN AN AUTHORIZED ALESIS SERVICE CENTER WILL VOID THE ALESIS WARRANTY PR
44. B 1 fond MD Ioco seu RU B 1 8 00 Appendix Helpful Hints amp Common Solutions C 1 9 00 Appendix 4 Schematics ioc o ila aaa aaa D 1 9 10 Revision A Alesis QuadraVerb Il 2 00 V 07 19 06 9 20 Front Panel Control D 5 9 20 Revision A Component l D D 6 9 30 Revision Component l D D 7 10 00 Appendix 5 Software History i E 1 11 00 Appendix 6 MIDI F 1 EOD orla seated aca eate e e dra eo F 1 1120 ILS Er ER F 21 12 00 Appendix 7 Service Manual G 1 13 00 Appendix 8 Service Parts H 1 Alesis QuadraVerb Il 2 00 VI 07 19 06 1 00 General Description The QuadraVerb II and other digital reverbs achieve their results by slicing analog signals into segments and then converting them to a numeric value corresponding to the amplitude of the signal at that particular instant These values are then mathematically manipulated and stored at various locations in a memory loop for eventual playback By varying the placement and amplitude of incoming samples discrete time d
45. I pct 1599 898 71 21 Alesis QuadraVerb Il 2 00 E 32 07 19 06 DLY RING MODULATOR type 2 subtype 10 modulation trig 1 parm 1 1 1 1 1 modulation trig 2parm 1 2 1 1 1 speed 1 depth trigger source feedback 1 5 1 fj retiggerpont 2 1 1 125 1 sweeping mode 3 1 1 1 1 trigger source 4 1 1 jlo 4 1 Parameter Page Paran Bytes Low limit Hi Step MONO DELAY type 3 subtype 0 notevaue f 1 STEREO DELAY type 3 subtype 1 aa Je 1909001 4 2 note value 1 2 1 1 21111 1 2 t 50000 1 10 12 1 1 jo 9 H n E 5 x r Ol 8 e gt E feedback PING PONG DELAY type 3 subtype 2 N e e ii elay ote value eedback zipi2g S gas d gt U T 2 lt lt o D lt am Il Er i i elay ap level L lt gt R elay ap level b Im Qo eo O V JJ Alesis QuadraVerb Il 2 00 E 33 07 19 06 3 subtype 1 jo pu pe q 2 1 gt 1 4 3 1 1 9 1 1 44 411 jo J9 1 5 2 1 0 Jhs F leer Ce 1 Sei 4 1 79 1 masterfeedback 6 1 1 O ji TAP
46. IDI Global Data Dump FO 00 00 OE OF 07 data F7 data is in the same format as described in 00 but with a different number of bytes due to the difference in the global parameter size The total number of data bytes sent for a global data dump is 16 which corresponds to 14 bytes of global data 08 MIDI Global Data Dump Request FO 00 00 OE OF 08 F7 When received the QuadraVerb Il will respond to this message with a MIDI global data dump 07 09 MIDI Bypass or Compare FO 00 00 OE OF 09 function lt off on gt F7 function 0 2 BYPASS 1 COMPARE lt off on gt 0 fu nction off 12 function on When received the QuadraVerb Il will respond to this message by turning BYPASS COMPARE OFF ON Alesis QuadraVerb Il 2 00 E 2 07 19 06 OA MIDI DSP Error Message 00 00 OE OF 0A data F7 data 12 EFFECT MEMORY IS FULL 2 OUT OF LFOs 4 5 IS FULL 8 BLOCK COMBINATION NOT ALLOWED PARAMETER FORMAT The following specific parameter information shows the locations in which each parameter resides after unpacking the data from its 7 bit MIDI format into the 8 bit format as described in opcode 00 program data dump GLOBAL DATA FORMAT The Global parameters are comprised of 14 bytes of data Unlike the Program the Global parameters are not packed so that each parameter occupies its own byte This results in unused bits for most global bytes These bits must remain at 0 For direct paramete
47. K to 4 7K These changes ensure that the SRAM gets enough current to holds it s memory by making Q1 switch faster 6 13 Main PCB change The Q2 Main PCB has changed from Revision A to Revision C The new board offers improved performance and incorporates several earlier changes 6 14 Reset Circuit Change The following three pages reflect changes made to the Q2 reset circuit These changes must be made to all Revision A and C Main PC Boards in order to maintain data integrity The first page applies to both Revision A and C PCBs while sheet 2 applies to Revision A only and sheet 3 applies to Revision C only Alesis QuadraVerb Il 2 00 A 2 07 19 06 Alesis QuadraVerb Il 2 00 A 3 07 19 06 Alesis QuadraVerb Il 2 00 A 4 07 19 06 Alesis QuadraVerb Il 2 00 A 5 07 19 06 6 15 Revision A amp C Input Changes Add 2 3K resistors AlPartNo s 0 10 0302 Surface Mount or 0 00 0302 Through Hole across capacitors C33 and C75 See diagram 6 for locations This change prevents the audio outputs from inverting when the unit is clipping reducing noise under these conditions EE o Se 2 Places Brizri po Diagram 6 Alesis QuadraVerb Il 2 00 A 6 07 19 06 6 16 Revision A Sampling Modification To take advantage of the sampling feature included in software version 2 00 or higher it will be necessary modify Revision A PCBs The details of the modification are shown in Diagram 7
48. M514260AJ 7 SMD MAIN IC 32K x 8 SRAM HS SMD 2 JULUG 5 2 70 8031 _ IC 80031 MPU PLCCSMD 1 8 SM 271004 CTLO4QUADOPAPPSVD 3 X MAN 018 422 Group Part Description Ref Designator 5 2757360 SAA7360 445 0 o 1 Us 44444 Alesis QuadraVerb Il 2 00 G 2 07 19 06 SMI 2 64 0574 C 74HC574 OCTAL D FF SMD SMI 2 64 7400 C 74HC00 QUAD 2 IN POS NAND GATE SMI C 74HC04 HEX INVERTER SMD SMI C 74HCU04 HEX INVERTER SM SMI C 74HC10 TRIPLE 3 IN POS NAND GATE SMI C 74HC14 HEX INVERTER SMI C 74HC74 DUAL D FF SMD SMI C 74HC86 QUAD 2 IN EXOR S o D n lt lt lt lt lt lt lt lt m O O O O oO o E gt 2 50 0914 DIODE 1N914 SOD 80 SMD MAIN D1 3 D5 D7 D13 27 2 51 4401 TRANS 2N4401 NPN SMD 6 MAIN Q1 2 Q4 5 Q7 Q9 O 2 51 4403 TRANS 2N4403 PNP SMD 3 MAIN Q3 Q6 Q8 ee O 0 10 0047 RES 4 7 OHM 1 8W 5 1206 0 10 0100 RES 10 OHM 1 8W 595 1206 0 10 0101 RES 100 OHM 1 8W 5 1206 0 10 0102 RES 1K OHM 1 8W 595 1206 0 10 0103 RES 10K OHM 1 8W 595 1206 0 10 0104 RES 100K OHM 1 8W 5 1206 0 10 0105 RES 1M OHM 1 8W 5 1206 0 10 0123 RES 12K OHM 1 8W 595 1206 0 10 0150 RES 15 OHM 1 8W 5 1206 0 10 0151 RES 150 OHM 1 8W 5 1206 0 10 0203 RES 20K OHM 1 8W 5 1206 0 10 0221 RES 220 OHM 1 8W 525 1206 0 10 0222 RES 2 2K OHM 1 8W 595 1206 0 10 027
49. OVISION OF THIS MANUAL DOES NOT AUTHORIZE THE RECIPIENT TO COMPETE WITH ANY ALESIS DISTRIBUTOR OR AUTHORIZED REPAIR SERVICE CENTER IN THE PROVISION OF REPAIR SERVICES OR TO BE OR MAKE REPAIRS AS AN AUTHORIZED SERVICE CENTER ALL REPAIRS DONE BY ANY ENTITY OTHER THAN AN AUTHORIZED ALESIS SERVICE CENTER SHALL BE SOLELY THE RESPONSIBILITY OF THAT ENTITY AND ALESIS SHALL HAVE NO LIABILITY TO THAT ENTITY OR TO ANY OTHER PARTY FOR ANY REPAIRS BY THAT ENTITY Alesis Quadra Verb Il 2 00 II 07 19 06 SAFETY SUGGESTIONS Carefully read the applicable items of the operating instructions and these safety suggestions before using this product Use extra care to follow the warnings written on the product itself and in the operating instructions Keep the operating instructions and safety suggestions for reference in the future 1 10 11 Power Source The product should only be connected to a power supply which is described either in the operating instructions or in markings on the product Grounding the Plug This product has a 3 wire grounding type of plug a plug with a grounding pin for safety purposes This plug can only be used in a grounding power outlet If the plug does not insert into the outlet you are using the outlet probably is not a grounding type of power outlet Contact your electrician to replace the obsolete outlet with a grounding type of outlet instead of defeating the safety feature of the grounding type of plug
50. Periods of Non use If the product is not used for any significant period of time the product s AC power supply cord should be unplugged from the AC outlet Foreign Objects and Liquids Take care not to allow liquids to spill or objects to fall into any openings of the product Water or Moisture The product should not be used near any water or in moisture Heat Do not place the product near heat sources such as stoves heat registers radiators or other heat producing equipment Ventilation When installing the product make sure that the product has adequate ventilation Improperly ventilating the product may cause overheating which may damage the product Mounting The product should only be used with a rack which the manufacturer recommends The combination of the product and rack should be moved carefully Quick movements excessive force or uneven surfaces may overturn the combination which may damage the product and rack combination Cleaning The product should only be cleaned as the manufacturer recommends Service The user should only attempt the limited service or upkeep specifically described in the operating instructions for the user For any other service required the product should be taken to an authorized service center as described in the operating instructions Damage to the Product Qualified service personnel should service the unit in certain situations including without limitation when a Liquid has spille
51. R 2 X JRI20Ri22 1 k 2 X 58 60 R64 65 R71 R75 92 97 MN 41 JR55R59R66 R70 WI E 4 12 0244 SOCKET 44 PIN PLCC SMD MAIN U8 _ S 2 4 12 0284 SOCKET 84 PIN PLCC SMD MAIN 14 6 02 0011 SWITCH TACT BUTTON x Alesis QuadraVerb II 2 00 G 3 07 19 06 Revision E Service Parts List Group AlPartNo Description RefDesignator Comet 1 ASY 9 44 1113 JASSYLCDQ2 asy 9 79 0076 ASSYPCBSWITCHQ2 1 1 asy 9 79 0077 JASSYPCBPOTQ2 1 ASSY PCB MAIN REV E Q2 HEN EET ii ASY 9 96 1235 ASSYFRAMEBUTTONQ2 11 1 ASY 9961235 ASSYFRAMEBUTTONQ2 ASY 9 96 1247 ASIC PCVCO CD TESTED 2 U0 2 ASSY BACKLIGHT REV B 02 54 1 J _ CAB 4 18 1403 CABLE 16 PIN 60 1 DI 11 1 CAB 4 18 1623 CABLE DIL 24 PIN 98MM 01 A CAB 4 19 1302 CABLESIL amp PIN2252MM2MM 1 1 C j CAB 4 19 1332 CABLESIL amp PINCOAX225MM 11 1 CAB 4 19 1333 CABLESILS PINTOMM r r f f if f 4 19 1334 CABLE SIL amp PIN OMM t CAP 1 070101 CAP 100 uF ELEC 10V t CAP 1 08 0101 CAP 10 uF ELEC 16V s MA MAI MA MA C15 16 24 25 5 DIO 2014003 DIODE POWER 1N4003 j 4 5 DIO 2 01 5400 DIODE POWER 1 400
52. S 479 B an 74HCO4 74HCO4 AVN AA 4 CE 74HC138 20 A suo Wig ows J MA us xz B 220 DNE Lid Ayo SMS 5 ZN03 gt 55 000 5 LK ras sta lt lt pm 23 i ANN DATADO 2 925 1 gt 5v 00 Qo 2 lt 5 ES ATADI 2109 VN mes TE n Xin E ALL S tox U20A 53 93 5 74HC57 E 5 02 01 5 sa bi DATA05 soue Pda 6 08 28 AAA 1 a 06 26 B us sps 86 AAA 5 lt nATA00 74 574 AA 071 74HC7 ADORO4 1 74HC74 n Y SRM ADDROO pris 2 928 2 14 aces e m E98 74HC0 3 ES N our Le 47004 144005 i De ds 5 LM78L12 to 9236 GATAG2 4003 po T092 w 1 i 22uF DATAOS 7 DATAOG L 74 00 ATAO gt tov 9 c62 fe p a jt It 4 16 13 0230 16 a m 7 r L lt Le tour Bov 938 gt TA AZ Jf c24 L gea 74HC00 GE 45V ANN CRC our 1 2 Yo es 10000 foo0 F fooQuF 2 5 5 u 7 5 NOTES MPANY Unless specified oll resistors ore Sx 1 8W COMPANY ALESIS 2 Unless specified diodes are 14814 cis 3 8063 HN27C D AO FXCHIP must socketed 200 4 Unless specifies el eleetrolitie cop ere 16V 4 UN curd gt oy 5 C must se supplies with SMEV TB Gap Lec i Qm QUADRAVERB Il ve o bd NATE LEE 2 16 94 4144
53. TI DACE HC TEST2 DACI HE TESTS pace 42 CLK IN 32 IPHASE DAC LE 22 43 54 FXCHIP HM514260JP 7 J 510 gt roo T MONO OUT 6 a 3 la sn 598 2 AN 2 510 n Sete x 4 7K fi 6 24 3 LA gt 101 sl C57 1000pF gt R109 Dk AL c27 2 2 gt 2 DAL Ec qid APG TUE 2N4401 4 7K C25 rine Y 5 L gt gt QUADRAVERB II me BRAUN MA EN 9 40 1128 SCALE SHEET 2 Dr 2 07 19 06 8 10 Revision A
54. TRIC UPPER Q2 assy KNOB CONCENTRIC LOWER G2 9151115 KNOBVALUEQ2 OOOO 17 EXTENDER SWITCHQ2 E ses 8 02 Po RES 0 05 0200 RES2OHM1 2W5 1 RAS SMC 1 50 0101 100 1206 4 918 19 27 20 SMC 1 50 0102 1000 NPO 1206 103571017 SMC 1 50 0103 CAP 0 01 uF NPO 1206 0 SMC 1 500220 CAP22PFNPO 1206 2 6048 SMC 1 50 0270 CAP27PFNPO 1206 2 ons Group AlPartNo Description RefDesignato Comment SMC 1 500271 270 NPO 1206 2 2207 SMC 1 500330 CAP33PFNPO 1206 4 C23 29 49 50 Alesis QuadraVerb Il 2 00 G 5 U U U U U U OOO DH HAH ME ME ME M M M M M MTL MTL MTL MTL MTL MTL MTL PK PK PK LS LS LS LS LS LS LS Ze n U LS LS LS POT 07 19 06 5 5 5 n 3 NID DIN gt gt gt gt p gt Dv 1 50 0331 CAP 330 NPO 1206 2 1 50 0334 CAP 0 033 uF NPO 1206 1 50 0680 1 51 0104 CAP 0 1 uF X7R 1206 2 64 0138 74HC138 DEMUX DEC SMD 2 64 0574 IC 74HC574 OCTAL D FF 5 2 64 7400 IC 74HC00 QUAD 2 POS NAND GATE 2 64 7414 IC 74HC14 HEX INVERTER 2 64 7474 IC 74HC74 DUAL D FF SMD HW
55. Target block definition 1 block 1 8 block 8 9 left out 10 right out parameters Definitions of the modulation targets in the section Modulation target definitions Alesis QuadraVerb Il 2 00 11 2 mix 07 19 06 BLOCK MIXES 54 Direct level 0 100 8 54 7 54 0 55 Block 1 level 0 100 8 55 7 55 0 56 Block 1 inmix level 0 100 8 56 7 56 0 57 Block 2 level 0 100 8 57 7 57 0 68 Block 7 inmix level 0 100 8 68 7 68 0 69 Block 8 level 0 100 8 69 7 69 0 70 Block 8 inmix level 0 100 8 70 7 70 0 71 Master effects level 0 100 8 71 7 71 0 LOCAL GENERATORS 72 Generator 1 type 0 1 8 72 7 72 0 73 Generator 1 trigger source channel 0 2 amp 73 7 73 0 74 Generator 1 attack threshold 32 0 8 74 7 74 0 75 Generator 1 release threshold 48 0 8 75 7 75 0 76 Generator 1 attack time 250 8 76 7 76 0 77 Generator 1 release or decay time 0 250 8 77 7 77 0 78 Generator 1 input gain 0 99 8 78 7 78 0 79 Reserved for future use set to 0 8 79 7 79 0 80 Reserved for future use set to 0 8 80 7 80 0 81 Reserved for future use set to 0 8 81 7 81 0 82 Generator 2 type 0 1 8 82 7 82 0 83 Generator 2 trigger source channel 0 2 8 83 7 83 0 84 Generator 2 attack threshold 32 0 8 84 7 84 0 85 Generator 2 release threshold 48 0 8 85 7 85 0 86 Generator 2 attack time 0 250 8 86 7 86 0 87 Generator 2 release or decay time 0 250 8 87 7 87 0 88 Generator 2 input gain 0 99 8 88 7 88 0 89 Reser
56. a balanced stereo 1 4 phono plugs which utilize tip ring and sleeve connections The input jacks J6 and J7 are interconnected such that any signal plugged into J7 will be automatically routed to J6 as long as a phone plug is not already inserted into J6 The input signal from J7 s tip is routed to op amp U22A by means of a simple RC network C17 filters any high frequency while R57 sets the op amps ground reference while also acting as a fairly high input impedance 510K Finally R48 protects the op amps input from transients Op amp U22B is used for balanced signals If a mono plug is used the non inverting input is automatically grounded through the RC network of C79 R97 and R96 If however a stereo plug is used that RC network is used to match the input impedance as well as to provide a high frequency filter Since tip and ring input impedances must be matched these resistors are all 196 tolerance The output from op amp U22B is now sent to U26A It s input resistor R56 is used with the right input potentiometer to allow for a gain of 10 Finally this signal is routed to the A to D converter U14 through a DC blocking capacitor C10 and current limiting resistor R81 Also clamping diodes D16 and D17 limit the A to D input from roughly ground to 5 volts J6 has an identical input section built around op amp U26C U22D and U22A 3 20 Audio Output Section The left output channel is routed from the D A see sec 4 20 through R58 and
57. ack langing shape op m J m n gt Z O Q Il Il A speed epth eedback langing shape uz ac gt 90 JJ lt o D o Si 5 hasor speed epth Il 2 subtype ezlie motor speed igh rotor level O O JU m O m N m IS Il o c Da lt Il N ezlie motor speed igh rotor level are o DI o o D 3 20 O ale e m JJ n ubtype 8 itch shift fine 11111 159 99 1 coarse PITCH DETUNE type 2 subtype 9 detune amount p p 499 Le Alesis QuadraVerb Il 2 00 E 11 07 19 06 DLY Parameter MONO DELAY type 3 subtype 0 delay 1 1 t 50000 1 moigvalue 1 2 1 j feedback 1 X 1 07 19 06 Alesis QuadraVerb Il 2 00 RVB MONO ROOM type 4 subtype 0 decay 1 1 1 o J9 M 1 2 1 5 5 1 3 1 1 reverb density 2 1 1 i diffusion 3 J 2 2 1 0 1 1 10 10 ix direct gt dly ate trig ated level ate hold lo reverb density ix direct gt dly ROOM 1 type 4 subtype 3
58. ay 1 1 1 99 1 dampinghi 1 2 1 o 9 h 113 1 0 1 reverb density 2 1 1 h diffusion 2 1 o 1 mix direct lt gt dy 4 2 1 n t gatetig 5 1 1 O 2 1 gatelevel 5 1 gate hdd 6 1 50 10 release 6 2 50 10 i He i 1 20 00 i i i i Alesis QuadraVerb Il 2 00 E 16 07 19 06 NONLINEAR type 4 subtype 13 gate hold time 1 reverb density 2 diffusion 2 ROUTE POSITION DEFINITIONS Route position byte 9bits Sroute 4 Sblock 1 34 Dblock 1 where Sroute route source 0 Input L 1 Input R 2 Block inmix 3 Block mix 4 Block L 5 Block R Sblock route source block 1 Input 1 Block 1 8 Block 8 Dblock route destination block 1 Block 1 8 Block 8 92 Out L 102 Out R ROUTE LEVEL DEFINITIONS Below is a table that gives the corresponding dB level for a given route level OF Hg OB 2 20dB 3 380dB 4 360dB 5 0dB 6 32048 8 9 29048 Alesis QuadraVerb Il 2 00 E 17 07 19 06 17 0 dB 16 5 dB 6 16 0 dB 27 15 5 dB 28 15 0 dB 29 14 5 dB 30 14 0 dB 3l 13 5 dB 32 13 04 33 12 5 dB 34 12 0 dB 35 11 5 dB 11 0 dB 10 5 dB 10 0 dB 9 5 dB 9 0 dB 8 5 dB 8 0 dB 7 5 dB 7 0 dB 6 5 dB 6 0 dB
59. d For the dump all request User Bank 0 programs are dumped as individual program dumps 02 followed by all User Bank 1 programs dumped as individual program dumps 0C a global parameter dump 07 and finally a MIDI program table dump 1 1 07 MIDI Global Data Dump FO 00 00 OE OF 07 data F7 data is in the same MIDI data format as described in 02 but with a different number of bytes due to the difference in the global parameter size The global parameters for the MIDI dump are packed into 14 Quadraverb 2 bytes see below and transferred as 16 MIDI bytes The last byte packs the most significant bit of the footswitch head parameter into bit address 13 0 and the msb of the footswitch tail into bit address 13 1 The following table outlines this Alesis QuadraVerb Il 2 00 E 20 07 19 06 GLOBAL PARAMETER PACKING Parameter name lo lim hi lim bits bit address LCD contrast 10 8 0 7 0 0 Footswitch range head LSB 0 299 8 1 7 1 0 Footswitch range tail LSB 0 299 8 2 7 3 0 VU meter peak hold 0 8 3 7 3 0 Input audio source 0 8 4 7 4 0 Sample clock source 0 8 5 7 5 0 Digital left input channel 1 8 8 6 7 6 0 Digital right input channel 1 8 8 7 7 7 0 Digital left output channel 1 8 8 8 7 8 0 Digital right output channel 1 8 8 9 7 9 0 Digital output mode 0 8 10 7 10 0 Tap tempo footswitch 0 2 8 11 7 11 0 Global direct signal 0 8 12 7 12 0 Footswitch range head MSB tail MSB 0 299 2 13 1 13 0 MSBs for the foo
60. d Q5 is biased by resistive divider R13 and R10 C1 works with D1 to prevent engaging reset mode too easily R11 is a bias resistor for Q4 which triggers a reset that is delayed by the RC network of R12 and C3 U4B generates the RESET signal while U4C generates the compliment RESET signal C6 is a feedback capacitor that provides hysteresis to the reset generator Note that reset is active on power down as well as power up This is necessary to prevent noise on the microprocessor data and address busses from corrupting SRAM data Alesis QuadraVerb Il 2 00 4 07 19 06 5 12 SRAM The 8031 utilizes two 32K X 8 SRAMs U1 and 13 to store program data These memory chips are necessary for proper command execution and must be powered even when the unit is turned off A 3 volt battery B1 supplies power to the SRAMs when the unit is turned off WARNING Danger of explosion if battery is incorrectly replaced Replace only with the same type or equivalent type recommended by the equipment manufacturer Battery Manufacturer Panasonic Matsushita Type BR2325 Rating 3V 5mA D2 acts as a switch to apply battery current to the SRAMs through R50 when the power supply is off When the power supply is on Q1 switches memory power over to the power supply which causes D2 to be reversed biased thereby cutting off battery current R51 supplies base current to Q1 D7 pulls the base voltage up by one diode drop 0 7V thus allowing the emitter voltage
61. d or objects have fallen into the product The product is exposed to water or excessive moisture The AC power supply plug or cord is damaged The product shows an inappropriate change in performance or does not operate normally or The enclosure of the product has been damaged Lo c Alesis Quadra Verb Il 2 00 III 07 19 06 General Troubleshooting While this manual assumes that the reader has a fundamental understanding of electronics and basic troubleshooting techniques a review of some of the techniques used by our staff may help l 2 10 11 12 Visual Inspection A short visual inspection of the unit under test will often yield results without the need of complex signal analysis burnt or loose components are a dead giveaway Self Test Alesis products that utilize microprocessor control contain built in test software which exercises many of the units primary circuit functions Self test should always be done following any repair to ensure basic functionality Environmental Testing Applying heat and cold heat gun freeze spray will often reveal thermally intermittent components Clock crystals I C s and capacitors are particularly prone to this type of failure Burn in Testing Leaving a unit running overnight often reveals intermittent failures such as capacitors that begin to leak excess current after a significant amount of time Cable Checks Wiggling cables can reveal intermittent failure
62. dB 1 5 dB 0 dB 0 5 dB 0 0 dB Alesis QuadraVerb Il 2 00 E 40 07 19 06 11 00 Appendix 4 Service Manual History 09 06 94 V 1 00 11 8 94 V1 01 1 95 V1 02 11 29 95 V2 00 the Alesis QuadraVerb Il 2 00 1st Release Page 2 Op amp reference designations changed according to revision C schematic Page 3 Description of DAC power supply filtering changed to match actual operation Page 6 Description of DSP ASIC internal clock changed to matched actual operations Pages E1 E2 Added software version 1 05 to Software History Pages F1 F19 Added Midi System Exclusive Implementation Page A2 Added chapter 6 14 Reset Circuit Changes Page 1 Specified REV C PCBs as type referenced in text Appendix 1 Added several updates Appendix 5 Added V2 00 and 2 01 to software history Appendix 6 Added Chapter 11 20 V2 0X Sys Ex Appendix 8 Added column headings to all BOM pages Appendix X Schematics moved to end of manual to accommodate use of the larger 11X17 size Consequently most appendix s and appendix page s have changed Added REV E to schematics and BOM sections Updated Table of Contents F 1 07 19 06 Group Ret Designator ASY 979008 ASSYPCBMAING2 14 1 S AsY 996124 ASSY LCD BACKLIGHT 00 00 0 00 0 31 1 ASY 9961235 J ASSYFRAMEBUTTONQ2 A __ 418143 JCcABLE16 PIN601DL A 11 44841622 CABLE DIL 24 PIN98MM0 1 1 11
63. decay 1 dampinghi 1 doo o o o input high freq roll off Alesis QuadraVerb 11 2 00 E 13 07 19 06 predelay 4 1 1 t 25 1 mix direct lt gt dly 4 2 1 n IE gatedievel 5 1 9 h gate hdd 6 1 50 10 release 6 2 50 10 PLATE 1 type 4 subtype 4 decay 1 0 1 1 1 99 1 dampinghi 1 2 1 1 do 5 1 8 1 o 9 1 reverb density 2 1 1 h diffusion input high freq roll off 3 1 2 200 20000 50 FE qt mix direct lt gt dy 4 2 1 11 h gatetig 5 ec pp ET gate hold 6 1 50 10 release 6 2 10 50 10 CHAMBER 1 type 4 subtype 5 decay 1 1 1 h daminghi 1 2 1 0 9 113 1 0 1 reverb density 2 1 1 h diffusion 2 2 1 JO 1 input high freq roll off 3 1 2 200 20000 50 predelay 250 h mix direct lt gt dy 4 2 1 n 9 h gaetig 5 1 1 jo jh 1 gatedievel 5 1 gate hold 6 1 50 10 release 7 6 2 50 10 ROOM 2 type 4 subtype 6 decay 1 1 1 h dampinghi 1 2 1 9 lo 1 3 1 o 99 1 reverb density 2 1
64. der to optimize data transfer Eight MIDI bytes are used to transmit each block of 7 QuadraVerb 2 data bytes If the 7 data bytes are looked at as one 56 bit word the format for transmission is eight 7 bit words beginning with the most significant bit of the first byte as follows Alesis QuadraVerb Il 2 00 E 19 07 19 06 SEVEN QUADRAVERB 2 BYTES AT 6 5 A2 B7 B6 B5 B4 B3 B2 Go C5 C4 C3 D7 D6 D5 D4 D3 D2 E7 E6 ES E4 E2 F7 F6 F5 F4 F3 F2 G7 G6 G5 G4 G3 G2 O RE Mee d t O UJ C Cy 4C CO IRANSMITTED AS PEON OT SARTO SOLO OO OOO N Q J D There are 306 data bytes sent for a single program dump which corresponds to 256 bytes of program data With the header the total number of bytes transmitted with a program dump is 314 The location of each parameter within a program dump is shown in the next section QuadraVerb 2 Program Data Format 03 MIDI User Bank 0 Program Dump Request FO 00 00 OE OF 03 lt program gt F7 lt program gt 0 99 selects individual user programs in User Bank 0 100 selects current edit 101 is a dump all request When received the QuadraVerb 2 will respond to this message with a MIDI user program dump 02 of the User Bank 0 program or edit selecte
65. direction D flip flop U20B 5 50 Footswitch interface J3 is the footswitch jack The footswitch can be used for program advance or tap tempo delay It is coupled to an 8031 port pin through a transient protection resistor R6 It is also connected to pullup resistor R3 J4 is the bypass foot switch jack and is coupled to the 8031 through R5 and utilizes R4 as a pullup resistor Both foot switches default to the normally open momentary type unless a normally closed type is installed before power up in which case the processor will Alesis QuadraVerb Il 2 00 7 0 19 06 6 00 Appendix 1 Updates and Corrections 6 10 Important Production Changes 6 11 VCO Mod The following changes Diagrams 1 and 2 improve VCO Voltage Controlled Oscillator performance and prevents the unit from possibly detuning by itself tiis QQ REV PCB VCO MUD Z TTN 1 REMOVE C65 f 2 CHANGE R27 100K OHM N Y 3 SOLDER ONE LEAD A 10pF CER DISC CAP m TO ONE LEAD DF 220 OHM 1 8W RES EH 4 SOLDER LEAD DF 10pF CAP TO TOP SIDE PAD s C65 AND SOLDER LEAD OF 220 OHM RESISTOR TO BOTTOM SIDE PAD DF C66 SEE DRAWING I mi A c eH mui sss 22 Diagram 1 Alesis QuadraVerb Il 2 00 A 1 07 19 06 I Diagram 2 6 12 SRAM Current Increase R50 was changed from 100K to 10K R51 was changed from 100
66. elays are achieved When mixed together and converted back into analog these delays simulate the reflections associated with natural reverbs and delays as well as non natural effects such as reverse reverbs and gated reverbs The added capabilities of an 80C31 micro controller allow for user manipulation and storage of algorithm parameters Some of the PCBs in the unit have undergone revision The reference designators used in the text apply to the REV C Main PCB schematic and Comp 1 D unless otherwise noted 2 00 Power Supply J13 is the AC power input Its voltage is derived from the a 20 volt ampere external transformer The Q2 draws about three quarters of an amp while in operation SW1 connects the AC power jack to the input of the power supply which generates 12V 5V and 12V The 12V rail is generated by a voltage doubler C4 D8 D6 and C20 supplying roughly 20V DC and about a volt of ripple to the input of regulator U15 The 12V output of U15 is filtered by C23 The 12V rail is generated in a similar method through a negative voltage doubler C13 D9 D10 and C21 a 12V regulator 017 and filtered by C31 The 5V rail requires a rectifier diode D4 five input filter capacitors C9 C19 C22 C24 C51 a 5V regulator U16 and an output filter capacitor C29 2 10 PUP Circuit Since the Q2 is used as outboard gear in audio recording studios it is important not to generate audible thumps at the outputs during powe
67. eters on the same page 8 MIDI controller O can be used for program bank select when the table is off 0 Preset 1 to 127 User 9 MIDI mods will no longer affect the program table and the program table will no longer affect MIDI mods 10 Defaults are added to the envelope and peak followers in blank programs upon user memory clear 11 PROGRAM switch goes to program page 1 if in page 2 12 Program title now displays User or Preset 13 Data from the ADC is in 18 bit mode NOD 08 24 94 1 03 Checksum 3ED2H 1 The preset programs were changed 10 28 94 1 05 Checksum 6ADDH Hold time was added to the ENVELOPE local generator The RAMP local generator was added Tap tempo delays are set by to MIDI clock Programs load 2x faster A program write protect was added under the Store pages VU meters no longer freeze when using external 48kHz clock MIDI sysex bugs were fixed Test routines for MIDI optical I O and sram were added Reverb gate not affected by changing other parameters 10 Modulation of parameters is more time consistent 11 Modulation of Leslie speed is smoother 12 Error message displayed when MEMORY FULL is caused by a delay note value change 13 Program change to a program containing a Leslie will not cause occasional audio glitches 07 06 95 2 00 Checksum 9BFDH Alesis QuadraVerb Il 2 00 D 1 07 19 06 1 Added features Sampling Phase Inversion
68. etriceq 9 j4Bandparametriceqg Type PCH O Phasor 6 8 Pitch shifter 9 Alesis QuadraVerb Il 2 00 E 27 07 19 06 DLY O Monodelay 6 Sampin O 1 1 2 Hal f 3 Plate 1 4 Chambrit 5 Room 2 6 2 8 Chambr2 9 Reverse MODULATION SOURCE DEFINITIONS O Pitchbend Controller 000 Controller 123 Local generator 1 Local generator 2 Alesis QuadraVerb Il 2 00 E 28 07 19 06 MODULATION TARGET DEFINITIONS The modulation target type and target make up an 8 bit word TTNNNNNN where TT denotes the target type and NNNNNN denotes the target 4 The targets are for the effect block or mix specified by the target block 00 Block parameter If TT 00 NNNNNN _ Modulation target paramet 0 Parameter 1 Parameter 2 NUR Parameter 33 If TT 2 01 o 6 Block2inmx i ss Block 8 right If TT 10 O Directlevel Block 2 out level Block 2 inmix level EE s Block 8 inmix level Master fx level BLOCK PARAMETER DEFINITIONS These parameters are packed as 8 or 16 bit words MSB first in programs but are always considered 16 bit words LSB first in parameter edits Alesis QuadraVerb Il 2 00 E 29 07 19 06 Parameter LOWPASS FILTER type 1 sub
69. lized power unit up while holding PROGRAM COMPARE and BLOCK buttons down after changing the EPROM SRAM or any part of the battery backup 7 10 Self Test The following Steps outline the use of the Q2 s self test routines To initiate the self test hold PROGRAM and BLOCK while powering the unit up The unit will then proceed to test the following LEDs All front panel LEDs lit sequentially and immediately proceeds to the next test SWITCHES Pressing Individual front panel buttons toggles the LEDs for each button BLOCK lt BLOCK PAGE lt and PAGE toggle the LED of the adjacent button LEDs are toggled if VALUE ENTER is pressed Holding the buttons down causes the LEDs to flash Press PROGRAM and BLOCK simultaneously to exit to the next test CUSTOM CHARACTERS All Displays custom LCD segments simultaneously Press PROGRAM and BLOCK simultaneously to exit to the next test x CUSTOM CHARACTERS Single Use the VALUE ENTER wheel to select individual custom LCD characters Press PROGRAM and BLOCK simultaneously to exit to the next test CKSUM Checks the ROM s checksum for accuracy Press PROGRAM and BLOCK simultaneously to exit the test routines 7 20 Further Testing 7 21 Audio Using a clean audio source CD or DAT preferred set up the Q2 according to the user manual Listen to the output of the Q2 for any distortion or unusual clicks and pop
70. n 2 00 for details No LCD Loose LCD cable Faulty LCD cable Faulty RESET signal Troubleshoot and repair as necessary see section 5 11 for details Faulty LCD Replace and retest Software parameters out of range Distortion Faulty Power analog 12V Troubleshoot and repair as 12V supply necessary see section 2 00 for details Faulty DAC U12 Replace and retest Software parameters out of Reinitialize unit and retest range Faulty PUP circuit Troubleshoot and repair as necessary see section 2 10 for details Faulty RESET signal Troubleshoot and repair as necessary see section 5 11 for details Faulty opto isolator U9 Hex inverter U4 is faulty Faulty F X ASIC U6 Faulty F X ASIC U6 Alesis QuadraVerb Il 2 00 C 1 07 19 06 9 00 Appendix 4 Software History DATE VERSION COMMENTS 07 26 94 1 00 Checksum F3AAH Initial software release 07 26 94 1 01 Checksum F6D5H 1 Changed the names of a couple presets 08 04 94 1 02 Checksum 8896H 1 Block move has been extended to include modulations 2 The default footswitch range is now 0 Preset to 99 User 3 The FX are updated when in ROUTE amp COMPARE 4 VUs reflect digital input selections and are turned off when the channel is 3 through 8 A stack overflow was fixed which happened when using processor effects and editing a reverb decay parameter MIDI sysex receive ON OFF works Changing modulation parameters no longer affect param
71. nerator that drives the crystal M2 to provide a 12MHz master clock C7 and C8 are small capacitors from each side of the crystal to ground that provide oscillator stability The software is stored in the EPROM U2 which as of this time is a 1 Megabyte part To access external memory devices the 8031 utilizes a multiplexed lower address buss U7 is a 74HC573 octal latch that is used to decode these lower address bits from the data buss It is controlled by the ALE output from the 8031 5 is a 74HC138 3 to 8 decode device Controlled by the 8031 it enables data transfers to various circuit locations It clocks octal registers U10 11 U25 provides the LCD enable and also allows for extended EPROM addressing by clocking the D flip flop U20A U10 lights front panel LEDs by pulling the select lines low Each output is followed by a 270 O resistor to provide current limiting U25 lights the front panel LED bar graph display and also utilizes 2700 current limiting resistors on it s outputs In the same manner U11 lights four of the front panel LEDs and with it s four additional outputs it pulses the front panel switch matrix columns Rows are then read back by four dedicated port pins on the 8031 to identify any switch closures that might have occurred 5 11 Reset This is an especially important circuit that safely halts processing when power is removed or briefly disturbed The two transistors Q4 and Q5 turn on when external power is connecte
72. onnect the tank circuit to the amplifier R27 acts as a self biasing resistor to keep the inverter U24A biased to it s midpoint which allows it to behave essentially as a linear amplifier The remaining clock source is the digital VCO which is constructed around 19 It s operation is very similar to the sample VCO with the addition of coupling capacitor C39 an additional bias resistor R42 and a tank coupling resistor R40 The digital VCO operates at half the speed of the sample VCO or 12 288MHz The digital VCO s control voltage is derived through a charge pumping scheme that is controlled by the DSP ASIC When DVCO is pulsed high C40 delivers small quantized packets of charge to gradually increase the control voltage which effectively speeds up the VCO and thus increasing DSP speed for maintaining sample rate accuracy This charge is delivered through D14 while Q2 supplies current to replenish C40 when the brief charge transfer is completed Conversely when DVCO is pulsed high small charge packets are effectively removed for the storage capacitor C2 This gradually reduces the control voltage and causes the VCO to slow down and thus decreasing DSP speed again maintaining sample rate accuracy Again this charge is transferred through D13 while Q3 allows C41 to retain it s nominal voltage without bleeding the storage capacitor R1 and R30 act as current limiters to suppress current spikes that could degrade the VCO s performance
73. ontroller 0 is fixed 7 The spelling of ATTACK TIME in the footswitch mod pages is corrected 8 Transmitting MIDI to the Q2 during power up will no longer cause problems Alesis QuadraVerb Il 2 00 D 2 07 19 06 10 00 Appendix 5 MIDI Implementation 10 10 V1 0X V1 0X September 9 1994 SYSTEM EXCLUSIVE FORMAT The QuadraVerb Il MIDI System Exclusive message format is as follows FO System exclusive status 00 00 OE Alesis manufacturer id QuadraVerb id cc Opcode dd Data F7 End Of Exclusive OPCODES 01 MIDI Edit FO 00 00 OE OF 01 lt function gt block lt page gt lt parameter gt data 16 F7 function 0 PARAMETER 1 2 MIX 2 GLOBAL lt block gt 1 8 4 of block to be edited Doesn t matter for GLOBAL edits lt page gt 1 of last page under function page for value to be edited lt parameter gt 1 of last parameter on page parameter of value data 16 gt is in format described below It is a 16 bit value which is transmitted in three MIDI bytes LSB first TWO QUADRAVERB BYTES 0 A7 A6 A5 A4 A3 A2 A1 AO LSB 1 B7 Bo B5 BA B3 B2 B1 BO MSB TRANSMITTED AS 0 0 A7 A5 A4 A2 Al 1 0 AO B7 B6 B5 B4 B3 B2 2 0 Bl 0 0 0 0 02 MIDI User Program Dump FO 00 00 OE OE 02 lt prog gt data F7 lt program gt 0 99 selects individual user programs 100 selects edit data is in a packed format in order to optimize data transfer
74. program or edit selected For the dump all request User Bank 0 programs are dumped as individual program dumps 02 followed by all User Bank 1 programs dumped as individual program dumps 0C a global parameter dump 07 and finally a MIDI program table dump 1 1 OF MIDI Block Bypass Dump 00 00 OE OF OF data F7 data is in format described below It is an 8 bit value which is transmitted in two MIDI bytes Bit A7 corresponds to the block bypass of block 8 likewise 6 corresponds to block 7 and 0 corresponds to block 1 If thebit value 1 the block is bypassed if thebit value 0 the block is not bypassed ONE QUADRAVERB 2 BYTE 0 A7 5 4 A2 1 TRANSMITTED AS 0 A6 AS 4 A2 Al 1 0A00 0 0 0 0 0 10 MIDI Block Bypass Dump Request FO 00 00 OE OF 10 F7 When received the QuadraVerb 2 will respond to this message with a MIDI Block Bypass Dump 11 MIDI Program Table Dump FO 00 00 OE OF 11 data F7 data is in format described below The 128 MIDI program table entries are 9 bits each and are transmitted in two MIDI bytes Values in the range 0 99 correspond to Presets 0 99 values 100 199 correspond to User bank 0 programs 0 99 and values 200 299 correspond to User bank 1 programs 0 99 TWO QUADRAVERB 2 MIDI TABLE ENTRIES 0 A7 6 5 4 A2 1 0 0 0 0 0 0 0 A8 2 B7 B6 B5 4 B3 B2 1 BO 0097 0 2027002 40 207
75. r editing sysex command 01H the Page and Parameters are given in the table below The Function should be set to 2 2Global and the Block should be 1 8 X Parameter name Page Parm lolim hilim bits bit address 0 LCD contrast 1 1 1 10 8 0 7 0 0 1 Footswitch range head 2 1 199 8 1 7 1 0 2 Footswitch range tail 2 2 0 199 8 2 7 2 0 3 VU meter peak hold 3 1 0 1 8 3 7 3 0 4 Input audio source 4 1 0 1 8 4 7 4 0 5 Sample clock source 5 1 0 1 8 5 7 5 0 6 Digital left input channel 6 2 1 amp 8 6 7 6 0 7 Digital right input channel 6 3 1 amp 8 7 7 7 0 8 Digital left output channel 6 4 1 amp 8 8 7 8 0 9 Digital right output channel 6 1 1 8 8 9 7 9 0 10 Digital output mode 7 1 0 1 8 10 7 10 0 11 tempo footswitch 8 1 0 2 8 11 7 11 0 12 Global direct signal 9 0 1 8 12 7 12 0 13 Reserved for future use set to 0 9 0 1 8 13 7 13 0 QUADRAVERB II PROGRAM DATA FORMAT Programs contain 256 bytes of packed parameter data The first 92 bytes are common parameters for all programs The next 164 bytes depend on the number of bytes required for parameters of the effect blocks and the number of routes enabled Usually not all of these bytes are used and in this case the end of the routing is designated by OFFH OFFH Only numbers with negative offsets 2 s complement form Parameter name lo lim hi lim bits byte msb byte lsb PROGRAM NAME 0 Program name ASCII digit 0 32 127 8 0 7 0 0 1 Program
76. r up These are caused by applying power to the output amplifiers in a non symmetrical manner and in extreme cases this could actually damage studio monitors To prevent this situation the Q2 employs a Power UP mute circuit that effectively eliminates any power up transients at the output jacks The RESET signal see section 5 11 is routed through R116 to the base of Q9 which in turn controls other transistors that apply power to the output amplifier U18 C49 adds a reasonable delay after the RESET signal goes high so that the power supply is fully stabilized before it is engaged to the output amplifier D21 acts as a switch to quickly discharge C49 in case of intermittent power loss When Q9 is turned on it starts a chain of events that turns on Q6 Q8 and finally Q7 The biasing resistors for these transistors are R118 R115 R177 R112 R113 R110 and R111 C27 is a bypass capacitor for the positive supply while C25 serves to bypass the negative supply Alesis QuadraVerb Il 2 00 1 07 19 06 3 00 Analog Signal Paths 3 10 Audio Input Section The Q2 can be used in several stereo or mono audio applications Additionally it can support both balanced and single ended configurations A balanced circuit requires three analog connections per channel i e signal signal and ground A single ended application requires only two connections signal and ground Regardless of the application the audio signals are routed to and from the unit vi
77. s cil eleciralitic cop cre 16V 0 5 US 74HC 0 must be supplied wits SMEM j m QUADRAVERB Il NATE LEE 5 16 94 GHEEREDE RATERS CODE SIZE DRAWING NO REV QUALITY CONTROL DATED 9 40 1128 C RELEASED DATED SCALE SHEE 1 of 2 07 19 06 5 ANALOG LEFT IN R61 VV 1K R63 1 510K c78 000 VDDT D A OUT CE lt RESET 5 cat uF 15 gt NNN veo LE 4 7 I 4 ne vss 18 xin S H 1 xsysi XSYS2 18 5K 1 gt 854 OPTICAL OUT SAA7360 aek m A D OUT 8107 4 7K C26 LEFT OUTPUT LEVEL POT 2 1 LTR REVISION RECORD O NO APPROVED 4BKIN and SW diodes RIGH OUTPUT LEVEL 4 6 P q 4X
78. s 7 22 Digital I O The digital fiber optic input can be tested by connecting an optical cable from the optical input of the Q2 to the output of any compatible unit such as ADAT or QuadraSynth and turning on the Q2 s DIGITAL INPUT in the GLOBAL functions Audio output should sound clean and undistorted Similarly the digital output can tested with either a digital or audio input using a unit that is compatible such as ADAT 7 23 MIDI MIDI is easily tested with a system exclusive storage unit such as DataDisk or MIDI equipped computer by sending all programs to and receiving them back from the storage unit Keyboard controllers and patch changers also be used to test MIDI in Alesis QuadraVerb Il 2 00 B 1 07 19 06 8 00 Appendix 3 Helpful Hints amp Common Solutions Troubleshooting a complex device such as the QuadraVerb Il can range from the simplicity of looking seeing and reseating a loose cable to examining complex timing relationships of data and control and replacing the slightly bad latch The following table is presented in an effort to relieve the beleaguered technician from having to discover some of the common fixes we have seen Please note that we only cover the most likely causes not all of them SYMPTOM POSSIBLE CAUSE SOLUTION Unit is Dead No lights no Faulty A C adapter Replace and retest function Faulty digital 5V power Troubleshoot and repair as supply necessary see sectio
79. s such as loose cables or poorly soldered headers Remember to check power supply cables as well Flexing the PC Board Poor solder joints and broken traces can often be found by pressing the PC Board in various places Tapping Components Sometimes tapping on a component particularly crystals will cause it to fail Power Down up Turning the unit off and back on rapidly several times may reveal odd reset and or power supply failures Reset Threshold A Variac variable transformer can be used to check reset threshold levels This can be particularly useful in helping customers with low line problems Compressors Using a compressor limiter is often helpful when attempting to solve low level noise problems as well as assisting with DAC adjustments Sweep Tests Sweep generators are very useful in checking the frequency response envelopes of anti aliasing filters Piggybacking Piggybacking I C s is particularly useful when troubleshooting large sections of logic This is especially true when working with older units Alesis QuadraVerb Il 2 00 IV 07 19 06 Table Of Contents La ii WARNINGS ica ii SAFETY SUGGES TIONS saepe protratto PP PEDI iii General Troubleshooting i iv 1 00 General Description rai ite 1 2 00 Power Supply 1 RIE 1 3 00 Analog Signal Paths 2 3 10 Audio Input 2 3 2
80. source 4 1 1 jo PHASE INVERTER type 1 subtype 18 output phase 1 j 1 1 0 Ja 1 Alesis QuadraVerb Il 2 00 E 31 07 19 06 speed eedback mi o D lt He ri m BE 2 c Il o gt 2 ER e 2 subtype speed eedback redelay chr1 gt O O ac lt Il o lt Il speed eedback redelay chr1 chr2 redelay chr3 chr4 qa Q e lt O E gt 2 2 GO zZ ke Il speed epth eedback langing shape op m J m n gt Z O Q Il Il A speed epth eedback langing shape uz ac gt 90 JJ lt o D o Si 5 hasor speed epth Il 2 subtype ezlie motor speed igh rotor level O O JU m O m N m IS Il o c Da lt Il N ezlie motor speed igh rotor level E o DI o o D 3 20 O ale e m JJ ke n ubtype 8 itch shift fine 1 1 1 99 1 coarse PITCH DETUNE type 2 subtype 9 detune amount E
81. ted hold i 2 X 50 10 release 8 2 10 50 10 CHAMBER 2 type 4 subtype 9 decay 1 1 1 99 1 dampinghi 1 2 1 o 99 h 113 1 0 99 1 reverb density 2 1 1 h diffusion 2 1 o 1 mix direct lt gt dly 4 2 1 n hH reflection level 5 1 1 99 t spread 1 jo J9 h reverberation attack 6 1 1 1 10 JP2 pn io 99 gate hold 8 a 2 10 Alesis QuadraVerb II 2 00 E 15 07 19 06 1 1 2 1 release LARGE PLATE type 4 subtype 10 99 1 99 1 lo 99 1 99 1 diffusion 2 2 1 1 0 250 11 predelay 250 9 EM 99 99 gatetig 711110 Jt gatedievel U 7 1 1 7 8 1 50 10 release 8 10 150 0 LARGE ROOM type 4 subtype 11 decay 1 1 1 91 1 2 1 91 11 1 0 1 reverb density x 2 1 1 9 1 diffusion 2 1 9 1 mix direct lt gt dy 4 2 1 i reflection level 5 1 1 jo 99 11 spread ea ess Lai reverberation swirl renti eg 4427 Ja Je 1 10 gate trig gate level o gate hold 1 2 150 10 release 8 50 10 SPRING type 4 subtype 12 dec
82. tored in order of appearance on the Quadraverb 2 display by block parameter page and from left to right within the page the 1st stored parameter appears on the display at the left most block that is not off on it s 1st parameter page at the left The parameter definitions are given for each block type and subtype in the section Block parameter definitions Exists only if the block parameter requires two bytes BLOCK ROUTING 92 Route 1 position byte LSB 0 255 amp 9247 9250 93 Route 1 position byte MSB O 1 J 492579357 93 Route 1 level 58 7 93 6 93 0 94 Route 2 position byte LSB 255 8 04 7 O4 0 This number is offset by the number of block parameter bytes that are stored An equation for calculating the route position byte is given in the section Route position definitions This number has a corresponding dB level given by the table in the section Route level definitions BLOCK BYPASS 255a Block Bypass for block 1 12 Bypassed 0 1 255 0 255 0 255b Block Bypass for block 2 12 Bypassed 0 1 1 255 1 255 1 255c Block Bypass for block 3 1 Bypassed 0 1 1 255 2 2552 255d Block Bypass for block 4 12 Bypassed 0 1 255 3 255 3 255e Block Bypass for block 5 1 Bypassed 0 1 1 255 4 255 4 2551 Block Bypass for block 6 1 Bypassed 0 1 255 5 255 5 255g Block Bypass for block 7 12 Bypassed 0 1 255 6 255 6 255h Block Bypass for block 8 12 Bypassed 0 1 255 7 255 7
83. tswitch parameters are stored in bit address 13 1 and13 0 Bits 13 7 through 13 2 should be set to 0 08 MIDI Global Data Dump Request FO 00 00 OE OF 08 F7 When received the QuadraVerb 2 will respond to this message with a MIDI global data dump 07 09 MIDI Bypass or Compare FO 00 00 OE OF 09 function lt off on gt F7 function 0 BYPASS 12 COMPARE lt off on gt Oz function off 12 function on When received the QuadraVerb 2 wil respond to this message by turning BYPASS COMPARE OFF ON MIDI DSP Error Message FO 00 00 OE OF data F7 data 1 EFFECT MEMORY IS FULL 2 OUT OF LFOs 4 DSP IS FULL 8 BLOCK COMBINATION NOT ALLOWED OB MIDI Enter Message FO 00 00 OE F7 This performs the ENTER function on the current parameter It is useful for acting on flashing parameters OC MIDI User Bank 1 Program Dump FO 00 00 OE OE 0C lt prog gt data F7 lt program gt 0 99 selects individual User Bank 1 programs 100 selects edit data is the same format as the data of the User Bank 0 Dump opcode 02 Alesis QuadraVerb Il 2 00 E 21 07 19 06 OD MIDI User Bank 1 Program Dump Request FO 00 00 OE OF 0D lt program gt F7 lt program gt 0 99 selects individual user programs in User Bank 1 100 selects current edit 101 is a dump all request When received the QuadraVerb 2 will respond to this message with a MIDI user program dump 0C of the User Bank 1
84. type 0 lowpass fc BANDPASS FILTER type 1 subtype 1 bandpass fc HIGHPASS FILTER type 1 subtype 2 highpass fc LOWPASS SHELF EQ type 001 subtype 3 lowpass 1 BAND LOW PARAMETRIC type 1 subtype 4 Alesis QuadraVerb Il 2 00 E 30 07 19 06 lt O m lt Il Il speed epth shape 1 1 Jas 1 RESONATOR type e 11 tuning OS decay ii O li 62 JJ I lt l 1 lo 9 2 page J99 t CZ 1 subtype 14 Lp 1 subtype 15 CICE ee st O 1982 774 1 subtype 16 9 H 2 1 lo Ji 1 speed epth shape Q m D m O 0 lt gt gt degrees Ji egrees 7 n lt 20 lt ri Z irve level Qj col rioio o slo 20 510 51510 SA 3 lt 3 Ps gt JJ m lt Na irve level CS N D Q Q m 20 m O U gt lt O Il o o lt modulation trig 1 parm modulation trig 2 parm speed oppler istance retriggerpoint 2 1 1 255 sweeping mode 3 1 1 t trigger
85. utput channel 6 1 1 8 8 11 7 11 0 10 Digital output mode 7 1 0 1 8 12 7 12 0 11 Tap tempo footswitch 8 1 0 2 8 13 7 13 0 12 Global direct signal 9 0 1 8 14 7 14 0 QUADRAVERB 2 PROGRAM DATA FORMAT Programs contain 256 bytes of packed parameter data The first 92 bytes are common parameters for all programs The next 164 bytes depend on the number of bytes required for parameters of the effect blocks and the number of routes enabled Usually not all of these bytes are used and in this case the end of the routing is designated by OFFH OFFH Only numbers with negative offsets are in 2 s complement form Parameter name lo lim hi lim bits byte msb byte lsb PROGRAM NAME 0 Program name ASCII digit 0 32 127 8 07 00 13 Program name ASCII digit 13 32 127 8 13 7 13 0 Alesis QuadraVerb Il 2 00 E 23 07 19 06 BLOCK TYPES 14a 14b 15a 20b 21a 21b Block 1 type definition Block 1 subtype definition Block 2 type definition Block 7 subtype definition Block 8 type definition Block 8 subtype definition 0 0 0 0 0 0 4 4 4 14 7 14 5 14 4 14 0 15 7 15 5 20 4 20 0 21 7 21 5 21 4 21 0 Block type definitions are given in the next section Block type definitions The upper limit and definition for the block subtype depend on the block type The upper limit and definition for the subtype are given in the section Block subtype defintions MODULATION 22 23 24a
86. ved for future use set to O 8 89 7 89 0 90 Reserved for future use set to 0 8 90 7 90 0 9 Reserved for future use set to 0 8 91 7 91 0 Generator type 0 Envelope generator 1 Peak follower Trigger source channel 0 Left channel 1 Right channel 2 Left amp Right channels This number is multiplied by 0 04 to get the decay in seconds BLOCK PARAMETERS 92 Parameter 1 for 1st defined block MSB enm si 93 Parameter 1 for 1st defined block LSB de SE 94 Parameter 2 for 1st defined block MSB dues e Yr ME Block parameters are not stored for blocks that are off Parameters are stored in order of appearance on the Quadraverb II display by block parameter page and from left to right within the page the 1st stored parameter appears on the display at the left most block that is not off on it s 1st parameter page at the left The parameter definitions are given for each block type and subtype in the section Block parameter definitions Exists only if the block parameter requires two bytes BLOCK ROUTING 92 Route 1 position byte LSB 255 8 92 7 92 0 Alesis QuadraVerb Il 2 00 E 5 07 19 06 93 Route 1 position byte MSB O 1 1 93 7 93 7 93 Route 1 level 0 58 7 93 6 93 0 94 Route 2 position byte LSB 255 8 04 7 O4 0 This number is offset by the number of block parameter bytes that are stored An equation for calculating the

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