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GT Service Manual

1. DESCRETON wee RELEASE TD PRODUCTION ER C73 TD WIMA RIM x x D DELETED KIS7 R146 TD SIK aaueer vn E 023 27 x SH W SH Unc x ra sr ak LE LI E Ei RIGHT a RH RS mel Au p E teppe 19 5 m Jern rest nes nes ser AA nm DIG AUDIO DATA 1 0 D L I D d sd T d AS CM 1 A PCM 54 n m ls ac n 1 20 H DASP 24 o nus us A LEFT aM u22 iji sns Ea d hr ECB tense
2. 9 40 1053 T T PCB 940106 1 9 40 1053 STANDARDKNOB 941400 2 LCDBEZEL REVB PLS POWERBUTTON 971106 Pt PLS 941407 12 PLANBUTTON 94148 4 0 PLS SWITCH XTENDER 9 11 1019 211 5 LL L 5 BOT ORA DUAL POT JIA POT 00910048 1 1 RES 100 18W 5 0 00 0101 4 818284119 22 RES IK 1 8W 5 0 00 0102 19 37 69 74 78 85 90 120 123 139 MAIN RES 10K 1 8W 5 0 00 0103 23 R9 33 40 44 47 48 51 52 57 59 97 99 102 MAIN RES 100K 1 8W 5 000014 2 R194195 MAIN RES 1 8W 5 00000 3 7 0 6 11K 1 8W 5 0000112 4 181325 RES HK 5x S 2 Rea EX 1 8W 5 0 00 0122 1 7 RES 12 18W 55 0 000123 R2730193 RES 120K 18W 5 000014 7 4 MAN RES 13K 1 8W 5 00001332 1 RES fiak 18W 5 000013 2 JRM640 RES 15K 1 8W 5 0000152 2 R141990 RES 1 8W 5 000013 3 81931105 RES tek 18W 5 00006 1 JRM3 MAN RES 18 1 8W 5 0 00 0182 8 __ 163170 RES 180K 1 8W 5 000 0184 RES 200 1 8W 5 000020 3 66423 MAIN RES 2K 1 8W 5 0 00 0202 7 R 112 126 130 147 184 185 5
3. Modulation target values are dependent on the current configuration and mode of program The most significant nibble determines the function being modulated as follows REVERB MOD 1XH DELAY MOD 2XH PITCH MOD 3XH EQ MOD 4XH MIX MOD 5 MULTI TAP MOD Configuration 3 only 6XH 7XH MOD The possible modulation targets within each of the above is as follows REVERB CONFIGURATION 0 1 4 5 6 nothing in 2 3 amp 7 Target PLATE ROOM CHAMBER HALL REVERSE OOH IN MIX IN MIX IN MIX IN MIX IN MIX 01H PREDLY PREDLY PREDLY PREDLY PREDLY 02H PRE MIX PRE MIX PRE MIX PRE MIX PRE MIX 03H DECAY DECAY DECAY DECAY REV TIME 04H DIFFUSION DIFFUSION DIFFUSION DIFFUSION DIFFUSION 05H DENSITY DENSITY DENSITY LOW DEC DENSITY 06H LOW DEC LOW DEC LOW DEC HIGH DEC LOW DEC 07H HIGH DEC HIGH DEC HIGH DEC HIGH DEC DELAY CONFIGURATION 0 1 nothing in 4 amp 7 Target MONO STEREO PING PONG 10H IN MIX IN MIX IN MIX 11H DELAY L DELAY DELAY 12H FEEDB L FEEDB FEEDB 13H R DELAY 14H R FEEDB QuadraVerb GT Service Manual 19 CONFIGURATION 3 5 EQ PCH DLY Target STEREO PING PONG MULTI TAP 10H IN MIX IN MIX IN MIX IN MIX 11H DELAY L DELAY DELAY TAP 1 DELAY 12H FEEDB L FEEDB FEEDB TAP 2 DELAY 13H R DELAY TAP 3 DELAY 14H R FEEDB TAP 4 DELAY 15H TAP 5 DELAY 16H TAP 6 DELAY 17H TAP 7 DELAY 18H TAP 8 DELAY 50H TAP 1 VOLUME 51H TAP 2 VOLUME 52H TAP 3 VOLU
4. PCB LED PCB 4 FRONT PCB 6 HDW ANGLE BRACKETF P 507001 3 MAN j HDW HEATSINK 9093022 1 4 HDW SOLDERLUG PCBMNT 2903 1036 7 CLIFF JACKS EXCEPT RECEIVE HDW SWITCHBOOT 971103 1 HDW CABLEBRACKET 9413 1012 HDW RUBBERSTRIPSIN 923406 2 2 0 IG 2N5460 205540 171 Jai MAIN IG 7805 5VT0220 211705 1 12 NATONY IC 7812 12vTO20 27742 MAIN NATONLY IC 7942 2 7720 241792 1 104 NATONY IG 74HC138DEMUX 2408 1 105 MAIN TN IG 74 65733 2440573 1 PMAN MNAT 2 IG 74HC574OCTALFF 274054 5 U10113638 TN IG 74HC00 QUAD 2 IN NAND 244740 1 108 MAIN TNAT IC J 74HCU04HEXINVERTER 244743 1 4 MAIN TINAT 2 IG 74HC74 244744 1 108 MAIN 2 lt 64Kx4 10015 246464 5 U2223242520 MAIN TI SAM EUJUNEC HYUND lt 27C512 EPROM 2001 219052 1 430 VER 1 00 MAIN TUNATSIG 80C31 MPU 2 20 8031 1 JINTEL SIG IC TLO84 QUADOPAMP 2210044 9 U1267 131516 1839 MAN TI IG ISSM2120DUALVCA 221220 1 MAIN IG CEM3381VCA 22133840 1 12 MAIN CURTISS LM311 ANALOG COMP 222031 1 MAIN NATIT IG LM339 QUADCOMP 222039 1 ji 2
5. I EB RST DATA INPUTS ADDRESS INPUTS SEE p NEA Vgg P VV R 20 Ii Los Pass Fron SKE L FROM PREAMP 38 E Pen venu La T I T TLS u29 wus wz I SRAM Pan ue Fs e M REPE b E EN Nu H gt J18 1 1 osv kod vas nee amp ass Bee VEI gt gt ID UH PD R ot 249 z T reu J13 PN ja 39 ul AUDIO B ARS k EIER E SIGNAL E Ed ga Ve X poem DISPLAY J14 1 zii 4 6 THRESHOLD iin B O ne emi to 1 8 12 VDC x ce na Fav vene arr cem UM RAW 5 VDC MIDI IN UT e m pover J11 2 val 15 wes F v j E SPARES 3 ne en set skpisarp PARTS ust 1 s 12 0 M OPUS d EN TOMBE JET ecu 9 40 1050 GT_SKEe Ws PES aes ae QUADRAVERB GT La PSD E AREA PERED PROPRIETARY 9 50 1050 SED IMHOUT FFIR JNCHES 8 7 5 2 1 QuadraVerb GT Service Manual 8 2 0 Software History Date Version Comments 07108191 1 00 First production release 052202 1 01 1 Adds global cabinet simul
6. page 0 0 6 EQ PRESET 1 type 0 3 BAND EQ 1 RESONATORS EQ 2 20 999 LOW FREQUENCY 0 60 RES 1 TUNE 3 0 560 LOW BOOST CUT 0 99 RES 1 DCY 4 200 9999 MID FREQUENCY 0 99 RES 1 AMP 5 20 255 MID BANDWIDTH 0 60 RES 2 TUNE 6 0 560 MID BOOST CUT 0 99 RES 2 DCY 7 2000 18000 HIGH FREQUENCY 0 99 RES 2 AMP 8 0 560 HIGH BOOST CUT 200 9999 MID FREQUENCY 9 20 255 MID BANDWIDTH 10 0 560 MID BOOST CUT Changing preset may change the EQ type to 3 BAND EQ or RESONATOR EQ CONFIGURATION 1 LEZLIE DL REVERB page 0 0 26 HIGH ROTOR LEVEL CONFIGURATION 2 GRAPHIC EQ DELAY page 0 6 EQ PRESET 0 28 16Hz 0 28 32Hz 0 28 62Hz 0 28 126Hz 0 28 250Hz 0 28 500Hz 0 28 1KHz 0 28 2KHz 0 28 4KHz 0 28 8KHz 0 28 16KHz QuadraVerb GT Service Manual 15 CONFIGURATION 3 5 EQ PCH DLY 0 0 6 EQ PRESET 1 type 0 5 BAND EQ 1 5 RESONATOR 3 EQ 2 20 999 LOW FREQUENCY 0 4 RESO NUMBER 3 0 560 LOW BOOST CUT 0 60 RES x TUNE 4 20 500 LOW MID FREQUENCY 0 99 RES x DCY 5 20 255 LOW MID BANDWIDTH 0 99 RES x AMP 6 0 560 LOW MID BOOST CUT 20 999 LOW FREQUENCY 7 200 9999 MID FREQUENCY 0 560 LOW BOOST CUT 8 20 255 MID BANDWIDTH 200 9999 MID FREQUENCY 9 0 560 MID BOOST CUT 20 255 MID BANDWIDTH 10 2000 18000 HIGH MID FREQUENCY 11 20 255 HIGH MID BANDWIDTH 12 0 560 HIGH M
7. FEEDB CONFIGURATION 6 RESONATOR DL REV page 0 type O MONO 1 STEREO 2 PING PONG 0 198 IN MIX 0 198 IN MIX 0 198 IN MIX 2 1 720 DELAY 1 320 L DELAY 1 320 DELAY 3 0 99 FEEDB 0 99 L FEEDB 0 99 FEEDB 4 1 320 R DELAY 5 0 99 R FEEDB CONFIGURATION 7 SAMPLING 0 0 2 SAMPLE PLAYBACK 1 0 150 SAMPLE START 2 5 155 SAMPLE LENGTH 3 0 1 AUDIO TRIG 4 0 2 MIDI TRIG 5 0 127 MIDI LOW LIMIT 6 0 127 BASE NOTE 7 0 127 MIDI HIGH LIMIT PITCH FUNCTION 3 CONFIGURATION 0 EQ PCH DL REVERB amp 3 BAND EQ PCH DLY page 0 type _0 CHORUS 1 S CHORUS 2 MFLANGE 3 SFLANGE 1 0 1 INPUT 0 1 INPUT 0 1 INPUT 0 1 INPUT 2 0 1 WAVE 0 1 WAVE 0 98 SPEED 0 98 SPEED 3 0 98 SPEED 0 98 SPEED 0 98 DEPTH 0 98 DEPTH 4 0 98 DEPTH 0 98 DEPTH 0 99 FBACK 0 99 5 0 99 FBACK 0 99 FBACK 0 1 TRIGGER 0 1 TRIGGER CONFIGURATION 1 LEZLIE DL REVERB page 0 0 99 SEPARATION 1 0 1 MOTOR 2 0 1 SPEED CONFIGURATION 2 GRAPHIC EQ DELAY Not used CONFIGURATION 4 3 BAND EQ REVERB page 0 type _ 0 CHORUS OFF 1 CHORUS ON 1 0 1 WAVE 2 0 98 SPEED 3 0 98 DEPTH QuadraVerb GT Service Manual CONFIGURATION 5 RING DL REVERB page 0 1 300 SPECTRUM SHIFT 1 0 198 RING OUT MIX 2 0 198 DEL REB MIX INPUT CONFIGURATION 6 RESONATOR DL REV amp 7 SAMPLING Not used EQ FUNCTION 4 CONFIGURATION 0 EQ PCH DL REVERB
8. IG 051 ANALOG SWITCH 223401 2 108144 MAIN SUHARRIS RONSIG IC 14053 ANALOG SWITCH 223403 4 59 9 MAIN ST HARRIS RCA SIG IG J6N138 OPTO JSO 2408 1 108 MAIN RP IG PCM54 DAC 225004 1 100 BURRBROWN IC ZAK24ASIC 227005 1 2 MAIN pf IG 20K LOW PASS FILTER 720001 JAC J5PINDINJACK 400001 2 4PINDINJACK P4 400004 171 jis MAN pf 1 4 CLIFF MONO 402001 8 J237101314 J MAN LCD LCD MODULE 944111 1 FRRONTPANEL 4 1 4148 SIGNAL DIODE 200448 2 49527 MAIN 1 4003 POWER DIODE 2014003 5 102024 MAIN _ 1N5231B ZENER 2025231 1 108 MAIN MOTONY 2N4401 NPNTRANS 2034401 6 Q27 MAIN MOTNATHARRIS LED 1 3 00 0001 3 POTPCB POT LED RED T1 302401 13 POT PCB KEY __ JO ME DPDT SWITCH ALPHA 602001 ME PIEZO 700000 KEY GROUP DESCRIPTION PART POSITION MANUFACTURER NOTES 24 MHz XTAL 7 01 0006 LITHIUM 3V 7 05 0003 MAIN PANASONIC QuadraVerb GT Service Manual 27 SIDEPANEL 9031000 2 j MTL COVERPANEL 9040 2 pp MTL FRONTPANEL GT 903100 ft Mil REAR PANEL ts EE EEE PCB PCB MAINPANELREVA 940103 1 4 PCB LED 9404644 1
9. RES PITCH 1 8 DELAY MSB 4C RES PITCH 2 TAP 8 DELAY LSB 4D RES PITCH 3 TAP 8 VOLUME RES PITCH 4 8 PAN 4F RES PITCH 5 TAP 8 FEEDBACK 50 MOD 1 SOURCE 51 MOD 1 TARGET 52 MOD 1 AMPLITUDE 53 MOD 2 SOURCE 54 MOD 2 TARGET 55 MOD 2 AMPLITUDE 56 MOD 3 SOURCE 57 MOD 3 TARGET 58 MOD 3 AMPLITUDE 59 MOD 4 SOURCE 5A MOD 4 TARGET 5B MOD 4 AMPLITUDE 5C MOD 5 SOURCE 5D MOD 5 TARGET 5E MOD 5 AMPLITUDE 5F MOD 6 SOURCE 60 MOD 6 TARGET 61 MOD 6 AMPLITUDE 62 MOD 7 SOURCE 63 MOD 7 TARGET 64 MOD 7 AMPLITUDE 65 MOD 8 SOURCE 66 MOD 8 TARGET 67 MOD 8 AMPLITUDE 68 MULTITAP MASTER FEEDBACK 69 MULTITAP NUMBER 6A 1ST DIGIT NAME 6B 2ND DIGIT NAME 6C 3RD DIGIT NAME 6D 4TH DIGIT NAME 6E 5TH DIGIT NAME 6F 6TH DIGIT NAME 70 7TH DIGIT NAME 71 8TH DIGIT NAME 72 9TH DIGIT NAME 73 10TH DIGIT NAME 74 11TH DIGIT NAME 75 12TH DIGIT NAME 76 13TH DIGIT NAME 77 14TH DIGIT NAME 78 RING MOD OUTPUT MIX RES 2 AMP 79 RING MOD DEL REV RES 3 7A PAN SPEED 7B PAN DEPTH EQ MODE 7 COMPRESSION 4 6 DISTORTION 30 7D MIX MODULATION 6 7 EFFECT LOOP 5 BASS 3 2 CAB 1 0 OVERDRIVE 7 5 NOISE GATE 4 0 7F PREAMP OUTPUT LEVEL BOOST 4 AM RES Resonator parameters in QUAD and 3 BAND EQ REVERB modes RES Resonator parameters in 5 BAND EG PITCH DELAY mode RES Resonator parameters in RESONATOR DELAY REVERB mode Qu
10. 0 99 R FEEDB CONFIGURATION 1 LEZLIE DL REVERB page 0 type O MONO 1 STEREO 2 PING PONG 1 0 198 IN MIX 0 198 IN MIX 0 198 IN MIX 2 1 800 DELAY 1 400 L DELAY 1 400 DELAY 3 0 99 FEEDB 0 99 L FEEDB 0 99 FEEDB 4 1 400 R DELAY 5 0 99 R FEEDB 2 2 GRAPHIC 0 0 1 2 PING PONG 1 0 1 INPUT 0 1 INPUT 0 1 INPUT 2 1 1500 DELAY 1 750 L DELAY 1 750 DELAY 3 0 99 FEEDB 0 99 L FEEDB 0 99 FEEDB 4 1 750 R DELAY 5 0 99 R FEEDB CONFIGURATION 3 BBAND EQ PCH DLY page 0 0 MONO 1 STEREO 2 PING PONG 3 MULTI TAP 0 1 INPUT 0 1 INPUT 0 1 INPUT 1 INPUT 0 198 IN MIX 0 198 IN MIX 0 198 IN MIX 198 IN MIX 1 1470 DELAY 0 99 FEEDB 1 705 L DELAY 0 99 L FEEDB 1 705 R DELAY 0 99 R FEEDB O1 gt Q N Sum off Z for all 8 taps less or equal to 1470 x Number of currently selected tap CONFIGURATION 4 3 BAND EQ REVERB Not used QuadraVerb GT Service Manual 1 705 DELAY 0 99 FEEDB 0 0 1 8 TAP NUMBER 1 7 TAP x DELAY 0 99 TAP x VOLUME 0 198 TAP x PANNING 0 99 TAP x FEEDBACK 0 99 MASTER FEEDBACK CONFIGURATION 5 RING DL REVERB page 0 type 0 MONO 1 STEREO 2 PING PONG 1 0 198 IN MIX 0 198 IN MIX 0 198 IN MIX 2 1 800 DELAY 1 400 L DELAY 1 400 DELAY 3 0 99 FEEDB 0 99 L FEEDB 0 99 FEEDB 4 1 400 R DELAY 5 0 99
11. 12 ms UK fees s600pr hs gt HIN Y ws ger VER Sn L met SEND SERIE VEN 1908 17 4 cout Bly s os I 9 eat ug 1 J PES se 27009 V VV 220 say Rss 5 ZU 5 eR WAV i v AM asas al s 2 al 5 2m CABINET ON CABINET 1 2 gn 19125456714 gt 59 gt ji 1 BR IVV FROM U4 PIN 3 DIST 01512 DI L lt lt Ray hs aa AA U9 laa out cs RM bes 5 Cout lt iur 22005 oe w GE Sel lt gt al ae gt Rt ON gt 1 19 m aS 2 Tone pw Vl T KS PRESENCE BRICHT ON OFF Ser SEPARATE PARTS U 9 40 1050 SSK APPROVALS pum MLE HOLDREGE AVE 1 OS ANGELES CA 90016 8 22 91 213 467 8000 PROD 213 t 9 50 1050 TH DOCUMENT CONTAINS INFORMATION CONSIDERED PROPRIETARY SHALL NOT Be REPRODUCED NOR DISCLOSED VTHOUT PRIOR SPECIFIC WETTEN PERMISSION FROM ALESIS CORP UNTS INCHES s r d 2 8 7 6 5 3 2 1 QuadraVerb GT Service Manual 1
12. C731071000 FIL 2200 PFFILM 120022 2 105960 MAIN 2 FL Joo22MFFLM 120023 1 06 MAIN WMA FIL 2700 PFFILM 1 20 0272 2 161816 MAIN 2 FIL 330 PFFILM 120091 1 104 13300 PFFILM 1200332 2 4460 MAIN WMA FIL 0 033 FILM 1203 1 C24 MAIN FIL 15600 PFFILM 120052 2 101417 14PINDIL 0 1 SPC 4 14 0014 2 P HDR 06PINSIL 0 1 SPC 415006 1 p EDPCB PMN HDR 06PINSIL SHROUDED 415007 2 5 J MAN 048HROUD 12 PIN SIL SHROUDED 4 15 0012 HDR 12PINSILRA SHROUDED 415003 1 Por 15 HDR 06PINSILRA 019 415106 TOP 7 BOT 7 R PANEL 4 EP NE HDW 16 32x1 4 PF BLKUNC 505004 4 J FRONTPANEL BEZEL SCREW 500002 4 WIBEZEL 4PER TOP PCB 7 BOT PCB 6 _ HDW 46 STAR 5 01 0002 3 HEATSINK STANDOFES HDW NYLON SPACER 0 095 501007 6 FRONT PCB 4 LED PCB 2 FEE IN 2 OUT 2 ADV BYP SND GROUP DESCRIPTION jPOSTION PCB MANUFACTURER NOTES QuadraVerb GT Service Manual 26 HDW NYLON WASHER 0 050 501000 1 SRD STANDOFFONSINK HDW _ 6 32 1 2 STANDOFF 5 02 0003 4 HEATSINK 3 FRONT PANEL 24 HDW 32x18TANDOFF 5 02 0004 2 INDENTEDPCB pf
13. CONTROL VOLTAGE 05 Vw U4 FIN 5 7 ois RIAL vu 574 W ute PN 5 18 By 5 1 is RIGHT 15 pot gt INPUT 5 18 dS US PIN 9 amp 10 GND Sel vr a T gt T 11 6 9 Sree Q Ibo afa tone onyore 25 SEL 0 input X ted 4 vi low 0 input X is connecte FROM FIN 10 with SEL high 1 Input Y is connected Avr so II AAA 44 7 a EL f V s 15 gt coo z comes mo 155 AVE 10uF 2 DIST ON P gt x a 14 EL Elm o TONE PRESENCE BRIGHT n i COMP W A 5 12 lt 71 WDIST 3 C i Threshold 54 vist 2 V U39 FIN 1 5 i our sae 04 E 057 1 Sess GND Had 2 4 og GASS Boost 6 m i 5 18 R Slo Q 1 2 an il pu CABINET ON E A BND PE LOOP o pe vss PIN 9 vit PIN 12 t asv 77 2 1 2 Rez OVERDRIVE lt i H Te Tr GPL id a EL Her us f lex 55 2120 11 sat 13 Tv Us e now E RETURN 56 css UIS PIN 5 AA OVERDRIVE pu 5 AA UIT dodos A it J gt US ay gt US oy 3 Tr BAE L4 RT 5 oy MI 792 VW rv 3 cout aci l R24 B LAN ma 39 BIK Jr BASS BOOST ps NY 5V
14. Implementation 10 4 0 GT Service Parts dahon 26 Service Manual MS ON a a eee 30 ee 31 QuadraVerb GT Service Manual 6 1 0 Schematics Rev DESCRETON DATE APPROVED RELEASE TO PRODUCTION 6 19 91 ADDED LABELS 7 11 91 A 3 4 C 2 B CORRECTED R97 R98 8 22 9 LEFT s LABEL OF JUMP 1 0 INPUT S J NAN To DRY UIZ PIN 3 av 5 gt cse 2107 912 Jur 415 iso AMS 886 OVERDRNE D NN VCA AV DR VEN 2 ONS 5V 12 y uu R116 15K
15. R136209 pf m RES 560 1 8W 5 0 00 0561 2 R171 172 MAIN RES 56K 1 8W 5 0 00 0562 2 887 143 MAN RES 56K 1 8W 5 0 00 53 3 R7980 91 RES 620 1 8W 5 0 00 0621 1 8109 MAIN pf RES 6 2 1 8W 5 0 00 0623 1 8192 0 0 0 0 0 0 0 0 0 0 RES 1680 1 8W 5 0 00 0681 1 5121 MAIN RES 6 8K 1 8W 5 0 00 0682 6 R12 49 60 95 115 206 0 0 0 0 0 0 0 00 I 750 1 8W 5 0 00 0751 3 R61 66 154 MAN pf 4 RES 7 5 1 8W 5 0 00 0752 3 R15 24 88 MAIN pf m RES 75K 1 8W 5 0 00 0753 2 R21142 MAIN RES 750 1 8W 5 0 00 0754 1 8150 MAN RES 82 1 8W 5 0 00 0822 R111 138 198 MAN RES 82K 1 8W 5 0 00 0823 1 R204 MAIN RES 910 1 8W 5 0 00 0911 1 MAN RES 1 8W 5 RES 91K 1 8W 5 0 00 0912 4 R262877 89 MAN 0 00 0913 1 8146 MAIN RUB KEYPAD 923105 1 14 Soc 18PINDIP03 404008 5 26 2 SOC 22PINDIPO3 404022 1 JU4 MAN Soc 28PINDIPO6 4060028 3 202 0 Soc 40PINDIPOG 4600 1 SOC 84PINASICSOCKET 412 0084 MAN C L QuadraVerb GT Service Manual 29 Service Manual History 10 17 95 V1 00 First release QuadraVerb GT Service Manual 30 CAB SIMULATOR COMPRESSION DIRECT LEVEL DISTORTION Nesen 25 F FEEDBACK vi 25 a
16. 20K 1 8W 5 0 00 0203 15 R34 35 42 45 50 63 101 124 127 128 131 144 MAIN 179 189 200 RES 220 1 8W 5 0 00 0221 10 R156 157 160 161 174 177 196 201 203 MAIN 1 RES 22 1 8W 5 0 00 0222 2 1R16 56 MAIN RES 220 1 8W 5 0 00 0224 3 1R11 20 75 MAIN RES 22 1 8W 5 0 00 0225 1 JR155 RES 27 1 8W 5 0 00 0273 1 8114 MAIN RES 300 1 8W 5 0 00 0301 1 R108 MAIN RES 3K 1 8W 5 0 00 0302 1 R191 0 GROUP DESCRIPTION PART POSITION MANUFACTURER NOTES RES 30K 1 8W 5 0 00 0303 6 R43 46 53 70 72 103 RES 300 1 8W 5 0 00 0304 MAIN RES 3 3 1 8W 5 0 00 0332 5 R32 94 110 162 182 MAIN QuadraVerb GT Service Manual 28 RES 330K 1 8W 5 0 00 0334 1 R145 MAN RES 36K 1 8W 5 0 00 0363 3 13 22 39 MAN RES 3 9K 1 8W 5 0 00 0392 3 R182593 MAN 0 0 0 0 0 0 0 RES 39K 1 8W 5 0 00 53 3 1R55 64 197 RES 390K 1 8W 5 0 00 0394 2 841 149 MAN RES 47 1 8W 5 0 00 0470 3 R65 76 106 MAN RES 470 1 8W 5 0 00 0471 8 R7 10 151 152 153 158 175 178 MAN 1 RES 4 7K 1 8W 5 RES 47K 1 8W 5 RES 470K 1 8W 5 0 00 0472 11 R38 92 125 129 141 181 183 186 188 MAIN 210 213 0 00 0473 3 R36 62 118 MAIN 0 00 0474 3 813 73 MAIN RES 51K 1 8W 5 0 00 0513 2 R137 140 MAN 1 510K 1 8W 596 0 000514 2
17. 6 page 32 127 1st DIGIT NAME 32 127 2nd DIGIT NAME 32 127 3rd DIGIT NAME 32 127 4th DIGIT NAME 32 127 5th DIGIT NAME 32 127 6th DIGIT NAME 32 127 7th DIGIT NAME 32 127 8th DIGIT NAME 32 127 9th DIGIT NAME 32 127 10th DIGIT NAME 10 32 127 11th DIGIT NAME 11 32 127 12th DIGIT NAME Q OO N 42 32 127 13th DIGIT NAME 13 32 127 14th DIGIT NAME 14 0 126 MOD 1 SOURCE 15 0 2 MOD 1 TARGET 16 0 198 MOD 1 AMPLITUDE 17 0 126 MOD 2 SOURCE 18 0 2 MOD 2 TARGET 19 0 198 MOD 2 AMPLITUDE 20 0 126 MOD 3 SOURCE 21 0 MOD TARGET 22 0 198 MOD AMPLITUDE 23 0 126 MOD 4 SOURCE 24 0 MOD 4 TARGET 25 0 198 MOD 4 AMPLITUDE 26 0 126 MOD 5 SOURCE 27 0 MOD 5 TARGET 28 0 198 MOD 5 AMPLITUDE 29 0 126 MOD 6 SOURCE 30 0 MOD 6 TARGET 31 0 198 MOD 6 AMPLITUDE 32 0 126 MOD 7 SOURCE 33 0 MOD 7 TARGET 34 0 198 MOD 7 AMPLITUDE 35 0 126 MOD 8 SOURCE 36 0 MOD 8 TARGET 37 0 198 MOD 8 AMPLITUDE QuadraVerb GT Service Manual CONFIGURATION 7 SAMPLING page 32 127 1st DIGIT NAME 32 127 2nd DIGIT NAME 32 127 3rd DIGIT NAME 32 127 4th DIGIT NAME 32 127 5th DIGIT NAME 32 127 6th DIGIT NAME 32 127 7th DIGIT NAME 32 127 8th DIGIT NAME 32 127 9th DIGIT NAME 32 127 10th DIGIT NAME 10 32 127 11th DIGIT NAME 11 32 127 12th DIGIT NAME 12 32 127 13th DIGIT NAME 13 32 127 14th DIGIT NAME
18. 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 QuadraVerb GT Service Manual 3 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 Power Source The product should only be connected to power supply which is described either in the operating instructions or in markings on the product 2 Power Cord Protection AC power supply cords should be placed such that no one is likely to step on the cords and such that nothing will be placed on or against them 3 Grounding the Plug This product has 3 wire grounding type of plug plug with 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 4 Periods of Non use If the produc
19. EED CONFIGURATION 1 LEZLIE DL REVERB 0 0 99 DIRECT LEVEL 0 99 MASTER FX LEVEL 1 2 0 99 LEZLIE LEVEL 3 0 99 DELAY LEVEL 4 0 99 REVERB LEVEL CONFIGURATION 2 GRAPHIC EQ DELAY page 0 0 99 DIRECT LEVEL 0 99 MASTER FX LEVEL 1 2 0 99 EQ LEVEL 3 0 99 DELAY LEVEL CONFIGURATION 3 5 EQ PCH DLY 0 0 99 DIRECT LEVEL 1 0 99 MASTER FX LEVEL 2 type _ 0 PRE EQ 1 POST EQ 3 0 99 PREAMP LEVEL 0 99 EQ LEVEL 4 0 99 PITCH LEVEL 0 99 PITCH LEVEL 5 0 99 DELAY LEVEL 0 99 DELAY LEVEL 6 0 1 MODULATION 0 1 MODULATION 7 0 99 MOD DEPTH 0 99 MOD DEPTH 8 0 98 MOD SPEED 0 98 MOD SPEED CONFIGURATION 4 3 BAND EQ REVERB page 0 0 99 DIRECT LEVEL 1 0 99 MASTER FX LEVEL 2 type 1 POST EQ 3 0 99 PREAMP LEVEL 4 0 99 REVERB LEVEL 0 99 EQ LEVEL 0 99 REVERB LEVEL CONFIGURATION 5 RING DL REVERB page 0 0 99 DIRECT LEVEL 1 0 99 MASTER FX LEVEL 2 0 99 PREAMP LEVEL 3 0 99 RING MOD LEVEL 4 0 99 DELAY LEVEL 5 0 99 REVERB LEVEL QuadraVerb GT Service Manual 17 CONFIGURATION 6 RESONATOR DL REV page O0 0 99 DIRECT LEVEL 1 0 99 MASTER FX LEVEL 2 0 99 PREAMP LEVEL 3 0 99 RESONATOR LEVEL 4 0 99 DELAY LEVEL 5 0 99 REVERB LEVEL CONFIGURATION 7 SAMPLING page 0 0 99 DIRECT LEVEL 1 0 99 PREAMP LEVEL 2 0 99 PLAYBACK LEVEL MOD FUNCTION 9 CONFIGURATION 0
20. EPTH MOD DEPTH 47H MOD SPEED MOD SPEED CONFIGURATION 1 LEZLIE DL REVERB Target 40H DIRECT LEVEL 41H FXLEVEL 42H LEZLIE LEVEL 43H DELAY LEVEL 44H REVERB LEVEL QuadraVerb GT Service Manual 22 CONFIGURATION 2 GRAPHIC EQ DELAY Target 40H DIRECT LEVEL 41H FXLEVEL 42H EQ LEVEL 43H DELAY LEVEL CONFIGURATION 3 5 EQ PCH DLY Target PRE EQ POST EQ 40H DIRECT LEVEL DIRECT LEVEL 41H FX LEVEL FX LEVEL 42H PREAMP LEVEL EQ LEVEL 43H PITCH LEVEL PITCH LEVEL 44H DELAY LEVEL DELAY LEVEL 45H MOD DEPTH MOD DEPTH 46H MOD SPEED MOD SPEED CONFIGURATION 4 3 BAND EQ REVERB Target PRE EQ POST EQ 40H DIRECT LEVEL DIRECT LEVEL 41H FX LEVEL FX LEVEL 42H PREAMP LEVEL EQ LEVEL 43H REVERB LEVEL REVERB LEVEL CONFIGURATION 5 RING DL REVERB Target 40H DIRECT LEVEL 41H FXLEVEL 42H PREAMP LEVEL 43H RING LEVEL 44H DELAY LEVEL 45H REVERB LEVEL CONFIGURATION 6 RESONATOR DL REV Target 40H DIRECT LEVEL 41H FXLEVEL 42H PREAMP LEVEL 43H RESONATOR LEVEL 44H DELAY LEVEL 45H REVERB LEVEL CONFIGURATION 7 SAMPLING Not used PREAMP CONFIGURATION 0 1 2 3 4 5 6 Target 70H PREAMP OUT LEVEL CONFIGURATION 7 SAMPLING Not used QuadraVerb GT Service Manual 23 PRE AMP FUNCTION 10 CONFIGURATION 0 6 page 0 7 COMPRESSION 0 7 OVERDRIVE 0 8 DISTORTION 0 2 PREAMP TONE 0 1 BASS BOOST 0 2 CAB SIMULATOR 0 1 EFFECT LOOP 0 17 NOISE GATE 0 99 PREAMP OUTP
21. H 22 LEZLIE SEPARATION TAP 1 FEEDBACK 23 LEZLIE MOTOR SAMPLE REC AUDIO TRIG TAP 2 DELAY MSB 24 LEZLIE SPEED SAMPLE MIDI TRIG TAP 2 DELAY LSB 25 TRIGGER FLANGE RES MIDI GATE 26 SAMPLE MIDI BASE NOTE TAP 2 VOLUME 27 DELAY MODE 28 DELAY INPUT 0 RES 5 AMP 1 7 29 DELAY INPUT MIX 2A DELAY MSB LEFT DELAY MSB TAP 2 PAN 2B DELAY LSB LEFT DELAY LSB TAP 2 FEEDBACK 2C FEEDBACK LEFT FEEDBACK TAP 3 DELAY MSB 2D RIGHT DELAY MSB TAP 3 DELAY LSB 2E RIGHT DELAY LSB TAP 3 VOLUME 2F RIGHT FEEDBACK TAP 3 PAN 30 SAMPLE LOW MIDI NOTE TAP 3 FEEDBACK 31 SAMPLE HIGH MIDI NOTE TAP 4 DELAY MSB 32 REVERB MODE TAP 4 DELAY LSB 33 TAP 4 VOLUME 34 REVERB INPUT 1 TAP 4 PAN 35 REVERB INPUT 2 TAP 4 FEEDBACK 36 REVERB INPUT MIX TAP 5 DELAY MSB 37 REVERB PREDELAY TAP 5 DELAY LSB 38 REVERB PREDELAY MIX TAP 5 VOLUME 39 REVERB DECAY TAP 5 PAN 3A REVERB DIFFUSION TAP 5 FEEDBACK 3B REVERB LOW DECAY TAP 6 DELAY MSB 3C REVERB HIGH DECAY TAP 6 DELAY LSB 3D REVERB DENSITY TAP 6 VOLUME 3E REVERB GATE TAP 6 PAN REVERB GATE HOLD TAP 6 FEEDBACK 40 REVERB GATE RELEASE TAP 7 DELAY MSB 41 REVERB GATED LEVEL TAP 7 DELAY LSB 42 RING MOD SHIFT MSB TAP 7 VOLUME 43 RING MOD SHIFT LSB 7 PAN 44 CONFIGURATION 45 PRE POST EQ 0 DIRECT LEVEL 1 7 46 PREAMP LEVEL EQ LEVEL 47 MASTER EFFECTS LEVEL 48 PITCH LEVEL LEZLIE LEVEL RING MOD LEV 49 DELAY LEVEL 4A REVERB LEVEL RES 1 AMP
22. IC EQ DELAY 3 BAND EQ PCH DLY 7 SAMPLING Not used CONFIGURATION 4 3 BAND EQ REVERB 4 REVERSE 1 0 2 INPUT 1 page 0 type _ O PLATE2 _ 1 ROOM 2 2 CHAMBER 2 3 HALL 2 4 REVERSE 2 1 0 1 INPUT 0 1 INPUT 0 1 INPUT 0 1 INPUT 0 1 INPUT 2 1 140 PREDLY 1 140 PREDLY 1 140 PREDLY 1 140 PREDLY 1 140 PREDLY 3 1 198 PRE MIX 1 198 PRE MIX 1 198 PRE MIX 1 198 PRE MIX 1 198 PRE MIX 4 0 99 DECAY 0 99 DECAY 0 99 DECAY 0 99 DECAY 0 99 REV TIME 5 0 8 DIFFUSION 0 8 DIFFUSION 0 8 DIFFUSION 0 8 DIFFUSION 0 8 DIFFUSION 6 0 8 DENSITY 0 8 DENSITY 0 8 DENSITY 0 60 LOW DEC 0 8 DENSITY 7 0 60 LOW DEC 0 60 LOW DEC 0 60 LOW DEC 0 60 HIGH DEC 0 60 LOW DEC 8 0 60 HIGH DEC 0 60 HIGH DEC 0 60 HIGH DEC 0 1 GATE ON 0 60 HIGH DEC 9 0 1 ON 0 1 ON 0 1 0 99 GATE HLD 10 0 99 HLD 0 99 0 99 HLD 0 99 GATE REL 11 0 99 REL 0 99 REL 0 99 0 99 GATE LEV 12 0 99 LEV 0 99 LEV 0 99 LEV DELAY FUNCTION 2 CONFIGURATION 0 EQ PCH DL REVERB page QuadraVerb GT Service Manual 0 type 0 1 STEREO 2 PING PONG 1 0 1 INPUT 1 0 1 INPUT 1 0 1 INPUT 1 2 0 198 IN MIX 0 198 IN MIX 0 198 IN MIX 3 1 775 DELAY 1 375 L DELAY 1 375 DELAY 4 0 99 FEEDB 0 99 L FEEDB 0 99 FEEDB 5 1 375 R DELAY 6
23. ID BOOST CUT 13 2000 18000 HIGH FREQUENCY 14 0 560 HIGH BOOST CUT 0 560 MID BOOST CUT 2000 18000 HIGH FREQUENCY 0 560 HIGH BOOST CUT Changing preset may change the EQ type to 5 BAND EQ or 5 RESONATOR 3 EQ X is the current resonator number CONFIGURATION 4 3 BAND EQ REVERB page 0 0 6 EQ PRESET 1 20 999 LOW FREQUENCY 2 0 560 LOW BOOST CUT 3 200 9999 FREQUENCY 4 20 255 BANDWIDTH 5 0 560 MID BOOST CUT 6 2000 18000 HIGH FREQUENCY 7 0 560 HIGH BOOST CUT CONFIGURATION 6 RESONATOR DL REV page 0 RESONATOR GATE MODE 0 1 0 99 RESONATOR DECAY 0 60 RESONATOR 1 TUNE 0 60 RESONATOR 2 TUNE 0 60 RESONATOR 3 TUNE 0 60 RESONATOR 4 TUNE 0 60 RESONATOR 5 TUNE YS YS Sw CONFIGURATION FUNCTION 7 page 0 0 7 CONFIGURATION 0 EQ gt PCH gt DL gt REVERB 1 LEZLIE gt DL gt REVERB 2 GRAPHIC EQ gt DELAY 3 5BAND EQ gt PCH gt DLY 4 3 BAND EQ gt REVERB 5 RING gt DL gt REVERB 6 RESONATOR gt DL gt REV 7 SAMPLING QuadraVerb GT Service Manual MIX FUNCTION 8 CONFIGURATION 0 EQ PCH DL REVERB page 0 0 99 DIRECT LEVEL 1 0 99 MASTER FX LEVEL 2 type 0 1 POST EQ 3 0 99 PREAMP LEVEL 0 99 EQ LEVEL 4 0 99 PITCH LEVEL 0 99 PITCH LEVEL 5 0 99 DELAY LEVEL 0 99 DELAY LEVEL 6 0 99 REVERB LEVEL 0 99 REVERB LEVEL 7 0 1 MODULATION 0 1 MODULATION 8 0 99 MOD DEPTH 0 99 MOD DEPTH 9 0 98 MOD SPEED 0 98 MOD SP
24. ME 53H TAP 4 VOLUME 54H TAP 5 VOLUME 55H TAP 6 VOLUME 56H TAP 7 VOLUME 57H TAP 8 VOLUME 58H TAP 1 PANNING 59H TAP 2 PANNING 5AH TAP 3 PANNING 5BH TAP 4 PANNING 5CH TAP 5 PANNING 5DH TAP 6 PANNING 5EH TAP 7 PANNING 5FH TAP 8 PANNING 60H TAP 1 FEEDBACK 61H TAP 2 FEEDBACK 62H TAP 3 FEEDBACK 63H TAP 4 FEEDBACK 64H TAP 5 FEEDBACK 65H TAP 6 FEEDBACK 66H TAP 7 FEEDBACK 67H TAP 8 FEEDBACK 68H MASTER FEEDBACK CONFIGURATION 2 5 6 Target MONO STEREO PING PONG 10H DELAY L DELAY DELAY 11H FEEDB L FEEDB FEEDB 12H R DELAY 13H R FEEDB PITCH CONFIGURATION 0 amp 3 nothing in 2 amp 7 Target M CHORUS S CHORUS M FLANGE S FLANGE DETUNE PHASER 20H SPEED SPEED SPEED SPEED DETUNE SPEED 21H DEPTH DEPTH DEPTH DEPTH DEPTH 22H FBACK FBACK FBACK FBACK CONFIGURATION 1 LEZLIE DL REVERB Target 20H SEPARATION 21H MOTOR 22H SPEED QuadraVerb GT Service Manual 20 CONFIGURATION 4 3 BAND EQ REVERB Target 20H SPEED 21H DEPTH CONFIGURATION 5 RING DL REVERB Target 20H SPECTRUM SHIFT 21H RING OUTPUT MIX 22H DEL REV IN MIX CONFIGURATION 6 RESONATOR DL REV Target 20H RESONATOR DECAY EQ CONFIGURATION 0 EQ PCH DL REVERB Target EQ mode 3 BAND EQ RESONATORS EQ 30H LOW EQ FREQUENCY RES 1 DECAY 31H LOW EQ BOOST CUT RES 1 AMP 32H MID EQ FREQUENCY RES 2 DECAY 33H MID EQ BANDWIDTH RES 2 AMP 34H MID EQ BOOST CUT MID EQ FREQUENCY 35H HIGH EQ FREQUENCY MID EQ BANDWIDTH 36H HIGH EQBOOST CUT MID EQ B
25. OOST CUT CONFIGURATION 1 LEZLIE DL REVERB Target 30H HIGH ROTOR LEVEL CONFIGURATION 2 GRAPHIC EQ DELAY Target 30H 16Hz 32Hz 32H 62Hz 33H 126Hz 34H 250Hz 35H 500 2 36H 1KHz 37H 2KHz 38H 4KHz 39H 8KHz 16KHz QuadraVerb GT Service Manual 21 CONFIGURATION 3 5 EQ PCH DLY Target EQ mode 5 BAND EQ 5 RESONATOR 3 EQ 30H LOW EQ FREQUENCY RES 1 DECAY 31H LOW EQ BOOST CUT RES 1 AMP 32H LOW EQMID FREQUENCY RES 2 DECAY 33H LOW EQ MID BANDWIDTH RES 2 AMP 34H LOW EQ MID BOOST CUT RES 3 DECAY 35H MID EQ FREQUENCY RES 3 AMP 36H MID EQ BANDWIDTH RES 4 DECAY 37H MID EQ BOOST CUT RES 4 AMP 38H HIGH MID EQ FREQUENCY RES 5 DECAY 39H HIGH MID EQ BANDWIDTH LOW EQ FREQUENCY 3AH HIGH MID EQ BOOST CUT LOW EQ BOOST CUT 3BH HIGH EQ FREQUENCY MID EQ FREQUENCY 3CH HIGH EQ BOOST CUT MID EQ BANDWIDTH 3DH MID EQ BOOST CUT 3EH HIGH EQ FREQUENCY 3FH HIGH EQ BOOST CUT CONFIGURATION 4 3 BAND EQ REVERB Target 30H LOW EQ FREQUENCY 31H LOW EQ BOOST CUT 32H MID EQ FREQUENCY 33H MID EQ BANDWIDTH 34H MID EQ BOOST CUT 35H HIGH EQ FREQUENCY 36H HIGH EQBOOST CUT CONFIGURATION 6 RESONATOR DL REV Not used CONFIGURATION 5 amp 7 Not used MIX CONFIGURATION 0 EQ PCH DL REVERB Target PRE EQ POST EQ 40H DIRECT LEVEL DIRECT LEVEL 41H FX LEVEL FX LEVEL 42H PREAMP LEVEL EQ LEVEL 43H PITCH LEVEL PITCH LEVEL 44H DELAY LEVEL DELAY LEVEL 45H REVERB LEVEL REVERB LEVEL 46H MOD D
26. QuadraVerb GT Service Manual Revision 1 00 10 17 95 QuadraVerb GT Service Manual 1 PREFACE This document is intended to assist the service technician in the operation maintenance and repair of the QuadraVerb GT guitar effects processor This unit represents one of the building blocks of the complete ADAT system Together with the QuadraVerb GT Reference Manual this document provides complete description of the functionality and serviceability of the QuadraVerb GT Any comments or suggestions you may have pertaining to the document are welcome and encouraged READ THIS In addition to any purchase price that Alesis may charge as consideration for Alesis selling or otherwise transferring this service manual Manual to you if you are not service and repair facility Service Center authorized by Alesis in writing to be an authorized Service Center Alesis sells or transfers the Manual to you on the following terms and conditions Only Service Centers authorized by Alesis in writing are authorized to perform service and repairs covered by an Alesis warranty if any and transfer of the Manual to you does not authorize you to be an authorized Service Center Therefore if you perform or if the Manual is used to perform any service or repairs on any Alesis product or part thereof any and all warranties of Alesis as to that product and any service contract with Alesis for that product shall be voided and shall no lon
27. UT LEVEL O00 gt QO N O CONFIGURATION 7 SAMPLING 7 COMPRESSION 7 OVERDRIVE 8 DISTORTION 2 PREAMP TONE 1 BASS BOOST 2 CAB SIMULATOR 1 EFFECT LOOP 0 0 0 0 0 0 0 0 17 NOISE GATE QuadraVerb GT Service Manual 24 PARAMETER ADDRESSES WITHIN PROGRAMS 00 LOW EQ FREQ MSB RES 1 TUNE 01 LOW EQ FREQ LSB RES 1 DECAY 16Hz 02 LOW EQ AMP MSB RES 1 AMP 32Hz 03 LOW EQ AMP LSB RES 2 TUNE 62Hz 04 MID EQ FREQ MSB 126Hz 05 MID EQ FREQ LSB 250Hz 06 MID EQ BANDWIDTH 500Hz 07 MID EQ AMP MSB 1KHz 08 MID EQ AMP LSB 2KHz 09 HIGH EQ FREQ MSB RES 2 DECAY 4KHz 0A HIGH EQ FREQ LSB RES 2 AMP 8KHz 0B HIGH EQ AMP MSB 16KHz 0C HIGH EQ AMP LSB OD LEZLIE HIGH ROTOR LEVEL 1 DELAY MSB OE LOW MID EQ FREQ MSB RES 1 TUNE OF LOW MID EQ FREQ LSB RES 1 DECAY 10 LOW MID EQ BANDWIDTH RES 2 TUNE 11 LOW MID EQ AMP MSB RES 2 DECAY 12 LOW MID EQ AMP LSB RES 3 TUNE 13 HIGH MID EQ FREQ MSB RES 3 DECAY 14 HIGH MID EQ FREQ LSB 5 4 TUNE 15 HIGH MID EQ BANDWIDTH RES 4 DECAY 16 HIGH MID EQ AMP MSB RES 5 TUNE 17 HIGH MID EQ AMP LSB RES 5 DECAY 18 SAMPLE START TAP 1 DELAY LSB 19 SAMPLE LENGTH TAP 1 VOLUME 1A PITCH MODE 1B PITCH INPUT 0 RES 4 AMP 1 7 1C LFO WAVEFORM 0 EQ PRESET NUMBER 1 7 1D LFO SPEED LFO DEPTH RES DECAY 1F SAMPLE PLAYBACK MODE TAP 1 PAN 20 PITCH FEEDBACK 21 DETUNE AMOUNT SAMPLE PITC
28. adraVerb GT Service Manual 25 4 0 GT Service Parts List GROUP DESCRIPTION QTY PCB MANUFACTURER NOTES ASS PCB GTMAINASSY 82004 1 MAINBOARD ASSEMBLY ASS PCB GTLEDASSY 820005 1 FRONT PANEL LED BOARD ASSEMBLY 2 14 PIN DIL 14IN 3 CON 4 18 1414 1 8RD CONN 90mm FROMEND CAB 12PINSILOIN 44 19 0312 2 446 48 CAB 06PINSILOGIN 14190606 1 LEDPCB JG 12PINSIL CUSTOM3 6IN 419062 1 POTPCB J4J5 CAP 0 47MFELECSOV 57 44 1 7 MFELEC2SV 15500 6 122 244 MN 10 gt 6 1 09 0105 2 101827 4 7 MF ELEC 25V 1 09 0475 C3 4 8 11 21 30 31 36 37 40 47 53 57 64 MAIN 65 115 116 122 123 CAP 1470 MFELEC 25 109047 CAIN 2 CAP 1000MFELEC25SV 1 09 1000 4 7 MAIN PG CER 100 PFCERDISC 1 02 0101 2 104346 MAIN 87 96 100 102 104 105 109 110 117 CER 150 PECERDISC 1 02 0151 2 16108106 er 180 BF GERDISG rooe amp Joss an oO CER 20 PFCERDISC 102020 5 138759 CER 2200 PF CERDISC 102022 167208 CER 43 PFCERDISC 102040 8 10788 FIL 1000 PFFILM 1 20 0102 1 1068 h B MAN WMA FL 1001 MFFILM 120010 10 C569 10222334354851 MAN FL MFFILM 120014 3 J
29. ator controls 2 Fixes erroneous setting of preamp parameters when a program using the sampling configuration is recalled 3 Fixes distorted audio when a program using the reverb configuration has its reverb chorus speed or depth modulated via MIDI 1 02 Never released 102892 1 03 New set of factory programs QuadraVerb GT Service Manual 9 3 0 MIDI Implementation System Exclusive Format The Quadraverb GT MIDI System Exclusive message format is as follows FO System exclusive status 00 00 OE Alesis manufacturer id 07 Quadraverb GT id cc Opcode dd Data F7 End Of Exclusive OPCODES 01 MIDI Editing FO 00 00 OE 07 01 lt function gt lt page gt lt value1 gt lt value2 gt lt value3 gt F7 lt function gt 1 reverb 2 delay 3 pitch 4 eq 7 config 8 mix 9 name mod 10 preamp lt gt 0 where n is the maximum page for the selected function lt value1 3 gt new parameter value in the following format Data B7 B6 B5 B4 B3 B2 B1 MSB 5 4 2 A1 AO LSB Sent 0 A7 A6 A5 4 2 A1 lt value1 gt 0 AO B7 B6 B5 BA B2 lt value2 gt B1B00 0 0 00 lt value3 gt All parameters to be edited must be sent in this format 12 MIDI bytes regardless of the number of bits required to transmit the value of the parameter When the QuadraVerb GT receives this message it will edit the specified parameter to the new value and display it If the fu
30. bjects 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 QuadraVerb GT Service Manual 4 General Troubleshooting While this manual assumes that the reader has fundamental understanding of electronics and basic troubleshooting techniques a review of some of the techniques used by our staff may help 1 2 10 11 12 Visual Inspection short visual inspection of the unit under test will often yield results without the need of complex signal analysis burnt or loose components are 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 fai
31. cp ER 25 TETTE 27 i VEE s 26 27 28 12 13 14 15 17 20 21 22 25 MASTER EFFECTS MASTER FX LEVEL ese teres rt eet rra orte ie cet tort ren A de vues 9 10 11 14 25 Dees x E 10 12 13 14 15 17 19 20 21 22 25 iom P R 10 17 18 19 22 23 25 OPCODES output level 2 OVERDRIVE adia ee A ae a E I a 24 25 QuadraVerb GT Service Manual 31 QuadraVerb GT Service Manual 32 NOTES QuadraVerb GT Service Manual 33
32. ger apply for such product even if your services or repairs were done in accordance with the Manual All service or repairs done by you or with reference to the Manual shall be solely your responsibility and Alesis shall have no liability for any such repairs or service work All such service or repairs are performed at the sole risk of the person performing the service or repairs You agree that all such work will be performed in a competent professional and safe manner at all times and to indemnify and fully hold Alesis and its successors and assigns harmless in the event of any failure to so perform Your purchase of the Manual shall be for your own ultimate use and shall not be for purposes of resale or other transfer As the owner of the copyright to the Manual Alesis does not give you the right to copy the Manual and you agree not to copy the Manual without the written authorization of Alesis Alesis has no obligation to provide to you any correction of or supplement to the Manual or any new or superseding version thereof Alesis shall have the right to refuse to sell or otherwise transfer repair parts or materials to you in its sole discretion You shall not use sell or otherwise transfer spare or replacement parts supplied by Alesis to you i to repair or be used in products manufactured for or by third parties or ii to any third parties for any purpose You shall not make any warranties or guarantees with respect to the product
33. lly stored as 0 for 99 99 for 0 and 198 for 99 REVERB FUNCTION 1 CONFIGURATION 0 EQ PCH DL REVERB page 0 type 0 PLATE 1 1 1 2 CHAMBER 1 3 HALL 1 4 REVERSE 1 1 0 3 INPUT 1 0 3 INPUT 1 0 3 INPUT 1 0 3 INPUT 1 0 3 INPUT 1 2 0 1 INPUT 2 0 1 INPUT 2 0 1 INPUT 2 0 1 INPUT 2 0 1 INPUT 2 3 0 198 IN MIX 0 198 IN MIX 0 198 IN MIX 0 198 MIX 0 198 IN MIX 4 1 140 PREDLY 1 140 PREDLY 1 140 PREDLY 1 140 PREDLY 1 140 PREDLY 5 1 198 PRE MIX 1 198 PRE MIX 1 198 PRE MIX 1 198 PRE MIX 1 198 PRE MIX 6 0 99 DECAY 0 99 DECAY 0 99 DECAY 0 99 DECAY 0 99 REV TIME 7 0 8 DIFFUSION 0 8 DIFFUSION 0 8 DIFFUSION 0 8 DIFFUSION 0 8 DIFFUSION 8 0 8 DENSITY 0 8 DENSITY 0 8 DENSITY 0 60 LOW DEC 0 8 DENSITY 9 0 60 LOW DEC 0 60 LOW DEC 0 60 LOW DEC 0 60 HIGH DEC 0 60 LOW DEC 10 0 60 HIGH DEC 0 60 HIGH DEC 0 60 HIGH DEC 0 1 ON 0 60 HIGH DEC 11 0 1 GATE ON 0 1 GATE ON 0 1 GATE ON 0 99 GATE HLD 12 0 99 GATE HLD 0 99 GATE HLD 0 99 GATE HLD 0 99 GATE REL 13 0 99 GATE REL 0 99 GATE REL 0 99 GATE REL 0 99 GATE LEV 14 0 99 GATE LEV 0 99 GATE LEV 0 99 GATE LEV CONFIGURATION 1 LEZLIE DL REVERB 5 RING DL REVERB 6 RESONATOR DL REV page 0 type 0 PLATE 1 1 0 2 INPUT 1 2 14 same as configuration 0 1 ROOM 1 0 2 INPUT 1 2 CHAMBER 1 0 2 INPUT 1 3 HALL 1 0 2 INPUT 1 CONFIGURATION 2 GRAPH
34. lures 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 QuadraVerb GT Service Manual 5 Table of Contents PREFACE Je READ THIS use WARNING needed SAFETT SUGGESTIONS iii ii agenda IV General GING ha oett tee id x a S dore e V ges iii iai i a i i a i i i p a i S sa 7 2 0 Soffware E 9 0 GEMIDD
35. nction and page selected does not exist in the current configuration the command will be ignored If the value received is out of range for the parameter selected the range will be limited to a legal value The function and page numbers for each parameter are shown in the next section 02 MIDI Data Dump FO 00 00 OE 07 02 lt program gt lt data gt F7 lt program gt 0 99 selects individual programs 100 selects the edit buffer gt 100 selects all 100 programs lt data gt is in a packed format in order to optimize data transfer Eight MIDI bytes are used to transmit each block of 7 QuadraVerb GT 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 QuadraVerb GT Service Manual 10 SEVEN QUADRAVERB GT BYTES A7 A6 A5 4 A2 A1 B7 B6 B5 B4 B3 B2 B1 BO C7 C6 C5 C4 C3 2 C1 CO D7 D6 05 D4 D3 D2 D1 DO E7 E6 E5 E4 E2 E1 EO F7 F6 F5 FA F3 F2 F1 FO G7 G6 G5 G4 G3 G2 C1 GO O TRANSMITTED AS 0 A7 A6 A5 4 2 1 0 B7 B6 B5 B4 B3 B2 0 B1 BO C7 C6 C5 C4 C3 0 C2 C1 D7 D6 D5 D4 0 D3 D2 D1 DO E7 E6 E5 0 E4 E2 E1 EO F7 F6 0 F5 FA F2 F1 FO G7 0 G6 Gd G4 G3 G2 G1 GO NOOR Q N There are 147 bytes sent for a single data dump which corresponds to 128 bytes of program data There are 14 629 bytes sen
36. s of Alesis or the use thereof on behalf of Alesis or in your own name The foregoing describes the entire understanding related to sale or transfer of the Manual to you and no other terms shall apply unless in a writing signed by an authorized representative of Alesis QuadraVerb GT Service Manual 2 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 Tadiran Type TL 5101 Rating 3 6V REPAIR BY ANY PERSON OR ENTITY OTHER THAN AN AUTHORIZED ALESIS SERVICE CENTER WILL VOID THE ALESIS WARRANTY PROVISION 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
37. t for a 100 program dump which corresponds to 12 800 bytes of program data The location of each parameter within a program is shown in the next section When the QuadraVerb G T receives a data dump message the display reads LOADING MIDI DATA Should the s MIDI input buffer overflow the display will read BUFFER OVERFLOW This message will remain on the display until any button is pressed 03 MIDI Dump Request FO 00 00 07 03 lt program gt F7 lt program gt 0 99 selects individual programs 100 selects the edit buffer gt 100 selects all 100 programs When this message is received MIDI data dump will be initiated and the display will MIDI DATA DUMP IN PROGRESS Upon completion of the dump the display will return to its previously displayed page read QuadraVerb GT Service Manual 11 INDIVIDUAL PARAMETER LOCATION FUNCTION AND PAGE VALUES The following lists give the parameter locations and ranges for each of the effects in each of the configurations The parameter associated with particular function and page may be dependent on both the current configuration and the current mode of the effect e g chorus phase etc In conditions where page relates to different parameters depending on the mode of the effect the parameters are listed in tables under each mode All parameters are offset binary values This means that signed parameter with range of 99 to 99 in the display is actua
38. t is not used for any significant period of time the product s AC power supply cord should be unplugged from the AC outlet 5 Foreign Objects and Liquids Take care not to allow liquids to spill or objects to fall into any openings of the product 6 Water or Moisture The product should not be used near any water or in moisture 7 Heat Do not place the product near heat sources such as stoves heat registers radiators or other heat producing equipment 8 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 9 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 10 Cleaning The product should only be cleaned as the manufacturer recommends 11 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 12 Damage to the Product Qualified service personnel should service the unit in certain situations including without limitation when Liquid has spilled or o

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