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Service Manual
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Copyright © 2002 Alesis Distribution, LLC.
ALESIS
HD24 (RL)
P/N: 8-31-0092-B
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Summary of Contents for Alesis HD24
- Page 1 This will allow for document distribution history. The information in this document contains privileged and confidential information. It is intended only for the use of those authorized by Alesis. If you are not the authorized, intended recipient, you are hereby notified that any review, dissemination, distribution or duplication of this document is strictly prohibited.
- Page 2 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.
- Page 3 OS code via MIDI. In the case where the software on the flash is valid yet not compatible with the hardware, this will force the HD24 to load new software using the MIDI. Track 9 + Track 20 Reconfigure Hardware This will force the PLD firmware to be reloaded.
- Page 4 HD24 MAIN PCB Rev D...
- Page 16 HD24 MAIN PCB Rev F...
- Page 28 HD24 A/D PCB Rev A...
- Page 36 HD24 D/A PCB Rev A...
- Page 44 HD24 Alpha PCB Rev A...
- Page 50 HD24 Meter PCB Rev A...
- Page 55 HD24 HD I/F PCB Rev A...
- Page 62 HD24 HD I/F PCB Rev B...
- Page 70 HD24 ECN History...
- Page 73 Sync In Wordclock Modification for RL Main PCB Rev. C (August 29, 2001) Fig. 1: Circuit Modification Diagram Steps: Cut U2 pin 7 (red circle) as close to PCB as possible. Bend pin approximately straight out. Lift U4 pins 9 & 11 (red rectangles) from the PCB. Be careful to lift pins straight to keep from breaking them off.
- Page 75 System Wordclock Modification for RL Main PCB Rev. C (September 19, 2001) Fig. 1: Circuit Modification Diagram Steps: Cut Trace from R26 to T3 as close to R26 as possible (at red arrow). Connect 47 Ohm 1/8 Watt resistor between T3 and the lower right pad of R26 (blue line w/ resistor symbol).
- Page 77 Alesis RL (HD24) HD Backplane ECN 9-79-0238 11/05/2001 Section 1 – PCB Modification 1. Apply the Foam Strip (9-34-0026) to the Capacitor (1-08-0228) 2. Form the leads of the Capacitor (1-08-0228) as shown in the diagrams below. 3. Solder the Capacitor (1-08-0228) to the HD Backplane PCB (9-79-...
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Page 78: Top View
TOP VIEW SIDE VIEW... - Page 80 HD24...
- Page 81 RECORDER MULTI-TRACK ADAT-HD24 RL - UL RL-UL 7-41-0005 CABLE POWER UL/CSA SJT RL-UL 7-51-1219-B SHEET "WELCOME TO ALESIS FAMILY" 5 x 8" RL-UL RECORDER MULTI-TRACK ADAT-HD24 RL 4-18-0023-A CABLE DIL RIBBON 26-PIN F/F (MAIN-A/D) RL MAIN-A/D 4-18-0024-A CABLE DIL RIBBON 34-PIN F/F (MAIN-ALPHA) RL...
- Page 82 Alesis ADAT HD-24 (RL) 05-16-02 GEL SILICA 5G PACKET 7-91-1002 7-93-4513 WRAP FOAM SHEET 45" x 13.5" 7-94-2029 POLYBAG 20" x 29" - 4 MIL 9-01-0044-A EXTRUSION FRONT-PANEL RL - REV A 9-02-0008-A RACK-EAR EXTRUSION RL - REV A 9-03-0112-B CHASSIS RL - REV B...
- Page 83 Alesis ADAT HD-24 (RL) 05-16-02 CAP 560pF NPO 0805 C17 C44 9-79-0231 1-55-0561 C1-16 C18-19 C21-28 C30 C33-43 C46-49 C52-60 C62 C64 C67-77 9-79-0231 1-56-0103 CAP 0.01uF X7R 0805 C79 C81 C85-112 C115-124 9-79-0231 1-56-0220 CAP 22pF NPO 0805 5% 50V...
- Page 84 Alesis ADAT HD-24 (RL) 05-16-02 JACK DIN 5-PIN MIDI PCB MOUNT 180ø W/SHIELD J7-8 9-79-0231 4-00-0002 9-79-0231 4-02-0006 JACK 1/4" MONO 5-PIN FEM MINI W/GRND LUG STRAIGHT J6 J9 9-79-0231 4-04-0003 CON BNC (WAKA) 9-79-0231 4-10-0010 CON DB-9 9-PIN FEMALE 90ø METAL-FACE W/STANDOFFS CON DB-9 9-PIN FEMALE 90ø...
- Page 85 Alesis ADAT HD-24 (RL) 05-16-02 R10-11 R14-15 R28-29 R32-33 R46-47 R50-51 R64-65 R68-69 R77 R79 R90 R93-94 R97 R108 R111-112 R115 R126 R129-130 R133 R142 R144 R152 R154 R165 R168-169 R172 R183 R186-187 R190 9-79-0232 0-16-3241 RES 3.24K OHM 1/10W 1% 0805...
- Page 86 Alesis ADAT HD-24 (RL) 05-16-02 R1 R7 R18 R20-21 R24 R35 R40-41 R47 R58 R60-61 R64 R75 R80-81 R87 R98 R100-101 R104 R115 R120-121 R127 R138 R140-141 R144 R155 R160 R162 R168 R179 R181-182 R185 R196 R201-202 R206 9-79-0233 0-16-8251 RES 8.25K OHM 1/10W 1% 0805...
- Page 87 Alesis ADAT HD-24 (RL) 05-16-02 THERMISTOR 10 OHM 2A NTC 9-79-BD01 0-22-0100 9-79-BD01 1-02-0103 CAP 0.01uF CERDISC Y5P 10% 50V 5.12x9x3mm C15 C19 9-79-BD01 1-02-0104 CAP 0.1uF CERDISC 10% .30"DIA. C8 C11 9-79-BD01 1-02-5103 CAP 0.01uF CERDISC 20% 500V 5x5x2mm 9-79-BD01 1-02-9470 CAP 47pF CERDISC 20% 1kV 6.4x7.5x3mm...
- Page 88 Alesis ADAT HD-24 (RL) 05-16-02 9-79-BD01 7-07-0044 INSULATOR TUBING FRS 18AWG x 7/8" STANDARD WALL INSTALL WITH R5 9-79-BD01 7-13-0033-A HEATSINK TIN-PLATED 1x0.5x1.18" TO-220 - REV A INSTALL WITH U1 9-79-BD01 7-30-0012 CHOKE ROD OUTPUT 10uH 6A 1"-HIGH L2-5 9-79-BD01 7-30-0022 CHOKE COMMON MODE 22mH 0.50A...
- Page 89 Alesis ADAT HD-24 (RL) 05-16-02 RES 15 OHM 1/2W 5% R3-4 R6-7 9-79-0235 0-05-0150 9-79-0235 0-05-0752 RES 7.5K OHM 1/2W 5% R1-2 R5 9-79-0235 0-16-1002 RES 10.0K OHM 1/10W 1% 0805 9-79-0235 0-16-5112 RES 51.1k OHM 1/10W 1% 0805 RES CHIP ARRAY 4 X 10K OHM 1/16W 5% ISOLATED c- 9-79-0235 0-17-0103 c=0.8mm...
- Page 90 Alesis ADAT HD-24 (RL) 05-16-02 RES CHIP ARRAY 4 X 10K OHM 1/16W 5% ISOLATED c- 9-79-0236 0-17-0103 c=0.8mm R1-2 9-79-0236 1-08-0476 CAP 47uF ELEC 25V 2.5x6.3x7mm C7 C9 9-79-0236 1-16-0222 CAP 22uF ELEC LOW-ESR 20% 63V 105øC 2.5X6.3X11mm 9-79-0236 1-56-0103 CAP 0.01uF X7R 0805...
- Page 91 Alesis ADAT HD-24 (RL) 05-16-02 HEADER SIL 2-PIN 2mm SHRD 9-79-0238 4-15-1002 9-79-0238 5-00-0021 SCREW 4-40 x 3/8" PPZ INSTALL WITH U4 9-79-0238 5-01-0029 WASHER FLAT #4 ZINC 0.25"OD INSTALL WITH U4 9-79-0238 5-02-4402 NUT HEX 4-40 INSTALL WITH U4...
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