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Alesis PROLINEAR 720 DSP Service Manual
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Alesis PROLINEAR 720 DSP Service Manual

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ALESIS
Prolinear 720/820
DSP (AS1/AS3)
Service Manual
P/N: 8-31-0131-A
ATTENTION!
THIS DOCUMENT CONTAINS SENSITIVE
PROPRIETARY INFORMATION. ALL
RECIPIENTS MUST HAVE A CURRENT NON-
DISCLOSURE AGREEMENT ON FILE WITH
ALESIS, LLC.
DO NOT DISTRIBUTE THIS DOCUMENT IN
ELECTRONIC FORM
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. If
you are not authorized, please contact Alesis and destroy all copies of this
document. You may contact Alesis at support@Alesis.com.
Copyright © 2003 Alesis, LLC
Confidential
Alesis Service Manual
8-31-0131-A

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Summary of Contents for Alesis PROLINEAR 720 DSP

  • Page 1 ELECTRONIC FORM 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. If you are not authorized, please contact Alesis and destroy all copies of this document.
  • 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 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.
  • Page 4 The product is exposed to water or excessive moisture, c. The AC power supply plug or cord is damaged, d. The product shows an inappropriate change in performance or does not operate normally, or e. The enclosure of the product has been damaged. Confidential Alesis Service Manual 8-31-0131-A...

  • Page 5: Specification

    SERVICE MANUAL MODEL:PROLINEAR 720 DSP SPECIFICATION OPERATIONS Inputs Nominal input level: +4dBu (-15dBFS) The ProLinear DSP front panel contains a Liquid Crystal Display Maximum input level: +20dBu (7.0 Vrms) (LCD) and six buttons that serve different functions within each Input impedance: 10kΩ...
  • Page 6 SERVICE MANUAL MODEL:PROLINEAR 820 DSP SPECIFICATION OPERATIONS Inputs Nominal input level: +4dBu (-15dBFS) The ProLinear DSP front panel contains a Liquid Crystal Display Maximum input level: +20dBu (7.0 Vrms) (LCD) and six buttons that serve different functions within each Input impedance: 10kΩ...

  • Page 7: Disassembly Procedures

    DISASSEMBLY PROCEDURES 1.REMOVAL OF REAR PANEL (Fig.1) (A) TAKE OUT THE 10 PCS SCREWS FROM THE REAR PANEL TAKE OUT THE 3 PCS CONNECTOR DROM THE MAIN PCB Fig.1 2.REMOVAL OF WAVEGUIDE/DSP MODULE/20 PIN CABLE (Fig 2) (A) TAKE OUT THE 4 PCS SCREWS FROM THE DSP MODULE AND TAKE OUT THE DSP MODULE FROM THE WAVEGUIDE TAKE OUT THE 3 PCS SCREWS FROM THE WAVEGUIDE TAKE OUT THE 2 PCS SCREWS FROM THE 20PIN CABLE TO TAKE OUT THE 20 PIN CABLE...
  • Page 8 A. TAKE OUT THE 4 PCS SCREWS TO TAKE OUT THE TRIM RING AND THE WOOFER FROM THE FRONT BAFFLE (AS1)Fig.3-1 TAKE OUT THE 6 PCS SCREWS TO TAKE OUT THE TRIM RING AND THE WOOFER FROM THE FRONT BAFFLE (AS3)Fig.3-2 Fig.3-1 Prolinear 720 DSP Fig.3-2 Prolinear 820 DSP 4.REMOVAL OF DSP PCB (Fig.4) TAKE OUT THE 4 PCS SCREWS TO TAKE OUT DSP PCB AND RUBBER KEYPAD FROM THE DSP BEZEL Fig.4...
  • Page 9 DISASSEMBLY PROCEDURES 5.REMOVAL OF TWEETER (Fig.5) (A) TAKE OUT THE 4 PCS SCREWS AND BRASS NUTS TO TAKE OUT THE TWEETER FROM THE WAVEGUIDE Fig.5 6.REMOVAL OF I/O CUP (Fig.6) (A) TAKE OUT THE 4 PCS NUTS TO TAKE OUT THE SEALING CUP FROM THE REAR PANEL TAKE OUT THE 1 PCS UNT AND GROUNDING CABLE FROM THE REAR PANEL TAKE OUT THE GROUNDING CABLE FROM THE AC SWITHC (D) TAKE OUT 1 PIN CABLE FROM AC SWITCH AND AC SOCKET...
  • Page 10 DISASSEMBLY PROCEDURES 7.REMOVAL OF I/O PCB ASS'Y (Fig.7) (A) TAKE OUT 4 PCS SCREWS TO TAKE OUT THE I/O PCB ASS'Y FROM THE REAR PANEL TAKE OUT THE AC SWITCH TAKE OUT THE AC SOCKET Fig.7 8.REMOVAL OF POWER SUPPLY (Fig.8) (A) TAKE OUT THE 4 PIN CABLE FROM THE POWER SUPPLY\ TAKE OUT 4 PCS SCREWS TO TAKE OUT THE POWER SUPPLY FROM THE REAR PANEL...
  • Page 11 DISASSEMBLY PROCEDURES 9.REMOVAL OF MAIN PCB ASS'Y (Fig.9) (A) TAKE OUT 6 PCS SCREWS TO TAKE OUT THE MAIN PCB FROM THE REAR PANEL Fig.9...
  • Page 14 AS1 EXPLODED VIEW PARTS LIST...
  • Page 15 AS3 EXPLODED VIEW PARTS LIST...
  • Page 16 ALESIS Prolinear 720/820 DSP (AS1/AS3) SCHEMATIC FILES Confidential Alesis Service Manual 8-31-0131-A...
  • Page 17 Main PCB Confidential Alesis Service Manual 8-31-0131-A...
  • Page 20 Top Assembly Drawing...
  • Page 21 Bottom Trace...
  • Page 22 Bottom Assembly Drawing...
  • Page 23 I/O PCB Confidential Alesis Service Manual 8-31-0131-A...
  • Page 25 Top Assembly Drawing...
  • Page 26 Bottom Trace...
  • Page 27 Bottom Assembly Drawing...
  • Page 28 DSP Module PCB Confidential Alesis Service Manual 8-31-0131-A...
  • Page 38 ALESIS Prolinear 720/820 DSP (AS1/AS3) HISTORY Confidential Alesis Service Manual 8-31-0131-A...
  • Page 42 AS1 Phase Reversal Modification Components required for modification: 4.99K Ohm 1/8W 1% Thru-hole resistor (0-01-4991) Procedures: 1) Remove SMD resistors R1, R2, R29, and R30 (please refer to Figure 1). Fig.1...
  • Page 43 Please refer to Figures 2a and 2b for the following steps: 2) Solder one leg of a 4.99K 1/8W resistor to the left pad of R1. 3) Solder the other leg of this resistor to the right pad of R2. Fig.2a Fig.2b...
  • Page 44 Please refer to Figures 3a and 3b for the following steps: 4) Solder one leg of another 4.99K 1/8W resistor to the left pad of R2. 5) Solder the other leg of this resistor to the right pad of R1. Fig.3a Fig.3b...
  • Page 45 6) Repeat steps 2-5 on the component pads for R29 and R30. Refer to Figures 4a and 4b for the completed modification. Fig.4a Fig.4b...
  • Page 46 ProLinear720DSP POSITIVE PHASE MICRO EEPROM VER: 1.20 VER: 1.10 CS: 764E Alesis AS1 Version Sticker 7-53-0251-A 2003-07-18...
  • Page 50 AS1/AS3 POWER AMP MUTE NOISE FIX Additional parts required for modification: 1-02-0104 CAP 0.1uF CERDISC 10% 50V 1-56-0104 CAP 0.1uF X7R 0805 10% 50V Procedures: 1) Solder one 0805 0.1uF capacitor (1-56-0104) across the base and emitter pins of Q3 (see Figure 1 for details). Figure 1 2) Solder one thru-hole 0.1uF ceramic capacitor between jumpers J115 (mute pin of U3) and J117 (GND).
  • Page 51 Figure 2...
  • Page 52 ALESIS Prolinear 720/820 DSP (AS1/AS3) Confidential Alesis Service Manual 8-31-0131-A...
  • Page 53 AS1 BOM DESCRIPTION LEVEL 4-70-0023 CABLE LOW-FREQ TRANSDUCER 4-70-0024 CABLE HIGH-FREQ TRANSDUCER 4-71-0014 CABLE SYNC DB-9 5-METER M-F 4-74-0033 20P CONNECTOR 5-00-0410 SCREW 5-00-3512 SCREW 5-00-3519 SCREW 13 N3 5-00-3524 SCREW 5-00-4019 SCREW 5-02-0015 BRASS NUT 7-02-0031 TWEETER 7-02-0034 WOOFER 7-12-0046 EVA FELT 7-22-0015...
  • Page 54 AS1 BOM DESCRIPTION LEVEL 4-19-0407 4P CONNECTOR 4-70-0025 10P CONNECTOR 5-00-0007 SCREW 5-00-1011 SCREW 5-00-1308 SCREW 5-02-6328 5-04-0009 WASHER 6-02-0036 SWITCH 9-01-0070 EXTRUSION REAR-PANEL 9-15-0175-B KNOB 9-15-0346 I/O CUP 9-34-0047 CUP GASKET 9-79-0294 SW POWER BW653245SS WASHER NM1320802 EMULSION 9-79-0285 PCB ASS'Y CS104K10005X7R CAPACITOR 0.1UF/100V...
  • Page 55 AS1 BOM DESCRIPTION LEVEL 2-11-7915 IC LM7915 TO-220 2-21-3887 IC LM3886TF U2,3 2-50-4149 DIODE IN4148 SOT-23 D1,2 2-51-4401 TRANSISTOR 2N4401 Q1~3 2-51-4403 TRANSISTOR 2N4403 SOT-23 Q4,5 2-52-5242 DIODE MMBZ5242B 2-71-0532 IC NJM5532M 2-72-0339 IC LM339 4-14-0020 20P DIL CONNECTOR 4-15-0010 HEADER DIL 10P 0.1"...
  • Page 56 AS1 BOM DESCRIPTION LEVEL 0-15-0470 RESISTOR 47 Ω (SMD) 0-16-1001 RESISTOR 1K(SMD)1% R5,16,17,19~21 0-16-4751 RESISTOR 4.75K(SMD)1% 0-16-4752 RESISTOR 47.5K(SMD)1% R14,15,22 0-17-0270 RESISTOR 4X27 Ω 0-31-2200 RESISTOR 4X220 1/16W 1% R11~13 1-56-0101 CAPACITOR 100P SMD C17,21 1-56-0104 CAP 0.1UF X7R 10%50V 19 C1~8,10~16,19,24,28,30 1-56-0201 CAPACITOR 20P/50V SMD...
  • Page 57 AS3 BOM DESCRIPTION LEVEL 1 152-1276-0101 SOFT SHEET 1 370-03880001 POLY FOAM 1 380-26023010 PO BAG 1 4-70-0023 CABLE LOW-FREQ TRANSDUCER 1 4-70-0024 CABLE HIGH-FREQ TRANSDUCER 1 4-71-0014 CABLE SYNC DB-9 5-METER M-F 1 4-74-0033 20P CONNECTOR 1 5-00-0410 SCREW 1 5-00-3512 SCREW 1 5-00-3519...
  • Page 58 AS3 BOM DESCRIPTION LEVEL 2 4-70-0025 10P CONNECTOR 2 5-00-0007 SCREW 2 5-00-1011 SCREW 2 5-00-1308 SCREW 2 5-02-6328 2 5-04-0009 WASHER 2 6-02-0036 SWITCH 2 9-01-0070 EXTRUSION REAR-PANEL 2 9-15-0175-B KNOB 2 9-15-0346 I/O CUP 2 9-34-0047 CUP GASKET 2 9-79-0294 SW POWER 2 BW653245SS...
  • Page 59 AS3 BOM DESCRIPTION LEVEL 3 2-21-3887 IC LM3886TF U2,3 3 2-50-4149 DIODE IN4148 SOT-23 D1,2 3 2-51-4401 TRANSISTOR 2N4401 Q1~3 3 2-51-4403 TRANSISTOR 2N4403 SOT-23 Q4,5 3 2-52-5242 DIODE MMBZ5242B 3 2-71-0532 IC NJM5532M 3 2-72-0339 IC LM339 3 4-14-0020 20P DIL CONNECTOR 3 4-15-0010 HEADER DIL 10P 0.1"...
  • Page 60 AS3 BOM DESCRIPTION LEVEL 3 0-16-1001 RESISTOR 1K(SMD)1% R5,16,17,19,21 3 0-16-4751 RESISTOR 4.75K(SMD)1% 3 0-16-4752 RESISTOR 47.5K(SMD)1% R14,15,22 3 0-17-0270 RESISTOR 4X27 Ω 3 0-31-2200 RESISTOR 4X220 1/16W 1% R11~13 3 1-56-0101 CAPACITOR 100P SMD C17,21 3 1-56-0104 CAP 0.1UF X7R 10%50V 19 C1~8,10~16,19,24,28,30 3 1-56-0201 CAPACITOR 20P/50V SMD...

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