Alesis Matica 500 Service Manual

Confidential Alesis Service Manual 8-31-0030-A ALESISMATICA 500/900 (A4/A8)Service Manual P/N: 8-31-0030-A The information in this document contains

Alesis A4/A8 Amplifiers Service Manual------ 4 03/07/03 through the bias sense transistor (Q18) making the current in the sense transistor relativel

Alesis A4/A8 Amplifiers Service Manual------ 5 03/07/03 speed will still be modulated by the drive to the amplifier. If the heat sink gets hot enoug

Alesis A4/A8 Amplifiers Service Manual------ 6 03/07/03

Alesis A4/A8 Amplifiers Service Manual------ 7 03/07/03 2.20 New Case Bracket Insulator(s) It was found that it was possible for the insulation on

Alesis A4/A8 Amplifiers Service Manual------ 8 03/07/03 2.30 Transformer Insulators These foam insulators were added for two purposes:x Electrical

Alesis A4/A8 Amplifiers Service Manual------ 9 03/07/03 3.00 Troubleshooting The following chart is intended to help point a technician in the righ

Confidential Alesis Service Manual 8-31-0030-A PrefaceThis document is intended to assist the service technician in the operation, maintenance and r

Confidential Alesis Service Manual 8-31-0030-A ALESISMATICA 500/900 (A4/A8)BOM

Alesis A4/A8 Amplifiers Service Manual------ 10 03/07/03 4.00 A4 Service Parts ListGroup Part.Number Description Qty PCB Ref.Designator Comment

Alesis A4/A8 Amplifiers Service Manual------ 11 03/07/03 CFR 0-99-0563 RES 5.6K 1/2W 5% CF 2 MAIN R 54, 80 CFR 0-99-0593 RES 59K 1/4W 1% MF

Alesis A4/A8 Amplifiers Service Manual------ 12 03/07/03 ME 7-06-0008 CIRCUIT BREAKER 28-XQ1A-12 1 ME 7-06-0010 BREAKER THERMAL CUTOUT 80 DEG.O

Alesis A4/A8 Amplifiers Service Manual------ 13 03/07/03 4.10 A8 Service Parts ListGroup Part.Number Description Qty PCB Ref.Designator Comments

Alesis A4/A8 Amplifiers Service Manual------ 14 03/07/03 CFR 0-99-0752 RES 7.5K OHM 1/2W 5% CF 2 MAIN R54, R96 CFR 0-99-1000 RES 1K OHM 1/4W

Alesis A4/A8 Amplifiers Service Manual------ 15 03/07/03 MIS 5-04-1018 INSULATOR XFMR BRACKET 4 MIS 7-70-0007 FISH PAPER 5.7 x 14.0 A8 1

Confidential Alesis Service Manual 8-31-0030-A WarningsTO REDUCE THE RISK OF ELECTRIC SHOCK OR FIRE, DO NOT EXPOSE THIS PRODUCT TO WATER OR MOISTURE

Confidential Alesis Service Manual 8-31-0030-A Safety Instructions Carefully read the applicable items of the operating instructions and these safet

Alesis A4/A8 Service Manual------ iv 03/07/03 General Troubleshooting While this manual assumes that the reader has a fundamental understanding

Alesis A4/A8 Service Manual------ v 03/07/03 Table of ContentsPREFACE ...

Alesis A4/A8 Amplifiers Service Manual------ 1 03/07/03 1.00 Theory of Operation The A4/A8 amplifiers are basic stereo amplifiers. They have 0dBm i

Alesis A4/A8 Amplifiers Service Manual------ 2 03/07/03 1.20 Pre-Amp Section The pre-amp section also uses the Signetics 5532A op amp. The circuits

Alesis A4/A8 Amplifiers Service Manual------ 3 03/07/03 darlingtons (causing the transconductance stage not to saturate, which reduces the possibili