Alesis MATICA 500 Service Manual
  1. Manuals
  2. Brands
  3. Alesis Manuals
  4. Amplifier
  5. Matica 500
  6. Service manual

Alesis MATICA 500 Service Manual

Hide thumbs Also See for MATICA 500:
Table of Contents

Advertisement

Quick Links

ALESIS
MATICA 500/900
(A4/A8)
Service Manual
P/N: 8-31-0030-A

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the MATICA 500 and is the answer not in the manual?

Questions and answers

Related Manuals for Alesis MATICA 500

Summary of Contents for Alesis MATICA 500

  • Page 1 ALESIS MATICA 500/900 (A4/A8) Service Manual P/N: 8-31-0030-A...

  • Page 2: Table Of Contents

    2.20 New Case Bracket Insulator(s) ............7 2.30 Transformer Insulators..............8 3.00 Troubleshooting..................9 4.00 A4 Service Parts List ................. 10 4.10 A8 Service Parts List ..............13 5.00 Service Manual History ................16 INDEX ....................... 17 Alesis A4/A8 Service Manual------ 03/07/03...

  • Page 3: Theory Of Operation

    R2 and R3, R4. These are provided so an outboard impedance may be connected to modify the gain and overload characteristics as well as its frequency response. Following the amplifier is a passive low pass (R7, C1) filter that begins to limit the high frequency gain of the amplifier. Alesis A4/A8 Amplifiers Service Manual------ 03/07/03...

  • Page 4: Pre-Amp Section

    This is due to the loss of loop gain when the transconductance stage is required to deliver large amounts of current to the output stage drivers. CR1 and CR2 are connected as clamps to the discrete Alesis A4/A8 Amplifiers Service Manual------ 03/07/03...

  • Page 5: Output Device Protection

    V be with temperature can be realized. This tracks the needs of the output stage better. The 5k pot in the bias circuit adjusts the potential of the regulator. A 1.5k resistor (R55) sets the current Alesis A4/A8 Amplifiers Service Manual------ 03/07/03...

  • Page 6: Speaker Protection

    If the heat sink gets hotter than 55 deg.C. then an additional 20 resistor is switched in to deliver more current to the fan. The fan Alesis A4/A8 Amplifiers Service Manual------ 03/07/03...

  • Page 7: Thermal Management System

    Do not use just a hex nut, as it will probably not be able to hold the clamp pressure any more then the heat sink did. See diagram on next page. Alesis A4/A8 Amplifiers Service Manual------ 03/07/03...
  • Page 8 Alesis A4/A8 Amplifiers Service Manual------ 03/07/03...

  • Page 9: New Case Bracket Insulator(S)

    Figures 3 and 4 show the new and old styles of insulator (New style Alesis Part # 5-04-1018). Replace the old insulators and reassemble the brackets and rectifier. Route the wires around the transformer bracket(s) as shown in Figure 5.

  • Page 10: Transformer Insulators

    The part numbers for the foam insulators are 9-23-1067 for the A8, and 9-23-1068 for the A4. Figure 6-Location For Foam Pads On Casetop Inside All trademarks are property of their respective companies. Alesis A4/A8 Amplifiers Service Manual------ 03/07/03...

  • Page 11: Troubleshooting

    J1 or J14 loose. Reseat cable and apply hot glue to prevent re loosening. One channel out. Poor solder connections at Troubleshoot and repair as the Neutrik connector or the necessary. high pass capacitors (see section 1.20). Alesis A4/A8 Amplifiers Service Manual------ 03/07/03...
  • Page 16 ALESIS MATICA 500/900 (A4/A8) Confidential Alesis Service Manual 8-31-0030-A...
  • Page 17 R95, 98, 103, 106 0-99-0511 RES 51.1 OHM 1/4W 1% MF MAIN R 7, 18, 36, 49, 62, 75 Group Part.Number Description Ref.Designator Comment 0-99-0511 RES 51.1 OHM 1/4W 1% MF OUTPUT M R101, R102 Alesis A4/A8 Amplifiers Service Manual------ 03/07/03...

  • Page 18: Service Manual History

    LED GREEN (LED TECH LT5221) CONTROL DS 2 7-51-1107 MANUAL REFERENCE A4/A8 LITERATURE PACK Group Part.Number Description Ref.Designator Comment 7-53-0001 STICKER BUMPER 7-03-0006 BRIDGE CM3502 35AMP/200V 7-06-0004 RELAY SPST 901CS-DC12 K1,2 Relay MUST be 'C'-config Alesis A4/A8 Amplifiers Service Manual------ 03/07/03...

  • Page 19: Index

    MAIN GNDCT Group Part.Number Description Ref.Designator Comment 2-99-0031 IC TIP31A NPN (FF) Q 39 2-99-5532 IC NE5532AN DUAL OPAMP (FF) MAIN U 1-3 2-99-7815 REG MCT7815CT +15V TO220 (MOT) 9-23-1068 FOAM PAD TRANSFORMER A4 Alesis A4/A8 Amplifiers Service Manual------ 03/07/03...

  • Page 20: A8 Service Parts List

    MAIN R7, R20, R33, R45, R78, R88 0-99-0511 RES 51.1 OHM 1/4W 1% MF OUTPUT M R116, R117 0-99-0593 RES 59K 1/4W 1% MF MAIN R39, R41, R83, R85 Group Part.Number Description Ref.Designator Comments Alesis A4/A8 Amplifiers Service Manual------ 03/07/03...
  • Page 21 BREAKER THERMAL CUTOUT 55 DEG. C.O.R. OUTPUT M 7-06-0012 CIRCUIT BREAKER 28-XQ1A-20 7-10-0029 FAN,DC ST12N6X Group Part.Number Description Ref.Designator Comments 7-20-0015 INDUCTOR,AIR CORE 1uH MAIN L1, L2 5-04-0000 INSULATOR, RECTIFIER 1.250X1.250 .200 HOLE Bridge rectifier Alesis A4/A8 Amplifiers Service Manual------ 03/07/03...
  • Page 22 MAIN Q7, Q28 2-07-4793 TRANS 2SC4793 MAIN Q11, Q32 2-99-0031 IC TIP31A NPN (FF) Q306 2-99-5532 IC NE5532AN DUAL OPAMP (FF) MAIN U1-3 2-99-7815 REG MCT7815CT +15V TO220 (MOT) 9-23-1067 FOAM PAD TRANSFORMER A4 Alesis A4/A8 Amplifiers Service Manual------ 03/07/03...

This manual is also suitable for:

Matica 900A4A8

Table of Contents