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Alto ACL2 Service Manual

Compressor/limiter/gate
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Service Manual
Model: ACL2
Compressor/Limiter/Gate
www.altoproaudio.com
Version: 1.1

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Summary of Contents for Alto ACL2

  • Page 1 Service Manual Model: ACL2 Compressor/Limiter/Gate www.altoproaudio.com Version: 1.1...
  • Page 2 CONTENTS 1. Specification 2. Block Diagram 3. Schematic Diagram 4. Printed Circuit Board 5. Wiring Diagram 6. Test Procedure 7. Electrical Parts List 8. Exploded Views & Mechanical Parts List 9. Troubleshooting 10. Notes...
  • Page 3 SPECIFICATIONS FOR ACL2 AUDIO INPUT Connectors XLR and 1/4” TRS (Pin 2 and Tip hot) Type Electronically balanced/unbalanced Impedance Balanced >50Kohm, Unbalanced>25Kohm Max input level >+24dBu balanced and unbalanced CMRR Typically>50dB at 1KHz AUDIO OUTPUT Connectors XLR and 1/4” TRS (Pin 2 and Tip hot)

  • Page 4: Power Supply

    POWER SUPPLY USA/Canada ~120VAC, 60Hz U.K./Australia ~240VAC, 50Hz Mains Voltages Europe ~230VAC, 50Hz ~100-120VAC, General Export Model ~200-240VAC, 50-60Hz 100-120VAC :200mA (SLOW-BLOW) Fuse 200-240VAC : 100mA (SLOW-BLOW) Power consumption 10Watts Mains Connection Standard IEC receptacle PHYSICAL Dimension W(483.0)*D(198.0)*H(44.2) mm Net Weight...
  • Page 8 PCB : ACL2-FP Bottom Layer PCB : Bottom Solder Mask ACL2-FP PCB : ACL2-FP TOP Layer PCB : Top overlay ACL2-FP...
  • Page 9 PCB : TOP Solder Mask ACL2-FP ACL2-FP Drill Drawing PCB : T Tool Hole Size Hole Count Plated Tool Travel --------------------------------------------------------------------------- 20mil (0.508mm) 57.40 Inch (1457.88 mm) 21mil (0.5334mm) 17.98 Inch (456.78 mm) 31mil (0.7874mm) 40.19 Inch (1020.90 mm) 39mil (0.9906mm) 50.57 Inch (1284.45 mm)
  • Page 10 PCB : ACL2-BP Bottom Layer PCB : Bottom Solder Mask ACL2-BP PCB : ACL2-BP TOP Layer PCB : Top overlay ACL2-BP...
  • Page 11 PCB : TOP Solder Mask ACL2-BP ACL2-BP Drill Drawing PCB : T Tool Hole Size Hole Count Plated Tool Travel --------------------------------------------------------------------------- 20mil (0.508mm) 9.41 Inch (239.04 mm) 28mil (0.7112mm) 13.28 Inch (337.38 mm) 31mil (0.7874mm) 25.45 Inch (646.37 mm) 39mil (0.9906mm) 25.58 Inch (649.85 mm)
  • Page 12 ACL2PWRSW P T2 P T1...
  • Page 13 Date 2004/12/14 Prepared by 030037[蘇文祥] Page No.: Item No. PF01980 Version UNIT: DESCRIPTION: ACL2 Date: 2004/11/06 ACL2 ALTO 230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate ├0001--------------------------------- MA00084 1.0000...
  • Page 14 Date 2004/12/14 Prepared by 030037[蘇文祥] Page No.: Item No. PF01980 Version UNIT: DESCRIPTION: ACL2 Date: 2004/11/06 ACL2 ALTO 230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate ├0008--------------------------------- NI03257 4.0000...
  • Page 15 Date 2004/12/14 Prepared by 030037[蘇文祥] Page No.: Item No. PF01980 Version UNIT: DESCRIPTION: ACL2 Date: 2004/11/06 ACL2 ALTO 230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate ├0030--------------------------------- MG00036 3.0000...
  • Page 16 Date 2004/12/14 Prepared by 030037[蘇文祥] Page No.: Item No. PF01980 Version UNIT: DESCRIPTION: ACL2 Date: 2004/11/06 ACL2 ALTO 230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate │└0002------------------------------- NI00014 1.0000...
  • Page 17 Date 2004/12/14 Prepared by 030037[蘇文祥] Page No.: Item No. PF01980 Version UNIT: DESCRIPTION: ACL2 Date: 2004/11/06 ACL2 ALTO 230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate ││...
  • Page 18 Date 2004/12/14 Prepared by 030037[蘇文祥] Page No.: Item No. PF01980 Version UNIT: DESCRIPTION: ACL2 Date: 2004/11/06 ACL2 ALTO 230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate │ ├0010------------------------------ CB00235 2.0000...
  • Page 19 Date 2004/12/14 Prepared by 030037[蘇文祥] Page No.: Item No. PF01980 Version UNIT: DESCRIPTION: ACL2 Date: 2004/11/06 ACL2 ALTO 230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate │ ├0009----------------------------- RD00085 4.0000...
  • Page 20 Date 2004/12/14 Prepared by 030037[蘇文祥] Page No.: Item No. PF01980 Version UNIT: DESCRIPTION: ACL2 Date: 2004/11/06 ACL2 ALTO 230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate │ │...
  • Page 21 Date 2004/12/14 Prepared by 030037[蘇文祥] Page No.: Item No. PF01980 Version UNIT: DESCRIPTION: ACL2 Date: 2004/11/06 ACL2 ALTO 230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate │ │...
  • Page 22 Date 2004/12/14 Prepared by 030037[蘇文祥] Page No.: Item No. PF01980 Version UNIT: DESCRIPTION: ACL2 Date: 2004/11/06 ACL2 ALTO 230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate ├0052--------------------------------- HK04588 1.0000...
  • Page 23 Date 2004/12/14 Prepared by 030037[蘇文祥] Page No.: Item No. PF01980 Version UNIT: DESCRIPTION: ACL2 Date: 2004/11/06 ACL2 ALTO 230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate │ ├0001------------------------------ HB01391 1.0000...
  • Page 24 Date 2004/12/14 Prepared by 030037[蘇文祥] Page No.: Item No. PF01980 Version UNIT: DESCRIPTION: ACL2 Date: 2004/11/06 ACL2 ALTO 230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate │├0001------------------------------- HB00012 1.0000...
  • Page 25 Date 2004/12/14 Prepared by 030037[蘇文祥] Page No.: Item No. PF01980 Version UNIT: DESCRIPTION: ACL2 Date: 2004/11/06 ACL2 ALTO 230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate │└0015------------------------------- MG00160 2.0000...