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LTO L-8 Service Manual

8-channel mixing console with digitel effects
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Service Manual
Model: L-8
(8-CHANNEL MIXING CONSOLE
WITH DIGITEL EFFECTS)
www.altoproaudio.com
Version: 1.1

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Summary of Contents for LTO L-8

  • Page 1 Service Manual Model: L-8 (8-CHANNEL MIXING CONSOLE WITH DIGITEL EFFECTS) www.altoproaudio.com Version: 1.1...

  • Page 2: Table Of Contents

    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. Notes...

  • Page 3: Specification

    8. TECHNICAL SPECIFICATION 1. SPECIFICATION (L-8) Mono input channels Microphone input electronically balanced, discrete input configuration Frequency response 10Hz to 55kHz, + Distortion (THD & N) 0.005% at + 4dBu, 1kHz Gain range 0dB to 60dB (MIC) SNR (Signal to Noise Ratio)
  • Page 4 Power supply Main voltage USA/Canada 100 120V~, 60Hz Europe 210 230V~, 50Hz U.K./Australia 240V~, 50Hz Power Consumption 25watts Fuse 100 120V~ : T500mAL 210 240V~ : T250mAL Main connection Standard IEC receptacle Physical Dimension (W D H) 245mm 268mm 24/73mm (9.64" 10.54" 0.94"/2.87") Net weight 2.4Kg (5.29lb) Shipping weight...

  • Page 5: Block Diagram

    2.Block Diagram...

  • Page 6: Schematic Diagram

    Titel -VCC INPUT STAGE C206 C290 C296 C298 C218 C220 C208 C202 PCB# L8MN1.PCB 100n 100n 100n 100n 100n 100n 100n 100n Size Model No: Revision ALTO L-8 VER030113 5-Oct-2003 Date: Sheet 1 of File: L8MN1.Sch Drawn By: KEVIN LIN.
  • Page 7 100n 100n 100n 100n 100n 100n Titel STEREO AUX & SENDS & MAIN OUT & 2TK & CTRL R & PHONES Size Model No: Revision A2(C) ALTO L-8 VER030120 5-Oct-2003 Date: Sheet 2 of File: L8MN1.S01 Drawn By: KEVIN LIN.
  • Page 9 U47C U43B 74HC14 10uF 4580M 4580M 4580M LM393 NE555 UDASP IN/OUT SECTION -VCC 100N 100N DGND PGND Titel UDASP IN/OUT SECTION Size Model No: Revision A2(C) ALTO L-8 VER030217 5-Oct-2003 Date: Sheet 4 of File: L8MN1.S03 Drawn By: KEVIN LIN.
  • Page 10 120R +VCC AUX-RTN2-R +VCC -VCC EFXRTN-R -VCC PH PWR CTRL-R-L R334 U29A U29B 120R Titel INPUT/OUTPUT STAGE BA15218N BA15218N PCB# L8PU2.PCB Size Model No: Revision A2(C) ALTO L-8 VER030120 Date: 5-Oct-2003 Sheet 1 of File: L8PU2.Sch Drawn By: KEVIN LIN.
  • Page 13 4. PRINTED CIRCUIT DIAGRAM PCB : L8MN1 Top Overlay...
  • Page 14 PCB : L8MN1 Top Layer...
  • Page 15 PCB : L8MN1 Bottom Layer...
  • Page 16 PCB : L8PU1 Top Overlay PCB : L8PU1 Bottom Layer...
  • Page 17 PCB : L8PU2 Top Overlay...
  • Page 18 PCB : L8PU2 Top Layer...
  • Page 19 PCB : L8PU2 Bottom Layer...
  • Page 20 PCB : RD82PWR Top Overlay PCB : RD82PWR Bottom Layer...
  • Page 21 PCB : 313123/2 Top Layer PCB : 313123/2 Bottom Layer...
  • Page 22 PCB : 313123/2 Top Overlay...

  • Page 27: Wiring Diagram

    5. Wiring Diagram...

  • Page 28: Electrical Parts List

    Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate ├0001--------------------------------- MA04065 1.0000 2003/04/29 ││ panel ││ L-8 ALTO 0.00 │└0001------------------------------- MA04066 1.0000 2003/04/24 │ │ panel │ │ 0.00 │ └0001------------------------------ MA04067 1.0000 2003/04/24 │ │...
  • Page 29 SEKAKU ELECTRON INDUSTRY CO.,LTD Multi-Level BOM Structure Listing 2003/10/05 Report No.: IEBO_P02 Date Prepared by JG970003[蔡忠憲] Page No.: Item No. PF01225 Version UNIT: DESCRIPTION: Date: 2003/04/29 L-8_ALTO_230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate...
  • Page 30 ALTO 0.00 ├0047--------------------------------- NE05004 4.0000 2003/04/29 │ label │ ALTO 0.00 ├0048--------------------------------- NI02620 1.0000 2003/04/29 │ insulation board │ 1*86.5*53 L-8 0.00 ├0049--------------------------------- NI02633 3.0000 2003/04/29 │ knob │ φ10.5*18 0.00 ├0050--------------------------------- NI00826 8.0000 2003/04/29 │ knob │ φ12*18 double color 0.00...
  • Page 31 Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate ├0052--------------------------------- NB02249 1.0000 2003/04/29 │ colour box │ L-8 ALTO 0.00 ├0053--------------------------------- NE11348 4.0000 2003/04/29 ││ label ││ L-8 ALTO 0.00 │├0001------------------------------- NH00012 1.0000 2003/05/31 ││...
  • Page 32 SEKAKU ELECTRON INDUSTRY CO.,LTD Multi-Level BOM Structure Listing 2003/10/05 Report No.: IEBO_P02 Date Prepared by JG970003[蔡忠憲] Page No.: Item No. PF01225 Version UNIT: DESCRIPTION: Date: 2003/04/29 L-8_ALTO_230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate...
  • Page 33 SEKAKU ELECTRON INDUSTRY CO.,LTD Multi-Level BOM Structure Listing 2003/10/05 Report No.: IEBO_P02 Date Prepared by JG970003[蔡忠憲] Page No.: Item No. PF01225 Version UNIT: DESCRIPTION: Date: 2003/04/29 L-8_ALTO_230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate...
  • Page 34 SEKAKU ELECTRON INDUSTRY CO.,LTD Multi-Level BOM Structure Listing 2003/10/05 Report No.: IEBO_P02 Date Prepared by JG970003[蔡忠憲] Page No.: Item No. PF01225 Version UNIT: DESCRIPTION: Date: 2003/04/29 L-8_ALTO_230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate...
  • Page 35 SEKAKU ELECTRON INDUSTRY CO.,LTD Multi-Level BOM Structure Listing 2003/10/05 Report No.: IEBO_P02 Date Prepared by JG970003[蔡忠憲] Page No.: Item No. PF01225 Version UNIT: DESCRIPTION: Date: 2003/04/29 L-8_ALTO_230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate...
  • Page 36 SEKAKU ELECTRON INDUSTRY CO.,LTD Multi-Level BOM Structure Listing 2003/10/05 Report No.: IEBO_P02 Date Prepared by JG970003[蔡忠憲] Page No.: Item No. PF01225 Version UNIT: DESCRIPTION: Date: 2003/04/29 L-8_ALTO_230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate...
  • Page 37 SEKAKU ELECTRON INDUSTRY CO.,LTD Multi-Level BOM Structure Listing 2003/10/05 Report No.: IEBO_P02 Date Prepared by JG970003[蔡忠憲] Page No.: Item No. PF01225 Version UNIT: DESCRIPTION: Date: 2003/04/29 L-8_ALTO_230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate...
  • Page 38 SEKAKU ELECTRON INDUSTRY CO.,LTD Multi-Level BOM Structure Listing 2003/10/05 Report No.: IEBO_P02 Date Prepared by JG970003[蔡忠憲] Page No.: Item No. PF01225 Version UNIT: DESCRIPTION: Date: 2003/04/29 L-8_ALTO_230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate...
  • Page 39 SEKAKU ELECTRON INDUSTRY CO.,LTD Multi-Level BOM Structure Listing 2003/10/05 Report No.: IEBO_P02 Date Prepared by JG970003[蔡忠憲] Page No.: Item No. PF01225 Version UNIT: DESCRIPTION: Date: 2003/04/29 L-8_ALTO_230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate...
  • Page 40 SEKAKU ELECTRON INDUSTRY CO.,LTD Multi-Level BOM Structure Listing 2003/10/05 Report No.: IEBO_P02 Date Prepared by JG970003[蔡忠憲] Page No.: Item No. PF01225 Version UNIT: DESCRIPTION: Date: 2003/04/29 L-8_ALTO_230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate...
  • Page 41 SEKAKU ELECTRON INDUSTRY CO.,LTD Multi-Level BOM Structure Listing 2003/10/05 Report No.: IEBO_P02 Date Prepared by JG970003[蔡忠憲] Page No.: Item No. PF01225 Version UNIT: DESCRIPTION: Date: 2003/04/29 L-8_ALTO_230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate...
  • Page 42 SEKAKU ELECTRON INDUSTRY CO.,LTD Multi-Level BOM Structure Listing 2003/10/05 Report No.: IEBO_P02 Date Prepared by JG970003[蔡忠憲] Page No.: Item No. PF01225 Version UNIT: DESCRIPTION: Date: 2003/04/29 L-8_ALTO_230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate...
  • Page 43 SEKAKU ELECTRON INDUSTRY CO.,LTD Multi-Level BOM Structure Listing 2003/10/05 Report No.: IEBO_P02 Date Prepared by JG970003[蔡忠憲] Page No.: Item No. PF01225 Version UNIT: DESCRIPTION: Date: 2003/04/29 L-8_ALTO_230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate...
  • Page 44 CB00070 1.0000 2003/03/12 │ electrolytic capacitor │ 1000uF/16V φ10*16mm 0.00 │ │ ├0062--------------------------------- HK03893 1.0000 2003/04/29 ││ PC board ││ P-313123-DIP(L-8) 0.00 │├0001------------------------------- SC00004 1.0000 2003/04/29 ││ quartz crystalloid ││ 16.00MHZ LP-3.5S(HC-49US) 0.00 ││ ││ │├0002------------------------------- HC00499 1.0000 2003/06/24 ││...
  • Page 45 │││ electrolytic capacitor │││ 100uF/16V φ6*5mm 0.00 │││ C19,C12,C5,C24,C21,C25,C26,C28,C2,C16 │││ ││└0003----------------------------- HK03894 1.0000 2003/06/18 ││ │ PC board ││ │ P-313123-SMD(L-8) 0.00 ││ ├0001---------------------------- HB00895 1.0000 2003/04/29 ││ │ pc board ││ │ 313123/2(1*6) 0.00 ││ ├0002---------------------------- CI00049 2.0000 2003/04/29 ││...
  • Page 46 SEKAKU ELECTRON INDUSTRY CO.,LTD Multi-Level BOM Structure Listing 2003/10/05 Report No.: IEBO_P02 Date Prepared by JG970003[蔡忠憲] Page No.: Item No. PF01225 Version UNIT: DESCRIPTION: Date: 2003/04/29 L-8_ALTO_230V Version Item No Loss % Ver. Unit Effective Date Cardinal Item Descri Usage Rate @:Phantom Layer Component Remark Attrition Rate...
  • Page 47 8. Exploded Views...
  • Page 48 Mechanical Parts List Model No. ALTO L-8 Item No Item Description MA04065 panel L-8 ALTO HK03838 K-PC board P-L8PU2-DIP MG00305 copper pole M3*24*0.5PH MG00061 screw M3*10 MG00041 screw M3*6 MF00061 washer JY-6351G-02-250 ME00060 socket nut JY-6351G-02-250 NI02084 knob φ10.5*18 NI01862 5.5*5.5*14.5...