Alto MS8 Service Manual
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Alto MS8 Service Manual

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MODEL: MS8/MS8A
www.altoproaudio.com
Version 1.0
Revised on Apr,2010

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Summary of Contents for Alto MS8

  • Page 1 MODEL: MS8/MS8A www.altoproaudio.com Version 1.0 Revised on Apr,2010...

  • Page 2: Table Of Contents

    CONTENTS 1. Introduction........................1 2. Specification........................2 3. Block Diagram......................3 4. Schematic Diagram......................5 5. Wiring Diagram......................12 6. PCB Layout.........................14 7. Exploded View & Mechanical Parts List..............18 8. Trouble Shooting ......................23 9. BOM List........................24...

  • Page 3: Introduction

    MDF 15mm plywood as wooden cabinet, which enjoys features like thick bass. Metal handle and black powder painted cabinet represents its generosity and characteristics. The precise electric crossover contained makes the sound clean and clear, with (MS8 150W RMS / 300W peak (AES Standard) /MS8A 200W- LOW /50W-HIGH in EIAJ (AES Standard)), which can meet needs in any application fields.

  • Page 4: Specification

    2. Specification 8'' 2- Way Passive Speaker Cabinet Power System 150W RMS / 300W peak(AES Standard) Maximum SPL@1m 116dB continuous / 119dB peak Frequency Response 67Hz-18kHz (-10dB) Sensitivity(1w@1mt) 94.5 dB SPL Impedance 8Ohm (nominal) Coverage (H°xV°) 70°x70°Nominal Transducer Low 8'' Woofer, 1.5''voice coil, with double ventilation Transducer High 1'' Neodymium on Spherical Horn (Tractrix contour) Passive Crossover...

  • Page 5: Block Diagram

    3. Block Diagram --- 3 ---...
  • Page 6 --- 4 ---...

  • Page 7: Schematic Diagram

    4. Schematic Diagram --- 5 ---...
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  • Page 14: Wiring Diagram

    5. Wiring Diagram --- 12 ---...
  • Page 15 --- 13 ---...

  • Page 16: Pcb Layout

    6. PCB Layout MS8 speaker cabinet --- 14 ---...
  • Page 17 MS8 speaker cabinet --- 15 ---...
  • Page 18 MS8A active speaker cabinet --- 16 ---...
  • Page 19 MS8A active speaker cabinet --- 17 ---...

  • Page 20: Exploded View & Mechanical Parts List

    7. Exploded View & Mechanical Parts List --- 18 ---...
  • Page 21 --- 19 ---...
  • Page 22 MODEL NO:MS8A speaker module --- 20 ---...
  • Page 23 MS8 Mechanical Parts List S/N Part No Description Specification Remark NI04746 label-RS 49*30mm MS SERIES ALTO_V1.0 MG00437 black screw-RS M3*16 grille*14 MG00042 black screw-RS M3*10 plastic label*3 NI04731 ZC-label-RS MS SERIES ALTO_V1.0 MD01382 ZB-grille-RS MS 8_V1.0 MF00012 white washer-RS φ4*φ9*0.8t_V 1.2...
  • Page 24 19 ND00397 EV foam-RS φ204.5*φ186.5*2 2 tweeter & woofer 20 ND01107 EV foam-RS 1.0t*465*35mm 2 paste on wooden cabinet 21 NC02834 wooden speaker cabinet-RS MS8 22 ND00398 EV foam-RS SR500A-SUB 1205.5*15*2 1 paste on module 23 HK10458 K-front panel combination MS8A_230V_ ALTO...

  • Page 25: Trouble Shooting

    8. Trouble Shooting Symptom Likely Cause What to do Speaker not connected to active AC power Verify that speaker is connected and that the circuit is on No sound Power not switched on Switch on power and verify that power Led is on No sound, speaker is Speaker power cable is faulty or omproperly *Re-seat theh power cable at both ends;...

  • Page 26: Bom List

    ├0005 MG00403 screw M4*23 ├0006 machine*1, NE19274 label-RS MS8A_V1.0 ├0007 warranty*1,carton*2 NE04372 label ├0008 machine*1, NE11750 label-RS ALTO PC_V1.2 ├0009 warranty*1,carton*2 MG00042 screw M3*10 plastic label*3 ├0010 MF00012 washer φ4*φ9*0.8t_V 1.2 plastic label*3 ├0011 ME00015 color nut 3m/m plastic label*3 ├0012...
  • Page 27 Rank Part No Description Specification Insert location Remark RA01234 fixed resistor 1/4W 4.7KΩ R100 │　│　├0002 RA01258 fixed resistor 1/4W 10Ω │　│　├0003 RA00157 fixed resistor 1/4W 0Ω │　│　├0004 SA00105 zener diode 1W 12V 1N4742 ZD1,ZD2,ZD3,ZD4 │　│　├0005 SB00014 Photodiode-RS-ACT VTL5C4 │　│　├0006 SA00052 L.E.D φ3 round(green)long foot 26 │　│　├0007 SA00053 L.E.D...
  • Page 28 Rank Part No Description Specification Insert location Remark │　│　　　│　├0023 RD00020 SMD fixed resistor 1/8W 1.5KΩ ±5% 0805 │　│　　　│　├0024 RD00586 precise resistor-RS 2.49K±1% 0805 U1,U2,U3,U4,U5,U6,U7,U8,U9, │　│　　　│　├0025 SG00558 integrated circuit-RS UTC4580M(4580M )(SOP8)/(YW) │　│　　　│　├0026 NE19370 label-RS MS8A HK10604_V1.0 │　│　　　│　├0027 HB02150 PCB-RS MS15A(1*2)_VER090527 │　│　　　│　└0028 RD00236 SMD precise resistor 1/8W 5.90KΩ...
  • Page 29 Rank Part No Description Specification Insert location Remark RH00032 thermistor-RS-NTC 10K±5%(NTCLE100E3103JB0) R119 │　│　├0045 RH00033 thermistor-RS-CT 5Ω B57235S-0509M000/(EPCOS) R147 │　│　├0046 RH00037 thermistor-RS-ACT 330Ω PTFL04BG222Q2N34B0/(MURATA) PR1 │　│　├0047 SA00004 high speed diode-RS 2A/100V BYV27-200,113 D114,D115 │　│　├0048 SA00220 diode 3A/600V SF38 D128,D129,D130,D134 │　│　├0049 SA00227 diode 5A/600V ER506(PANJIT) D122,D123,D124,D125 │　│　├0050...
  • Page 30 Rank Part No Description Specification Insert location Remark RD00130 SMD fixed resistor 1/4W 10Ω ±5% 1206 R159,R167 │　│　│　├0023 RD00133 SMD fixed resistor 1/4W 100Ω ±5% 1206 R181 │　│　│　├0024 R109,R111,R113,R134,R135,R RD00087 SMD fixed resistor 1/10W 2.0KΩ ±5% 0603 │　│　│　├0025 RD00101 SMD fixed resistor 1/10W 10KΩ...
  • Page 31 70*135*10 432C ├0035 NI00218 cable tie ALT-102SB ├0036 NF00061 assurance card-RS-C ALTO_V1.1 ├0037 NF03258 user manual-RS MS8/8A/12S/12SA ALTO_V1.1 ├0038 NB06357 carton-RS-CT MS8 ALTO_V1.3 ├0039 NA00882 PE bag-RS 0.03t*1050*680mm 12 hole_V1.0 ├0040 HA00861 power cord Europe 3P LT-312+LT-501 └0041...
  • Page 32 MS8 BOM Rank Part No Decsription Specification Insert location Remark PG02607 SPEAKER MS8_ALTO ├0001 NA00986 silk wadding-RS-CT MS 8_V1.0 ├0002 NE04372 label ├0003 HC00949 speaker socket-RS-C LD4015 ├0004 NF00061 assurance card-RS-C ALTO_V1.1 ├0005 NF03258 user manual-RS MS8/8A/12S/12SA ALTO_V1.1 ├0006 NB06357 carton-RS-CT MS8 ALTO_V1.3...
  • Page 33 M4*25mm speaker*4 ├0029 MG00762 screw-RS M5*30MM woofer*4 ├0030 NE19273 label-RS MS8_V1.0 machine*1,warranty*1, carton*2 ├0031 NE11345 label-RS ALTO PG_V1.2 machine*1,warranty*1, carton*2 ├0032 MG00060 screw M3*6 crossover and dixing board*4 ├0033 MG00042 screw M3*10 plastic label*3 ├0034 MF00012 washer φ4*φ9*0.8t_V 1.2 plastic label*3 ├0035...

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