Alto MS8 Service Manual Download

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www.altoproaudio.com

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Version 1.0

MODEL:

MS8/MS8A

Revised on Apr,2010

Summary of Contents for MS8

Page 1: ...www altoproaudio com Version 1 0 MODEL MS8 MS8A Revised on Apr 2010 ...

Page 2: ...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: ...ch greatly decreases the resonance of the standing wave in the cabinet These cabinets uses hi density matrix spray paint technics and the bottom bracket design which make mounting quickly and flexibly Then HF compression driver and vented LF are also provided for fully professional performance The MS full range models include another Alto innovation The MODELLER Thanks to this circuitry user can s...

Page 4: ... 50W HIGH in EIAJ Standard Frequency Response MODELLER presets setting Maximum SPL 1m 118dB continuous 121dB peak 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 Active Crossover 2kHz under analog processor Input Connector LINE COMBO LINK XLR F Balanced 15K Ohm Input Sensitivity Line 0dBu Ext...

Page 5: ...M INVERTED MS8 8 WOOFER WOOFER SPEAKER Titel Size File Date Drawn By DRIVER SPEAKER Sheet Revision CROSSOVER CIRCUIT Model No 06 NOV 2008 KAIMINGLIU M S8 方塊圖 1 of MS8 VER081106 A3 1 1 2 1 1 2 B SPK2 MS8 BLOCK DIAGRAM 2 1 1 2 B SPK1 I N P U T 3 Block Diagram 3 ...

Page 6: ... INPUT 5 6 4 3 1 2 T R S B LINE INPUT SIGNAL SENSE G SIGNAL LIMIT INPUT GAIN A0 A1 A2 A3 1 2 3 4 5 6 SW1 4BIT ENCODER X1 X2 X3 HIGH OUT LOW OUT XOVER G POWER LED 15V POWER_CONNECT 15V GND 15V CN100 CN101 CN102 CN6 CN3 MS 8A MS 8A VER081117 1 1 Titel Size Date File Model NO A3 17 NOV 2008 MS 8A Revision Sheet of Drawn By YuShuaiWei MS 8A 1 1 MS8A BLOCK DIAGRAM 4 ...

Page 7: ...1 2 3 CN1 C18 2 2u 63V C19 2 2U C1 47u 25V SLL C2 47u 25V SLL D2 1N4148 A A K K D1 1N4148 3 3 4 4 2 2 1 1 D3 LED RES 15V C17 10P C24 0 1u C25 0 1u C26 0 1u C27 0 1u C28 0 1u C29 0 1u C30 0 1u C31 0 1u NOCTH LOW BOOST LOW PASS NOCTH LOW BOOST LOW PASS HF TRIM HIGH PASS HF TRIM HIGH PASS R7 0R 1 2 3 4 8 _ U1A 7 6 5 _ U1B 1 2 3 4 8 _ U2A 1 2 3 4 8 _ U3A 7 6 5 _ U3B 1 2 3 4 8 _ U4A 7 6 5 _ U4B 7 6 5 _...

Page 8: ...B 1 2 3 4 8 _ U7A 7 6 5 _ U7B 15V 15V C44 3 3NF C45 3 3NF C46 3 3NF R47 10K R37 100K R62 100 R63 0R R68 NC 1 2 CN2 FROM A SPACE OUTPUT LOW R43 10K R41 10K C37 22PF C36 22PF C51 0 1UF C52 0 1UF C49 0 1UF C50 0 1UF C53 0 1UF C54 0 1UF LOW OUT MS8A PRE PCB 2 3 MS8A PRE PCB MS8A PRE VER060531 2 3 Titel Size Date File Model NO A3 14 JAN 2009 MS8A PRE Revision Sheet of Drawn By YuShuaiWei MS8A PRE 2 3 6...

Page 9: ...F R56 10K 15V 15V R39 100K R66B NC R69 NC 1 2 CN3 HF TRIM HIGH PASS INPUT OUTPUT TO LOW R51 10K R53 10K R72 20K R71 20K R57 10K R66A 100R C56 JUMP 12dB OCT POWERMOD HIGH 65W C58 0 1U C57 0 1U 15V 15V 15V C60 0 1U C59 0 1U 15V C62 0 1U C61 0 1U FROM MODELLER C39 22PF C40 22PF HIGH OUT MS8A PRE PCB 3 3 MS8A PRE PCB MS8A PRE VER060531 3 3 Titel Size Date File Model NO A3 14 JAN 2009 MS8A PRE Revision...

Page 10: ...R506 1 A 2 K D125 ER506 D123 ER506 D124 ER506 C133 4700UF 63V C135 4700UF 63V F101 T5AL F102 T5AL DM 350W 65W 1 3 1 R173 0R 1 R158 0R C115 1000UF 100V C116 1000UF 100V R140 100K R141 100K R172 1 0R 0 5W TC 5 1 A 2 K D126 NC C157 NC Vin 2 GND 1 Vout 3 U10 AN7905 1 2 3 U8 AN7805 15V 15V A K D112 6 8V A K D113 6 8V R144 47R R145 47R C150 22UF 50V C151 22UF 50V D131 4148 D132 4148 5V 5V 1 2 3 U7 AN781...

Page 11: ... VCC VCC R112 NC R160 1K C144 NC C D 3 4 2 1 U12 H11A817C D120 1N4148 R180 NC R181 NC R120 NC R114 0R 35V 1 2 3 4 6 7 8 9 10 13 14 15 VS VS MUTE VPW VPW GND IN IN OUT BO SUR STBY U1 TDA7294 R139 27K R162 680R R136 120K R102 10K R169 22K R161 2 2K R132 4 75K C164 22UF 50V C165 22UF 50V C167 10U 50V 1 2 CN101 IN IN C166 22UF 50V C168 10UF 50V 35V R108 0R R103 2 2K D103 1N4148 35V 35V 35V C160 820U 3...

Page 12: ...11 VCC 12 VS 13 HO 14 VB 15 CSH 16 U2 IRS2092S R6 3 3K R14 8 2K R10 10R C4 10uF R45 4 7K R23 4 7R R167 10R R42 10K R29 10K R44 33K R39 33K DS2 Q107 IRFB38N20D Q104 IRFB38N20D D5 VCC C6 10uF D2 C114 0 1uF 250V C111 0 1uF 250V C113 0 1uF 250V R184 1R VCC VCC CH2 O D7 P2 5K 35V Bus CH2 R159 10R R205 1 2K DM 350W 65W 3 3 E DM 350W 65W PCB 單塊線路圖 DM 350W 65W DM 350W 65W 3 3 Titel Size Date File Model N...

Page 13: ...6 Nov 2008 KAIMINGLUI MS8 1 1 of MS8 Passi v e Crossover VER081106 A4 _ INPUT L1 1 2mH SI41 P1 C1 6 8uF 250V P2 _ PTC1 JUMP C2 2 2uF 250V R2 3R3 20W L2 0 3mH R4 39R 20W PTC2 RX050 P3 P4 _ WOOFER DRIVER _ BLACK BROWN BLACK BLUE _ LOW R1 1R5 20W DS1 I2V 2 1A C3 0 33uF 250V R3 15R 20W HB02943 1 1 11 ...

Page 14: ...By Sheet Revision Model No 17 NOV 2008 KAIMINGLIU MS8 全機配線圖 1 of MS8 VER081117 A4 1 1 1 HB00858 CROSSOVER MS8 HK10469 SPEAKER HK10451 SPEAKER HG00214 LOW HIGH LOW HIGH IN IN RED BLACK BLACK BLACK BROW BLUE WOOFER DRIVE MS8 WIRING DIAGRAM DRIVER OUT OF PHASE 12 5 Wiring Diagram ...

Page 15: ... SPEAKER HG00214 BLUE BLACK BLACK BROWN BLUE WOOFER DRIVE MS8A 全機配線圖高音反接 MS8A LOW _ 全機配線圖 Titel Size File Date Drawn By Sheet Revision Model No 17 NOV 2008 KAIMINGLIU MS8A 全機配線圖 1 of MS8A VER081117 A4 1 1 1 HIGH _ MS8A WIRING DIAGRAM DRIVER OUT OF PHASE 13 ...

Page 16: ...MS8 speaker cabinet 6 PCB Layout 14 ...

Page 17: ...MS8 speaker cabinet 15 ...

Page 18: ...MS8A active speaker cabinet 16 ...

Page 19: ...MS8A active speaker cabinet 17 ...

Page 20: ...7 Exploded View Mechanical Parts List 18 MODEL NO MS8 ...

Page 21: ...MODEL NO MS8A 19 ...

Page 22: ... 20 MODEL NO MS8A speaker module ...

Page 23: ...oam filter RS 10 50 50mm 1 14 NI02374 speaker bracket RS C ABS 70 135 10 432C 1 15 MG00360 black screw RS M4 25mm 4 tweeter bracket horn speaker 4 16 HG00214 tweeter RS PA D597NH 8Ω 15W 1 17 MG00351 black screw RS M4 16 14 crossover bracket cabinet 10 tweeter bracket 4 18 ND01106 EV foam RS 1 0t 285 15mm 2 wooden cabinet 19 ND00397 EV foam RS φ204 5 φ186 5 2 2 tweeter woofer 20 ND01107 EV foam RS ...

Page 24: ...eaker cabinet RS MS8 1 22 ND00398 EV foam RS SR500A SUB 1205 5 15 2 1 paste on module 23 HK10458 K front panel combination MS8A_230V_ ALTO 1 24 MG00403 black screw RS M4 23 4 S N Part No Description Specification Qty Remark 1 MG00061 black screw RS M3 10 4 MIC jack 2PCS XLR jack 2PCS 2 NI01863 button RS φ5 5 W10 7 5 1 3 NI02386 plastic knob RS φ14 13mm 1 4 NI01862 button handle RS C 5 5 5 5 14 5_V...

Page 25: ...nput sensitivity gain Channel faders Master faders Noise or hiss heard at output Noisy source device Disconnect the devices that are connected to yout speaker one at a time If the noise goes away the problem is with the source or the connecting cable Improper A C ground or faulty equipment connected to mixer input Disconnect or mute channels on at a time to isolate the problem Refer to the owner s...

Page 26: ...0 04t 240 160mm_V1 0 user manual warranty 0023 ND00398 EV foam SR500A SUB 1205 5 15 2_V1 0 module 0024 HK10458 faceplate RS MS 8A_100V 120V 220V 240V 0001 NI00363 knob RS φ21 16mm COOL GRAY 8C 072C_V1 1 SW1 0002 NI02386 konb RS φ14 13mm VR1 0003 NI01863 key RS φ5 5 W10 7 5_V1 3 0004 NI01862 key 5 5 5 5 14 5_V1 1 0005 MG00162 screw M3 8 fix PRE 0006 MG00041 screw M3 6 fix top cover 0007 MG00061 scr...

Page 27: ...uF 100V 5 CASE01 C16 0008 CB00194 electrolytic capacitor 47uF 25V φ5 11mm C1 C2 C7 C8 C9 C10 C11 0009 CB00248 electrolytic capacitor 2 2uF 50V ψ4 5mm C18 C19 C101 0010 CC00068 mylar capacitor 0 027uF 100V 10 C20 0011 CC00074 mylar capacitor RS ACT 0 01uF 100V 3 C21 0012 HK10604 PC board P MS8A PRE SMD 0001 RD00023 SMD fixed resistor 1 8W 2 2KΩ 5 0805 R6 0002 RD00002 SMD fixed resistor 1 8W 0 0Ω 5 ...

Page 28: ...C116 0014 CF00033 metal film capacitor MEF 0 1uF 250V 10 C111 C113 C114 0015 CF00059 metal film capacitor FKP 220PF 630V PFR5 221J630J11L4 C109 0016 CF00141 metal film capacitor MSC 0 0068uF 100V 5 CASE01 C132 0017 CF00183 metal film capacitor MSC 0 1uF 100V 5 CASE01 C112 C169 C145 C170 0018 CF00223 metal film capacitor RS MKP 0 068uF 630V 5 BFC238320683 C138 C139 0019 CG00018 filter EMI FILTER LF...

Page 29: ...ica RS 13 18 φ3 6 TO 220 latch Q104 Q105 0072 NC01179 insulator spacer RS 0 13t 40mm 55mm HI FLOW 625 ltach Q102 Q103 0073 AD00012 twin adhesive RS 90 120mm_V1 0 ZD barrier 0074 NI04253 sleeve RS φ28 50M T 2 MK00103 0075 NI00224 sleeve φ1 10mm PR1 0076 AC00603 lead free soldering bar S100 0077 HK10294 PC board RS P DM 350W 65W SMD 0001 CI00021 SMD ceramic capacitor 0805 0 001uF 50V NPO 5 C2 C22 C2...

Page 30: ...5 D106 D107 D108 D109 D110 D111 D120 D131 D132 D133 D 135 D136 0046 SE00012 SMD rectifier diode RS BAV103 PHI D2 0047 SE00018 SMD zener diode RS ACT 1 2W 6 8V LL 34 D112 D113 0048 SE00025 SMD diode RS 0 45A 85V BAV99 D119 0049 SE00038 SMD L E D green KPJA 2107SGD 90 0802 DS2 0050 SE00084 SMD zener diode RS 1W 13V ISMA4743 DO214AC PANJIT D118 0051 SE00097 SMD diode RS CT 1A 400V US1G DO214AC VISHAY...

Page 31: ...80 22 M4_V1 0 0012 HA02494 strand TA4X4YKA42W 120mm 0013 NE19179 label RS HK10451_V1 0 0028 NI04746 drop glue nameplate RS MS SERIES ALTO_V1 0 0029 NI04731 lable RS MS SERIES ALTO_V1 0 0030 HG00214 Driver RS PA D597NH 8Ω 15W 0031 ND00231 sponge RS 15 50 50mm 0032 ND00414 sponge RS φ36 25mm 0033 NI02250 MIC jack φ17 φ23 5 9 0034 NI03153 horn SR400A black_V1 0 0035 NI02374 fixed board 70 135 10 432C...

Page 32: ...3 0010 RA00995 chassis bracket 20W 39Ω SQY type R4 0011 HH00036 lamp SK3 CWT 12 8V 2 1A DS1 0012 HA01919 jump 5mm PTC1 0013 RG00012 over current protector 0 5A 60V MF R050 PTC2 0014 HC00324 connect terminal 6 5m m PC250 0015 NI02590 cable tie YJ 203V0 UL94V 0 0016 AC00603 lead free soldering bar S100 0010 MI05040 fixed board RS MS8 ALTO_V1 0 0011 MD01382 iron net RS CT MS 8_V1 0 0012 HK10451 speak...

Page 33: ...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 ND01107 EV foam RS 1 0t 465 35mm black wooden cabinet 0036 ND01106 EV foam RS 1 0t 285 15mm blac...

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Alto MS8, Service Manual

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