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Alto OEX-400 Service Manual
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Alto OEX-400 Service Manual

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Service Manual
Model: OEX-400
www.altoproaudio.com
Version: 1.2

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Summary of Contents for Alto OEX-400

  • Page 1 Service Manual Model: OEX-400 www.altoproaudio.com Version: 1.2...

  • Page 2: Table Of Contents

    CONTENT 1. Introduction.....................1 2. Specification....................2 3. Block Diagram..................4 4. Schematic Diagram.................5 5. Wiring Diagram..................10 6. Printed Circuit Board................11 7. Exploded View & Mechanical Parts List..........14 8. Electrical Parts List................19...

  • Page 3: Introduction

    1. Introduction Trolley appearance 2 (two-SPEAKER) + 1 (7-channel mixer super combination) One-way full-range speaker system 4 XLR MIC input with ultra low noise microphone pre-amplifiers and +48V PHANTOM power 1 stereo LINE input Warm, natural 2-band EQ for each channel Precision level control 24-bit DSP effects with powerful algorithms (16 presets) Extremely high headroom offering excellent dynamic range...

  • Page 4: Specification

    2.Technical Specification Mixer Section - 2 -...
  • Page 5 Speaker Section Power Section Physical - 3 -...

  • Page 6: Block Diagram

    3. Block Diagram X1-3A 2-STAGE EQ POWER MODEII CH INPUT RMS 300W MASTER SPK OUT1 LEVEL (CH1~3) BAL/UNBAL XLR&TRS 7-STAGE EQ X1-3B DSP/FX AUX1 POST MASTER SPK OUT2 XLR&TRS LOW BOOST CON4 +22V +15V POWER SUPPLY MAIN LEVEL POWER_CONNECT -22V OEX-400_MIXER MONITOR LEVEL -15V...

  • Page 7: Schematic Diagram

    4. Schematic Diagram C100 MAIN-BUS XLR&TRS B50K R103 47u/25V 47u/25V C102 EQ HI R124 C65 22P 47u/25V 10KHZ 47u/25V 4N7(M) R132 47u/25V W50K R101 47u/25V 47u/25V CH1 XLR INPUT 4580M 4580M 100HZ 4580M FX-SEND 47u/25V CH1 TRS INPUT 4580M R100 R102 4.7u/50V B50K...
  • Page 8 R115 C107 C106 VR13 B50K 47u/25V R135 C109 C110 EQ HI R127 VR15 47u/25V 47u/25V 10KHZ W50K R161 4N7(M) 4580M MAIN-BUS 47u/25V CH4/5-IN R113 47u/25V EFFECT-IN 4580M 100HZ 47u/25V 4580M 47u/25V U12A VR14 R112 R114 U14B 4580M 4.7u/50V B50K 4N7(M) 4580M PRE/POST VR16...
  • Page 9 CI00185 C115 C116 C238 MN-EQ-SOURCE R184 100nF C117 680R 47u/25V R120 R173 R264 27.0K R172 MAIN-IN-EQ R175 R189 R176 C237 U23A VR21 U16A 4580M W50K 47u/25V R44 0.22u/50V 4580M MN-EQ-OOL-1 U10B C198 MN-EQ-OOL-2 U16B R178 4580M C197 R177 4580M R262 R265 C239 15.0K...
  • Page 10 63HZ FREQUENCY BAND 1KHZ FREQUENCY BAND 16KHZ FREQUENCY BAND MN-EQ-OOL-1 MN-EQ-OOL-1 MN-EQ-OOL-1 R218 R219 R220 MN-EQ-SOURCE MN-EQ-SOURCE MN-EQ-SOURCE U23B U25A U26B W100K W100K W100K R227 R231 R210 4580V R226 220N 4580V R230 4580V R209 VR24A VR27A VR30A MN-EQ-OOL-2 C199 MN-EQ-OOL-2 C204 MN-EQ-OOL-2 C208...
  • Page 11 C216 1N4002 1000U/35V LM317T +VCC LM7805CT R211 +Vout AUX-RETURN-R C217 100N C218 C219 R238 C228 C230 100N 100N 1N4002 100R R236 C215 DSP-OUT-R 1000U/25V 470U/16V R212 AUX-RETURN-L R240 C226 1.1K 10U/25V DSP-OUT-L R228 J176 47u/25V R167 R237 U27A C214 4580M U31A CON3 C227...

  • Page 12: Wiring Diagram

    5. Wiring Diagram - 10 -...

  • Page 13: Printed Circuit Board

    6. Printed Circuit Board - 11 -...
  • Page 14 - 12 -...
  • Page 15 - 13 -...

  • Page 16: Exploded View & Mechanical Parts List

    7. Exploded Views & Mechanical Parts List - 14 -...
  • Page 17 - 15 -...
  • Page 18 FAS10-10 MF00021 washer φ8*φ23*2t MG00079 screw M4*16*0.7PH NI04007 fixed board OEX-400-12 NI04012 fixed board OEX-400-13 MA05828 OEX-400 ALTO_V1.0 ZC-panel-SR#2000 5204 silver gray MI03373 ZC-fixed board OEX400 230V~50Hz_V1.0 MI03193 fixed bracket-left OEX-400-14 MI03192 fixed bracket-right OEX-400-18 MI03198 fixed bracket OEX-400-19...
  • Page 19 BOX OEX-400-01 NI04006 panel MIX OEX-400-02 NI04008 handle OEX-400-10 NI04011 speaker front panel OEX-400 135*336.2*342.63_V1.0 NI04010 speaker rear panel OEX-400 285.77*333.35*344.6 _V1.0 HC00125 MIC socket-RS JY-6351G-02-250 HK06258 K-PC board P-OEX400_XOVER MG00582 black-plated screw M3*12 MD00747 ZB-grill OEX-400_V1.0 HK06401 K-speaker 10”...
  • Page 20 MG00640 fixed shaft φ10*31.5_V1.0 MI03189 ZB-fixed bracket OEX-400 right_V1.0 MI03187 ZB-fixed bracket OEX-400 left_V1.0 MI03184 ZD-fixed bracket-OEX400-09 OEX-400 1.5t*93*28*20 right_V1.0 MI03185 ZD-fixed bracket-OEX400-08 OEX-400 1.5t*93*28*20 left_V1.0 NI04011 speaker panel OEX-400 135*336.2*342.63_V1.0 NI04009 speaker rear panel OEX-400 285.75*332.97*344.66 rear_V1.0 - 18 -...

  • Page 21: Electrical Parts List

    2P 275mm UL1185 28AWG HA00375 wire-RS 100mm black L5R5 HA00401 wire 400mm black L5R5 HA01391 row-wire connector wiring 3P-3P 200 HA00049 wire-RS 54mm black L3R3 OEX-400 350.22*153*355.8 NI04005 panel-RS 1578g_V1.2 OEX-400 350.05*156.25*355.75 NI04006 panel 1566g_V1.0 OEX-400 155.5*39.94*23.49_V NI04008 handle OEX-400 NI04007 fixed board 135.04*41.66*59.46_V1.0...
  • Page 22 OEX-400 MI03198 fixed bracket 1.2t*88.5*10*28.5_V1.1 MJ00063 iron board 1.2*2135*1220 24.54kg MI03197 fixed bracket-RS OEX-400 1.2t*53*11.2*20_V1.2 MJ00063 iron board 1.2*2135*1220 24.54kg NI04013 bottom cover FAS-10 55.706*56*17.241_V1.0 NI04014 plastic key-RS-POM FAS-10 33.6*14*12.67_V1.2 MG00647 fixing shaft FAS-10 φ6*47.5_V1.0 MK00110 spring-RS FAS-10 φ0.7*4_V1.1 MK00109 spring FAS-10 φ0.8*3.2_V1.0...
  • Page 23 HC00858 terminal block-RS 2P 2EHDV-02P male HC00856 terminal block-RS 5P 2EHDV-05P male CN11 SA00113 zener diode 1/2W 2.4V 2C2 SA00309 high speed diode-RS BYW51FP-200(TO220AB)/(ST) D13,D12,D11 SA00316 bridge rectifier-RS 8A GBU-8K/(PANJIT) F3_PZ1,F3_PZ2,F2_PZ2,F2_P HC00063 FUSE holder JEF-501 (5.2mm) 3.15A 250V φ5.2*20mm HD00071 ceramic tube fuse F3A,F2A CSA/S/T/UL/VDE...
  • Page 24 DD3,DD8,DD10,DD12,DD2,DD4 ME00226 screw-RS M3*0.5PH ,DD6,DD9,DD11,DD5,DD7,DD1 VT6,VT2,VT11,VT26,VT22,VT MG00694 screw-RS M2.9*9.5 18,VT27,VT23 VT12,VT5,VT1,VT10,VT9,VT2 MG00693 screw-RS M3*6*0.5PH 5,VT21,VT17 AC00179 tin without lead-RS M705E Sn 3Ag-0.5Cu P-PWRMOD350/65(PowerSoft)- HK07154 PC board CI00046 SMD ceramic capacitor 1206 1uF/16V Y5V-1206(3216) C39,C38,C45,C30 CI00044 SMD ceramic capacitor 1206 0.0047uF/50V NPO C48,C55 CI00212 SMD ceramic capacitor1206...
  • Page 25 R64,R61,R46,R45,R43,R44,R 7,R47,R28,R11,R48,R41,R40 RD00399 SMD precise resistor 1/4W 10.0KΩ ± 1% 1206 ,R102,R30,R52,R49,R50,R51 ,R32,R36,R39,R101,R35,R33 ,R34,R37,R58 RD00603 SMD precise resistor-RS 1/4W 22.1KΩ± 1% 1206 R115 RD00463 SMD precise resistor 1/4W 22.0Ω ± 1% 1206 R21,R20 RD00600 SMD precise resistor-RS 1/4W 68.0Ω ± 1% 1206 R85,R86,R83,R65,R66,R84 R62,R18,R17,R63,R59,R19,R RD00255...
  • Page 26 RH00033 thermistor-RS-CT 5Ω B57235S-0509M000/(EPCOS) R10 NE16887 lable-RS POWERMOD_V1.0 NI00015 membrane 0.04*1M NH00013 bond paper 0.045*1M MF00018 washer φ4*φ10*1t_V1.0 MF00105 washer φ4*φ10*1t_V1.0 MJ00058 single light board 1*2135*1220 20.45kg MH02230 rivet-RS 4*12 HA01919 jump HA02249 wire φ0.6_鍍錫 DC24V/2000RPM 80*80*25mm HE00132 fan-RS 125mm JST2.5 ME00016 color nut 4m/m...
  • Page 27 400mm brown L5R5 ND00206 silicone sleeve φ6*140mm ND00202 silicone sleeve φ6*1000mm MH02354 fixed bolt-RS-CT FAS-10 φ3.4*55.5_V1.2 HK06935 speaker module OEX400 front OEX-400 135*336.2*342.63 NI04011 speaker panel-RS 590g+-15G_V1.1 MI04169 fixed bracket-RS OEX-400_V1.0 AE00055 solvent solvent AE00239 paint-RS 5252 black OEX-400...
  • Page 28 NH00012 bond paper 0.04*1M NH00461 cushion-RS φ210*11*6 8hole HG00213 Driver-RS PA-D588NH 8Ω 15W MG00675 screw-RS M4*15mm_V1.0 NI04207 O-shape loop OEX-400 φ1.5*1105_V1.1 NI04222 label OEX 400 ALTO_V1.0 NE15987 lable OEX 400 ALTO_V1.0 ND00706 EV foam-RS 1.5t*760*12mm black_V1.0 MG00488 screw-RS M3.5*15 NI00218...
  • Page 29 CF00090 metal-film capacitor MEF 3.3uF/250V 5% AC00179 tin without lead-RS M705E Sn 3Ag-0.5Cu MG00582 screw M3*12 MG00352 screw-RS M4*25 OEX-400 155.5*39.94*23.49_V NI04008 handle MD00747 grille OEX-400_V1.0 AE00055 solvent solvent AE00228 paint-RS 5204 MD00746 grille OEX-400 0.8t*φ262*5_V1.0 0.8t*300*300(φ MD00752 grille 3.0*4.0PH*60° )_V1.0 10 inch 120W 6Ω(10 inch...
  • Page 30 0.03t*1200*800mm 12 NA00279 clip-chain bag 0.04t*100*150mm_V1.0 NB04661 carboard-RS-T OEX-400 410*410mm_V1.0 NB04663 paper defend horn-RS-T OEX-400 425*48mm_V1.1 NB04664 carboard-RS-T OEX-400 down 425*213mm_V1.0 NB04665 carboard-RS-T OEX-400 up 425*195mm_V1.0 NB04666 carton-RS OEX-400 ALTO_V1.2 NE11750 label ALTO PC NH00334 cone paper 0.040*1m NE16007 lable-RS OEX-400_V1.0...
  • Page 31 φ24 2016 NH00049 ventilation paper 86*18.5 #3 AC00179 tin without lead-RS M705E Sn 3Ag-0.5Cu HC00033 quick male jack 89M-101 HK07796 faceplate-RS OEX-400-MIXER HK04833 PC board P-313123-DIP(OEX600) SC00004 crystal oscillator 16.00MHZ 2.54 180° 2*8P(gold-plated) HC00484 connector 13.5/19mm SST39VF010-70n/OEX600 SG00325...
  • Page 32 SMD rectifier diode RLS4148 0.5A (LL-34) SG00068 SMD integrated circuit 74HC14DT(SO14)/(PHI) IC41LV16256- SG00410 SMD integrated circuit-RS-ACT 35KG(SOJ40)/(ICSI) SG00166 SMD integrated circuit TY-2 ALTO(GMCODE:105022) SG00147 SMD integrated circuit CHEF DSP(GMCODE:105022) SG00037 SMD integrated circuit LD1117DT33C(TO252)/(ST) HC00611 IC socket (SMD) PLCC32 (AMP S/N:822516-7) SG00016...
  • Page 33 NI02249 plastic washer TW-1(TO-220) U32,U33,U34 B50KΩ RD09F113A231- VR1,VR2,VR5,VR6,VR9,VR10, RC00678 potentiometer-RS 50K2BT(SAS) VR13,VR14,VR17,VR18 HK06479 PC board P-OEX-400-MIX-SMD R138,R139,R140,R141,R142, RD00061 SMD fixed resistor 1/10W 10Ω ± 5% 0603 R143,R144,R145,R146,R147, R236 RD00064 SMD fixed resistor 1/10W 43Ω ± 5% 0603 R194 RD00069 SMD fixed resistor 1/10W 120Ω...
  • Page 34 RD00124 SMD fixed resistor 1/10W 820KΩ ± 5% 0603 R245 R124,R125,R126,R127,R128, RD00125 SMD fixed resistor 1/10W 1.0MΩ ± 5% 0603 R129,R130,R131 RD00126 SMD fixed resistor 1/10W 2.2MΩ ± 5% 0603 R244 RD00347 SMD fixed resistor 1/10W 510Ω ± 5% 0603 R195 10PF/50V C0G±...
  • Page 35 SMD fixed resistor 1/10W 0.0Ω ± 5% 0603 R228 SG00243 SMD integrated circuit NE555DR(SO8)/(TI) RD00415 SMD precise resistor 1/10W 4.70KΩ ± 1% 0603 R169 HK06478 PC board P-OEX-400-MIX-AI HA01918 jump JP1,JP2 RA00157 fixed resistor 1/4W 0Ω R263 RA01109 fixed resistor 1/4W 1KΩ R250...
  • Page 36 1N4002/100V D23,D24,D25,D26 CB00236 electrolytic capacitor 220uF/35V φ10*12mm C231,C216 RA01129 precise resistor 1/4W 1.1KΩ ± 1% R240,R241 HB01969 PCB-RS OEX-400-MIX_VER060930 MA05828 panel OEX-400 ALTO_V1.0 MA05656 panel OEX-400 AE00055 solvent solvent AE00228 paint-RS 5204 MA05655 panel OEX-400 _V1.0 ME00113 iron pillar M3*13.8*0.5PH_V1.1...
  • Page 37 NI02677 knob cover φ8.5*4 534C blue NI02867 knob cover φ7*3.5 221U_V1.0 NF02775 user manual-RS OEX400 ALTO_V1.0 NH00149 paper 889*640mm NA00671 silk wadding-RS-CT OEX 400_V1.0 - 35 -...