Alto MISTRAL2500 Service Manual
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Alto MISTRAL2500 Service Manual

Power amplifiers
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Service
MODEL: MISTRAL2500/4000
www.altoproaudio.com
Version 2.0

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Summary of Contents for Alto MISTRAL2500

  • Page 1 Service MODEL: MISTRAL2500/4000 www.altoproaudio.com Version 2.0...

  • Page 2: Table Of Contents

    CONTENTS 1. Introduction..………………………………………………………….………………..2 2. Specification.…………………………………………………………….……….…….3 3. Schematic Diagram…………….…………………….……….….…………………..4 4. Wiring Diagram..……………….…………….………...…….………………….…….11 5. PCB Layout……..……………….…………….………...…….………………….…..13 6. Test Procedure…………..……………………….………………………….……..18 7. Exploded Views &Mechanical Parts List…………………………….…………..19 8. BOM.…………………………………………………………………….……………….24...

  • Page 3: Introduction

    1. Introduction ALTO MISTRAL amplifiers are series of innovative design power amplifiers. This series work under high stability with great power supply in just 2-rack spaces. Airflow is from back to front panel to keep in a nice air circulation inside the Rack. The automatic fan, which affects the temperature of machine includes various kinds of speed, therefore, this low-noise fan makes a good result in cooling the heat from machines.

  • Page 4: Specification

    2. Specification MISTRAL2500 MISTRAL4000 Output Power 20Hz~20KHz @0.1% THD, SCD MODE 8 ohms per channel (EIAJ) 450W 625W 4 ohms per channel (EIAJ) 700W 1000W BRIDGE MONO MODE 8 ohms , 1KHz, 0.1%THD 140W 2000W Distortion (SMPTE-IM) <0.05% Frequency Response 20Hz-20kHz +/- 0.1dB, -3 dB points: 10Hz-60kHz...

  • Page 5: Schematic Diagram

    CN-PCB6.3 JEF-505 JEF-505 1K 3W 1N4004 FUSE1-1 D1_28 +83V_A 1N4004 RECTIFIER BRIDGE1+ 16AT VAC FAN1-CH1 FAN OUT CH1 MISTRAL2500 Schematic Diagram 1 of 2 U1_4 JP1_6 C1_44 D1_27 LM317T CN-PCB6.3 W2-04 (1.5A 200V) 100nF/50 cer OUTPUT STAGE_A JP1_13 JP1_14 +12V...
  • Page 6 FAN OUT CH2 16AT U2_4 JP2_6 D2_27 C2_44 LM317T CN-PCB6.3 W2-04 100nF/50 cer (1.5A 200V) OUTPUT STAGE_B JP2_13 JP2_14 +12V MISTRAL2500 Schematic Diagram 2 of 2 HEADER 3 COM2 2P2.5 C2_43 JP2_7 C2_42 JP2_11 JP2_12 R2_3 10uF/63 CN-PCB6.3 470uF/35V JEF-505 JEF-505...
  • Page 7 -83V_A RECTIFIER BRIDGE1- 10AT JP1_8 R1_2 6.3x32 FUSE HOLDER -V_FAN_CH1 150R CN-PCB6.3 R1_1 RELAY POWER1 VAC FAN2-CH1 AC INPUT Titel ALTO MISTRAL4000-CH1 DRIVE PCB# MIS4000.PCB Size Model No: Revision MISTRAL4000 VER031212 Date: 29-Apr-2004 Sheet File: MIS40-CH1.Sch Drawn By: KEVIN LIN.
  • Page 8 -83V_B RECTIFIER BRIDGE2- 10AT JP2_8 R2_2 6.3x32 FUSE HOLDER -V_FAN_CH2 150R CN-PCB6.3 R2_1 RELAY POWER2 VAC FAN2 AC INPUT Titel ALTO MISTRAL4000-CH2 DRIVE PCB# MIS4000.PCB Size Model No: Revision MISTRAL4000 VER031212 Date: 29-Apr-2004 Sheet File: MIS40-CH2.Sch Drawn By: KEVIN LIN.

  • Page 12: Wiring Diagram

    4. Wiring Diagram MISTRAL4000 Chassis Wiring Drawing (100V-130V) GND2 OUT2 GND1 OUT1 GRAY HA01258 HA02471 WHITE HA01333 HA01239 WHITE GRAY HA01237 R1_5 R2_5 BLUE BLACK HA01198 JP1_1 JP2_1 (CH1_OUT) (CH2_OUT) JP1_2 JP2_2 (GND1) (GND2) JP1_13 JP2_13 HA01244 JP1_14 JP2_14 PURPLE BLACK JP1_7 JP2_7...

  • Page 13: Black

    MISTRAL4000 Chassis Wiring Drawing (220V-240V) GND2 OUT2 GND1 OUT1 GRAY HA01258 HA02471 WHITE HA01333 HA01239 WHITE GRAY HA01237 R1_5 R2_5 BLUE BLACK HA01198 JP1_1 JP2_1 (CH1_OUT) (CH2_OUT) JP1_2 JP2_2 (GND1) (GND2) JP1_13 JP2_13 HA01244 JP1_14 JP2_14 PURPLE BLACK JP1_7 JP2_7 HA02449 HA02488 GREEN...

  • Page 14: Pcb Layout

    5. PCB Layout MIS40FP2 Top overlay Bottom layer MIS40PWR Top overlay Bottom layer...
  • Page 15 MIS40SP Top layer Bottom layer Top overlay...
  • Page 16 MIS40MN-CH1 Top overlay Top layer...
  • Page 17 Bottom layer MIS40MN-CH2 Top overlay...
  • Page 18 Top layer Bottom layer...

  • Page 19: Test Procedure

    6. Test Procedure 1) Test Equipment: 1.Frequency transformer 2.Digital voltage meter 3.AP ( Audio precision ) 4.Oscilloscope 5.Two 8£ [ (400W) load 2) Test procedures and specification 1.Set LIMITER and BRIDGE switches at OFF, turn VR of CH1 and CH2 to maximum, then turn on the power switch and the blue power LED lights up, and OPERATING/PROTECTION LED shows red then become green after 2-5 seconds or so.

  • Page 20: Exploded Views &Mechanical Parts List

    7. Exploded Views & Mechanical Parts List...
  • Page 21 Mechanical Parts List (For MISTRAL2500) No. Item Number Description Specification Quantify MA04096 ZC-panel 3.1*88.8*25.5*483 MA04164 ZC-panel 1.5*83.2*22.4*422 MB02820 ZC-rear chassis 1.5t*85.5*370*430 MC00517 ZC-cover 1.5t*360*433.4 MI01744 ZB-handle 20*25.5*80 £ p 18*18mm NI02650 Plastical knob 10*£ p 22.5 black A600.2 NI02651 Knob fixing tube...
  • Page 22 Spring washer TD00175 Loop transformer PT-MIS2500-E HE00007 Fan -AD0812US-A70GL DC12V/0.3A 80*80*25mm 300mm NI00312 Power switch Square 5*5*9 hole 2.8*2.8 black HK03957 K-PCB P-MIS40MN(MISTRAL2500 HK03958 K-PCB P-MIS40PWR HK03959 K-PCB P-MIS40FP2 HK04015 K-PCB P-MIS40SP £ p 9 ME00006 £ p 9*£ p 14*0.5t...
  • Page 23 Mechanical Parts List (For MISTRAL4000) No. Item Number Description Specification Quantify MA04096 ZC-panel 3.1*88.8*25.5*483 MA04111 ZC-panel 1.5*83.2*22.4*422 MB02820 ZC-rear chassis 1.5t*85.5*370*430 MC00517 ZC-cover 1.5t*360*433.4 MI01744 ZB-handle 20*25.5*80 £ p 18*18mm NI02650 Plastical knob 10*£ p 22.5 black A600.2 NI02651 Knob fixing tube HI00031 Power supply SW R415KKETOF...
  • Page 24 MG00215 Zinc screw Outer hexagon M8*80 ME00026 Zinc nut £ p 8*£ p 18*1.5t MF00026 Color washer £ p 8*£ p 13.5*2t MF00041 Spring washer TD00217 Loop transformer PT-MIS4000-E HE00007 Fan -AD0812US-A70GL DC12V/0.3A 80*80*25mm 300mm NI00312 Power switch Square 5*5*9 hole 2.8*2.8 black HK00673 K-PCB P-MIS40MN(MISTRAL4000)

  • Page 25: Bom

    8. BOM MISTRAL2500 Parts List Part No. Description Specification Remark MA04096 panel MISTRAL4000 MA04097 panel MISTRAL4000 MA04098 panel MISTRAL4000 3.1*88.8*25.5*483 MI01309 panel 3.1*88.8*25.5*483 MA00150 panel MISTRAL2500 ALTO new_V1.0 MA04436 panel CPA 1000 MA05424 panel MISTRAL1500_V1.0 MJ00088 iron board 1.5*2135*1220 30.67kg...
  • Page 26 MISTRAL2500 Parts List Part No. Description Specification Remark £ p 18*18mm NI02650 knob 10*£ p 22.5 NI02651 knob fix sheath HC00005 AC socket AC-008 HI00031 power switch R415KKETOF SA00013 bridge rectifier 35A/200V HA01243 wire 300mm UL1015 14AWG brown HA01333 single terminal wiring CF:W76...
  • Page 27 MISTRAL2500 Parts List Part No. Description Specification Remark £ p 8*£ p 13.5*2t MF00041 washer £ p 11*£ p 90*2_V1.1 MH00766 iron piece £ p 11*£ p 90*2_V1.1 MH00768 iron piece MJ01154 iron board 2.0t*1850*950mm 27.6kg TD00175 loop transformer PT-MIS2500_115/230V £...
  • Page 28 MISTRAL2500 Parts List Part No. Description Specification Remark 470£ [ M type RA00616 fixed resistor 1/4W R2_9 1.5K£ [ M type RA00217 fixed resistor 1/4W R2_45 0.0£ [ M type RA00158 fixed resistor 1/4W R2_2 15K£ [ M type RA00246...
  • Page 29 MISTRAL2500 Parts List Part No. Description Specification Remark 220uF/16V £ p 8*11mm CB00055 electrolytic capacitor C2_37 220uF/16V NP £ p 10*12.5mm CB00171 electrolytic capacitor C2_34 220uF/25V £ p 8*11mm CB00057 electrolytic capacitor C2_8,C2_45 470uF/35V £ p 10*20mm CB00067 electrolytic capacitor...
  • Page 30 MISTRAL2500 Parts List Part No. Description Specification Remark £ p 9*1000mm NI00274 sleeve HC00324 terminal 6.5m/m (PC250) JP2_1,JP2_2,JP2_5,JP2_6,JP2_7,JP2_8 HC00056 FUSE holder 8*10.6*1.5 JEF-505 JP2_9,JP2_10,JP2_11,JP2_12 HC00112 XLR MIC jack 99M-107SP-1-2 90° PUSH J2_1 HC00111 XLR MIC jack 99M-108SP1 J2_2 HC00504 row-wire header(male) 10P 2.54mm 180°...
  • Page 31 MISTRAL2500 Parts List Part No. Description Specification Remark £ p 3 (LEG2062) SA00191 L.E.D D1_1,D2_1 SA00053 L.E.D high intensity 3m/m round(red)long foot 26mm D1+3,D2_3 SA00054 L.E.D high intensity 3m/m round(yellow)long foot 26 D1_30,D2_30 HC00066 row-wire header(male) 3P 2.5mm 90° CN1_1,CN2_1 A10K£...
  • Page 32 MISTRAL2500 Parts List Part No. Description Specification Remark HB01104 MIS40IN-2_VER031206 HC00077 row-wire header(male) 3P 2.5mm 180° HC00110 MIC jack JY-6314-02-340 HA01394 row-wire connector wiring 3P-3P 120 MD00444 protecting cover 80*80mm(K-G08A05-4HA) NF01672 instruction MISTRAL2500 ALTO_V1.3 NH00149 paper 889*640mm HK04156 PC board...
  • Page 33 MISTRAL2500 Parts List Part No. Description Specification Remark 3.3K£ [ SQM type RA00981 cement resistor 10W R1_15,R1_19 CA00010 ceramic capacitor 27PF NPO C1_10 CA00018 ceramic capacitor 56PF NPO C1_36,C1_35,C1_7 CA00024 ceramic capacitor 100PF SL C1_3,C1_4 CA00043 ceramic capacitor 0.0033uF C1_13,C1_14...
  • Page 34 MISTRAL2500 Parts List Part No. Description Specification Remark SB00021 power transistor 2SC5200 Q1_10,Q1_11,Q1_12,Q1_9 SD00032 integrated circuit LM317T U1_4 SD00173 integrated circuit NJM4580L(JRC) U1_1,U1_2 CN00060 fixed inductance L1_1 2uH 10A(CSAF-302824)(£ p 1.5mm*12 1/2T) 500£ [ (TDC5C150L) RH00021 Thermal resistor R1_3 50£ [ (TDC05A050J)
  • Page 35 MISTRAL2500 Parts List Part No. Description Specification Remark NC00005 silicone insulator TO-220 square type MG00171 screw M3*14 £ p 1*30mm ND00182 silicone sleeve £ p 1*1000mm ND00171 silicone sleeve NC00181 insulator MISTRAL4000 1.6t*136*16mm NC00041 red foil white board 1.6t*0.65M*70M MI01954 fixed bracket MISTRAL4000 1.5t*136*16mm right...
  • Page 36 Specification Remark MA04096 panel MISTRAL4000 MA04097 panel MISTRAL4000 MA04098 panel MISTRAL4000 3.1*88.8*25.5*483 MI01309 panel 3.1*88.8*25.5*483 MA00196 panel MISTRAL4000 ALTO new_V1.0 MA04436 panel CPA 1000 MA05424 panel MISTRAL1500_V1.0 MJ00088 iron board 1.5*2135*1220 30.67kg MB02820 rear board MISTRAL4000 MB02821 rear board MISTRAL4000_V1.1...
  • Page 37 MISTRAL4000 Parts List Part No. Description Specification Remark £ p 18*18mm NI02650 knob 10*£ p 22.5 NI02651 knob fix sheath HC00005 AC socket AC-008 HI00031 power switch R415KKETOF SA00200 bridge rectifier 40A/400V BP40-04 HA01243 wire 300mm UL1015 14AWG brown HA01333 single terminal wiring CF:W76 150mm UL1015 18AWG green/yellow HA01247...
  • Page 38 0.045*1M NF00061 assurance card ALTO NE11460 label MISTRAL4000 NH00012 bond paper 0.04*1M NI00014 membrane 0.035*1M NE11347 label ALTO PI NH00334 cone paper 0.040*1m NC00059 fixed board 1*46*46(Sax-2000) NC00175 insulator 1.0t*51mm*100M HK04177 PC board P-MIS40MN CH1(MISTRAL4000) HB01242 MIS40MN-CH1_VER040326 820£ [...
  • Page 39 MISTRAL4000 Parts List Part No. Description Specification Remark 330K£ [ M type RA00299 fixed resistor 1/4W R1_42,R1_48 330£ [ M type RA00200 fixed resistor 1/4W R1_10,R1_55 470£ [ M type RA00616 fixed resistor 1/4W R1_9 1.5K£ [ M type RA00217 fixed resistor 1/4W R1_45 0.0£...
  • Page 40 MISTRAL4000 Parts List Part No. Description Specification Remark 47uF/25V £ p 5*11mm CB00039 electrolytic capacitor C1_5,C1_6 47uF/63V £ p 6*11mm CB00149 electrolytic capacitor C1_33 220uF/16V £ p 8*11mm CB00055 electrolytic capacitor C1_37 220uF/16V NP £ p 10*12.5mm CB00171 electrolytic capacitor C1_34 220uF/25V £...
  • Page 41 MISTRAL4000 Parts List Part No. Description Specification Remark £ p 5 red(LI3330/A) SA00201 L.E.D £ p 9*30mm NI02779 sleeve £ p 9*1000mm NI00274 sleeve HC00324 terminal 6.5m/m (PC250) JP1_1,JP1_2,JP1_5,JP1_6,JP1_7,JP1_8 HC00056 FUSE holder 8*10.6*1.5 JEF-505 JP1_10,JP1_11,JP1_12,JP1_9 HC00112 XLR MIC jack 99M-107SP-1-2 90° PUSH J1_1 HC00111 XLR MIC jack...
  • Page 42 150mm UL1015 14AWG brown NA00116 PE bag 0.04t*170*100mm NI01867 self-adhere foot cushion 20.5*14*7.6mm(SF-006) £ p 12*£ p 16*0.5 NI00389 plastic washer NI00375 film 45*60.5*0.5mm MJ01227 cushion MISTRAL2500 MJ01228 cushion MISTRAL2500 2.0t*422*15 MJ01154 iron board 2.0t*1850*950mm 27.6kg HK00793 PC board P-MIS2500-INPUT HB01105 MIS40IN-1_VER031206...
  • Page 43 MISTRAL4000 Parts List Part No. Description Specification Remark HC00297 terminal block DT-55-A14W-03(3PH) HC00077 row-wire header(male) 3P 2.5mm 180° HC00079 row-wire header(male) 5P 2.5mm 180° HK00787 PC board P-MIS2500-INPUT(MIC jack) HB01104 MIS40IN-2_VER031206 HC00077 row-wire header(male) 3P 2.5mm 180° HC00110 MIC jack JY-6314-02-340 HA01394 row-wire connector wiring...
  • Page 44 MISTRAL4000 Parts List Part No. Description Specification Remark 12£ [ SQM type RA00870 cement resistor 5W R2_41,R2_40 2.2K£ [ SQM type RA01016 cement resistor 5W R2_23,R2_24 4.7K£ [ SQM type RA01017 cement resistor 10W R2_15,R2_19 CA00010 ceramic capacitor 27PF NPO C2_10 CA00018 ceramic capacitor...
  • Page 45 MISTRAL4000 Parts List Part No. Description Specification Remark SB00129 transistor MPSA92(TO92)/(PHI) Q2_15,Q2_16 SB00023 power transistor 2SA1943-O Q2_5,Q2_6,Q2_7,Q2_8,Q2_4,Q2_3 SB00021 power transistor 2SC5200 Q2_9,Q2_10,Q2_11,Q2_12,Q2_13,Q2_14 SD00032 integrated circuit LM317T U2_4 SD00173 integrated circuit NJM4580L(JRC) U2_1,U2_2 CN00060 fixed inductance L2_1 2uH 10A(CSAF-302824)(£ p 1.5mm*12 1/2T) 500£...
  • Page 46 MISTRAL4000 Parts List Part No. Description Specification Remark £ p 3*£ p 5*1t MF00037 washer NC00005 silicone insulator TO-220 square type MG00171 screw M3*14 £ p 1*30mm ND00182 silicone sleeve £ p 1*1000mm ND00171 silicone sleeve NC00181 insulator MISTRAL4000 1.6t*136*16mm NC00041 red foil white board 1.6t*0.65M*70M...

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Mistral4000Mistral 2500Mistral 4000

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