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Alto DPA 900 Service Manual
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Alto DPA 900 Service Manual

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MODEL: PS 4LA
MODEL: DPA 900/1500
www.altoproaudio.com
Version 2.0

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Summary of Contents for Alto DPA 900

  • Page 1 MODEL: PS 4LA MODEL: DPA 900/1500 www.altoproaudio.com Version 2.0...

  • Page 2: Table Of Contents

    CONTENT 1. Introduction………………………………………………....2 2. Specification……………………………………………………………3 3. Schematic Diagram……………………………………………………4 4. PCB Layout…………………………………………………………….13 5. Test Procedure & Test Result……………………………………..18 6. Exploded Views & Mechanical Parts List………………………...23 7. BOM………………………………………………………………...…...26...

  • 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. Air flow is from back to front panel to keep in a nice air circulation inside the Rack. The automatic fan, which affects machines’...

  • Page 4: Specification

    2. Specification Output Power DPA 900 DPA 1500 20Hz-20KHz @0.1% THD, SCD MODE 8Ohms per channel(EIAJ) 190W 300W 4Ohms per channel (EIAJ) 300W 500W Bridge MONO mode 8Ohms ,1KHz, 0.1% THD 600W 1000W Distortion (SMPTE-IM) <0.05% Frequency response 20Hz-20KHz=/-0.1dB, -3dB points:10Hz-60Hz Damping factor ,1 kHz and below >300 at 8 Ohms...

  • Page 5: Schematic Diagram

    D1_4 Q1_6 CN-PCB6.3 2 R1_39 MPSA42 J1_10 R1_40 PTC 65R 5mm RED LED R1_34 100R GND1 Vic- F1_2 CN-PCB6.3 -73V_A Titel ALTO MISTRAL1500-CH1 DRIVE Size Model No: Revision MISTRAL1500 VER040302 Date: 16-Mar-2004 Sheet 2 of File: MIS9-CH1.Sch Drawn By: C.C.LIN...
  • Page 6 D1_4 Q1_6 CN-PCB6.3 2 R1_39 MPSA42 J1_10 R1_40 PTC 65R 5mm RED LED R1_34 100R GND1 Vic- F1_2 CN-PCB6.3 -73V_A Titel ALTO MISTRAL1500-CH1 DRIVE Size Model No: Revision MISTRAL1500 VER040302 Date: 2-Mar-2004 Sheet 2 of File: MIS15-CH1.Sch Drawn By: C.C.LIN...
  • Page 7 D1_4 Q1_6 CN-PCB6.3 2 R1_39 MPSA42 J1_10 R1_40 PTC 65R 5mm RED LED R1_34 100R GND1 Vic- F1_2 CN-PCB6.3 -73V_A Titel ALTO MISTRAL1500-CH1 DRIVE Size Model No: Revision MISTRAL1500 VER040302 Date: 2-Mar-2004 Sheet 2 of File: MIS15-CH1.Sch Drawn By: C.C.LIN...
  • Page 8 D2_4 Q2_6 CN-PCB6.3 2 R2_39 MPSA42 J2_10 R2_40 PTC 65R 5mm RED LED R2_34 100R GND1 Vic2- F2_2 CN-PCB6.3 -73V_B Titel ALTO MISTRAL1500-CH1 DRIVE Size Model No: Revision MISTRAL1500 VER040302 Date: 2-Mar-2004 Sheet 3 of File: MIS15-CH2.Sch Drawn By: C.C.LIN...

  • Page 14: Pcb Layout

    4.PCB Layout MIS15FP Top overlay Bottom layer...
  • Page 15 MIS151N1 Top overlay Bottom layer MIS151N2 Top overlay Bottom layer...
  • Page 16 MIS15MN Top layer...
  • Page 17 Top overlay...
  • Page 18 Bottom layer...

  • Page 19: Test Procedure & Test Result

    5. Test Procedure & Test Result DPA900/1500 TEST PROCEDURE DSP Test Instruments 1. DMM 2. Audio Analyze unit (VP-7724) 3. Oscillograph 4. PC with RS232 port Test Procedure Step1: Visual check Visually check if the cosmetic of the amplifier and assembly are OK. Step2: Set up Turn off power Set the output sine wave signal of the VP-7724 is 0.775V(0dB)/1KHz, then connect output...
  • Page 20 Step6: Test RAM 1. Press “ENTER” and “SEL” at the same time again, the LED(NOISE GATE) will light up, wait a few seconds, check as following: a. If the display show “02”, the test is ok. b. If the display show “E2”, the test fails . Step7.
  • Page 21 front panel is lit up, the power consumption is less than 150W(DPA900/1500) while it is in short protection. 5.S/N: larger than 90dB(A weighted is more than 100dB). 6. Compressor function test: Turn on LIMITER switch. Input a 1KHz / +10dB signal, the LIMITER LED is lit yellow and there is no clipped signal.
  • Page 22 Test Result SEKAKU ELECTRON INDUSTRY CO., LTD. Model No DPA900 (Amplifier) USER OF VP-7724A Test Item Test Conditions Spec Test Result Remark Power Source 115/120/230/240V AC: R-17(CH1)R2- Motionless State Load 4Ω 17(CH2):125± R1-16(CH1)/R2-16(CH2) Current 3.2A Rated Output. Input at 3 Power Consumption VR MAX(CLIP ON) 1KHz,6dBV 736W...
  • Page 23 SEKAKU ELECTRON INDUSTRY CO., LTD. Model No DPA1500 (Amplifier) USER OF VP-7724A Test Test Item Test Conditions Spec Remark Result Power Source 115/120/230/240V AC: R-17(CH1)R2- Motionless State R1-16(CH1)/R2- Load 4Ω 17(CH2):130±2mV Current 16(CH2) 5.6A Rated Output. Input at 3 Power Consumption VR MAX(CLIP ON) 1KHz,6dBV 1288W...

  • Page 24: Exploded Views & Mechanical Parts List

    6. Exploded Views & Mechanical Parts List...
  • Page 25 DPA900 Part No. Descriptions Specification MA04096 panel MISTRAL4000 MA04165 panel MISTRAL900 ALTO MB03071 chassis MISTRAL900 MC00559 DPA1500 MI01744 Handle MISTRAL40000 20*25.5*80 MI01900 Fixed DPA1500-05 DPA1500 1.0t* 112*81*15mm MI01746 Rear board MISTRAL4000 14*81*89 MJ01227 cushion MISTRAL2500 MI02025 Fixed panel MISTRAL900(left )
  • Page 26 DPA1500 Part No. Descriptions Specification MA04096 panel MISTRAL4000 MA04165 panel MISTRAL1500 ALTO MB03071 chassis MISTRAL1500 MC00559 DPA1500 MI01744 Handle MISTRAL40000 20*25.5*80 MI01900 Fixed DPA1500-05 DPA1500 1.0t* 112*81*15mm MI01746 Rear board MISTRAL4000 14*81*89 MJ01227 cushion MISTRAL2500 MI02025 Fixed panel MISTRAL900(left )

  • Page 27: Bom

    7.BOM DPA900 part list Part No. Descriptions 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 MA04400 panel DPA900 ALTO_V1.0 MA04395 panel DPA4000 MA04396 panel DPA4000 1.5t*22.4*81.4*422 MJ00088 single light board 1.5*2135*1220 30.67kg MB03068 rear board DPA1500_V1.0 MB03069 rear board DPA1500_V1.1...
  • Page 28 Part No. Descriptions Specification Remark MJ00061 Zn-plated board 1*2135*1220 20.45kg NI02650 knob φ18*18mm 10*φ22.5 NI02651 knob fix sheath HC00005 AC socket AC-008 HI00031 power switch R415KKETOF HA01243 wire 300mm UL1015 14AWG brown HA01333 150mm UL1015 18AWG green/yellow single terminal wiringCF:W76 HA01247 single terminal wiring 180mm UL1015 14AWG blue...
  • Page 29 0.08*1M NF00061 assurance card ALTO NE05044 label DPA900_V1.0 NH00012 bond paper 0.04*1M NI00014 membrane 0.035*1M NE11347 label ALTO PI NH00334 cone paper 0.040*1m NB02086 MACRO NB01944 barrier PSA-3000_V1.1 MG00027 screw M3*12 HA01658 6P-6P PH1.27 65 header wiring FL-0464A HA01659 header wiring FL-0464A 8P-8P PH1.27 75...
  • Page 30 Part No. Descriptions Specification Remark 820Ω M type RA00211 fixed resistor 1/4W R1-9,R2-9,R1-10,R2-10 3.3KΩ M type RA00227 fixed resistor 1/4W R1,R4 4.7KΩ M type RA00231 fixed resistor 1/4W R1-41,R1-42,R2-41,R2-42 6.8KΩ M type RA00236 fixed resistor 1/4W R1-40,R2-40,R1-27,R2-27 R1-1,R1-2,R1-3,R2-1,R22, 10KΩ M type RA00242 fixed resistor 1/4W R2-3,R1-28,R2-28...
  • Page 31 Part No. Descriptions Specification Remark HC00504 row-wire header 10P 2.54mm 180° HC00172 row-wire header 3P 3.96mm 180° HC00365 row-wire header 14P 2.54mm 180°(C03-14AG1) HC00625 row-wire header 14P 2.5mm 180° HC00076 row-wire header 2P 2.5mm 180° J1-6,J2-6,J3 HC00077 row-wire header 3P 2.5mm 180° R1-29,R2-29 J1-4,J1-5,J2-4,J2-5,J17, HC00324 terminal...
  • Page 32 Part No. Descriptions Specification Remark 1uF/50V φ4*7mm CB00009 electrolytic capacitor 1.0KΩ F type RA00713 fixed resistor 1/4W C1-27,C2-27 AC00002 solder wire 63/37% HK03958 PC board P-MIS40PWR HB00946 MIS40PWR_VER030710 HC00324 terminal 6.5m/m (PC250) P1,P2,P3,P4,P5,P6,P7,P8 CG00044 metal oxide varsities NP35L-Y2 K2-2 AC00002 solder wire 63/37% HK02069...
  • Page 33 Part No. Descriptions Specification Remark HC00110 MIC jack JY-6314-02-340 HC00112 balance MIC jack 99M-107SP-1-2 90° PUSH HC00111 balance MIC jack 99M-108SP1 HC00077 row-wire header 3P 2.5mm 180° CN7,CN8 AC00002 solder wire 63/37% HK00793 PC board P-MIS2500-INPUT HB01105 MIS40IN-1_VER031206 HC00297 terminal block DT-55-A14W-03(3PH) HC00077 row-wire header 3P 2.5mm 180°...
  • Page 34 Part No. Descriptions Specification Remark HC00050 row-wire header 14PIN A28b-14B.T.6 HC00051 row-wire header 20PIN A28b-20B.T.6 HA01919 jumper wire J1,J2,J3,J6,J9 HA02249 wire φ0.6 HA01917 jumper wire J4,J8,J10 HA01920 jumper wire J5,J7,J3 HA02249 wire φ0.6 DL1,DL10,DL11,DL4,DL5, NI01771 LED spacer support LEDS-5 5mm DL6,DL7,DL8,DL9 MG00269 screw M3*6...
  • Page 35 Part No. Descriptions Specification Remark SG00040 SMD integrated circuit MC33078DT(ST)MC33078D(ON) U1,U2 SE00030 SMD rectifier diode SFS1B D2,D3,D4,D5 2.2KΩ ±5% 0603 RD00088 R5,R7 SMD fixed resistor 1/10W AE00221 tin soldering paste SJ-617 AC00002 solder wire 63/37% HK03830 PC board P-313089-4-DIP 100uF/25V φ6*11mm CB00048 electrolytic capacitor 1000uF/6.3V φ8*11mm...
  • Page 36 Remark SG00025 SMD integrated circuit 24LC64I/SN SG00184 SMD integrated circuit EN29F040A-70JC/DPA SG00217 SMD integrated circuit EN29F040A-70JC(PL032)/(E-ON) SG00335 SMD integrated circuit TY-1 ALTO(LEM NO#105008)_V1.1 SG00128 SMD integrated circuit RED 208(LEM NO#105008) SG00069 SMD integrated circuit MAX709L-CSA CO00006 SMD chip inductance BLM21A102SPT/(MURATA)
  • Page 37 Part No. Descriptions Specification Remark NI02245 heat conduction rubber 25*25*0.25 white (3M #9890) HA02621 computer connect wire 9P(female)-9P(female) UL2464 28AWG 5000m NI01863 φ5.5*W10*7.5 NF01981 instruction DPA900/1500 ALTO_V1.0 NH00231 paper 889*554mm MG00588 screw 4.75*11.8mm NI02145 acrylic panel DPA series ALTO_V1.1 NI02146 acrylic panel DPA4000 (3t*40*47mm) NE02717...
  • Page 38 DPA1500 part list No. Part No. Descriptions 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 MA04397 panel DPA1500 ALTO_V1.0 MA04395 panel DPA4000 MA04396 panel DPA4000 1.5t*22.4*81.4*422 MJ00088 single light board 1.5*2135*1220 30.67kg MB03068 rear board DPA1500_V1.0 10 MB03069...
  • Page 39 No. Part No. Descriptions Specification Remark 10*φ22.5 43 NI02651 knob fix sheath 44 HC00005 AC socket AC-008 45 HI00031 power switch R415KKETOF 46 HA01243 wire 300mm UL1015 14AWG brown 47 HA01333 150mm UL1015 18AWG green/yellow SingleterminalwiringCF:W76 48 HA01247 Single terminal wiring 180mm UL1015 14AWG blue 49 HA01248 single terminal wiring...
  • Page 40 DPA1500 220-240V/50Hz_V1.0 97 NI00044 adhesive label 0.085*1M 98 NI00022 membrane 0.08*1M 99 NF00061 assurance card ALTO 100 NE11347 label ALTO PI 101 NH00334 cone paper 0.040*1m 102 NB02086 MACRO 103 NB01944 barrier PSA-3000_V1.1 104 MG00027 screw M3*12 105 HA01658 header wiring FL-0464A 6P-6P PH1.27 65...
  • Page 41 No. Part No. Descriptions Specification Remark 12KΩ M type 127 RA00244 fixed resistor 1/4W R1-6,R2-6,R1-37 47KΩ M type 128 RA00266 fixed resistor 1/4W R1-34,R2-34 100KΩ M type 129 RA00282 fixed resistor 1/4W R1-35,R2-35 120KΩ M type 130 RA00284 fixed resistor 1/4W R1-36,R2-36 3.3KΩ...
  • Page 42 No. Part No. Descriptions Specification Remark 167 HC00076 row-wire header 2P 2.5mm 180° J1-6,J2-6,J3 168 HC00077 row-wire header 3P 2.5mm 180° R1-29,R2-29 J1-4,J1-5,J2-4,J2-5,J1-7, 169 HC00324 terminal 6.5m/m (PC250) J1-8,J1-9,J1-10,J2-7,J2-8, J2-9,J2-10 170 CN00060 fixed inductance 2uH 10A(CSAF-302824)(φ1.5mm*12 1/2T) L1-1,L2-1 171 SB00042 transistor MJE15032 Q1-1,Q2-1...
  • Page 43 No. Part No. Descriptions Specification Remark 209 HB00946 MIS40PWR_VER030710 P1,P2,P3,P4,P5,P6,P7, 210 HC00324 terminal 6.5m/m (PC250) 211 CG00044 metal oxide varsities NP35L-Y2 K2-2 212 AC00002 solder wire 63/37% 213 HK02069 PC board P-MIS15FP 214 HB01168 MIS15FP(2*4)_VER040204 φ3 round(red)long foot 26mm 215 SA00053 L.E.D D1-3,D2-3 D1-1,D2-1,D1-30,D2-...
  • Page 44 No. Part No. Descriptions Specification Remark 251 AC00002 solder wire 63/37% 252 HK00793 PC board P-MIS2500-INPUT 253 HB01105 MIS40IN-1_VER031206 254 HC00297 terminal block DT-55-A14W-03(3PH) 255 HC00077 row-wire header 3P 2.5mm 180° 256 HC00079 row-wire header 5P 2.5mm 180° 257 AC00002 solder wire 63/37% 258 HK03847...
  • Page 45 No. Part No. Descriptions Specification Remark 292 HA02249 wire φ0.6 293 HA01917 jumper wire J4,J8,J10 294 HA01920 jumper wire J5,J7,J3 295 HA02249 wire φ0.6 DL1,DL10,DL11,DL4,DL5,DL 296 NI01771 LED spacer support LEDS-5 5mm 6,DL7,DL8,DL9 297 MG00269 screw M3*6 298 NI01876 LED spacer support 7.6*4.5*184 299 AC00002 solder wire...
  • Page 46 No. Part No. Descriptions Specification Remark 334 AE00221 tin soldering paste SJ-617 335 AC00002 solder wire 63/37% 336 HK03830 PC board P-313089-4-DIP 100uF/25V φ6*11mm 337 CB00048 electrolytic capacitor 1000uF/6.3V φ8*11mm 338 CB00069 electrolytic capacitor 10.0KΩ M type 339 RA00515 precise resistor 1/4W R12,R13 340 HC00080 row-wire header...
  • Page 47 No. Part No. Descriptions Specification Remark 373 SG00217 SMD integrated circuit EN29F040A-70JC(PL032)/(E-ON) 374 SG00335 SMD integrated circuit TY-1 ALTO(LEM NO#105008)_V1.1 375 SG00128 SMD integrated circuit RED 208(LEM NO#105008) 376 SG00069 SMD integrated circuit MAX709L-CSA 377 CO00006 SMD chip inductance BLM21A102SPT/(MURATA)
  • Page 48 No. Part No. Descriptions Specification Remark 414 NH00012 bond paper 0.04*1M 415 NI00014 membrane 0.035*1M 416 NI01863 φ5.5*W10*7.5 417 NF01981 instruction DPA900/1500 ALTO_V1.0 418 NH00231 paper 889*554mm 419 MG00588 screw 4.75*11.8mm 420 NI02145 acrylic panel DPA series ALTO_V1.1 421 NI02146 acrylic panel DPA4000 (3t*40*47mm)

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