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Alto SR500A, Service Manual

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Alto SR500A Service Manual Download Page 1

 
 
 

 

Service Manual 

 

 

 

 

 

 

ALTO

 

REV.2 

Model:

 SR

5

00A

 

                   

 

 

Summary of Contents for SR500A

Page 1: ...Service Manual ALTO REV 2 Model SR500A...

Page 2: ...CONTENTS 1 Specifications 2 Block Diagram 3 Schematic Diagram 4 Printed Circuit Board 5 Test Procedures 6 Structural Drawing 7 Exploded View Mechanical Parts List 8 Electrical Parts List...

Page 3: ...50V V V Load____ 70V V V Load____ 100V V V Aux At 1KHz FLAT Rated W 5 Maximum at Output 10 THD Aux 1KHz dB Load W W FLAT 7 Hum or Noise VR Max Low 25 mV mV DSP OFF VR Max Hi 20 mV mV DSP OFF 8 100HZ d...

Page 4: ...B dB TUNER dB dB AUX3 CD dB dB LOW 44 0 5 dBV 60 dB 2 0 5 HI 44 2 dBV 60 dB 2 0 3 24V dB dB MIC UNBAL dB dB MIC dB dB LINE dB dB 24V dB dB MIC 2 UNBAL dB dB MIC dB dB LINE dB dB 24V dB dB MIC 3 UNBAL...

Page 5: ...P AMP LOW V V V V HI POWER SUPPLY SWITCH LOW SPEAKER HI SPEAKER LOW V LOW V HI V HI V AC INPUT 238094 DSP MODULE HPF LPF Title Size A3 Number Date File Sheet of Drawn By Revision SR500A SR500A 1 1 MO...

Page 6: ...11 12 13 14 CN1 CN 7PX2 F C17 47u 63V 1 2 3 _ IC1A 33079 C7 22P R4 10K R5 10K C6 0 0033u R3 6K8 14 13 12 _ IC3D 33079 1 3 2 DL1 SIGN LIMIT R9 1K2 15V 15V 5VD 15V 15V NC 1 OUT 2 NC 3 GND 4 GND 5 NC 6 V...

Page 7: ...R37 4E7 C35 0 0047U 7 6 5 _ IC7B MC33078 1 2 3 4 8 _ IC7A MC33078 R94 10K R93 22K R98 1K R92 1K R90 100K DL2 100P C40 100P D33 4148 D32 4148 VCC1 VCC1 VCC2 VCC2 Vin 1 GND 2 Vout 3 IC5 7815 C43 10 25V...

Page 8: ...03 4...

Page 9: ...04 1...

Page 10: ...04 2...

Page 11: ...04 3...

Page 12: ...probe to amplifier high output Par 3 Initial test Increase slowly the VARIAC voltage up to the nominal value 230Vac Check the transformer sec voltages with multimeter without signal on input F3 F4 54...

Page 13: ...generator then adjust VR1 trimmer to have a 5mV 0 5mVdc voltage drop across R24 R26 0 2 power resistors Par 8 HIGH amplifier check Select a 10KHz frequency with 1dB amplitude on signal generator Conn...

Page 14: ...7 SR500A FLAT 3 Frequency Response at2 Color Line Style Thick Data Axis Cursor1 Blue Solid 2 Anlr Bandpass Left 104 920 dBr A_ 60 110 70 80 90 100 104 92 103 097 d B S P L 20 30k 50 100 200 500 1k 2k...

Page 15: ...06 1...

Page 16: ...06 2...

Page 17: ...06 3...

Page 18: ...07 1...

Page 19: ...ape head 8 M4 30mm 8 13 NI03152 handle ABS 85 6 207 7 black_V1 0 2 14 MG00536 balck screw pill M4 20_V1 0 12 15 NI03151 handle cover ABS SR400A SR500SA black_V1 0 2 16 NC00689 K speaker wooden box SR5...

Page 20: ...SR 500A 15 435 18 2 0t black_V1 1 2 0014 ND00398 EV foam SR500A SUB 1205 5 15 2_V1 0 1 0015 ND00397 EV foam 204 5 186 5 2 black_V1 0 1 0016 HK05280 speaker 15inch 300W 4 SR500A Z008289_LP385 75 1 000...

Page 21: ...0 7 2135 1220 14 31kg 1 0038 MF00037 washer 3 2 5 5 1t 15 0039 MF00038 washer 4 7 1t 1 0040 NC00128 washer 1 6 6 8 3 5 red 11 0001 NC00172 insulation board 1 6t 65mm 0 2mm 100M 1 0041 NC00005 mica SB...

Page 22: ...00V 1 C4 0031 CF00014 metal film capacitor MEC 0 01uF 400V 10 2 C11 C12 0032 CH00017 laminated capacitor 0 1uF 50V Y5V PH5 2 C23 C26 0033 CB00010 electrolytic capacitor 1uF 50V 4 7mm 2 C1 C29 0034 CB0...

Page 23: ...HC00050 row wire header 14PIN A28b 14B T 6 1 CN1 0034 HI00162 push button switch 2 paragraphs 6p PS 22E8552L 1 SW2 0035 HC00392 balance MIC jack RS JY 5030 030G 180 1 MIC2 0036 HC00582 balance MIC jac...

Page 24: ...amic capacitor 0603 470PF 50V NPO 5 4 C8 C10 C11 C13 0025 CI00075 SMD ceramic capacitor 0603 0 1uF 50V Y5V 80 20 28 C3 C4 C5 C6 C7 C15 C16 C17 C18 C19 C21 C28 C 29 C30 0026 CI00266 SMD ceramic capacit...

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