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Alto SR500SA Service Manual
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Alto SR500SA Service Manual

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Service Manual
Model: SR500SA
ALTO
REV.2

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Summary of Contents for Alto SR500SA

  • Page 1 Service Manual Model: SR500SA ALTO REV.2...
  • 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: Zone Paging

    Test Result Model No: SR 500SA Test Date: 20041004 Tester: mo guo zhu Test Item Test Conditions Spec Test Result Remark Power Source AC: 230V；50 Hz Idle Current AC 2 3 0 V No-Load 3 ± 0 . 5 mV across R26&R24 Power Rated Output.
  • Page 4 Test Result Model No：SR500SA Test Date: 20041004 Tester： mo guo zhu Test Item 1. Input 2. Signal/Noise 3. Distortion at 4. Distortion at 5. Frequency Sensitivity Rated Response Test Conditions FLAT Rated FLAT Rated FLAT Output FLAT Rated FLAT Output at...
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  • Page 11 Instruments required: 1) Sinusoidal signal generator, 4) Variac 0-250 Vac, 5) Resistive load 4 Ω 8 00W, 2) Dual trace scope, with probe, 3) Digital multimeter, 6) Pink noise from the GM “AUDIO CD”. P.S: Isolate the oscilloscope from earth and adjust the two traces on center of screen in GND position.

  • Page 12: Testing Procedure

    TESTING PROCEDURE - Switch ON the LOW amplifier output to 4Ω load resistor and repeat the above booster check verifying more or less the same ± VCC1 conditions and verify that the signal must be symmetrical refer to GND, without detectable distortion and oscillation. Increase the VOLUME pot.
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  • Page 18 M3*16 ND00537 ZC-grille-black SR 500A-SUB_V1.0 black MG00530 black screw-T headψ10 M3*30mm HG00129 speaker _bass 15吋 4Ω SR500SA(Z008288_LP385.75) ND00394 EV sponge-one side adhesive 2.0t*115*115 dark black V1.0 ND00395 EV sponge-one side adhesive 100*30*1 dark black_V1.0 ND00399 EV sponge-one side adhesive SR500A-SUB 100*30*1 dark black_V1.0 MG00338 black screw-T head ψ8...
  • Page 19 ND00394 EV foam 100*110*2_V1.0 ├0005--------------------------------- ND00398 EV foam SR500A-SUB 1205.5*15*2_V1.0 ├0006--------------------------------- ND00399 EV foam SR500A-SUB 490*15*2t_V1.1 ├0007--------------------------------- HK05278 speaker 15inch 300W 4Ω SR500SA(Z008288_LP385.75 │├0001------------------------------- HG00177 voice coil-RS A09090A_BK 75-55-335/22*4P-3_V1.0 │├0002------------------------------- NH00345 cone B08250A_U-SONIC CP312/32-SC348A/6-F_V1.0 │├0003------------------------------- NH00237 cushion C0910A_GR 385/6+2 │├0004-------------------------------...
  • Page 20 SR500SA_ALTO_230V PC00298 SR500SA REVISED: 2006/5/30 LEVEL PART NO DESCRIPTION SPECIFICATION QTY REFERENCE │├0015------------------------------- SA00012 bridge rectifier 25A/600V BP25-06PWS │├0016------------------------------- RH00007 thermistor 330Ω (PTH9L04BD222TS2F330) │├0017------------------------------- SD00074 integrated circuit L7805CV(TO-220)(ST) │├0018------------------------------- SD00077 integrated circuit L7815CV(TO-220)(ST)(MOROCCO) │├0019------------------------------- SD00079 integrated circuit L7915CV(TO-220)(ST) │├0020------------------------------- SB00057...
  • Page 21 SR500SA_ALTO_230V PC00298 SR500SA REVISED: 2006/5/30 LEVEL PART NO DESCRIPTION SPECIFICATION QTY REFERENCE ││├0031----------------------------- TC00004 transformer SEV1924-03(EE-19) ││├0032----------------------------- CG00018 filter-EMI FILTER LF-22UH(WAH TAYI) L1,L2,L3,L4 ││├0033----------------------------- NI02532 LED spacer support LEDS-22 22mm DL1,DL2 ││├0034----------------------------- RA00656 fixed resistor 1/8W 27KΩ M type ││├0035-----------------------------...
  • Page 22 SR500SA_ALTO_230V PC00298 SR500SA REVISED: 2006/5/30 LEVEL PART NO DESCRIPTION SPECIFICATION QTY REFERENCE │││├0004--------------------------- RD00093 4.7KΩ ± 5% 0603 SMD fixed resistor 1/10W R46,R47,R58,R71,R72, │││├0005--------------------------- RD00101 10KΩ ± 5% 0603 SMD fixed resistor 1/10W R73,R94 │││├0006--------------------------- RD00105 SMD fixed resistor 1/10W 22KΩ...
  • Page 23 SR500SA_ALTO_230V PC00298 SR500SA REVISED: 2006/5/30 LEVEL PART NO DESCRIPTION SPECIFICATION QTY REFERENCE │└0001------------------------------- NH00334 cone paper 0.040*1m ├0014--------------------------------- NE13566 label SR 500SA_V1.1 │├0001------------------------------- NH00012 bond paper 0.04*1M │└0002------------------------------- NI00014 membrane 0.035*1M ├0015--------------------------------- NF00061 assurance card ALTO ├0016--------------------------------- NA00296 PE bag 0.05t*1100*1300mm...