Alto SR400A Service Manual Download Page 23

││  │└0001-------------------------

MI00316

connect terminal

PFM-15SA

1

││  │ └0001------------------------

MJ00747

single light board

0.8t*21.6mm*100M 22.5kg

1

││  └0003---------------------------

ME00106

iron pillar

M3*24*0.5PH_V1.1

3

│├0002-------------------------------

MI01679

heat-sink

4.5*40*162mm

1

│├0003-------------------------------

TD00343

transformer

PT-4HA_230V

1

│├0004-------------------------------

HI00022

power switch-RS

4p black frame red key

1

│├0005-------------------------------

HC00005

AC socket-RS

AC-008

1

│├0006-------------------------------

NI01862

key

5.5*5.5*14.5_V1.1

1

│├0007-------------------------------

NI01863

key-RS

φ5.5*W10*7.5

1

│├0008-------------------------------

NI02386

konb

φ14*13mm

1

│├0009-------------------------------

NI00437

rubber coil

φ20*φ120*2tB

1

│├0010-------------------------------

MG00405

screw

M6*60*1.0PH

1

│├0011-------------------------------

ME00014

color nut

6*1.0

1

│├0012-------------------------------

MF00130

MIC jack

φ6.3*φ19*1t_v1.0

1

││└0001-----------------------------

MF00051

washer

φ6.3*φ19*1t_V1.0

1

││ └0001----------------------------

MJ00058

single light board

1*2135*1220 20.45kg

1

│├0013-------------------------------

MF00040

washer

φ6*φ10*1.5t

1

│├0014-------------------------------

SA00012

bridge rectifier

25A/600V BP25-06PWS

1

│├0015-------------------------------

RH00007

thermistor

330Ω (PTH9L04BD222TS2F330)

1

│├0016-------------------------------

SD00074

integrated circuit

L7805CV(TO-220)(ST)

1

│├0017-------------------------------

SD00077

integrated circuit

L7815CV(TO-220)(ST)(MOROCCO)

1

│├0018-------------------------------

SD00079

integrated circuit

L7915CV(TO-220)(ST)

1

│├0019-------------------------------

SB00057

transistor

TIP35C

1

│├0020-------------------------------

SB00058

transistor

TIP36C

1

│├0021-------------------------------

SB00040

transistor

MJE15030

2

│├0022-------------------------------

SB00041

transistor

MJE15031

2

│├0023-------------------------------

SB00086

transistor

MJE802P

1

│├0024-------------------------------

SB00021

power transistor

2SC5200

1

│├0025-------------------------------

SB00023

power transistor

2SA1943-O

1

│├0026-------------------------------

HA01253

signle terminal wiring

150mm UL1015 18AWG white

2

│├0027-------------------------------

HA01252

wire

80 green/yellow

1

│├0028-------------------------------

HA02571

wire

14P-14P PH1.27 75mm

1

│├0029-------------------------------

MG00284

copper pillar

M3*8*0.5PH

6

│├0030-------------------------------

MG00304

copper pillar

M3*14*0.5PH

2

│├0031-------------------------------

MG00363

copper pillar

M3*14*0.5PH

3

│├0032-------------------------------

MG00024

screw

M3*7 0.5PH

19

│├0033-------------------------------

MG00027

screw

M3*12

13

│├0034-------------------------------

MG00042

screw

M3*10

2

│├0035-------------------------------

MG00327

screw

M3*10*0.5PH

4

│├0036-------------------------------

MG00069

screw

M4*16

1

│├0037-------------------------------

MF00014

washer

φ3*φ6.5*0.5t

19

│├0038-------------------------------

MF00136

washer

φ3*φ5.5*0.7t_V1.0

13

││└0001-----------------------------

MF00034

washer

φ3*φ5.5*0.7t_V1.0

1

││ └0001----------------------------

MJ00060

single light board

0.7*2135*1220 14.31kg

1

│├0039-------------------------------

MF00037

washer

φ3.2*φ5.5*1t

7

│├0040-------------------------------

MF00038

washer

φ4*φ7*1t

1

│├0041-------------------------------

NC00128

washer

1.6*φ6.8*φ3.5 red

10

││└0001-----------------------------

NC00172

insulation board

1.6t*65mm(-0.2mm)*100M

1

│├0042-------------------------------

NC00005

mica

SB-9500DSP 18*13*0.1t_V1.0

8

│├0043-------------------------------

NC00127

mica

22*28

5

│├0044-------------------------------

NI00863

plastic washer

TO220B

10

│├0045-------------------------------

NI00218

cable tie

ALT-102SB

6

│├0046-------------------------------

HK04349

PC board

P-313120-1-DIP-SR300A

1

││├0001-----------------------------

HK01401

PC board

P-313120-1-SMD-PS 4HA

1

│││├0001---------------------------

HB00851

PCB

313120-1_VER031014

1

│││├0002---------------------------

RD00061

SMD fixed resistor 1/10W

10Ω ±

5% 0603

1 R73

│││├0003---------------------------

RD00076

SMD fixed resistor 1/10W

330Ω ±5% 0603

1 R48

│││├0004---------------------------

RD00080

SMD fixed resistor 1/10W

680Ω ±5% 0603

1 R2

│││├0005---------------------------

RD00083

SMD fixed resistor 1/10W

1.0KΩ ±

5% 0603

3 R4,R76,R80

│││├0006---------------------------

RD00093

SMD fixed resistor 1/10W

4.7KΩ ±

5% 0603

1 R64

│││├0007---------------------------

RD00101

SMD fixed resistor 1/10W

10KΩ ±5% 0603

9

R6,R11,R30,R35,R36,
R47,R61,R62,R63

│││├0008---------------------------

RD00103

SMD fixed resistor 1/10W

15KΩ ±5% 0603

2 R71,R78

│││├0009---------------------------

RD00105

SMD fixed resistor 1/10W

22KΩ ±5% 0603

4 R1,R3,R5,R77

│││├0010---------------------------

RD00109

SMD fixed resistor 1/10W

39KΩ ±5% 0603

1 R7

│││├0011---------------------------

RD00114

SMD fixed resistor 1/10W

68KΩ ±5% 0603

1 R49

│││├0012---------------------------

RD00111

SMD fixed resistor 1/10W

47KΩ ±5% 0603

3 R60,R70,R75

│││├0013---------------------------

RD00116

SMD fixed resistor 1/10W

100KΩ ±

5% 0603

1 R74

│││├0014---------------------------

RD00118

SMD fixed resistor 1/10W

150KΩ ±

5% 0603

1 R46

│││├0015---------------------------

RD00417

SMD precise resistor 1/4W

27.0KΩ ±1% 1206

1 D21

08-2

Summary of Contents for SR400A

Page 1: ...Service Manual ALTO REV 2 Model SR400A...

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: ...d____ 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 Line Max Low 7 mV mV DSP OFF VR Line Max Hi 7 mV mV DSP OFF 8 100HZ dB 1...

Page 4: ...22KHz HI 50 0 5 dBV 60 dB 0 5 1 25Hz 22KHz 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 dB dB MIC dB dB LINE dB dB 24V dB dB M...

Page 5: ...OW 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 SR400A SR400A BLOCK DIAGRAM...

Page 6: ...2 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 7 N...

Page 7: ...4 T6 3A F2 T6 3A D1 KBPC25 D4 GBU8D D2 1N4002 C2 0 01uF400V C1 400V 10N S1 S4 S3 S5 S2 VCC1 VCC1 VCC2 VCC2 Vac KBU806 BP25 06PWS Title Size A4 Number Date File Sheet of Drawn By Revision SR400A P 3131...

Page 8: ...R14 10E R26 4E7 C27 0 0047U 7 6 5 _ IC6B MC33078 1 2 3 4 8 _ IC6A MC33078 1 2 3 4 8 _ IC5A MC33078 7 6 5 _ IC5B MC33078 R78 15K R77 22K R80 1K R76 1K R75 47K R74 100K R71 15K R70 47K R73 10E R11 10K D...

Page 9: ...04 1...

Page 10: ...TOPLAYER TOPOVERLAY BOTTOMLAYER 04 2...

Page 11: ...04 4...

Page 12: ...04 3...

Page 13: ...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 S1 S2 90V 1 5Va...

Page 14: ...ifier Decrease to zero the signal generator then adjust VR1 trimmer to have a 5mV 0 5mVdc voltage drop across R13 R15 0 22 power resistors Par 8 HIGH amplifier check Select a 10KHz frequency with 0dB...

Page 15: ...peaker Module Test Condition 1 Short circuit 2P pins of CN1 on DSP board 313115 1 board 2 LINE INPUT 1kHz LOW output 2V 4Ohm 3 The upper curve is for treble output frequency response and the lower one...

Page 16: ...05 4...

Page 17: ...06 1...

Page 18: ...06 2...

Page 19: ...06 3...

Page 20: ...07 1...

Page 21: ...14 NI03152 headle ABS 85 6 207 7 black _V1 0 2 15 MG00361 black screw pill M4 20mm 12 16 NI031151 handle cover ABS SR 400A SR 500SA black_V1 0 2 17 NC00217 K speaker wooden box SR 400A 12 inch PLYWOO...

Page 22: ...61 screw M4 20mm 12 0010 ND00381 absorb sound sponge 30 300 400mm_V1 0 1 0011 ND00382 absorb sound sponge 30 400 750mm_V1 0 1 0012 MG00351 screw M4 16 10 0013 ND00367 EV foam 2 0t 100 18mm black_V1 0...

Page 23: ...G00363 copper pillar M3 14 0 5PH 3 0032 MG00024 screw M3 7 0 5PH 19 0033 MG00027 screw M3 12 13 0034 MG00042 screw M3 10 2 0035 MG00327 screw M3 10 0 5PH 4 0036 MG00069 screw M4 16 1 0037 MF00014 wash...

Page 24: ...Y5E 2 C21 C24 0028 CA00040 ceramic capacitor 0 001uF Z5V 1 C1 0029 CA00069 ceramic capacitor 390PF Y5E 2 C39 C40 0030 CH00017 laminated capacitor 0 1uF 50V Y5V PH5 2 C16 C19 0031 CC00012 mylar capaci...

Page 25: ...JY 5030 030G 180 1 MIC2 0036 HC00582 balance MIC jack NCJ6FI V NEUTRIK 1 MIC1 0037 TC00004 transformer SEV1924 03 EE 19 1 L1 0038 CG00018 filter EMI FILTER LF 22UH WAH TAYI 2 L2 L3 0039 NI02532 LED sp...

Page 26: ...I00063 SMD ceramic 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 C2 8 C29 C30 0026 CI00266 SMD c...

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