Alto SR400A Service Manual Download Page 25

││├0005-----------------------------

RA00356

fixed resistor 1/8W

1.2KΩ M type

1 R9

││├0006-----------------------------

RA00373

fixed resistor 1/8W

3.9KΩ M type

1 R8

││├0007-----------------------------

RA00375

fixed resistor 1/8W

4.7KΩ M type

1 R17

││├0008-----------------------------

RA00382

fixed resistor 1/8W

6.8KΩ M type

3 R1,R3,R11

││├0009-----------------------------

RA00386

fixed resistor 1/8W

10KΩ M type

6 R2,R4,R5,R7,R10,R12

││├0010-----------------------------

RA00390

fixed resistor 1/8W

15KΩ M type

5 R6,R15,R16,R18,R19

││├0011-----------------------------

HI00205

rotary switch

SDB161PVB25FS-1-4-16-16PC

1 SW1

││├0012-----------------------------

RA00159

fixed resistor 1/4W

10Ω Mr type

1 R22

││├0013-----------------------------

RC00375

potentiometer

B50KΩ R0911NOB-V1B503FN01-01

1 VR1

││├0014-----------------------------

CA00009

ceramic capacitor

22PF/50V NPO

5 C7,C19,C20,C23,C26

││├0015-----------------------------

CA00032

ceramic capacitor

330PF Y5E

1 C9

││├0016-----------------------------

CF00005

metal-film capacitor MSC

0.0022uF/63V 5% CASE01

1 C12

││├0017-----------------------------

CF00052

metal-film capacitor

0.0033uF/63V 5% CASE01

3 C5,C6,C16

││├0018-----------------------------

CF00014

metal-film capacitor MEC

0.01uF/400V 10%

1 C27

││├0019-----------------------------

CF00023

metal-film capacitor MSC

0.033uF/63V 5% CASE01

1 C8

││├0020-----------------------------

CH00017

laminated capacitor

0.1uF/50V Y5V PH5

2 C11,C15

││├0021-----------------------------

CB00137

electrolytic capacitor

2.2uF/100V φ5*11mm

1 C13

││├0022-----------------------------

CB00185

electrolytic capacitor

10uF/63V φ5*11mm

2 C28,C29

││├0023-----------------------------

CB00127

electrolytic capacitor

47uF/63V φ6*11mm

5 C1,C2,C17,C21,C22

││├0024-----------------------------

CB00151

electrolytic capacitor

220uF/63V φ10*16mm

1 C4

││├0025-----------------------------

CB00066

electrolytic capacitor

470uF/25V 105℃ φ10*16mm

3 C10,C14,C25

││├0026-----------------------------

CB00069

electrolytic capacitor

1000uF/6.3V φ8*11mm

1 C24

││├0027-----------------------------

SA00004

high speed diode

2A/100V BYV27-200,113

1 D1

││├0028-----------------------------

SA00105

zener diode

1W 12V 1N4742

4 ZD2,ZD3,ZD4,ZD5

││├0029-----------------------------

SA00051

L.E.D

φ3 orange,green BOG303b

1 DL1

││├0030-----------------------------

SD00135

integrated circuit

MC33079N

2 IC1,IC3

││├0031-----------------------------

SD00047

integrated circuit

L4962/A

1 IC2

││├0032-----------------------------

HC00154

connector

2.54 180° 2*10P(gold-plated) 6/11.6mm

1 CN2

││├0033-----------------------------

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 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 spacer support

LEDS-22 22mm

2 DL1,DL2

││├0040-----------------------------

HA01934

jump

2mm

1 C18

││├0041-----------------------------

RA00399

fixed resistor 1/8W

27KΩ M type

1 R20

││├0042-----------------------------

SA00052

L.E.D

φ3 round(green)long foot 26

1 DL2

││└0043-----------------------------

AC00179

tin without lead

M705E Sn 3Ag-0.5Cu

40

│├0048-------------------------------

HK03801

PC board

P-313121-1

1

││├0001-----------------------------

HB00854

PCB

313121-1_VER030318

1

││├0002-----------------------------

CF00014

metal-film capacitor MEC

0.01uF/400V 10%

2 C1,C2

││├0003-----------------------------

SA00094

rectifier diode

1N4002/100V

1 D2

││├0004-----------------------------

SA00007

bridge rectifier

8A KBU-806 comb type

1 D4

││├0005-----------------------------

HC00062

FUSE holder

JEF-501L

8 F1,F2,F3,F4

││├0006-----------------------------

HC00324

connect terminal

6.5m/m (PC250)

5 S1,S2,S3,S4,S5

││├0007-----------------------------

HD00018

glass tube fuse

6.3A 250V φ5.2*20mm CCEE/CSA/S/UL/VDE

4 F1,F2,F3,F4

││├0008-----------------------------

MH00764

copper drill

2*4

2 D4

││├0009-----------------------------

HA02307

wire

6P 160mm

1

││└0010-----------------------------

AC00179

tin without lead

M705E Sn 3Ag-0.5Cu

40

│├0049-------------------------------

NI02672

knob

φ21*16mm

1

│└0050-------------------------------

HK05846

PC board

P-313115-3-DIP-

1

│ ├0001------------------------------

SC00319

crystal oscillator

12.288MHZ

1 XT1

│ ├0002------------------------------

NE16149

lable

CS:7EFA_V1.0

1

│ │├0001----------------------------

NI00034

membrane

0.045*1M

1

│ │└0002----------------------------

NH00014

bond paper

0.05*1M white

1

│ ├0003------------------------------

HC00145

connector

2.54 90° 2P(gold-plated) 6/14mm  1.2mm

1

│ ├0004------------------------------

HC00492

connector

20PIN B22-2*10BGA1

1 CN2

│ ├0005------------------------------

CB00166

electrolytic capacitor

100uF/16V φ6*5mm

1 C60

│ ├0006------------------------------

CB00069

electrolytic capacitor

1000uF/6.3V φ8*11mm

2 C62,C64

│ ├0007------------------------------

CB00201

electrolytic capacitor

47uF/25V φ6*7mm

8

C23,C24,C25,C26,C38,
C39,C57,C58

│ ├0008------------------------------

CB00026

electrolytic capacitor

10uF/50V φ6*7mm

2 C55,C56

│ ├0009------------------------------

SG00341

SMD integrated circuit

EN29LV040-70JC/ CS:7EFA

1 IC2

│ │└0001----------------------------

SG00337

integrated circuit

EN29LV040-70JC(PLCC32)/(EON)

1

│ ├0010------------------------------

HK04891

PC board

P-313115-3-SMD-ALTO

1

│ │├0001----------------------------

SG00069

SMD integrated circuit

MAX709L-CSA

1 IC5

│ │├0002----------------------------

SF00009

voltage stabilized transistor

LM1117MP-3.3 (3.3V, SOT223)

1 IC9

│ │├0003----------------------------

RD00068

SMD fixed resistor 1/10W

100Ω ±5% 0603

4 R1,R29,R30,R39

│ │├0004----------------------------

RD00076

SMD fixed resistor 1/10W

330Ω ±5% 0603

1 R49

08-4

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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