Alto SR500A Manuale utente

Service Manual

ALTO

REV.2

Model: SR500A

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

Test Result

Model No: SR500A Test Date:20050711 Tester: MO GUO ZHU

Test Item Test Conditions Spec Test Result Remark

Power Source AC: 230V；50 Hz

Idle Current AC 230 V No-Load 5 ±0.5 mV mV across R26 &R24

Power

Consumption

Rated Output.

Aux At 1KHz A

FLAT

Rated Output Lo

w Load

:4Ω 34~36V THD:0.25↓V

Hi Load

:8Ω 19~20V THD:0.3↓_______V

Load

16Ω V_______V

Load ____Ω （25V ）

Load____Ω （50V ）

Load____Ω （70V ）

Load____Ω （100V ）

Aux At 1KHz FLAT.

Rated W

Maximum at

Output 10% THD

Aux 1KHz dB

Load Ω WWFLAT

Hum or Noise

VR Max （Low ） 25↓ mV mV DSP OFF

VR Max（Hi ） 20↓ mV mV DSP OFF

100HZ:

dB 100HZ: dB

Tone control

Response Input From Aux

Output At 1W 10KHZ: dB 10KHZ: dB

Puncture Voltage

5mA ，

5Sec 3750V V

MONITOR Aux 1KHz dB Load Ω

FLAT

MONITOR NO:

AUX,TAPE,TUNER,CD,MIC1,MIC2

CD PLAYER 1KHz 0dB

TUNER AM/FM

PRIORITY MIC1

TEL.PAGING 1KHz____dB

Load____Ω_______V

G-T___dB；

G-R___dB。

G-T___dB；G-R___dB。

FLAT

ZONE PAGING 100V ALL/ Z1，

Z2，Z3，Z4

AC : OUTPUT

REMOTE AC OUT or DC OUT

01-1

Test Result

Model No：SR500A Test Date: 20050711 Tester：MO GUO ZHU

Test Item 1. Input

Sensitivity 2. Signal/Noise 3. Distortion at

1W 4. Distortion at

Rated 5. Frequency

Response

Test Conditions

Test Result

FLAT Rated

Output 36V/20V

Load 4 Ω

FLAT Rated

Output 36V/20V

Load 4Ω

FLAT Output

at 2V Load 4Ω

FLAT Rated

Output 36V

Load 4 Ω

FLAT Output at

2V Load 4Ω

Low OUT

-3±0.5dBV

80↑ dB

0.8↓%

0.5↓%

Hi OUT

0.5±0.3dBV

80↑ dB

0.5↓%

0.1↓%

TUNER

LINE

CD dB

AUX dB

TAPE dB

TUNER

AUX2

CD dB

AUX dB

TAPE dB

TUNER

AUX3

CD dB

LOW -44 ±0.5dBV

60↑ dB

2↓ %

0.5 ↓%

HI -44 ±2dBV

60 ↑dB

2↓ %

0.3 ↓%

24V dB

MIC

UNBAL

MIC dB

LINE dB

24V dB

MIC-2

UNBAL

MIC dB

LINE dB

24V dB

MIC-3

UNBAL

MIC dB

LINE dB

24V dB

MIC-4

UNBAL

Remark

1.When the above item are tested, short-circuit the row pin of 1, 2 pin of 313115-1(DSP board)CN1. After

test, remove the short circuit terminal.

2.Load connection: connect 4Ohm load to LOW output, and 8Ohm to Hi output.

3.Please check if bass BOOST circuit is normal. When the bass output is below 17V(ON LOAD),BOOST

circuit does not operate. When the bass output is above 17V(ON LOAD), BOOST circuit starts to operate.

Authorization by：Check by：

01-2

1234

321

POWER SWITCH

MIX AMP PRE AMP

HI PRE

LOW PRE LOW POWER

HI POWER

AMP

LOW

V+ & V- V+ & V-

POWER SUPPLY

SWITCH

LOW SPEAKER

HI SPEAKER

LOW V+

LOW V-

HI V-

HI V+

AC INPUT

238094

DSP MODULE

HPF

LPF

Title

Size:

Number

Date:

File: Sheet of:

Drawn By:

Revision

SR500A

1/1

MO GUO ZHU

VER1.0

第版

SR500A BLOCK DIAGRAM

SIGNAL INPUT

VOLUME

130 deg SW

T6.3A

LINE IN

02-1

12345678

7654321

MIC2

CN-BAL-MALE

ZD5

12V1W

ZD2

12V1W

ZD4

12V1W

ZD3

12V1W

R16

15K

R19

15K

R18

15K

R15

15K

R14

390E

_IC3A

33079 7

_IC3B

33079

10 +

IC3C

33079

12 +

IC3D

33079

C23

22P

C20

22P

C19

22P

C26

22P

C27

0.01uF/400V

R22

10E

SW2A

SW PS-22E85L

SW2B

SW PS-22E85L

GND

3VR1

D50K

R17

4.7K

R21

820E

10 +

_IC1C

33079

C16

0.0033u

R12

10K

R10

10K

_IC1B

33079

0.0033u

10K

R11

6K8

C21

47u/63V

C22

47u/63V

1 2

3 4

5 6

7 8

910

1112

1314

1516

1718

1920

CN2

CN-10PX2-180

910

1112

1314

CN1

CN-7PX2-F

C17

47u/63V

_IC1A

33079

22P

10K

0.0033u

6K8

12 +

IC3D

33079

DL1

SIGN/LIMIT

1K2

+15V

-15V

+5VD

+15V

-15V

NC 1

OUT 2

NC 3

GND

4GND

NC 6

V+ 7

NC 8

NC 9

GND

12 GND

OSC

NC 16

IC2

L4962

220u/63V

330P

C12

0.0022u

3K9

15K

0.033u

C13

2u2 100V

TP-SEV1924-03

C25

470u/25V SLL*

C24

1000u/6V3

+5VD

BYV27

R13 330E

11 4

IC1E

33079

11 4

IC3E

33079

C14

470u/25V SLL

C10

470u/25V SLL

C15

0.1u

C11

0.1u

+15V

-15V

CLIP

SIGNAL

X1X2

MIC1

XLR

+5VA

HIGH

LOW

HIGH INPUT

+4dB

FL5R

FL5R C28

10u/63V

C18

10u/63V

C29

10u/63V

Title

Size:

Number

Date:

File: Sheet of:

Drawn By:

Revision

SR400A-PRE

P-110018-SR400A

2003/12/10

PS 4HA 1/1

Lian Ming Tan

VER1.0

TO 313120-1 AMP PCB

1第版

SW1

VR-SW

03-1

1 2 3 4 5 6 78

7654321

R38

390E

R44

R49

68K

R50

4K7

R51

12K

R42

470E

R34

820E R35

68E

R33

12K

R32

8K2

R63

8K2

R62

47E

R64

47K

R65

2K2

R66

R43

12K

R29

470E

R31

12K

R22

560E

R23 1K5

R67

8K2

R69

47E

R77

8K2

R76

12K

R39

68E

R36

820E

R55

68K

R40

12K R56

4K7

R53

390E

R27

470E

R54

2K2

R68

47K

C24

0.0047U

C31

470P

C28

470P

C33

0.0018U

C22

100P

C13

0.001U

C32

0.0018U

C21

100P

TR11

NJE350

TR15

MJE350

TR10

MJE340

TR7

MJE340

TR12

2N5401

TR12

2N5551

D16

1N4002

TR1

MJE802

R45

12K 2W

D15

10 1W

D19

10V 1W

C25

220U/25V

D18

1N4002

D29

1N4002

D30

1N4002

D17

1N4002

VR1 500E

C14

10/50V

TR25

MJE340

TR19

NJE15031 TR9

TIP36C

TR6

MJE15030

TR4

2SC5200

R29 10E

R30

4E7

D28

1N4002

6A2

C23

0.1U

TR23

MJE350

TR8

MJE15031

TR24

MJE15030

TR5

2SA1943

TR18

TIP35C

D13

1N4002

6A2

R70

47K

R74

4K7

R73

10K

R21

47K

D14

1N4148

TR21

BC847

TR26

BC847

TR20

BC847

TR27

BC857

TR22

BC857

TR13

BC32725

TR17

BC857

C34

1000U/6V3

C30

220U/50V

R59

330E

R46

10K

R60

33K

R58

10K

R71

10K

R72

10K

R48

470E

R47

10K

R57

150K

C29

1U/50V C26

0.1U

C20

0.0047U

R52

12K2W

C27

220U 25V

R26

0E2 5W

R24

0E2 5W

C17

0.0047U

D12

1N4148

D10

1N4148

R25

10E

R37

4E7

C35

0.0047U

_IC7B

MC33078

IC7A

MC33078

R94

10K

R93 22K

R98

R92

R90

100K

DL2 100P

C40 100P

D33

4148 D32

4148

+VCC1

-VCC1

+VCC2

-VCC2

Vin

GND

Vout 3

IC5

7815 C43

10/25V

C42

10/25V

C15

10000/80V

C16

10000/80V

Vin

GND

Vout 3

IC3 7805

C37

1000U 6.3V

R79

47E/5W C38

2200U/63V

+VCC1

-VCC1

+VCC2

-VCC2

-15V

+5VA

+15V

-15V

+15V

-15V

R78

100E PTC

+15V

or NJL21184

or SIMILAR

or MJL21193

+15V

C45

10U NP

910

1112

1314

CN1

CN-7PX2-F

+15V

RL1

OZ-SS-124LM1

DC 24V 16A

+5VA

-15V

S10

LOW OUT+

GND

LOW SPEAKER

FROM 313127 INPUT PCB

SOFT START

OFFSET PROTECTION

-8.3V

14.8V

11.1V

14.2V

11.6V

10.97V

0.1V

-0.56V

0.58V

27.5V

9.6V

32.1V

-32.4V-27.7V

-7.6V

-0.33V

-1.4V

+1.4V

T8A

KBPC25

KBU806

1N4002

C11

0.01uF400V

400V/10N

BP25-06PWS

TR1

2SC5200

R19

0E2 5W

or NJL21184

TR2

2SA1943

or MJL21193

R20

0E2 5W

C18

10000U/50V

C19

10000U/50V

4002

GND 1

Vin

2Vout 3

IC4

7905

IC5A

MC33078

_IC5B

MC33078

R71

15K R70 47K

R73

10E

R11

10K

22UF/50V

10UF/50V

DL1 47P

MUTE

ST-BY

IC1

TDA7294

22K

R21

10K

R32

33K

R12

22K

R12

10E 0.5W

0.1U

4148

680E

+VCC1

-VCC1

+15V

-15V

1U 50V NP

TDA7294

HIGH OUT +

GND

Hi SPEAKER

TR16

BC857

1N4148

R30

10K

AC INPUT

BREAKER

PT-PS5HA-220V

BLA

RED

YEL

03-2

03-4

04-1

04-2

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