Akai ASR-8025-SSP Service Manual

АКУСТИЧЕСКАЯ СИСТЕМА

Model:

ASR8025SSP

SERVICE MANUAL

www.akai.ru

General safety instructions Contents

g

To avoid the risk of an electronic shock, you should
not expose the device to rain or moisture. Consequently, General safety instruction--------------P2
do not use the device in the immediate vicinity of water, Exploded view of the Subwoofer----- P3
for example near a bath tub, a swimming pool or in a Exploded view of the satellite---------P4
damp cellar. Schematic diagram-----------------------P5
Use the device only for the intended purpose. Drawing of PCB board-------------P6--P9
only connect the device at a properly installed plug so­cket. Pay attention that the specified voltage corres- Familiar malfunction analysis---------P11
ponds to the voltage of plug socket.
when using external mains supply, pay attention to the

correct polarity and voltage. Always place the batteries

in the correct direction. RMS output:110W(35W+15W*5)
Assemble the device in such a way that the available Speaker Unit:
ventilation openings are not covered. subwoofer: 5.25"

Never open the housing of the device. Incorrect rep satellite: 3"*5
airs can consitute a considerable risk of the user. Distortion: 0.3% 1W 1KHz
Should the device become damaged, in particular the Frequency Response: 30Hz-20KHz
mains supply cable, do not operate the device any S/N Ratio: >=60dB
longer, but rather have it repaired by an expert. Seperation: >=45dB
Check the mains supply cable regularly for damage.
For safety reasons a broken or damaged mains lead
may only be replaced by an equivlent lead from the
manufacturer, our customer service department or
a similary qualified person.
These symbols may be found on the unit and are in
tended to indicate the following:

the lightning symbol should advise the user

of parts in the inside of the device which

carry dangerously high voltage level.

Cover------------------------------------ ----P1

Part list--------------------------------------P10

Specification Data:

the symbol with an exclamation mark should

advise the user of important operation or

maintance instructions in the accompanyin

documentation.

2

EXPLODED VIEWS OF THE SUBWOOFER

EXPLODED VIEW OF THE SATELLITE

4

D

87654321

CC

B

AA

1.0

1/1

123456789

VFD

5
4
3
2
1

VFD_POWER&AI

CON101

C31

224

IC5 TDA2030A(1006)

100P

C23

1k

R24

DZ102

IN5399

C418

220/uF35V

R422

2.2

DZ103

IN4148

C419

R423

1K

R

R26 2.2

22P

R25 18K

C30

IC7 TDA2030A(1006)

C28

100P

C37

47U/25V

R35

+28V

1

AC6V

+28V

4 11

2

R424

1uF/50V

FRONT

L

C42

224

R33 18K

1k

3

10K

R205

100k

+28V

R

R37 2.2

C39 22P

C40

47U/25V

R204

5.6K

SURROUND

L

C49

224

TDA2030A(1006)

R41 18K

IC9

100P

C44

C48

1k

R42

10

AC6V

7

8

14

U102

5

6

9

10

R203

2.7K

R202

CENTER

R43 2.2

C47 22P

47U/25V

C58

IC10 TDA2030A(1006)

100P

C50

1k

R47

LM324

13

12

1K

R201

330

Title

C66

224

R50 2.2

R46 18K

C52 22P

C57

47U/25V

224

R55 2.2

R53 18K

IC11 TDA2030A(1006)

C62 22P

100P

C63

C65

1k

47U/25V

R54

\5.1\HCS1100Z.DDB Drawn By:

AKAI

Number RevisionSize

AS-R8025/8035SSP Amplifier Schematic Diagram

Date: 15-Jun-2006 Sheet of

File: D:

R22

22K

C101 2.2U

FR VOL

C9

2.2U

R11

10K

IC3A

4558

101

R7

47K

C4

R6

10K

R13

10K

C5

104

C1

104

IC3B

4558

C4

2.2U
R21

22K

R28

C201 2.2U

FL VOL

R14

22K

C17

4.7U/25V

R17

1K

TDA2030A(1006)

IC4

R15

18K

R8

22K

SW SPEAKER

IC1

TDA2030A(1006)

C2 2.2U

1K

2.2

R20

224

C19

224

C7

2.2

R9

R5 18K

C3

1K

4.7U/25V

R13

22K

R2

C301 2.2U

SR VOL

1234567

22K

R15

R

22K

R38

IN

1234567

IN

3

22K

R16

L

R

FRONT

22K

R45

C401 2.2U

SL VOL

SW1

SW 6DPDT

L

CENTER

SURROUND

22K

R51

C501 2.2U

C2

CEN VOL

C12

100U/16V

R1 220

C21

22U/50V

104

C43

C55

4700U/25V

D2

D6

SUBWOOFER

T 1AL 250V

100U/16V

IC 4558

R3 220

IC TDA2030A(1006)

104

C8

C64

4700U/25V

D4

IN5404*4

D5

T1

12.5V*2 2.7A

2A

SW3POWER

103M/250AC

AC230V 50HZ

PLUG

D

B

1 2 3 4 5 6 7 8

DRAWING OF PCB BOARD

678

9

FAMILIAR MALFUNCTION ANALYSIS OF AFTER-SERVICE

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Malfunction 1:
P
Suggest

1) Check if power plug is well connected to power.

2) Check if switch is set in "ON"

3) Fuse was melted. (Need checked by professional and replacing)

Malfunction 2:
Pehenomenon: Subwoofer no sound
Suggest resolvent:

1) Check if turned up "master volume", subwoofer "volume"

2) Check if have set to "2.1 input"

3) Check if have input signal that under 200Hz frequency

Malfunction 3:
Pehenomenon: Whole system no sound
Suggest resolvent:

1) Check if input audio frequency cable is well connected.

2) Check if output audio frenquency equipment are working

Malfunction 4:
Pehenomenon: 5.1 Channel output no sound
Suggest resolvent:

1) Check if input cable is well connected to 5.1 channel input RCA

2) Check if "mode" have set to 5.1

Malfunction 5:
Pehenomenon: resonance while power on
Suggest resolvent:

1) Need checked & repaired by professional.

11