Service Manual SW090freeservicemanuals.info/en/servicemanuals/download/... · 2020. 11. 25. · ZD902 C305 C401 C415 R402 C402 C903 C902 C901 D903 D902 D901 C905 CN901 J105 T4A/250V

ServiceServiceServiceServiceService

Technical Specifications

Mains Voltage : 120V

Mains Frequency : 60Hz

Output Power (55Hz, 500mV, 10% THD) : 40W at 4 ohm load

Input Sensitivity : < 500mV

S/N Ratio (80Hz, 500mV) : > 60dB*

Minimum Volume Hum & Noise : < 3mV

Frequency Response (-3dB) Low :

2

Dismantling the Front Assembly1. Place the Subwoofer Box upside down and use a screw

driver (minus type) to force open the front assembly from

the rear as shown in the picture 1.

2. To service/replace the rotary potmeter on the front, the

Port Edge (pos. 6) which is glued to the Front Cabinet

(pos. 2) must be forced open.

Caution: Do not break the bundle of wires to the front.

Dismantling the Rear Assembly1. Unscrew 10 screws A (see picture 3) to pull out the pc

board assembly. The assembly cannot be fully pulled out

until the connector plug from the rotary potmeter is

unplugged.

Caution: Do not break the bundle of wires to the front .

Hint: Simulate the action of the rotary potmeter with

2 resistors as potential divider between pins 1

to 3 of connector CN401 during servicing.

Dismantling the Subwoofer speaker1. Loosen the Speaker Grille (pos. 29) as shown in the

picture 2.

2. Unscrew 4 screws B (see picture 3) and disconnect the

speaker terminals to remove the Subwoofer speaker.

Picture 1

Picture 2

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3

Service Position

Picture 3

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WIRING DIAGRAM

4

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VR401

TP403

TP402

RB401

LD401

RB402

LVA0031C011

LVA0031C021

TP401

1

1

P40

1

VR

401

RB

401

LD40

1

94V

007

V0

T4A/250V

F901

FOR CONTINUED PROTECTION AGAINST RISKOF FIRE REPLACE WITH SAME TYPE FUSE

!

UT

ILIS

ER

U

N F

US

IBLE

D

E

RE

CH

AN

GE

DE

ME

ME

TY

PE

WARNING : AV

IS :

F902C913

J104D90

4

C90

4C

307

C30

6C

912

C91

0

C41

1C41

3 R41

1C40

3C

404 C

407

R90

2 C90

8C41

0C

509

C50

1J5

01IC

502

R41

0 R37

0R

371

R37

2

R36

6

R36

7

R36

9

C51

0

R52

0

R51

6

J502

R51

4

R37

3

J109

R527

C303

SW501

Q504

R53

2

R52

9

R53

1R

L501

D50

1 EA

ST

WA

YLV

A03

64-0

01Q50

1C

N50

1R

525

ZD

901

C91

1

SW301R302

JK301 C301

R30

3

RB

301

R30

1

Q505

C51

6

C52

0C

521

Q50

2

R52

8

07V

094

V0

SK

AB

CE

C90

9R

524

Q35

2R

526

C51

2

R53

0

C51

3

J506

C51

4

R51

9

R53

3

R51

8

C51

8C

519

J504

J505

R515

R522

R521

R523

D503 C52

2

C51

1

Q50

3R406

C414

C406

R403

C517

R404

R405

C412

C405

R407

J503 C907

J103

J106R368

R901

CN401

C90

6

R30

4

R40

1

CN301

IC401

1

C304

ZD902

C305

C401

C415R402

C40

2

C90

3

C90

2

C90

1

D90

3

D90

2

D90

1

C90

5C

N90

1

J105

T4A/250V

1

SK

1

G

C51

5

COMPONENT LAYOUT

5

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ELECTRICAL PARTS LIST

F901 482207034002 ! Fuse T4A 250V

F902 482207034002 ! Fuse T4A 250V

JK301 482226741238 RCA Jack 1P

RL501 996500009708 Relay GJ-SH-112DM 320 OHM

SW301 482227711821 Slide Switch

VR401 482210111919 Control Rotary 50kB

CAPACITORS

C301 482212233293 100pF 5% 50V

C303 482212421913 1µF 20% 63VC304 482212421913 1µF 20% 63VC305 482212421913 1µF 20% 63VC306 996500007093 0,22µF 5% 100VC307 996500007093 0,22µF 5% 100VC401 482212233293 100pF 5% 50V

C402 482212141935 12nF 5% 250V

C403 532212142662 68nF 5% 250V

C404 532212142662 68nF 5% 250V

C405 532212142489 33nF 5% 250V

C406 482212142077 6,8nF 10% 400V

C407 482212421913 1µF 20% 63VC410 482212423056 47µF 20% 16VC411 482212423056 47µF 20% 16VC412 482212230103 22nF 80% 63V

C413 482212230103 22nF 80% 63V

C414 996500003366 0,22µF +80/-20% 50VC415 996500003366 0,22µF +80/-20% 50VC501 482212422652 2,2µF 20% 50VC509 482212233293 100pF 5% 50V

C510 532212232331 1nF 10% 100V

C511 532212441945 22µF 20% 35VC512 532212441945 22µF 20% 35VC513 532212441945 22µF 20% 35VC514 482212440248 10µF 20% 63VC515 482212440248 10µF 20% 63VC516 532212142578 100nF 5% 250V

C517 996500007093 0,22µF 5% 100VC518 482212440207 100µF 20% 25VC519 482212440207 100µF 20% 25VC520 482212440248 10µF 20% 63VC521 482212440433 47µF 20% 25VC522 482212440433 47µF 20% 25VC901 482212230103 22nF 80% 63V

C902 482212230103 22nF 80% 63V

C903 482212230103 22nF 80% 63V

C904 482212230103 22nF 80% 63V

C905 482212442402 3300µF 20% 35VC906 482212442402 3300µF 20% 35VC907 203855400065 100nF +80/-20% 50V

C908 203855400065 100nF +80/-20% 50V

C909 482212440207 100µF 20% 25VC910 482212440207 100µF 20% 25VC911 203855400065 100nF +80/-20% 50V

C912 203855400065 100nF +80/-20% 50V

C913 203855400065 100nF +80/-20% 50V

RESISTORS

R301 482205021003 10k 1% 0,6W

R302 482205025602 5k6 1% 0,6W

R303 482205021003 10k 1% 0,6W

R304 482205026202 6k2 1% 0,6W

R366 482205021003 10k 1% 0,6W

R367 482205021001 100R 1% 0,6W

R368 482205021003 10k 1% 0,6W

R369 482205021502 1k5 1% 0,6W

R370 482205021502 1k5 1% 0,6W

R371 482205022203 22k 1% 0,6W

R372 482205025602 5k6 1% 0,6W

R373 482205022702 2k7 1% 0,6W

R401 482205021504 150k 1% 0,6W

R402 482205021003 10k 1% 0,6W

R403 482205024703 47k 1% 0,6W

R404 482205026803 68k 1% 0,6W

R405 482205021503 15k 1% 0,6W

R406 482205026803 68k 1% 0,6W

R407 482205022203 22k 1% 0,6W

R410 482205021001 100R 1% 0,6W

R411 482205021001 100R 1% 0,6W

R514 482205021003 10k 1% 0,6W

R515 482205023303 33k 1% 0,6W

R516 482205022203 22k 1% 0,6W

R518 482205025601 560R 1% 0,6W

R519 482205022203 22k 1% 0,6W

R520 482205022203 22k 1% 0,6W

R521 482205022203 22k 1% 0,6W

R522 482205021003 10k 1% 0,6W

R523 482205023303 33k 1% 0,6W

R524 482211681753 4R7 5% 0,5W

R525 482205023901 390R 1% 0,6W

R526 482205023302 3k3 1% 0,6W

R527 482205023304 330k 1% 0,6W

R528 482205021004 100k 1% 0,6W

R529 482205026803 68k 1% 0,6W

R530 482205023302 3k3 1% 0,6W

R531 482205023302 3k3 1% 0,6W

R532 482205021004 100k 1% 0,6W

R533 482205021003 10k 1% 0,6W

R901 482205023301 330R 1% 0,6W

R902 482205025601 560R 1% 0,6W

MISCELLANEOUS

6

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CIRCUIT DIAGRAM

7

DIODES

D501 482213031438 1N4001G

D503 482213030621 1N4148

D901 532213080686 1N5392

D901 482213031878 1N4003G

D902 532213080686 1N5392

D902 482213031878 1N4003G

D903 532213080686 1N5392

D903 482213031878 1N4003G

D904 532213080686 1N5392

D904 482213031878 1N4003G

LD401 482213010236 LED Green/Red

ZD901 482213034195 BZX79-B13

ZD902 482213034195 BZX79-B13

TRANSISTORS & INTEGRATED CIRCUITS

IC401 482220932742 TL074CN

IC502 482220916935 TDA7296

Q352 482213041198 2SC945P

ELECTRICAL PARTS LIST

Q501 482213041198 2SC945P

Q502 482213041198 2SC945P

Q503 482213041198 2SC945P

Q504 482213041198 2SC945P

Q505 482213041198 2SC945P

Note: Only the parts mentioned in this list are normal

service spare parts.

All resistors are 1/6W 5% unless otherwise specified.Note : All capacitors are in uF unless otherwise specified.

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8

EXPLODED VIEW

8

MECHANICAL PARTS LIST

1 9965 000 09709 Volume Knob

2 9965 000 09710 Front Cabinet

6 9965 000 07096 Port Edge

7 9965 000 03365 Cloth (185 X 185 mm)

11 9965 000 03360 Foot

27 3139 118 77230 ! Mains Cord UL

28 9965 000 07092 Bushing

29 4822 458 10658 Speaker Grille

30 9965 000 03361 Speaker Driver 40W 6,5" 4 ohm

31 4822 532 13065 Speaker Sponge

33 9965 000 03362 ! Power Transformer EI-66 120V 40W

9965 000 09734 RCA Cable L=3000mm

Note: Only the parts mentioned in this list are normal

service spare parts.

SCREW LIST

5 M3 x 8

9 M4 x 20

10 M3.5 x 14

16 M3 x 8

17 M3 x 14

25 M2 x 6

26 M3 x 10

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