Onkyo SKW-204(B), SKW-204(S), SKW-204(Y) Service Manual

SKW-204

SERVICE MANUAL

SERVICE MANUAL

POWERED SUBWOOFER

Black, Silver and Yellow models

MODEL SKW-204(B)/(S)/(Y)

Ref. No. 3946

052006

120V AC, 60Hz
230-240V AC, 50Hz
230-240V AC, 50Hz

B MDC
B MPP
S MPP

230-240V AC, 50Hz
120/220-240V AC, 50/60Hz
120/220-240V AC, 50/60Hz

S MPA
S MWT
Y MWT

SAFETY-RELATED COMPONENT
WARNING!!

COMPONENTS IDENTIFIED BY MARK ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO
PARTS WHOSE PART NUMBERS APPEAR AS SHOWN
IN THIS MANUAL.
MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.

SKW-204

EXPLODED VIEWS-1

AMPLIFIER SECTION

SKW-204

SP12

x 4 pcs.

A05a

x 2 pcs.

A05

x 4 pcs.

A08

x 2 pcs.

SP11

x 10 pcs.

A05

x 2 pcs.

A05

x 2 pcs.

A05

x 5 pcs.

A103

A103

A102

P901

SP13

x 2 pcs.

U03

A11

A01

U01

A07

A07

A101

A02

A02

U06

U05

U04

U02

A05

Q515

Q516

Q541

F901

T901

A04

A03

F901C

S901

A06

F902

Refer to "EXPLODED VIEWS-2"

<Note>

U04 (VOLTAGE SELECTOR PC BOARD) : MWT type only.

<Note>

F901C (LABEL) : MPP/MPA type only.
Part No. (SN) ---> Refer to
"PRINTED CIRCUIT BOARD PARTS LIST".

SKW-204

EXPLODED VIEWS-2

SPEAKER SECTION

SKW-204

SP07a / b

SP09a - c

SP01a - c

SP04

x 6 pcs.

SP02

x 4 pcs.

SP04

x 4 pcs.

SP03

x 4 pcs.

SP08

SP05a / b

SP06

SP11

x 2 pcs.

SCHEMATIC DIAGRAM

SKW-204

A

1

2

3

4

5

BCDEFGH

J317

FOR SKW-204AMP

J316

FOR SKW-540AMP

S101

Q302(1/2)
NJM4558LD

3

8

2

4

1

E801

Q302(2/2)
NJM4558LD

4

8

5

6

7

Q301(2/2)
NJM4558LD

4

8

5

6

7

Q301(1/2)
NJM4558LD

3

2

1

8

4

Q602
KRC103M

Q606

KRA103M

P301

R651

12K

(1/2W)

R951

3.3K

POWER NEED TO CONFIRM

(2W)

R952

3.3K

(2W)

0

-0.6

0

0.05

0.6

5.0

5.6

R609

39K

R611

820K

R610

560K

R616

100K

R617

1K

R621

1K

R615

22K

R612

39K

R614

120K

R613

470K

R619

22K

R620

100K

R624
100K

R623

100K

R627
680K

R622

10K

R626

2.2M
R625
180K

P632A

RED

GREEN

D601
MTZJ2.7B

D602

MTZJ2.7B

D501

MTZJ5.6B

D952

MTZJ15C

D951

MTZJ15C

Q507

2SA949-Y

Q505

2SA949-Y

Q509

2SA949-Y

Q604

2SA933S

Q605

2SA933S

Q607

2SA933S

Q506

2SC2229-Y

Q510

2SC2229-Y

Q503

2SC2240-BL

Q502
2SC2240-BL

Q501

2SC2240-BL

Q603

2SC1740S-S

Q608

2SC1740S-S

P501B

P633

P631

D651

1SS133

D603

1SS133

D605

1SS133

R302

20K

R101

20K

C301

C303

NC

C955

223J

C313

124

C312

334J

C506

070

C502

NC

C505

020

C503

224J

C950

104/50

C311

100/25

C302
47/50

C314
47/16

C527
1/50

C501

47/50

C504
220/16

C951
220/16

C952
220/16

C601

10/50

C603

470/16

C602

10/50

C604

33/35

R306

47K

R301

1K

R311

100K

R313

3.3K

R312

100K

R314

3.3K

R315

3.3K

R307

220*

R305

22K*

R303

47K

R304

2.2K*

R316
10K

R508

47

(1/4W)

R511

82

(1/4W)

R512

68

(1/4W)

R514

82

R513

82
(1/4W)

R516

12K

R515

12K

R502

47K

R510

100K

R505

1K

(1/4W)

R506

1K

(1/4W)

R507

33K

R527
270

R509

1K

R504

2.2K

R503

5.6K

R522
220

R521

220

R501

1K

R603

150K

R601

5.6K

R605

22

R602

100K

R604

180

FOR SKW-204AMP

NAAF-8830

PHASE SWITCH

OFF

ON

NAAF-8829

224

(PP/PA/WT)

NC

NC

NC

MAIN PC BOARD

U01

LINE INPUT

OUTPUT
LEVEL

LED

<Note>

NC : No mount of parts.