Service Manuals, User Guides, Schematic Diagrams or docs for : ONKYO Audio SKW50 Onkyo-SKW50 actsub
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SKW-50
Ref. No . 3699
R SERVICE MANUAL 072001
POWERED SUBWOOFER
MODEL SKW 50
SKW-50
MDD 120V AC,60Hz
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 NUMBER 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-50
SPECIFICATIONS
Type Bass-reflex with built-in power Speaker 20-cm woofer
amplifier Power supply AC 120V,60Hz
Use For superbass-range Power consumption 70W
reproduction Dimensions(W x H x D) 235 x 490 x 409(mm)
Frequency response 30-200Hz 9-1/4" x 19-5/16" x 16-1/8"
(at maximum crossover frequency) Weight 12.5kg
Crossover frequency 50-200Hz(variable) 27.6lbs
Maximam output power 60W
Input impedance 4.7kohm Accessory Pin connector cable(1pc.)
(for speaker-level input terminals) Spacers(4pcs.)
12kohm Instruction manual
(for low-level inputjacks) Other AUTO STANDBY ON/OFF
(with CANCELLING Switch)
Sensitivity
Speaker-level 2V
Line 45mV
SERVICE PROCEDURES
1. Replacing the fuse
This symbol located near the fuses indicates that the
fuse used is fast operating type. For continued protection against
fire hazard, replace with same type fuse. For fuse rating refer to
the marking adjacent to the symbol.
Ce symbole indique que le fusible utlise est a rapide.
Pour une protection permanente, n'untiliser que fusibles de
meme type. Ce darnier est la qu le present symbol est
appse.
CIRCUIT NO. PART NO. DESCRIPTION
F901 252159 or 2A-UL/T237,Fuse or
252253 2A-T/UL-ST2
SKW-50
PANEL VIEW
Frequency adjusting knob Output level adjusting knob
POWERED SUBWOOFER
FREQUENCY OUTPUT LEVEL
50 Hz 200 Hz MIN MAX
POWER
Power switch and indicator
Speaker-level input terminals
SPEAKER LEVEL LINE AUTO STANDBY
INPUT
+ R _ _ L +
INPUT
FROM
AMP/RECEIVER
L
(MONO)
OFF ON
OUTPUT R
TO SPEAKERS
+ R _ _ L +
Speaker-level output terminals
Low-level input jacks
Auto standby switch
To AC outlet
SKW-50
REAR PANEL CONNECTION
Connection with amplifier's
special subwoofer jack
SPEAKER LEVEL LINE AUTO STANDBY
INPUT
+ R _ _ L +
INPUT
FROM
AMP/RECEIVER
L
(MONO)
OFF ON
If your receiver(amplifier)is equipped with
OUTPUT
TO SPEAKERS
+ R _ _ L +
R
a monaural subwoofer jack,connect it to the
SKW-50 Left (LINE INPUT)jack.
Connection with a preamplifier
Preamplifier
Output terminals
L
R
SPEAKER LEVEL LINE AUTO STANDBY
INPUT
+ R _ _ L +
INPUT
FROM
AMP/RECEIVER
L
(MONO)
OFF ON
OUTPUT R
TO SPEAKERS
+ R _ _ L +
Connection with receiver's(amplifier's)
+ R _ _ L +
speaker terminals
SPEAKER LEVEL
+ R _ _ L +
INPUT
FROM
AMP/RECEIVER
OUTPUT
TO SPEAKERS
+ R _ _ L +
SKW-50
EXPRODED VIEW A13
A12
A18
A17
A3
SP
EA
INPU KE
AM R LE
P/R FR
EC OM T VE
EIV L
U3
ER
TO OU
SP TP
EA
KE
UT
RS
LIN
INPUE
T
AU
TO
STA
A6
ND
BY
L
A8
(MO
NO
)
Q952
R
OF
F
ON
U2
Q951 A3
B25 A15
Q516
Q541
A1
A20
A23
P901 A14
B14 U1 Q515
A16
F901
R602
U5
T901
B28
A19
B17
B14
B6
B19 B20
U9
B8 U4
B27 A22
U8
P535
A11
B16
U7
B24
B2
B18
B23
B3
B10
SKW-50
PARTS LIST
EXPLODED VIEW REF NO. PART NO. DESCRIPTION
A1 27160467 Heat sink
A3 27130745 Bracket
A6 27141661 Retainer
A8 28184777 Cover
A11 29-100-076-21 Cushion
A12 28141475 t2X5X160,Cushion
A13 28141476 t2X5X80,Cushion
A14 27122895A Rear panel
A16 830440109 4TTC+10C(BC),Self tapping screw
A17 28141473 t2X5X415,Cushion
A18 28141474 t2X5X195,Cushion
A19 28141334 Cushion
A20 27301941 Cord,bushing
A22 260208 Binder
A23 223021 TBM-51W 9043,Isolation sheet
B2 W20170A Speaker ass'y
B3 AZ200003-01 Cabinet ass'y
B7 31-000-038-61 105- 115 L=195,Paper duct
B8 29-100-076-11 Cushion
B9 51-000-119-01 Box ass'y
B10 AZ000084-01 Base ass'y
B14 54-000-122-01 VHZ 30t*150*150,Sound absorbent
B16 58-000-301-01 Cover
B17 57-000-581-01 Panel
B18 58-000-302-01 Foot
B19 58-000-303-01 Knob(A)
B20 58-000-304-01 Knob(B)
B23 70-015-450-01 4*50,Self tapping screw
B24 70-015-414-01 4*14,Self tapping screw
B27 71-079-800-03 Nuts
F901 252159 or 2A-UL/T-237,Fuse
252253 2A-T/UL-ST2,Fuse
P535 2009990611UL NSAS-2P0833,Socket
P901 253272HIT AS-UC-6#18,Power supply cord
Q515 2203063 or 2SC5198-O,Transistor
2203062 or 2SC5198-R,Transistor
2202524 or 2SC4468-Y,Transistor
2202526 or 2SC4468-P,Transistor
2202523 2SC4468-O,Transistor
Q516 2203053 or 2SA1941-O,Transistor
2203052 or 2SA1941-R,Transistor
2202514 or 2SA1695-Y,Transistor
2202516 or 2SA1695-P,Transistor
2202513 2SA1695-O,Transistor
Q541 2202104 or 2SC3423-Y,Transistor
2202103 2SC3423-O,Transistor
Q951 2202754 2SD1266-P,Transistor
Q952 2202764 2SB941-P,Transistor
R602 4000144 PTH9M04-2.2K,Thermistor
T901 2301487 NPT-1396D,Power transformer
U1 1W204565-2D NAAF-6865-2D,Main PC board ass'y
U2 1W204566-2D NAAF-6866-2D,Input/Output PC board ass'y
U3 1W204567-2D NAAF-6867-2D,OP amplifier PC board ass'y
U4 1W204568-2D NAAF-6868-2D,Power supply PC board ass'y
U5 1W204569-2D NAAF-6869-2D,Power transformer PC board ass'y
U7 1W204571-2D NAAF-6871-2D,Volume PC board ass'y
U8 1W204572-2D NAAF-6872-2D,PC board for holder
U9 1W204573-2D NAAF-6873-2D,Standby LED PC board ass'y
B25 70-015-420-02 4 x 20,Self tapping screw
SKW-50
BLOCK DIAGRAM
SPEAKER
NAAF-6866-2 NAETC-6870-2
INPUT/OUTPUT
CUTOFF FREQUENCY
VOLUME
-19dB
-6dB
SPEAKER
R321
5OHM
LEVEL
BAL 4.7K +21dB +28dB
R319
4.7K
Q301 Q302
R328
(2/2)
LPF LPF
Q303 POWERAMP
12DB/OCT 12DB/OCT
50-200HZ 50-200HZ
NAETC-6867-2
RCA IN
+9.5dB
Q302
(1/2)
C366
AUTO_STANDBY THERMAL
MUTE
ON/OFF PROTECTION
CIRCUIT AUTO_ CIRCUIT CIRCUIT
STANDBY
CANCEL SW
NAAF-6866-2
NAAF-6865-2
+5.6V D931
NASW-6868-2
C931
1
D933
D932
Q951
+14.4V
O G I
1 T901
Q952 POWER TRANS
-14.4V
O G I
1 MDD AC120V
D911
+B D_ARRAY
1 AC IN
C911
GND
1
C912
NAPS-6869-2
-B
1
SKW-50
SCHEMATIC DIAGRAM U2 Input/Output PC board
R318 NAAF-6866-2
NAETC-6870-2
U7 Volume PC board
18K
20KA
R328
(2/2)
C306
C305 R323
R328
LEVEL
(1/2)
INPUT R 3 0 54 7 / 1 6 101 22K
2 R319 C320 R322 4
12K Q302 M5218
1 4.7K 22K 6 P304B
47/16 Q302
R306 3 7
P301
M5218
R326 5 8
12K
100K
C366 R324 470 P304A
U3 OP amplifer PC board
220/16
C955
0 R346
R317
223Z
5.6K
C315
102K
R307 R301 C301 R327
220/16
C956
100K 5
100 100K
R311
4.7K
47/16 C340 R355
SP LEVEL C322 7
0.1 Q303
C302
JL303A
R309 R303 47/16 6 2.2K
JL303B
INPUT/OUTPUT
100 100K M5218
C339
R313
C317
102K
R329
2.2K
47/16
47K
0.1
R331
R349
10K
47K
LCH
R314
C318
102K
8M 5 2 1 8
2.2K
P302
5
7 R330
R310 R304 Q301
6 1K 3 8
100 100K
R312
4.7K
4 1
Q303
R308 R302 5.6K 2
RCH
100 100K R315
C316
102K
4
R316
R336 M5218
10K 0
M5218
3
1 R321
Q301
2 4.7K
A U T O P O W E R C A N C E LS W
R320
1K
10K
R371
P501
R372
8.2K
R505 R506
R511
Q509
S301
1K 1K 82
(1/4W) (1/4W) (1/4W) 2SA949-Y
37.9V
JL953B
Q505
2SA949-Y
U1 Main PC board 37.9V
JL953A
NAAF-6865-2
Q501 Q502
2SC1775 2SC1775
Q951 R951
C501 R501 0 C505
14.4 2SD1266 37.6 47 (1/4W)
220/6.3 1K 020
220/16
15.0 -0.6
C953
C502 R502 C503 R507
R515
151 33K 151
R953 33K 12K
6.8K(1/2W) R521 R522
220/16
C951
220 220 Q507
2SA949-Y
D951 R516
MTZJ15C R509 12K
R503 0
330
5.6K 2SC2229-Y
R615
12K -37.8V R508 -37.9V
Q503
220/16
D952 (1/2W) 47
C952
R527
MTZJ15C (1/4W) Q510
Q504 1K
R954 2SC2240
220/16
-15.0 C527 -38.4V
C954
6.8K(1/2W) R510 Q506
47/50 22K 2SC2229-Y
2SC2240 C504
R
R504 R512
-14.4 -37.6 470/6.3
D615 270 82
R952 1SS133 (1/4W) (1
Q952
2SB941 47(1/4W)
5.6 Q604
5.4
DTA124ES
C621
10/50 Q606 5.6
2SA933S-S 4.9 Q603 R60
P604
R621 8 100
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