Onkyo SKW-50 Service manual
SKW-50
SKW 50
z
Ref. No . 3699
R
SERVICE MANUAL
POWERED SUBWOOFER
-
072001
120V AC,60H
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.
p
y
p
p
)
(
y)
g
)
p
p
)
(
)
)
(
)
(
)
y
SPECIFICATIONS
Type Bass-reflex with built-in power Speaker 20-cm woofer
lifier Power suppl
am
Use For su
re
Frequency response 30-200Hz 9-1/4" x 19-5/16" x 16-1/8"
Crossover frequency50-200Hz(variable
Maximam out
ut impedance 4.7kohm Pin connector cable(1pc.
In
Sensitivit
Speaker-level 2V
Line 45mV
ut power 60W
12kohm Instruction manual
erbass-range Power consumption 70W
roduction Dimensions(W x H x D)235 x 490 x 409(mm
at maximum crossover frequenc
for speaker-level input terminals
for low-level inputjacks
Weight 12.5k
Accessory
Other AUTO STANDBY ON/OFF
AC 120V,60Hz
27.6lbs
Spacers(4pcs.
with CANCELLING Switch
SKW-50
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
252253 2A-T/UL-ST2
252159 or 2A-UL/T237,Fuse or
P ANEL VIEW
Frequency adjusting knob Output level adjusting knob
POWERED SUBWOOFER
OUTPUT
FREQUENCY
50
Hz
200
Hz
LEVEL
MIN MAX
POWER
SKW-50
Power switch and indicator
Speaker-level input terminals
(MONO)
INPUT
L
R
LINE
INPUT
FROM
AMP/RECEIVER
OUTPUT
TO SPEAKERS
SPEAKER LEVEL
_L+_
R
+
_L+_
R+
Speaker-level output terminals
Low-level input jacks
Auto standby switch
To AC outlet
AUTO STANDBY
OFF ON
REAR PANEL CONNECTION
SKW-50
Connection with amplifier's
special subwoofer jack
AMP/RECEIVER
Preamplifier
Output terminals
L
R
SPEAKER LEVEL
_L+_
R
+
INPUT
FROM
AMP/RECEIVER
OUTPUT
TO SPEAKERS
_
_
R+
INPUT
OUTPUT
TO SPEAKERS
L+
FROM
SPEAKER LEVEL
_L+_
R
+
_
R+
LINE
INPUT
L
(MONO)
R
_
L+
AUTO STANDBY
OFF ON
LINE
AUTO STANDBY
INPUT
L
(MONO)
OFF ON
R
If your receiver(amplifier)is equipped with
a monaural subwoofer jack,connect it to the
SKW-50 Left (LINE INPUT)jack.
Connection with a preamplifier
INPUT
FROM
AMP/RECEIVER
OUTPUT
TO SPEAKERS
_
R+
SPEAKER LEVEL
_L+_
R
+
_L+_
R+
_
Connection with receiver's(amplifier's)
L+
speaker terminals
SKW-50
EXPRODED VIEW
B14
B28
A17
B14
B6
B25
A20
P901
A18
A15
A16
A13
A12
S
P
EA
K
IN
E
A
P
R
MP
U
L
/R
T
F
EV
R
E
O
C
E
M
E
I
L
V
E
R
O
T
U
O
T
S
P
P
E
U
A
T
K
E
R
S
L
IN
E
IN
PU
T
A
U
T
O
S
T
A
N
D
B
Y
L
(
MO
N
O
)
R
A6
O
F
F
O
N
Q952
Q951
U2
A3
A3
U3
A8
Q516
Q541
A1
A14
A23
U1
F901
U5
Q515
R602
T901
A19
B17
P535
B20
B19
U9
B8
U4
B27
A22
U8
A11
B16
U7
B24
B2
B18
B23
B3
B10
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
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
B24 70-015-414-01
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
105-㱢115 L=195,Paper duct
㱢
4*50,Self tapping screw
㱢
4*14,Self tapping screw
㱢
SKW-50
Loading...