SKW-50
Ref. No . 3699
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SERVICE MANUAL |
072001 |
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POWERED SUBWOOFER
MODEL SKW-50
MDD |
120V AC,60Hz |
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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 |
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amplifier |
Power supply |
AC 120V,60Hz |
Use |
For superbass-range |
Power consumption |
70W |
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reproduction |
Dimensions(W x H x D) 235 x 490 x 409(mm) |
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Frequency response |
30-200Hz |
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9-1/4" x 19-5/16" x 16-1/8" |
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(at maximum crossover frequency) |
Weight |
12.5kg |
Crossover frequency |
50-200Hz(variable) |
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27.6lbs |
Maximam output power 60W |
Accessory |
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Input impedance |
4.7kohm |
Pin connector cable(1pc.) |
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(for speaker-level input terminals) |
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Spacers(4pcs.) |
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12kohm |
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Instruction manual |
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(for low-level inputjacks) |
Other |
AUTO STANDBY ON/OFF |
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(with CANCELLING Switch) |
Sensitivity |
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Speaker-level |
2V |
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Line |
45mV |
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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 |
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252253 |
2A-T/UL-ST2 |
SKW-50
PANEL VIEW
Frequency adjusting knob |
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Output level adjusting knob |
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POWERED SUBWOOFER |
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FREQUENCY |
OUTPUT LEVEL |
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50Hz |
200Hz |
MIN |
MAX |
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POWER |
Power switch and indicator
Speaker-level input terminals
SPEAKER LEVEL |
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LINE |
AUTO STANDBY |
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INPUT |
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R |
L |
+ |
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INPUT |
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FROM |
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AMP/RECEIVER |
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L |
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(MONO) |
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OFF |
ON |
OUTPUT |
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R |
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TO SPEAKERS |
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+ |
R |
L |
+ |
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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 |
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LINE |
AUTO STANDBY |
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INPUT |
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+ |
R |
L |
+ |
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INPUT |
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FROM |
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AMP/RECEIVER |
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L |
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(MONO) |
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OFF |
ON |
OUTPUT |
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R |
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TO SPEAKERS |
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_ |
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+ |
R |
L |
+ |
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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
Preamplifier |
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Output terminals |
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L |
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R |
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SPEAKER LEVEL |
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LINE |
AUTO STANDBY |
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INPUT |
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R _ |
_ |
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+ |
L |
+ |
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INPUT |
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FROM |
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AMP/RECEIVER |
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L |
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(MONO) |
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OFF |
ON |
OUTPUT |
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R |
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TO SPEAKERS |
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R _ |
_ |
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+ |
L |
+ |
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+ R _ |
_ L + |
SPEAKER LEVEL
+ |
R |
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L |
+ |
INPUT |
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FROM |
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AMP/RECEIVER |
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OUTPUT |
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TO SPEAKERS |
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_ |
_ |
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+ |
R |
L |
+ |
Connection with receiver's(amplifier's) speaker terminals
SKW-50
EXPRODED VIEW |
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A13 |
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A12 |
A18 |
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A17 |
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A3 |
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SP |
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A |
INPUT |
EAKERL |
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MP/RECFRO |
EVEL |
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U3 |
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EIVEMR |
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ERS |
LINE |
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TO |
OUTPUTSPEAK |
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INPUT |
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AUTO |
STANDBY |
A6 |
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A8 |
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( L |
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R |
OFF |
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MONO) |
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Q952 |
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ON |
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U2 |
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Q951 |
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B25 |
A15 |
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A3 |
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Q516 |
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Q541 |
A20 |
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A1 |
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A14 |
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A23 |
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P901 |
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U1 |
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B14 |
A16 |
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Q515 |
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F901 |
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R602 |
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U5 |
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B28 |
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T901 |
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A19 |
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B14 |
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B17 |
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B6 |
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B19 |
B20 |
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U9 |
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B8 |
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U4 |
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B27 |
A22 |
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P535 |
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U8 |
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A11 |
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B16 |
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U7 |
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B24 |
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B2 |
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B18 |
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B23 |
B3
B10
PARTS LIST
EXPLODED VIEW
SKW-50
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 |
105115 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 |
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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 |
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2203062 or |
2SC5198-R,Transistor |
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2202524 or |
2SC4468-Y,Transistor |
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2202526 or |
2SC4468-P,Transistor |
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2202523 |
2SC4468-O,Transistor |
Q516 |
2203053 or |
2SA1941-O,Transistor |
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2203052 or |
2SA1941-R,Transistor |
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2202514 or |
2SA1695-Y,Transistor |
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2202516 or |
2SA1695-P,Transistor |
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2202513 |
2SA1695-O,Transistor |
Q541 |
2202104 or |
2SC3423-Y,Transistor |
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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 |
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