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SERVICE MANUAL
POWERED SUB WOOFER
SP-DWF10
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Area suffix |
J ---------------------------- |
U.S.A. |
A ------------------------ |
Australia |
E ---------- |
Continental Europe |
US ------------------------ |
Singapore |
UF ------------------------------ |
China |
UP ----------------------------- |
Korea |
UT ---------------------------- |
Taiwan |
UX -------------------- |
Saudi Arabia |
UJ ---------------------- |
U.S.Military |
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|
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
COPYRIGHT © 2004 Victor Company of Japan, Limited
No.MB251
2004/6
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SPECIFICATION |
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Type |
Powered Subwoofer Bass-reflex type (magnetically shielded type) |
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Speaker |
16.0 cm cone × 1 (6-5/16") |
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Frequency Range |
32 Hz 200 Hz |
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Impedance |
4 Ω |
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Input terminals |
INPUT (LOW-LEVEL) |
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Power requirements |
AC 120 V , 60 Hz |
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Output power of built-in amp |
100 W (45 Hz, 4 Ω , 10 % THD) |
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Power Handling Capacity |
25 W |
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Dimensions (W × H × D) |
185 mm × 374 mm × 345 mm (7-5/16" × 14-3/4" × 13-5/8") |
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Mass |
8.86 kg (19.6 lbs) |
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Design and specifications are subject to change without notice.
1-2 (No.MB251)
SECTION 1 PRECAUTION
1.1Safety Precautions
(1)This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.
(2)Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturers warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.
(3)Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( 
) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards.
(4)The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after reassembling.
(5)Leakage shock hazard testing
After reassembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.Do not use a line isolation transformer during this check.
•Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).
•Alternate check method
Plug the AC line cord directly into the AC outlet. Use an
AC voltmeter having, 1,000Ω per volt or more sensitivity in the following manner. Connect a 1,500Ω 10W resistor paralleled by a 0.15µF AC-type capacitor between an exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).
AC VOLTMETER (Having 1000 ohms/volts,
or more sensitivity)
0.15
F AC TYPE
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Place this |
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probe on |
1500 10W |
each exposed |
metal part. |
Good earth ground
1.2Warning
(1)This equipment has been designed and manufactured to meet international safety standards.
(2)It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
(3)Repairs must be made in accordance with the relevant safety standards.
(4)It is essential that safety critical components are replaced by approved parts.
(5)If mains voltage selector is provided, check setting for local voltage.
1.3Caution
Burrs formed during molding may be left over on some parts of the chassis.
Therefore, pay attention to such burrs in the case of preforming repair of this system.
1.4Critical parts for safety
In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( 
), diode ( 
) and ICP ( 
) or identified by the " 
" mark nearby are critical for safety. When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)
(No.MB251)1-3
1.5Importance administering point on the safety
Power switch board
F9001 |
Caution: For continued protection against risk of fire, replace only with same type 3 A/125 V for F901. This symbol specifies the type of fast operating fuse.
Precaution: Pour la protection continue contre les risques d'incendie, remplacer uniquement par le meme type: fusible 3 A/125 V pour les F901.
^
Ce symbole specifie le type de fusible a action rapide.
1-4 (No.MB251)
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