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ORDER NO. MD0411542C1
A6
Active Subwoofer System
SB-WA730PP
Colour
(S)...Silver Type
Specification
n Active subwoofer
Type 1 way, 2 speaker system, Bass reflex Note :
Speaker unit(s) Specifications are subject to change without notice.
1. Woofer 13 cm (5-1/8") Cone type, 4 Mass and dimensions are approximate.
2. Woofer 13 cm (5-1/8") Cone type, 4
Output sound pressure level 80 dB/W (1.0 m) SB-HT730P-S consists of :
Frequency range 40 Hz-220 Hz (-16 dB) SB-FS730P-S X 2, SB-FS731P-S x 2 and SB-PC730P-S x 1
45 Hz-180 Hz (-10 dB)
Dimensions (W x H x D) 201.5 x 368.2 x 491.5 mm n System : SC-HT730P-S Music Center: SA-HT730P-S
(7-15/16" x 14-1/2" x 19-3/8") Satellite Speakers: SB-HT730P-S
Mass 11.3 kg (24.9 lbs) Active Subwoofer: SB-WA730PP-S
n General n System : SC-HT730PC-S Music Center: SA-HT730PC-S
Power consumption 340 W Satellite Speakers: SB-HT730P-S
Power supply AC 120V, 60Hz Active Subwoofer: SB-WA730PP-S
CONTENTS
Page Page
1 Safety Precautions 3 3 Before Repair and Adjustment 5
1.1. GENERAL GUIDELINES 3 4 Protection Circuitry 5
2 Handling the Lead-free Solder 5 5 Connection of the Speaker Cables 6
2.1. About lead free solder (PbF) 5 6 Disassembly Procedure 7
SB-WA730PP
6.1. Disassembly flow chart 7 11 Printed Circuit Board 22
6.2. Disassembly of the Speaker Unit and Checking of the 11.1. Power P.C.B. 22
P.C.B. 9 11.2. AC Inlet P.C.B. and Transformer P.C.B. 24
7 Voltage Measurement and Waveform Chart 15 12 Wiring Connection Diagram 25
7.1. Voltage Measurement 15 13 Illustration of IC , Transistors and Diodes 26
7.2. Waveform 16 14 Parts Location and Replacement Parts List 27
8 Block Diagram 17 14.1. Cabinet 28
9 Notes of Schematic Diagram 18 14.2. Electrical Parts List 31
10 Schematic Diagram 19 14.3. Packing Materials & Accessories Parts List 33
10.1. Power Circuit 19 14.4. Packaging 33
10.2. Transformer Circuit and AC Inlet Circuit 21
2
SB-WA730PP
1 Safety Precautions
1.1. GENERAL GUIDELINES
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.
2. After servicing, ensure that all the protective devices such as insulation barriers, insulation papers shields are properly installed.
3. After servicing, check for leakage current to prevent from being exposed to shock hazards.
(This "Safety Precaution" is applied only in U.S.A.)
1. Before servicing, unplug the power cord to prevent an electric shock.
2. When replacing parts, use only manufacturer's recommended components for safety.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
5. Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to prevent the
customer from being exposed to a shock hazard.
1.1.1. LEAKAGE CURRENT COLD CHECK
1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
2. Using an ohmmeter measure the resistance value, between the jumpered AC plug and each exposed metallic cabinet part on
the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the
chassis, the reading should be between 1M and 5.2.
When the exposed metal does not have a return path to the chassis, the reading must be .
Fig. 1
1.1.2. LEAKAGE CURRENT HOT CHECK (See Figure 1.)
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a 1.5k, 10 watts resistor, in parallel with a 0.15