Panasonic SB-WA520EB Bedienungsanleitung

Table Of Contents

COVER

1 Safety Precautions

1.1 GENERAL GUIDELINES

1.1.1 LEAKAGE CURRENT COLD CHECK

1.1.2 LEAKAGE CURRENT HOT CHECK (See Figure 1.)

2 Handling the Lead-free Solder

2.1 About lead free solder (PbF)

3 Before Repair and Adjustment

4 Protection Circuitry

5 Connection of the Speaker Cables

6 Disassembly Procedure

6.1 Disassembly flow chart

6.2 Disassembly of the Speaker Unit and Checking of the P.C.B.s.

7 Connection of the Speaker Wiring

8 Block Diagram

9 Schematic Diagram

10 Printed Circuit Board

11 Wiring Connection Diagram

12 Illustration of IC ’ s, Transistors and Diodes

13 Parts Location and Replacement Parts List

13.1 Cabinet

13.1.1 Cabinet Parts Location

13.1.2 Cabinet Parts List

13.2 Electrical Parts List

13.3 Packing Materials & Accessories Parts List

13.4 Packaging

Service Manual

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ORDER NO. MD0402046C2

Active Subwoofer System

●SB-WA520EB

SB-WA520EG

Colour

(S)...Silver Type

Specification

Active subwoofer

Type 1 way, 1 speaker system (Bass reflex)

Woofer 17 cm cone type

Impedance 4Ω

Output sound pressure 80 dB/W (1.0 m)

Frequency range 32 Hz-220 Hz (-16 dB)

36 Hz-190 Hz (-10 dB)

Dimensions (W x H x D) 209 x 361 x 463 mm

Mass 11 kg

General

Power supply AC 230-240 V, 50 Hz (EB)

AC 230 V, 50 Hz (EG)

Power consumption 220 W

Power consumption in standby mode 0.7 W

Note :

Specifications are subject to change without notice.

Mass and dimensions are approximate.

System : SC-HT520EB Music Center: SA-HT520EB

Satellite speakers: SB-HT520P

Active Subwoofer: SB-WA520EB

System : SC-HT520E Music Center: SA-HT520E

Satellite speakers: SB-HT520P

Active Subwoofer: SB-WA520EG

System : SC-HT520EG Music Center: SA-HT520EG

Satellite speakers: SB-HT520P

Active Subwoofer: SB-WA520EG

SB-HT520P-S consists of :

SB-FS520P-S x 4 and SB-PC520P-S x 1

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1 Safety Precautions

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1.1 GENERAL GUIDELINES

1.1.1 LEAKAGE CURRENT COLD CHECK

1.1.2 LEAKAGE CURRENT HOT CHECK (See Figure 1.)

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1.1 GENERAL GUIDELINES

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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, see to it that all the protective devices such as insulation barriers, insulation

papers shields are properly installed.

3. After servicing, make the following leakage current checks to prevent the customer from

being exposed to shock hazards.

1.1.1 LEAKAGE CURRENT COLD CHECK

1.1.2 LEAKAGE CURRENT HOT CHECK (See Figure 1.)

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1.1.1 LEAKAGE CURRENT COLD CHECK

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1. Unplug the AC cord and connect a jumper between the two prongs on the plug.

2. Measure the resistance value, with an ohmmeter, 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 1MΩand 5.2Ω.

When the exposed metal does not have a return path to the chassis, the reading must be

Fig. 1

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1.1.2 LEAKAGE CURRENT HOT CHECK (See

Figure 1.)

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1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this

check.

2. Connect a 1.5kΩ, 10 watts resistor, in parallel with a 0.15μF capacitors, between each

exposed metallic part on the set and a good earth ground such as a water pipe, as shown in

Figure 1.

3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across

the resistor.

4. Check each exposed metallic part, and measure the voltage at each point.

5. Reverse the AC plug in the AC outlet and repeat each of the above measurements.

6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester

(Simpson Model 229 or equivalent) may be used to make the hot checks, leakage current must

not exceed 1/2 milliamp. In case a measurement is outsideof the limits specified, there is a

possibility of a shock hazard, and the equipment should be repaired and rechecked before it is

returned to the customer.

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2 Handling the Lead-free Solder

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2.1 About lead free solder (PbF)

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2.1 About lead free solder (PbF)

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Distinction of PbF P.C.B. :

P.C.B.s (manufactured) using lead free solder will have a PbF stamp on the P.C.B.

Caution:

●Pb free solder has a higher melting point that standard solder; Typically the melting point is 50

- 70°F (30 - 40°C) higher.

Please use a high temperature soldering iron. In case of the soldering iron with

temperaturecontrol, please set it to 700 ± 20°F (370 ± 10°C).

●Pb free solder will tend to splash when heated too high (about 1100°F/600°C).

●When soldering or unsoldering, please completely remove all of the solder on the pins or

solder area, and be sure to heat the soldering points with the Pb free solder until it melts

enough.

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