Panasonic SB-WA530EB Bedienungsanleitung

nActive subwoofer

Type 1 way, 2 speaker system, Bass

reflex

Speaker unit(s)

1. Woofer 13 cm Cone type, 4Ω

2. Woofer 13 cm Cone type, 4Ω

Output sound pressure level 80 dB/W (1.0 m)

Frequency range 40 Hz-220 Hz (-16 dB)

45 Hz-180 Hz (-10 dB)

Dimensions (W x H x D) 201.5 x 368.2 x 491.5 mm

Mass 11.3 kg

nGeneral

Power consumption 250 W

1 Safety Precautions 3

1.1. GENERAL GUIDELINES 3

2 Caution for AC Mains Lead 4

3 Handling the Lead-free Solder 5

3.1. About lead free solder (PbF) 5

rights reserved. Unauthorized copying and

distribution is a violation of law.

SB-WA530EB

Colour

(S)... Silver Type

Power supply AC 230-240V, 50Hz

Note :

Specifications are subject to change without notice.

Mass and dimensions are approximate.

nSystem : SC-HT530(EB) Music Center : SA-HT530(EB)

Satellite Speakers : SB-HT530(EB)

Active Subwoofer : SB-WA530(EB)

4 Before Repair and Adjustment 5

5 Protection Circuitry 5

6 Connection of the Speaker Cables 6

7 Disassembly Procedure 7

7.1. Disassembly flow chart 7

Active Subwoofer System

Specification

CONTENTS

Page Page

ORDER NO. MD0502044C2

7.2. Disassembly of the Speaker Unit and Checking of the

P.C.B. 8

8 Voltage Measurement and Waveform Chart 14

8.1. Voltage Measurement 14

8.2. Waveform 14

9 Block Diagram 15

10 Notes of Schematic Diagram 16

11 Schematic Diagram 17

11.1. Power Circuit 17

11.2. Transformer Circuit and AC Inlet Circuit 19

12 Printed Circuit Board 20

12.1. Power P.C.B. 20

12.2. AC Inlet P.C.B. and Transformer P.C.B. 22

13 Wiring Connection Diagram 23

14 Illustration of ICs, Transistors and Diodes 24

15 Parts Location and Replacement Parts List 25

15.1. Cabinet 26

15.2. Electrical Parts List 29

15.3. Packing Materials & Accessories Parts List 31

15.4. Packaging 31

SB-WA530EB

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.

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 1MΩand 5.2Ω.

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 1.5kΩ, 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. Should the measurement is outside of 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.

SB-WA530EB

2 Caution for AC Mains Lead

SB-WA530EB

3 Handling the Lead-free Solder

3.1. About lead free solder (PbF)

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 than 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 temperature control, 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.

4 Before Repair and Adjustment

Disconnect AC power, discharge Power Supply Capacitors C546~C549 through a 10 Ω, 1 W resistor to ground.

DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.

After repairs are completed, restore power gradually using a variac, to avoid overcurrent.

Current consumption at AC 230~240V, 50Hz in NO SIGNAL mode should be ~410 mA.

5 Protection Circuitry

The protection circuitry may have operated if either of the following conditions are noticed:

No sound is heard when the power is turned on.

Stops during a performance.

The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are

“shorted”, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.

If this occurs, follow the procedure outlines below:

1. Turn off the power.

2. Determine the cause of the problem and correct it.

3. Turn on the power once again after one minute.

Note:

When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.

SB-WA530EB

6 Connection of the Speaker Cables

Be sure to connect speaker cables before connecting the AC power supply cord.

The load impedance of any speaker used with this unit must be 4Ω.

Be sure to connect the cable from the right speaker to the right terminal and the cable from the left speaker to the left terminal.

1. Strip off the outer covering, and twist the center conductor. Make sure the bare ends of the wires are not unravelled. (If they are,

twist them tight again.)

2. Insert the wire to the rear panel of the unit and close the lever.

SB-WA530EB

Some chassis components may have sharp edges.

Be careful when disassembling and servicing.

7 Disassembly Procedure

“ATTENTION SERVICER”

1. This section describes procedures for checking the operation of the major printed circuit boards and replacing the

main components.

2. For reassembly after operation checks or replacement, reverse the respective procedures.

Special reassembly procedures are described only when required.

3. Select items from the following index when checks or replacement are required.

7.1. Disassembly flow chart

The following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the

servicing.

To assemble the unit, reverse the steps shown in the chart below.

7.1.1. Disassembly of Front Panel Assembly

7.1.2. Disassembly of Rear Assembly

SB-WA530EB

7.2.1. Disassembly of the Front Panel

Unit

Step 1: Slot in a steel ruler to give a gap between the Front

Panel Unit and the Subwoofer Cabinet Assembly as arrow

shown.

Steps 2: Slot a piece of wood chip in between the Front Panel

Unit and the steel ruler as arrow shown.

Step 3: Use the screwdriver to slightly lift up the Front Panel

Unit as arrow shown.

Note:

Be careful with the bosses which are glued to the Subwoofer

Cabinet Assembly.

Step 4: Remove the Front Panel Unit from the Subwoofer

Cabinet Assembly.

7.2. Disassembly of the Speaker Unit and Checking of the P.C.B.

SB-WA530EB

Assembly of the Front Panel Unit.

Step 1: Clean up all the glue at the 6 Boss points and

replace with the normal glue.

Step 2: Replace the Front Panel Unit firmly back to the

cabinet.

7.2.2. Disassembly of the Woofer

Speaker 1

Follow Step (1) to Step (4) described in section 7.2.1.

Step 1: Remove 4 screws from the Woofer 1.

Step 2: Remove the Woofer 1 by detaching the (+) and (-)

wires.

7.2.3. Disassembly of the Woofer

Speaker 2

Follow Step (1) to Step (4) described in section 7.2.1.

SB-WA530EB

Step 1: Remove 4 screws from the Woofer 2.

Step 2: Remove the Woofer 2 by detaching the (+) and (-)

wires.

7.2.4. Disassembly of the Power Amp

Unit

Step 1: Lay the speaker unit as shown. Remove 6 screws from

the bottom of the woofer unit.

Step 2: Remove 3 screws from the rear panel.

SB-WA530EB

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