Panasonic SB-WA05E Manuale utente

ORDERNO. MD0402047C2

Active Subwoofer System

SB-WA05E / SB-WA05EB

Colour

(S)...Silver Type

SPECIFICATIONS

Specification

Activesubwoofer

Type 1way, 1speaker, Bass ref.

Speaker unit (Woofer) 17 cm conetype, 4

Input power (IEC) 220 W(Max)

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

Frequencyrange 32 Hz-220 Hz (-16 dB)

36 Hz-190 Hz (-10 dB)

Dimensions(WxH xD) 209 x361 x463 mm

Mass 11.5kg

General

Power supply AC 230-240V, 50 Hz

Power consumption 250 W

Power consumption instandby

mode 1W

Note:

Specificationsare subject tochangewithout notice.

Mass and dimensionsare approximate.

System : SC-HT05EB MusicCenter: SA-HT05EB

Satellitespeakers: SB-HT05P

ActiveSubwoofer: SB-WA05EB

System : SC-HT05EG MusicCenter: SA-HT05EG

Satellitespeakers: SB-HT05P

ActiveSubwoofer: SB-WA05E

System : SC-HT05EP MusicCenter: SA-HT05EP

Satellitespeakers: SB-HT05P

ActiveSubwoofer: SB-WA05E

System : SC-HT05EG1 MusicCenter: SA-HT05EG1

Satellitespeakers: SB-HT05P

ActiveSubwoofer: SB-WA05E

System : SC-HT05EP1 MusicCenter: SA-HT05EP1

Satellitespeakers: SB-HT05P

ActiveSubwoofer: SB-WA05E

System : SC-HT05EB1 MusicCenter: SA-HT05EB1

Satellitespeakers: SB-HT05P

ActiveSubwoofer: SB-WA05EB

SB-HT05P-S consistsof :

SB-PF725P-S x2, SB-FS725P-S x2and SB-PC725P-S x1

2004 PanasonicAVCNetworks Singapore Pte. Ltd. All rights

reserved. Unauthorized copying and distribution isaviolation of

law.

1. Safety Precautions

1.1. GENERALGUIDELINES

1. When servicing, observe the original lead dress. Ifashort circuit

isfound, replace all parts which have been overheated or

damaged bythe short circuit.

2. After servicing, see to itthat 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 CURRENTCOLD CHECK

1. Unplug the AC cord and connect ajumper between the two

prongs on the plug.

2. Measure the resistance value, with an ohmmeter, between the

jumpered AC plug and each exposed metalliccabinet part on the

equipment such as screwheads, connectors, control shafts, etc.

When the exposed metallicpart has areturn path to the chassis,

the reading shouldbe between 1M and 5.2 . / When the

exposed metal does not have areturn path to the chassis, the

reading must be . Fig. 1

1.1.2. LEAKAGE CURRENTHOTCHECK (See Figure1.)

1. Plug the AC cord directlyinto the AC outlet. Donot use an

isolation transformer for thischeck.

2. Connect a1.5k , 10 watts resistor, inparallel with a0.15 F

capacitors, between each exposed metallicpart on the set and a

good earth ground such as awater pipe, as showninFigure 1.

3. Use an AC voltmeter, with 1000 ohms/voltor more sensitivity, to

measure the potential across the resistor.

4. Check each exposed metallicpart, and measure the voltage at

each point.

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

measurements.

6. The potential at anypoint shouldnot exceed 0.75 volts RMS. A

leakage current tester (Simpson Model 229 or equivalent) maybe

used to make the hot checks, leakage current must not exceed 1/2

milliamp. Incase ameasurement isoutside of the limits specified,

there isapossibilityof ashock hazard, and the equipment should

be repaired and rechecked before itisreturned to the customer.

2. Handling the Lead-free Solder

2.1. About lead free solder (PbF)

Distinction of PbF P.C.B. :

P.C.B.s (manufactured) using leadfree solderwill have a PbF stampon the P.C.B.

Caution:

-Pb free solder has ahigher melting point that standard solder;

Typicallythe melting point is50 -70°F (30 -40°C)higher. / Please

use ahigh temperature soldering iron. Incase of the soldering

iron with temperature control, please set itto 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 completelyremove all of

the solder on the pins or solder area, and be sure to heat the

soldering points with the Pb free solder until itmelts enough.

3. Before Repair and Adjustment

Disconnect AC power, discharge PowerSupplyCapacitors C546, C547, C548, C549 through a

10 , 1 W resistortoground.

DO NOTSHORT-CIRCUITDIRECTLY (witha screwdriverblade, forinstance), as this may

destroysolidstate devices.

Afterrepairs are completed, restore powergraduallyusing a variac, toavoidovercurrent.

Current consumption at AC 230V, 50Hz inNO SIGNALmode shouldbe ~1000 mA.

4. Protection Circuitry

The protection circuitrymayhave operatedif eitherof the following conditions are noticed:

-Nosound isheard when the power isturned on.

-Sound stops during aperformance.

The function of this circuitryis toprevent circuitrydamage if, forexample, the positive and

negative speakerconnection wires are

“shorted”, orif speakersystems withanimpedance less thanthe indicatedratedimpedance of

the amplifierare used.

If this occurs, followthe procedure outlines below:

1. Turn off the power.

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

3. Turn on the power once againafter one minute.

Note :

Whenthe protection circuitryfunctions, the unit will not operate unless the poweris first turned

off and thenon again.

5. Connection of the Speaker Cables

-Besure to connect speaker cables before connecting the AC

power supplycord.

-The load impedance of anyspeaker used with thisunitmust be 4 .

-Besure to connect the cablefrom the right speaker to the right

terminal and the cablefrom the left speaker to the left terminal.

1. Stripoff the outer covering, and twist the center conductor. Make

sure the bare ends of the wires are not unravelled. (Iftheyare,

twist them tight again.)

2. Insert the wire to the rear panel of the unitand close the lever.

Notes :

-To prevent damage to circuitry, never short-circuitpositive (+)and

negative (-) speaker wires.

-Besure to connect onlypositive (red) wires to positive (+)

terminalsand negative (black) wires to negative (-) terminals.

6. Disassembly Procedure

“ATTENTION SERVICER”

Some chassis components mayhave sharpedges.

Be careful whendisassembling and servicing.

1. Thissection describes procedures for checking the operation of

the major printed circuitboards and replacing the main

components.

2. For reassemblyafter operation checks or replacement, reverse

the respective procedures.

Special reassemblyprocedures are described onlywhen required.

3. Select items from the following index when checks or

replacement are required.

Contents

-Disassemblyof the Speaker Unit

-MainComponent Replacement Procedures

6.1. Disassemblyflow chart

The following chart is the procedure fordisassembling the casing and inside parts forinternal

inspection whencarrying out the servicing.

To assemble the unit, reverse the steps showninthe chart below.

6.2. Disassemblyof the Speaker Unitand Checking of the P.C.B.s.

Step1: Remove all the screws.

Step2: Remove the stand base.

Step3: Remove all the screws fromthe bottomof the speakerunit.

Step4: Remove the screws fromthe rearpanel’s speakerunit guide.

Step5: Remove the screws fromthe subwoofer.

-Disassemblyof Power Amp unit.

Step6: Remove 2 screws fromthe PowerAmpunit.

Step7: Pull out the PowerAmpunit slightlyas shown.

(Note: Be careful of attachwire at CN506).

Step8: Release the connectorCN506 thenpull out the entire PowerAmpunit.

Steps 9 & 10: Remove all the screws.

Step11: Release the connectorCN507 toremove the rearpanel.

-Checking for the Power and AC Inlet P.C.B.

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