Panasonic SB-W740 User manual

ORDERNO. MD0512499C7
A6
SubwooferSystem
SB-W740P
Colour
(S)... SilverType
SPECIFICATIONS

Specification
Type 1way, 1speaker system (Bass-ref.)
Speaker unit Impedance 4
Woofer 16 cm (6-1/2”) Conetype
Inputpower (IEC) 320 W*(Max)
Outputsound pressure
level 80 dB/W(1.0m)
Frequencyrange 32 Hz-220 Hz(-16 dB)
38 Hz-180 Hz(-10 dB)
Dimensions(WxHxD) 183 mm x396 mm x267 mm
7-7/32”x15-19/32”x10-1/2”
Mass 4 kg (8.8lbs.)
Notes :
1. Specificationsaresubject to changewithout notice. / Mass and
dimensionsareapproximate.
2. Total harmonicdistortion ismeasuredbythe digital spectrum
analyzer.
System :SC-
HT740GCPS
MusicCenter :SA-HT740GCPS
FrontSpeaker :SB-FS740P-S
Surround Speaker :SB-FS741P-S
Center Speaker :SB-PC740P-S
Subwoofer :SB-W740P-S
System :SC-HT740P-S MusicCenter :SA-HT740P-S
FrontSpeaker :SB-FS740P-S
Surround Speaker :SB-FS741P-S
Center Speaker :SB-PC740P-S
Subwoofer :SB-W740P-S
System :SC-HT740PC-
S
MusicCenter :SA-HT740PC-S
FrontSpeaker :SB-FS740P-S
Surround Speaker :SB-FS741P-S
Center Speaker :SB-PC740P-S
Subwoofer :SB-W740P-S
System :SC-HT740PX-
S
MusicCenter :SA-HT740PX-S
FrontSpeaker :SB-FS740P-S
Surround Speaker :SB-FS741P-S
Center Speaker :SB-PC740P-S
Subwoofer :SB-W740P-S

2005 Matsushita ElectricIndustrial Co. Ltd.. All rights reserved.
Unauthorizedcopying and distribution isaviolation oflaw.
1. Assembling and Disassembling
“ATTENTION SERVICER”
Some chassis components mayhave sharpedges. Be careful whendisassembling and
servicing.
1. Thissection describes procedures for checking theoperation of
themajor printedcircuitboardsand replacing themain
components.
2. For reassemblyafteroperation checks or replacement, reverse
therespectiveprocedures.
Special reassemblyprocedures aredescribedonlywhenrequired.
3. Select itemsfrom thefollowing index whenchecks or
replacementarerequired.
4. RefertotheParts No. on thepageof“Parts Location and
ReplacementParts List”(Section 5), ifnecessary.

Belowis the listof disassemblysections
-DisassemblyofFrontCabinet Assembly
-DisassemblyofWoofer
-DisassemblyofSpeakerCabinet Assembly
1.1. Disassemblyflowchart
The following chartis the procedure fordisassembling the casing and inside parts forinternal
inspection whencarrying out the servicing.
Toassemble the unit, reverse the steps showninthe chartas below.
1.2. DisassemblyofFrontCabinet Assembly

Step1:Upsetthe unitas shownabove.
Step2:Inserta steel rule into the grooves of the Speakerunit. Pushthe steel rule forwardand
backwardas arrowshown.
Step3:Inserta flatheadscrewdriverinto the grooves as arrowshown. Ensure thatthe
screwdriveris above the Steel rule.
Step4:Use the screwdriverto slightlypushup the Front CabinetAssemblyas arrowshown

and insertthe Wood chip.
Step5:Atthe boss area pushup as arrowshownto openthe boss.
Caution:
Donot exertstrong force as itmaydamage the Front CabinetAssembly.
1.3. DisassemblyofWoofer
Follow(step1)to (step5)of item1.2.
Step1:Remove all 4 screws from the Woofer.

Step2:Inserta steel rule betweenthe Wooferand SpeakerCabinetAssemblyto pushout the
Woofer.
Step3:Take out the Wooferunit.

Step4:Remove the Wooferbydetaching the (+)white and (-) blue wires.
1.4. AssemblyofSubwooferUnit
Step1:Scrape off using the scriberand cleanup the remaining glue atthe 6 bosses and 6 holes
as arrowshownand replace with the normal glue.
Step2:Fix the Front CabinetAssemblyfirmlyback to the SpeakerCabinetAssembly.
2. Connection ofthe Speaker Cables
-Besuretoconnect speakercables beforeconnecting theAC

powersupplycord.
-Theloadimpedance ofanyspeakerusedwiththisunitmust be4
.
-Besuretoconnect thecablefrom therightspeakertotheright
terminal and thecablefrom theleft speakertotheleft terminal.
1. Stripoff theoutercovering, and twist thecenterconductor. Make
surethebareendsofthewires arenotunravelled. (Iftheyare,
twist themtightagain.)
2. Insertthewiretotherearpanel oftheunitand close thelever.
Notes :
-Topreventdamagetocircuitry, nevershort-circuitpositive(+) and
negative(-) speakerwires.
-Besuretoconnect onlypositive(white) wires topositive(+)
terminalsand negative(blue) wires tonegative(-) terminals.
Incorrect connection candamagethespeakers.
Positioning the speakers
Howyou setup yourspeakers canaffectthe bass and the sound field.
Note the following points:
-Place thespeakerson flat securebases.
-Placing speakerstoo close tofloors, walls, and cornerscanresult
inexcessivebass. Coverwallsand windowswithathick curtains.
-Left and rightspeakersareinterchangeable, butfrontand
surround speakersarenot.
Setup example
Place the front, centerand surround speakers atapproximatelythe same distance from the

seating position.
The angles inthe diagramare approximate.
Usedonlysuppliedspeakers
-Using otherspeakerscandamagetheunit, and sound qualitywill
benegativelyaffected.
-Set thespeakersup on anevensurface topreventthemfrom
falling.
Take careproperprecautionstopreventthespeakersfrom falling
ifyou cannotsee themup on anevensurface.
Mainunit
Note
-Keepyour speakersat least 10 mm (13/32”)awayfrom thesystem
for properventilation.
-Toallowfor properventilation and tomaintaingood airflowaround
themainunit, position itwithat least 5cm(2”)ofspace on all
sides.
-Donotblock theventilation holes ofthemainunit.
Centerspeaker
-Vibration causedbythecenterspeakercandisruptthepictureifit
isplaceddirectlyon thetelevision. Putthecenterspeakeron a
rack or shelf.
-Topreventthespeakersfrom falling, do notplace directlyon top
ofthetelevision.
Subwoofer