Panasonic SAHT280 - RECEIVER User manual

ORDERNo.MD0004059C1
A1
AVControl StereoReceiver
SA-HT280
Colours
(K)...........Black Type
(S)...........SilverType
Areas
PP...........U.S.A. and Canada
System:SC-HT280
SPECIFICATIONS
Specification

AMPLIFIERSECTION
Rated minimumsinewaveRMSpoweroutput
20Hz-20kHzboth channelsdriven / 0.05%total harmonic
distortion
100W perchannel (8 )
1kHzcontinuouspoweroutputboth channelsdriven
0.05%total harmonicdistortion
105W perchannel (8 )
Total harmonicdistortion
rated powerat20Hz-20kHz 0.05%(8 )
halfpowerat1kHz 0.03%(8 )
Poweroutputat1kHzeach channel driven
0.9%total harmonicdistortion
Front/ Center/ Surround /
Sub woofer(100Hz) 2x100W (8 )/ 100W (8
)/ 2x100W (8 )/ 100W
(8 )
Lowfrequencydamping factor 30 (8 )
Load impedance
Front
AorB/ Aand B 4-8 / 8
Center/ Surround / Sub woofer 8 / 8 / 8
Dynamicheadroom 2dB(8 )
Frequencyresponse
PHONO RIAA standard curve±
0.8dB
CD, TAPE, DVD, TV, VCR 10Hz-70kHz, ±3dB
Inputsensitivity
PHONO 0.4mV(3mV, IHF ’66)
CD, TAPE, DVD, TV, VCR 27mV(200mV, IHF ’66)
S/N(IHF A)
PHONO/ CD, TAPE, DVD, TV,
VCR 70dB(80dB, IHF ’66)/ 75dB (85dB, IHF ’66)
Inputimpedance
PHONO/ CD, TAPE, DVD, TV,
VCR 47k / 22k
Tonecontrols
BASS / TREBLE 50Hz, +10 to -10dB/ 20kHz,
+10 to -10dB
Subwooferfrequencyresponse / (-
6dB) 7-200Hz
Digital input
Optical CD, DVD, TV
FMTUNERSECTION
Frequencyrange 87.9-107.9MHz
Sensitivity 11.2dBf(2 V, IHF ’58)
50 dBquieting sensitivity
MONO 18.3dBf(4.5 V, IHF ’58)
STEREO 38.3dBf(45 V, IHF ’58)

Total harmonicdistortion
MONO/ STEREO 0.2%/ 0.3%
S/N
MONO/ STEREO 73dB/ 67dB
Frequencyresponse 20Hz-15kHz, +1dB, -2dB
Alternatechannel selectivity 65dB
Captureratio 1.5dB
Imagerejection at98MHz 40dB
Spuriousresponse rejection at
98MHz 75dB
AMsuppression 50dB
Stereo separation
1kHz/ 10kHz 40dB/ 30dB
Antennaterminal 75 (unbalanced)
AMTUNERSECTION
Frequencyrange/ Sensitivity/
Selectivity/ IF rejection at1000kHz 530 -1710kHz/ 20 V,
330 V/m/ 55dB/ 50dB
VIDEOSECTION
Outputvoltageat1Vinput 1±0.1Vp-p
(unbalanced)
Maximuminputvoltage/ Input/
outputimpedance 1.5Vp-p / 75
GENERAL
Powersupply/ Powerconsumption
/ Dimensions(W xHxD) AC120V, 60Hz/ 450VA, 350W / 430 x158 x320.5mm
/ (16-15/16”x6-7/32”x12-5/
8”)
Mass 10.2kg (22.4lb.)
Powerconsumption in standby/
mode: 1W
Notes:
1. Specificationsaresubjectto changewithout notice. / Mass and
dimensionsareapproximate.
2. Total harmonicdistortion ismeasuredbythedigital spectrum /
analyzer.
*
1Manufactured underlicense fromDolbyLaboratories
Licensing / Corporation. “Dolby”, thedouble-Dsymbol and
“PROLOGIC”/ aretrademarks ofDolbyLaboratories
Licensing Corporation.
*
2Thisproductismanufactured underlicense fromDTS, / Inc.
ofAmerica.
2000 Matsushita ElectricIndustrial Co., Ltd. All rights reserved.
Unauthorizedcopying and distribution isaviolation oflaw.

1. SafetyPrecaution
(This“SafetyPrecaution”isappliedonlyinU.S.A.)
1. Beforeservicing, unplug thepowercordtopreventanelectric
shock.
2. Whenreplacing parts, use onlymanufacturer’srecommended
components forsafety.
3. Check thecondition ofthepowercord. Replace ifwearordamage
isevident.
4. Afterservicing, besuretorestoretheleaddress, insulation
barriers, insulation papers, shields, etc.
5. Beforereturning theservicedequipmenttothecustomer, besure
tomake thefollowing insulation resistance test topreventthe
customerfrombeing exposedtoashock hazard.
1.1. Insulation Resistance Test
1. Unplug thepowercordand shortthetwoprongsoftheplug witha
jumperwire.
2. Turnon thepowerswitch.
3. Measuretheresistance valuewithohmmeterbetweenthejumper
ACplug and eachexposedmetal cabinet part, suchas
screwheads, antenna, control shafts, handlebrackets, etc. /
Equipmentwithantennaterminalsshouldreadbetween3M and
5.2M toall exposedparts*. (Fig.1)/ Equipmentwithoutantenna
terminalsshouldreadapproximatelyinfinitytoall exposedparts.
(Fig.2)/ *Note :Someexposedparts maybeisolatedfromthe
chassisbydesign. These will readinfinity.
4. Ifthemeasurementisoutsidethespecifiedlimits, thereisa
possibilityofashock hazard. Theequipmentshouldberepaired
and recheckedbeforeitisreturnedtothecustomer.

Fig.1
Fig.2
2. BeforeRepairand adjustment
DisconnectACpower, dischargePowerSupplyCapacitorsC703, C704, C705 and C706 through a
10 , 5Wresistor toground. / DONOTSHORT-CIRCUITDIRECTLY(withascrewdriverblade, for
instance), as thismay destroysolidstatedevices. / Afterrepairsarecompleted, restorepower
graduallyusing avariac, toavoidovercurrent. / Currentconsumption atAC120V, 60HzinNO
SIGNALmodeshouldbe600-1000mA.
3. Protection Circuitry
Theprotection circuitrymay have operatedifeitherofthefollowing conditionsarenoticed:
-Nosound isheardwhenthepoweristurnedon.
-Sound stopsduring aperformance.
Thefunction ofthiscircuitryistopreventcircuitrydamageif, for example, thepositive and
negative speakerconnection wires are“shorted”, or ifspeakersystemswithanimpedance less
thantheindicatedratedimpedance oftheamplifierareused. / Ifthisoccurs, followthe
procedureoutlines below:
1. Turnoff thepower.
2. Determinethecause oftheproblemand correct it.
3. Turnon thepoweronce againafteroneminute.
Note:
Whentheprotection circuitryfunctions, theunitwill notoperate
unless thepowerisfirst turnedoff and thenon again.
4. Accessories

5. Location of Controls
5.1. Mainunit
1. Power“ /I”switch(POWER, /I)
-Press toswitchtheunitfromon tostandbymodeorvice
versa.
-Instandbymode, theunitisstill consuming asmall amountof
power.
2. DSP modeselector(DPS)
3. SFCmodeselector(SFCMODE)
4. Inputindicators(INPUT)
5. Digital inputselect button / indicator(DIGITALINPUT)

6. Inputselector(INPUTSELECTOR)
7. Volumecontrol (VOLUME)
8. Speakerselect buttons(SPEAKERSA, B)
9. Help/reset button (-HELP, —RESET)
10. Headphones jack (PHONES)
11. Displaysection
12. Tapemonitorbutton (TAPE MONITOR)
13. Bass control (BASS)
14. Treblecontrol (TREBLE)
15. Balance control (BALANCE)
16. Subwooferlevel button (SUBWOOFERLEVEL)
17. Subwooferlow pass filterbutton (SUBWOOFERLOWPASS
FILTER)
18. Digital signal processoron/defeat button (—DSP ON/DEFEAT)
19. Tuning button (TUNING , )
20. Preset channel button (PRESET)
21. Band select button (BAND)
22. FMmodeselect button (FMMODE)
23. Memorybutton (MEMORY)
5.2. Displaysection
1. Tunedindicator(TUNED)

2. Monaural indicator(MONO)
3. Stereoindicator(STEREO)
4. Memoryindicator( )
5. Signal format indicators( , PRO LOGIC, DIGITAL)
6. Frontspeakerindicator(-SPEAKERS- )
7. Low impedance indicator(LOWIMP)
8. Display
9. Frequencyunitindicator(kHz, MHz)
10. Speakerindicatorsand signal inputindicators(L, C, R, LS, RS,
LFE)
-Thesignal inputindicatorslightpu toindicate thechannels
containedintheinputsignal. / L:Frontchannel (left) / C:
Centerchannel / R:Frontchannel (right) / LS:Surround
channel (left) / RS:Surround channel (right)
-Ifthesurround channel ismonaural, LSand RSaredisplayed
as S.
-“LEF”(Low FrequencyEffect) isachannel forthedeep-bass
effect inthelow frequencyrange.
6. Location of ControlsforRemoteControl
Transmitter
6.1. Remote control

1. Powerbutton ( )
2. button ( )
3. button ( )
4. button ( )
5. Top menu button (TOPMENU)
6. Displaybutton (DISPLAY)
7. Surround modeselect button (SURROUND)
8. Stereomodeselect button (STEREO)
9. Speakerchannel select button (LEVEL)
10. Delaytimebutton (DELAY)
11. Channel up/downbuttons( CH )
12. Muting button (MUTING)
13. Inputselect buttons/ (TV, VCR, TAPE, CD, TUNER/BAND, DVD)

14. button ( )
15. Cursor/enterbuttons
16. Menu button (MENU)
17. SFCmodeselect button (SFC)
18. Test button (TEST)
19. Delaytime/level adjust buttons(-, +)
20. Direct tuning/disc enterbutton / (DIRECTTUNING/DISCENTER)
21. 10/enterbutton ( 10/ENTER)
22. Numberedbuttons
23. Disc/deck 1/2select button (DISC/DECK 1/2)
24. TV/videoselect button (TV/VIDEO)
25. Volumebuttons(-VOL+)
7. Operation Checks and Component Replacement
Procedures
-Thissection describes procedures forchecking theoperation of
themajorprintedcircuitboardsand replacing themain
components.
-Forreassemblyafteroperation checks orreplacement, reverse the
respectiveprocedures. Special reassemblyprocedures are
describedonlywhenrequired.
7.1. Checking fortheFL P.C.B., surround P.C.B. and IN/OUTterminal
P.C.B.

-Check theFL P.C.B. as shownabove.
-Check thesurround P.C.B. as shownbelow.

-Check theIN/OUTterminal P.C.B. as shownbelow.
7.2. Checking fortheDTSP.C.B.
-Follow the(Step1) -(Step3) ofitem7.1.

-Check theDTSP.C.B. as shownbelow.
7.3. Checking forthemainP.C.B.
-Follow the(Step1) -(Step3) ofitem7.1.

/ / /
/ / /
-Check themainP.C.B. as shownbelow.

/ / / / / /
7.4. ReplacementforthepowerICand regulatortransistor
-Follow the(Step1) -(Step3) ofitem7.1.
/ / / / / /

International Sales
International Sales Office
Stanley-ProtoIndustrial Tools/ 14117 Industrial ParkBlvd., NE
Covington, GA30014 / Phone:[phone]
ARGENTINA
StanleyLatinAmerica, Argentina/ AvenidaMeipu 1413 (Primar

Piso)BuenosAires, ARGENTINA/ Phone:[phone]
AUSTRALIA
StanleyWorks Pty. Ltd. / 58 DoughartyRoadP. O. Box5027
HeidelbergWest D. C. Victoria3081, AUSTRALIA/ Phone:[phone]
-1144
BELGIUM
StanleyWorks Europe/ Belgicastraat 11 BE-1930 Zaventem,
BELGIUM/ Phone:[phone]
BRAZIL
Ferramentas StanleyLtda. / RuaTorreEiffal, 141-Pq, RincaoII Cotia,
SaoPaulo, CEP 06700-000, BRAZIL/ Phone:[phone]
CANADA
StanleyDistribution CenterforHardware&Tools/ 1294 South
Service RoadWest Oakville, OntarioL6J 7K2, CANADA/ Phone:905
-825-1981
CHINA
StanleyWorks China/ Room1808, ScitechTower22
Jianguomenwai AvenueBeijing, Postal Code100004, CHINA/
Phone:[phone]
FRANCE
StanleyFrance / 112, AvenueCharles deGaulle91423 Morangis
Cedex, FRANCE/ Phone:[phone]
GERMANY
StanleyGermanyInc. / AirToolsDivision FrankfurterStr, 74 64521
Gross-Gerau, GERMANY/ Phone:[phone]
ITALY
StanleyItaly/Atro/ ViaParco47 20046 Biassono (Mi), ITALY/ Phone:
39-039-238-9950
JAPAN
StanleyWorks Japan/ 110 Sanmai-Cho Kanagawa-KuYokohama
221-0862, Japan/ Phone:[phone]
KOREA
StanleyWorks, Korea / Room#301, GujinBuilding 1485-2, Seocho-
Dong Seocho-Ku, Seoul 137-070, KOREA/ Phone:[phone]
MEXICO
Herramientas StanleyS.A. deC.v. / Km, 124 Autopista Mexico-

Puebla72030 Puebla, Pue, MEXICO / Phone:[phone]
NEWZEALAND
StanleyTools(N.Z.)Ltd. / 262 ChurchStreet Onahunga, Auckland,
NEW ZEALAND / Phone:[phone]
POLAND
StanleyPoland / UI. Wloska 200-777 Warsaw, POLAND / Phone:48-
22-841-9758
SINGAPORE
StanleyWorks AsiaPacificPtd. Ltd. / No.25 SenokoSouthRoad
Woodland East Industrial Estate Singapore, 758081, SINGAPORE/
Phone:[phone]
SWEDEN
StanleySvenka AB/ Box9054, Datavagen51 SE 400 92 Gotenborg,
SWEDEN/ Phone:[phone]
TAIWAN
StanleyChiroInternational / 121 Yung HoRoadTaYaHsing
Taichung Hsien, TAIWAN/ Phone:[phone]
THAILAND
StanleyWorks Ltd. / Wellgrow Industrial Estate, 103, Moo 5, Bangna-
Trad/ Highway, Tammbol Bang AmphurBangpakong /
Chachoengsao24130, THAILAND / Phone:[phone]
UNITEDKINGDOM
TheStanleyWorks / OneSquirrelsDreyEdgcombePark
Crowthorne, BerkshireRG45 68A, ENGLAND / Phone:[phone]-
2110
UNITEDSTATES
-Arizona/ Mail Media/JensenTools, Inc. / 7815 South46thStreet
Phoenix. AZ85044 / Phone:[phone]
-Florida/ StanleyWorks LatinAmerica / 8240 N.W. 52thTerrace,
Suite 505 Miami, FL 33166 / Phone:[phone]
-Michigan/ StanleyBeta Tach/ 16005 Sturgeon Roseville, MI 48066 /
Phone:[phone]
-NorthCarolina/ TheStanleyWorks / DoorsProduct Group 7300
Reames RoadCharlotte, NC 28216 / Phone:[phone]
-Texas / StanleyMechanics Tools/ 12827 ValleyBranchLaneDallas,
TX75234 / Phone:[phone]

8. Type Illustration of ICs, Transistorsand Diodes
9. SchematicDiagram
9.1. SchematicDiagramNotes
-Thisschematicdiagrammaybemodifiedat anytimewiththe
developmentofnew technology.
Notes:
-S950 :Powerswitch(POWER)
-S951 :Speakerselect switch(SPEAKERSA)
-S952 :Digital signal processoron/defeat select switch/ (-DSP ON/
DEFEAT)
-S953 :Subwooferlow pass filterswitch/ (SUBWOOFERLOW
PASS FILTER)
-S954 :Subwooferlevel switch(SUBWOOFERLEVEL)
-S955 :Tuning decrease switch(TUNING )
-S956 :Tuning increase switch(TUNING )
-S957 :Tuning modepreset switch(PRESET)
-S958 :Digital inputselect switch(DIGITALINPUT)
-S960 :Tapemonitorswitch(TAPE MONITOR)
-S964 :Memoryswitch(MEMORY)
-S965 :Band select switch(BAND)
-S966 :FMmodeselect switch(FMMODE)
-S967 :Speakerselect switch(SPEAKERSB)
-S969 :Help/reset switch(-HELP, —RESET)
-VR501 :Volumecontrol VR(VOLUME)
-VR502 :Balance control VR(BALANCE)
-VR511 :Bass control VR(BASS)
-VR512 :Treblecontrol VR(TREBLE)
-VR901 :Inputselect switch(INPUTSELECTOR)
-VR902 :DSP modeselect switch(DSP)
-VR903 :SFCmodeselect switch(SFCMODE)
/
-Indicatedvoltagevalues arethestandardvalues fortheunit
measuredbytheDC electroniccircuittester(high-impedance) with
thechassistakenas standard. Therefore, theremayexist some
errorsinthevoltagevalues, depending on theinternal impedance