Panasonic SAHT280 - RECEIVER Manuale utente

ORDERNo.MD0004059C1

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.

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.

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