Technics St 500

7/14/2019 Technics St 500

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TechnicsO U A R T Z Synthesizer AM/FM Stereo Tuner

S T 5 0 0O U A R T Z Synthesizer LW/MW/FM Stereo Tuner

S T 5 0 0 LOPERATING INSTRUCTIONS

These instructions also apply to units of different color.

Before operating th s unit please re ad these instructions completely.


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We want to thank you tor selecting this product andto welcome you to the growing family of satisfiedTechnics product owners around the world.We teel certain you wil! get maximum enjoyment

trom this new addition to your home.Please read these operating instructions carefully,and be sure to keep them handy tor convenientreterence.These Operaling Instructions are applicable 10models ST500 and ST500L. The functions which differ for the two models are indicated in theOperating Instructions.

Contents- Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2 -Memory Presettings . . . . . . . . . . . . . . . . . . . . ' 6- Before Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - Listening to Radio Broadcasts .. . .. . . . . 8-Suggestions for Safety . . . . . . . . . . . . . . . . . .. 3 -Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9- Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 -Technical Specifications. . . . . . . . . . . . . . . . . .. 9- Front Panel Controls and Their -Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . 10Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5

ccessories (Reler to page 4.) AC power supply cord. . . . . . . . 1 FM indoor antenna. . . . . . .. 1 AM loop antenna . . . . . . . . . . . . 1

Stereo connection cabie. . . . . . 1 AM antenna holders. . . . . . . . . . 2 Screws . . . . . . . . . . . . . . . . . . . . . 2

~ A ) ~ B )Note: Conliguration ol AC power supply cord and FM indoor antenna dilIers according to area.

Before UseBe su re to disconnect the mains cord belore adjusting the 11 Ihe power supply in your area is 117 Vor 120 V set 10 the "127voltage selector. V position.)Use a minus - ) screwdriver to set the voltage selector (on the Note that Ihis unit will be seriously damaged il Ihis setling is notrear panel) 10 the voltage setting lor Ihe area in which Ihe unit will made correctly. (There is no voltage selector lor some countries;be used. the correct voltage is al ready set.)

THIS TUNER/RECEIVER IS CAPABLE OF RECEIVING THE NEW AM STEREO BROADCASTS FROM THE AM BAND RADIO STATIONS.HOWEVER LlKE MANY TUNERS AND RECEIVERS CURRENTLY AVAILABLE ON THE MARKET IT WILL REPRODUCE THIS AM STEREOSIGNAL ONL Y IN AM MONO. WHICH, IN EFFECT. IS OF NO LESSER QUALITY THAN YOUR EXISTING AM MONO TUNER/RECEIVER

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Suggestions for Safety Use a standard electrical AC wall outlet1. Use from an AC power source of high voltage, such as forair condItIoners, Is verydangerous.Be extremely careful not to make a connection to the elec

trical outlet lor a large air conditioner or central-heating unitwhich uses high voltage, because there is the possibility ollire.2. A DCpower source cannot be used.Be sure 1 check Ihe power source carelully, especially on aship or other place where DC is used.

Connection and removal of the power cordplug1. Wet hands are dangerous.A dangerous electric shock may result il the plug is touched bywet hands.2. Don't pull the power cord.Always grasp the plug; never pull the cord itselt.x Never attempt to repair or reconstruct thisunitA serious electric shock might occur il th is unit is repaired,disassembied or reconstructed by unauthorized persons, or il theinlernal parls are accidently touched.x For families with childrenNever permit children to put anything, especially metal, insideth is unit. A serious electric shock or malfunclion could occur il articles such as coins, needies, screwdrivers, etc. are insertedthrough the venlilation holes, etc. ol th is unit

x Turnoft after useII the unit is lef! lor a long time wilh the power on, this will not onlyshorlen its uselul operation lile, but m y lso cause other unexpected trouble.

If water is spilled on the unitBe exlremely careful il water is spilled on Ihe unit, because a lireor serious electric shock might occur. Immediately disconnectthe power cord plug, and consult with your dealer.

x Place the unit where it will be weil ventilated,and away from direct sunlightPlace this unit at least 10 cm (4") away Irom wall surfaces, etc.,and away Irom direct sunlight.

x Keep the unit away from heaters, etc.Heat can damage the external surfaces as weil as internal circuits and components.x Avoidspray-type insecticidesInsecticides might cause cracks or "cloudiness" in the cabineland plastic parls ol Ihis unit. The gas used in such sprays might,moreover be ignited suddenly.

Never use alcohol or paint thinnerThese and similar chemicals should never be used, because theymay damage the linish.x

6 If trouble occursx . It, during operation, the sound is interrupted or indicators nolonger illuminate, or il abnormal odor or smoke is detected, im-mediately disconnect the power cord plug, and contact yourI dealer or an Authorized Service Center.3


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I FM antenna terminal is as shown belOWlBe surethe shieldbraid contacts theclamp.

Stereoconnectioncable(included) - - ~ . . : : : . . ~ ~ ~ ~ ~ ~ ~ ~ ~ C ~ ~ ~ ~ (L)

The indication AM used here includesboth MW and LW lor Model ST-500l.ConnectionsNote: An outdoorantenna shouldbe installedbyacompetent technicianonly.

FM ouldoor antenna (option) FM indoor antenna (included)(Necessaryin mountainous regions,insi dereinforced-concrete buildings, etc.)

75-ohmcoaxialcab Ie (option)

1 [J' LJBJ:=t J20mm(25/32 ) 10 mm (3/8 )

ClampShieldbraidCenterconductor

~ ' ~ (T ~ ortape Ior

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Installalion of he AM loop anlenna1. Payattentontothefollowingpointswhenattachingtheanten

na.Do not attach it horizontally(todo so would impairrecep

tion).Do not attach it close to metal surfaces (to do so would

result in noise). enattaching the antenna to a wal , columnor rackFind the height and direction of the antenna wherereception is best andthen fix it vertically to thewall,rack, etc.

AM loopantenna (included)_ . ~ . I

Column i6 >, , , ~ .iAMantenna

holder (A) (included)

Attach to awall(usingtack ortape)facing in direction( . ~ - ofbest reception.Tackshouldnotcontact internalantennawire.

Tackortape i Forbestreceptionsoundquality,an FM outdooranten/ ' /i na is recommended..JJ. Disconnect thisantennaifan FM outdoorantenna is in-stalled.Control input terminal (CONTROL INPUT):Thisterminalis usedfortheconnectionofatimerforthepurposeof controllingthetunerbymeans of anexternalcontrol signal.

HouseholdAC outlet. " - ~AC powersupplycord(included)ConfigurationofAC powersupplycorddiffersaccordingtoarea.

To tuner inputterminals(R) of theamplifierAM loop anlenna (included)

Ifths antennaisnotproperlyinstalied,AM broadcasts will notbereceived.Be sureto connect theAM loopantennaeven when an outdoorantenna is used.

AM ouldoor antenna (option)5 12 m (16 40 ft.) (Necessary in mountainous regions, in-

siderei nforced-concrete buildings, etc.)Use5 - 12m(16 - 40ft.)ofvinylcoveredwirehorizontallyatthewindow.

'nyl-coveredwire(option)

Donotattach it closetopowercords,speakerwires,etc.(todo sowould result in noise).

Donotattach itclosetoatapedeck (whenthetapedeck isbeingused, chirping orbeepingsoundsmay be received).

2. Connect theAM loop antenna tothe AM 3ntenna terminalslocatedon therearpanel ofthe unit.When attaching the antenna to the unit---This typeof installationmay cause impaired receptonor result in signaInoise. Ifpossible,attachtheantennatothe rack, awall, oracolumn.Move the antenna toward the right or left to findthepointof bestreceptioll . AM loop antenna

(included)

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ront Panel Controls and TheirThe indication AM used here includesboth W and LW tor Model sT500L.Functions

Power stand by eb on switchThis switch turns on and olf the secondary circuit power only_ The unit is in the"stand-by" condition when this switch isset to the "stand by position.Regardless ol the switch setting, theprimary circuit is always "live" as long asthe power cord is connected to an electrical oullet.Memory indicator(memo)This indicator illuminateswhen the memory bultonis pressed.

FM stereo indicator(stereo)This indicatorautomatically illuminateswhen an FM stereobroadcast is beingreceived.

Band selectors (band)FM:Press th is button to listen to an FMbroadcast.AM:Press this button to listen to an AMbroadcast.allocation:This bulton is also used to select a Irequency step of either 9 kHz or 10kHz.When the AM button is pressed forabout 4 seconds, the AM Irequencystep wil! change to 10kHz per step.(This slep is set to 9 kHz belore shipmen!.)Sel to the appropriate posilion lor yourlocality.In order to relurn to the original Irequency indication, press this buttonlor about 4 seconds again.

Digital frequency displayote: The recept on Irequency of the FM or AM broadcastt will not illuminate il theFM mode selector is set selected by using the tuning but tons or the preset-tunto the monaural mode. ing buttons is indicated by a digital-type display.

FM MW LW

Band selectors (band)FM:Press Ihis button to listen to an FM broadcas!.MW:Press Ih s bulton 1 listen 1 an MW broadcastallocation:This button is also used 1 select a frequencystep ol either 9 kHz or 10 kHz.When the MW button is pressed lor about 4seconds, the MW Irequency step will change to10 kHz per step.(This step is set to 9 kHz belore shipment.)Set to the appropriate position lor your locality.In order to return to the original frequency indication, press this button lor about 4 seconds again.LWPress this button 1 listen 1 an LW broadcast.freq shift:When Ihe LW bullon is pressed for aboul 2seconds during reception ol an LW broadcast,the LW Irequency will decrease by 2 kHz.So for example, 1 receive 153 kHz, lune 1 155kHz, and then press this button.In order to return 1 the original Irequency indication, press this button lor about 2 seconds again.

ST5

Channel display------- 'The channel number selected by the preseItuning buttons is displayed.

These buttons are used lor tuning to thedesired broadcast station.

Quartzlock indicator (quartz loek)This indicator illuminates when tuned precisely toan FM or AM station.

Signal-strength indicators (signal) _----These indicators show the relative strength of broadcastsignals being received by the anten na. The best condition lor reception, lor FM and AM, is when the indicatorsilluminate completely to the top.

Preset-tuning buttons 1 - 16)

Memory button (memory) -----This button is used when preset memory settingol the preset-tuning buttons is made.

FM mode selector (FM mode -- . . ; /This unit automatically switches into the stereo mode wh en astereo broadcast is received. Press this button to listen in themonaural mode. The stereo indicator will not illuminate in themonaural mode.

(16 channel random preset tuning)These bultons are used to preset FM and AM broadcast Irequencies into the memoryol this unit, and are also pressed to select the desired preset Irequencies.Note:Reler 1 pages 6 and 7 for inlormation concerning preset memory.


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The indication AM used here includesboth MW and LW for Model ST500l.Memory PresettingsImportantl Notes:1. Forautomaticpresetting in areaswherethereareIess than16II thisantennaisnot installed, FM stations,theremainingchannels(throughchannel 16) wil!AMbroadcastswill not be be lelt empty. The empty channels can be lilled by usingreceived, MlOOp antenna manualmemorypresetting.

2 II a new broadcasting station is preset into achannel, thebroadcasting station which was previously entered in thatWith th isunityoumaypreset asmanyas16radiobroadcaststa- channelwillbeautomaticallyerased,tions: FM/AM random presetting, Afterbroadcast stations have 3. For AM broadcasts with extremely strong signa transmisbeenpresetasdescribedbelow,anydesiredstationcanbequick- sions,thefrequencymemorizedmaybeslightlydifferentIromIy andeasilyselectedby simplytouchingonebutton thecorrect frequency,Ifthisoccurs,usethemanualcontroltomemorize.Automatic memory presetting

TheFM broadcastingstationsandAM broadcastingstationswillbeautomatical!ypresetto channels 1through16lor FMand9through16 lor AM, respectively,The FM broadcasting stations,MW broadcaslingstations, and LW broadcastingstationswill be automaticallypreset inchannels 1through 16 for FM, 9through 16 forMW, and 13 through 16 for LW, respectively.

Note: WhenAM isautomaticallypreset,IheFM stationson channels 9through 16wil!be replacedby thenewAM stations,"FM": lor FM broadcasts Beforepresettingthebroadcasting"on" I __ ) "AM": forAM broadcasts stations,presstoselecttheappropriatefrequencystepforyour"FM": for FM broadcasts locality,Channel display "MW": lor MWbroadcasts (Reler topage 5.)"LW": for LW broadcastsMemoryindicator

5 Confirm the names (call signs, 3 Set to the lowest frequency.etc.) of the broadcasting sta Tuning Pressthe leftbutton tochangethe Irequencydownward,tions which are preset to each andpresstherightbuttontochangethefrequencyupward.channel, and enter them on the FM: 87.50 MHzfile sheet (page 8 . AM: 522 kHz (9 kHzstep)or 53 kHz (10 kHz step) To check the front channels (CH 1 - 8 - FM: 87.50 MHzPressmomentarily, MW: 522 kHz (9 kHzstep)or 53 kHz (10 kHzstep)- LW: 153 kHz (- 2kHzshift) or 155 kHzo ~ 1 Pressthebuttonandholdslightly(frequencywil!changecon- 'r%inuouslYl... requencystoredin thememoryandchannelnumberaredisplayed, 2 Release it when approaching the above exact frequency, : Q ~and then press Ihe button again momenlarily (frequency0- r : changewillstop) u1 UMH IC Il:J... ~ OfuTo check the back channels (CH 9 - 16) ',tPress thebuttonmomentar ily(IrequencywilIchangeeachPressslightlylonger. timeIhebuttonispressed),andtune10 oneoftheaboveIre- . 1< quencies* C 3 0 ~

, , , _ - i ; ; r ~ , ;L 4Press. When the frequency indication begins to change,Frequencystoredin Ihememoryand release.channelnumberare displayed. Thefrequencywillchangeupward,andtheautomatic presettingwil! begin J.githIhenextbroadcaslingstation,Itwill continue10 presetconsecutivebroadcaststations.-


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"Mostrecent" memory To prevent erasing the memoryThe most-recent memory is a system by which the unit 1I the power supply is interrupted or one week or longer, theremembers the FM or AM broadcast station last heard when memory settings will be erased.th is unit is turned olf, and automatically tunes to that station the For example:next time the power is turned on. 1) If the power cord is disconnected from the electric outie!,

2) If an audio timer is used and the timer does not operate theuner for a week or longer,

3) If a power failure occurs, etc . "Backup" memoryThis is the function which preserves the preset memory and If any of the above occurs, the memory will have to be reset.most-recent memory functions. In the event of a power failure, or The memory in th is unit is maintained by a gold capacitor. If theif the power cord of the tuner is disconnected from the electric power supply is interrupted for a week or longer, set the poweroutlet, the back-up memory will preserve the preset memory and switch of the tuner to the on position for thirty minutes or moremost-recent memory functions for as long as approximately one in order to recharge the gold capacitor. Then reprogram theweek. memory (pages 6 and 7).

Manual memory presettfngStations can be freely preset to any desired channel.

2 "FM". for FM broadcasts Before presetting the broadcasting1 '1.I;ID"on" I-.OL) . "AM": for AM broadcasts stations, press to select theappropriate frequency step for your"FM": for FM broadcasts locality._'1 '1111_ "MW": for MW broadcasts (Refer to page 5.)"LW": for LW broadcastsChannel displayMemory indicator

5 While the memory indicator is 3 Press the appropriate tuningiIIuminated, press the button the desired broadcast.of the desired channel. TuningWhen the button is pressed, the memory in Press the left button to change the frequency downward, anddicator illumination will stop, and the preset press the right button to change the frequency upward Automatic tuningting is complete. Press the button. When the frequency indication To preset channels 1 through 8: begins to change, release the button a broadcastingPress the appropriate button momentari station will be selected automatically). Repeat thisIy, and then release. (Preset channel operation until the desired station is found.number is displayed on the channel Manual tuningdisplay.) Press the button momentarily and tune to the desired To preset channels 9 through 16: station. The frequency will change each time the button is pressed.ress the appropriate button slightly

longer, and then release. (preset channel number is displayed on the channeldisplay.) 4 Press momentarily, and thenNote: (The memory indicator will illuminate for approxIf the memory indication illumination stops before imately 4 seconds.)you press the button, once again repeat step 4 and

then step 5.

Note:6 Enter the name (call sign, etc.) of the preset If the button is pressed continuously, the frequencybro dc sting st tion on the st tion will begin to change, and the memory will be presetmemory file sheet (page 8 . automatically.This completes the procedures for presetting radio broad To stop the automatic memory presetting, oncecast frequencies. The other preset-tuning buttons can be again press either the llP button or the down butpreset in the same way by following steps 2 through 6. ton.

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Listening to Radio BraadcastsImportant -----------------..

If this anten na is not installed,AM broadcasts will not bereceived.

Have you completed the memory presetting (page 6 and 7 ?

AM loop antenna1Turn the amplifier on, and set it for listening toradio broadcasts.3 Select the desired station by using either themanual or presettuning buttons.2 on" ( - ... ) For station setection using p r e s e t ~ t u n i n g buttons

To select the front channels (CH 1 - 8 : To select the back channels (CH 9 -16):Press Frequency stored in the Press slightly Frequency stored in themomentarily. memory and channel longer memory and channel

number are displayed. number are displayed. : .... Ol' ... ...I k.Hzch ~

For manual station selection.Follow step 2, 3 of "Manual memory presetting" on page 7.

5T500~ _.~ __ . t_t I j .2_10 I 3_11 I 4_12 ! 6_13 . 6 _ " 7_15 &_1& I ~ i i i i : _ . .g_ ..j bau_ _ ~ ~ ~ ~ ~ ~:::::::::: :;;;:;:- ~ i P~ 4

1 .4

FM mode selector (FM mode) _ . . /If the broadcast signal is weak, or if there is a large amount of interference in a stereo broadcast, set to the monaural position.Note that the FM stereo indicator will not illuminate in this position.

Station Memory File SheetCH.8H.1 CH.2 CH.3 CH.5 CH.6 CH.7H.4

CH.16H.14 CH.15H.9 CH.10 CH.11 CH.12 CH.13

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aintenanceTo clean this unit, use a soft, dry cloth. Wipe on ce again with a soft, dry cloth.II the surlaces are extremely dirty, use a solt cloth, dipped into a Never use alcohol, paint thinner, benzine, nor a chemicallysoap-and-water solution or a weak detergent solution. treated cloth to clean this unit.Wring the cloth weil before wiping the unit. Such chemicals may damage the linish of your unit.

Technical SpecificationsDIN 45 500)

FM TUNER SECTION AM MW) TUNER SECTIONFrequeney range 8 7 . 5 0 ~ 1 0 8 . 0 0 MHz (0.05 MHz step) Frequeney range 5 2 2 ~ 1 6 1 1 kHz (9 kHz-steps)Sensitivity 1 5 J N1750 (IHF '58) 5 3 0 ~ 1 6 2 0 kHz (10 kHz-steps)

SIN 30 dB 1.3 j.1V (750) Sensilivily SIN 20 dB) 20 I.N 3001.NlmSIN 26 dB 1.2j.1V (750) Seleclivily +9 kHz) 55 dBSIN 20 dB 0.9j.1V (750) Image rejeelion al 999 kHz 40 dB

IHF 46 dB slereo quieting sensilivily 22 j.1V/750 IF rejeclion al 999 kHz 60dBTolal harmonie dislortionMONO 0.15% LW TUNER SECTION ST-500L only)STEREO 0.3%

SIN Frequency range 1 5 5 ~ 3 5 3 kHzMONO 70 dB (78 dB, IHF '58) 1 5 3 ~ 3 5 1 kHz 2 kHz shilt)STEREO 65 dB (70 dB, IHF '58) Sensitivity SIN 20 dB) 50 j.1VFrequency response 20 H z ~ 1 5 kHz, -0.5 d B ~ 1 . 5 dB Selectivity at 254 kHz 55 dBAllernale channel selectivity Image rejection at 254 kHz 40 dBnormal :::400 kHz 65 dB IF rejeetion at 254 kHz 60 dBCapture ratio 1.0 dBImage rejection at 98 MHz 40dB GENERALIF rejection at 98 MHz 70 dBSpurious response rejection at 98 MHz 70 dB Output voltage 0.3V O.6V, IHF)AM suppression 55 dB Power eonsumption 9 WStereo separation Power supply1 kHz 40 dB For Australia AC 50 Hz/60 Hz, 240V10 kHz 30 dB For continental Europe AC 50 Hz/60 Hz, 220VCarrier leak For others AC 50 Hz/60 Hz, 11OV /127V1220V/240V19 kHz -30 dB (-35 dB, IHF) Dimensions WXHXD) 430 X 53 200 mm38 kHz -45 dB 50 dB. IHF) (16-15/16" X 2-2/32 X 7-27/32")Channel balanee (250 H Z ~ 6 , 3 0 0 Hz) 5 dB Weight 1.8 kg (3.9 lb.)Limiting point 1.2 j.1VBandwidth Note:IF amplifier 180 kHz Total harmonie distortion is measured by the digitalFM demodulator 1000 kHz spectrum analyzer (H.P. 3045 system).Antenna terminals 750 (unbalanced)
http:///reader/full/87.50~108.00http:///reader/full/87.50~108.00


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Troubleshooting uideBelorerequestingservice lor th is unit,checkIhe chartbelowlor apossiblecauseol theproblemyouareexperiencing.SomesimplechecksoraminoradjuslmentonyourpartmayeliminateIheproblemandrestore properoperation.you are in doubtaboutsomeol thecheckpoints,oril Ihe remediesindicated in Ihe chartdonotsolve Ihe problem,relertothedirectoryolAuthorizedservicecenters(enclosedwiththsunit)tolocateaconvenientservicecenIer,or consultyourTechnicsdealerforinstructions.

Probable cause(s) Suggested remedy

Nearbybuilding or moun n(Mulli-path distortion isbeingcausedby themutualinterferenceof broadcastsignalsreceiveddirectly from thetransmitting station(direct waves)and signalsbeingreflected Iromnearbybuildings or mountains (reflected

ning buttons ol thsunit have not

Try reducing thetreblesound by turning Ihetreble lone controlol theamplilier.

Setthe FM mode selector to the mono position.(Note thatthebroadcastwillthen be heardasmonauralsound.)

Trychanging the location,heightand ordirction ol theantenna.

IIan indoor antennais beingused,changetoanoutdoor antenna.

T usi anantenna with more elements. Try changing thelocation,height and/ordirection ol theantenna.

I Ian indoor antennaisbeingused,change10 anoutdoor antenna.

Try usingan antennawith moreelements.

minutesor more to perlorm thecharging, andthenmakethe memory presettingagain.

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Technics St 500