Sony ST-JX285 User's Manual
Contents
1. Do not place anything on top of the amplifier The ventilation holes must be unobstructed for the proper Operation of the unit and to prolong the life of its components e Should any liquid or solid object fall into the unit unplug the stereo system and have the unit checked by qualified personnel before operating it any further For repairs take in all the components together even if only one needs repairing On installation e Avoid installing or leaving the stereo system in a location near heat sources such as radiators airducts or heaters subject to direct sunlight exposed to rain or moisture where it is liable to come into contact with dust or dirt that is unventilated such as a bookcase If you have any question or problem concerning your stereo system that is not covered in this manual please consult your nearest Sony dealer For the customers in the U S A For detailed precautions see the leaflet IMPORTANT SAFEGUARDS For the customers in Canada CAUTION TO PREVENT ELECTRIC SHOCK DO NOT USE THIS POLARIZED AC PLUG WITH AN EXTENSION CORD RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE To change the AM tuning interval The AM tuning interval is preset at the factory to 10 kHz to match the frequency allocation system of your country To change the interval to 9 kHz proceed as follows Depress the POWER switch to turn on the system Pr2. Accessories supplied Flat cord with 7 pin connectors 1 Flat cord with 11 pin connectos 1 AM loop antenna 1 FM ribbon antenna 1 45 rpm adaptor 1 Dust cover 1 Canadian model only RM S380 Remote commander 1 Sony SUM 3 NS batteries 2 Design and specifications subject to change without notice 1S ae ea m Ea E o A E a Trubleshooting Guide The following checks will assist in the correction of most Before going through the check list below first pay attention problems which you may encounter with you set to the following fundamental points Should any problem persist after you have made these e The power cord must be firmly connected checks consult your nearest Sony service facility e The speaker connection must be firmly made e The flat cord and other connecting cords must be firmly connected Radio Program Reception The STEREO indicator flickers Severe hum or noise e Adjust the antenna e The signal strength is too weak Connect the external antenna e Adjust the antenna e Connect the ground wire Cassette Deck Operation No cassette in the cassette holder e The tab is removed from the cassette The button does not activate The button or gt button cannot be activated Tape does not run even when the amp button The If button is depressed is depressed e The cassette holder is not properly closed Noises increase while record
3. Press the first digit followed by the second one For example To memorize a station to 10 press 1 then 9 MEMORY SCAN Which stations are skipped during memory scanning The memory scanning function skips numbers which are not Stop scanning preset and also skips stations with a weak signal strength Tape Playback on either deck A or B lor UNETION gt FUNCTION a co z e oe c a Select source and play To stop recording Tape type selection Press E amp When playing back select the tape type with the TAPE DECK A DECK B selectors referring to the tape list below To start recording more precisely gt Ras A Tape Type Tapes C 46 C 90 ress 3 Adjust recording level typet SONY PEATS NEES 4 Pr in at the desired point NORMAL Other TYPE I equivalent tapes ess II again at the desired point For 120 us and NORMAL BIAS A Dolby setting TYPE II SONY UX UX S UX ES UX PRO The DOLBY NR switch operates on both decks A and B CrO2 Other TYPE II equivalent tapes H DOLBY NR switch for 70 us and HIGH BIAS TYPE IV SONY METAL ES Cassette recorded with Dolby NR ON a METAL Other TYPE IV equivalent tapes Non Dolby cassette o _ OFF oO n 7 For 70 us and METAL BIAS 10 Exposed tape facing down TAPE DECK 8 Owen SS cea o TYPEN n REC INDICATO
4. Refer to lower part of page 10 Select dubbing speed To dub a whole tape HIGH a To edit the tape NORMAL o Dubbing will start To stop dubbing Soe a ase E Press ml amp on deck A and then press m 4 on deck B v o Oo 45 33 Select speed Stylus guard Note e If the tonearm does not return to the arm rest during initial Operation press the REJECT button After this the tonearm automatically returns to the arm rest e Ifyou move the tonearm close to the center while the turntable is rorating the tonearm may return to the arm rest Do not resist this movement as this may damage the automatic return mechanism 13 Remote Commander Supplied MUTING button Function selectors TUNER PRESET selectors POWER ON OFF switch CD player operation buttons Used for optional CD player Tape deck pause button This button does not function with this system VOL volume buttons installing Batteries Notes on batteries Battery life About a half year of normal operation can be expected when using the Sony SUM 3 NS batteries When the batteries are exhausted the remote commander cannot operate the unit If this happens replace both batteries with new ones o To avoid battery leakage When the commander is not to be used for a long time remove the batteries to avoid damage caused by battery leakage and corrosion Note With
5. some Sony CD players the SHUFFLE and PGM modes of this commander cannot be released To do so use the CONTINUE button in the CD player WEU CUE decks Clean after every 10 hours of operation and before recording for optimum recard playback quality 1 Press m amp of the both decks A and B 2 Slightly moisten the tip of a cotton swab with cleaning fluid or alcohol 3 Wipe heads pinch roller and capstan Cleaning the Heads and Tape Path both Erase head YA K Cotton swab ai Pinch roller Record playback head B Playback head A Do not insert cassette until cleaned areas are completely dry Demagnetizing the Heads both decks After 20 to 30 hours of use it is necessary to remove residual magnetism built up on the head Turn off the power and demagnetize heads with any commercially available demagnetizer 14 Cleaning the Cabinet Replace the stylus after approximately 400 hours of use An ND 155G replacement stylus is available at your Sony dealer Handie this delicate stylus with case 1 Turn off POWER of the amplifier 2 Secure the tonearm to the arm rest 3 Detach the stylus assembly by grasping it with your fingers 4 Ins rt the new stylus Pull out Replacing the Stylus erly Clean the cabinet panel and controls with a soft cloth lightly moistened with a mild detergent solution Do not use any type of abrasive pad scouring
6. AKERS select buttons No sound will be heard if only one of the speaker system is connected and the SPEAKERS select buttons A and B are depressed FM antenna Suplied FM wire antenna For normal reception For higher quality reception Qutdoor FM antenna 75 ohm coaxial cable AM loop antenna supplied For better AM reception Extend a 6 to 15 meter insulated wire out of doors Connecting a VCR VIDEO AUDIO IN Supplied flat cord connection Depress until it clicks Disconnect AC OUTLET These are used to power other audio components whose power consumption is less than the wattage indicated on the AC outlet SWITCHED This outlet is controlled by the POWER switch CAUTION Do not connect any electrical home appliances such as an electric iron fan TV or other high wattage equipment to these AC outlets CD player pine CurpUts to a walt outlet 00000 0 Audio line outputs to a wall outlet Audio Adjustment Volume Adjustment 2 Turn VOLUME clockwise to increase the sound level Adjust the graphic equalizer controls according to To decrease it turn the control counterclockwise Personal preference The room acoustics For instance playback in a room with To decrease the sound level temporarily padded walls or furniture will probably sound better with Press MUTING The sound cannot be heard the high frequencies booste
7. R sizs a Lights up REC LEVEL DOLBY NR a on l oF Pale Adjust recording level Select tape type selector and Dolby NR ecordi If the recording level setting is too high the recording will be R rding Level Adjustment distorted and if it is too low the tape will produce a hissing Adjust the recording level according to the tape type by sound observing the PEAK LEVEL METERS Recommended maximum peak level meter reading r 3 To prevent accidental erasure To reuse a cassette To protect side A recording PEAK LEVEL METER i a E o TYPE IV metal tape plas lt i to TYPE I normal TYPE II CrO2 tapes Z sZ TabofsideB Tab of side A S I SS Bam l LEFT RIGHT 1 1 Tape Dubbing POWER Recorded cassette Blanck cassette DOLBY NR TAPE type select 3 TAPE type select NCTION sdi a E a cD TUNER PHONO For 17 cm record 45 rpm adaptor supplied When the record has finished playing When the tonearm reaches the end of the record it will automatically return to the arm rest To lift up the stylus during play Set the cueing lever to To stop during play Press REJECT te 2 DUBBING SPEED HIGH O NORMAL Select tape type selector and Dolby NR
8. SONY stereo Component System 3 769 969 21 1 SEN 280 Operating Instructions Before operating the unit please read this manual thoroughly This manual should be retained for future reference Owners Record The model and serial numbers are located at the rear of each model Record the serial numbers in the spaces provided below Refer to these numbers whenever you call upon your Sony dealer regarding these products Model No PS LX285 Serial No Model No TA AX285 Serial No Model No ST JX285 Serial No Model No TC W285 Serial No 1988 by Sony Corporation WARNING To prevent fire or shock hazard do not ex pose the unit to rain or moisture CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER OR BACK NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL This symbol is intended to alert the user to the presence of uninsulated dangerous voltage within the prod uct s enclosure that may be of suffi cient magnitude to constitute a risk of electric shock to persons This symbol is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompa nying the appliance Note to CATV system installer This reminder is provided to call the CATV system installer s attention to Article 820 22 of the NEC that provides guidelines
9. d To resume the original level press the button again e Program quality If reception contains hiss cutting the high frequencies will improve reproduction Receiving Radio Programs Before reception be sure to connect the Supplied AM and FM antenna Automatic Tuning FUNCTION r7 SYSTEM n ee a eT at a EO BAND TUNING FM AM AUTO TY FM or AM Relese automatic tuning AUTO disappears on the display window Select the band a Sass To equalize the listening to sound slide each control When speaker position is not symmetrical adjust the upwards to increase the level of the frequency band and strength of left and right speaker outputs with the left and downwards to decrease the level right graphic equalizer controls 100 Hz Use to boost or cut the bass 400 Hz Use to adjust the middle frequency range 1 kHz Use to provide more presence of vacals 4 kHz Use to adjust the brightness of sound 12 kHz This control effects general treble Slide downwards to reduce high frequency noise such as tape hiss To listen to the sound with the original tone quality set all the controls at their center positions Selecting the speaker system To drive speaker system A depress button A To drive speaker system B depress button B To drive both speakers depress buttons A and B Note When both A and B buttons are depressed tw
10. ess the TUNER button Press the BAND FM AM selector to select AM Press the POWER switch to turn off the system While pressing the TUNING button press the POWER switch to turn it on To reset the interval to 10 kHz follow the same procedure afmand Note When the interval is changed all stations memorized to the 10 key station preset selector will be erased After changing the interval be sure to memorize the stations again Turntable Assembly Canadian model only Motor pulley Move the metallic parts inside the larger gear in the direction of arrows Connections e The power cord should be connected last of all first Conventional audio cord connection making sure that the SYSTEM POWER switch is turned off Cord plugs and jacks are color coded The red plugs and e The cable connectors should be fully inserted into the jacks are for the right channel R and white ones for the left connectors A loose connection may cause hum and noise channel L e Keep the speaker cords connecting cords and power cord away from the AM loop antenna and the tuner s antenna lead in to avoid possible noise pickup Speaker cords Speaker system For right TA AX285 ap speaker RA The TA AX285 has connectors for two pairs of speaker systems system A and system B which can be selected individually or simultaneously by means of the front panel SPE
11. for proper grounding and in particular specifies that the cable ground shall be connected to the grounding system of the building as close to the point of cable entry as practical Ea Table of Contents Getting started PECAUTIONS nasker raana siere Eada esas Turntable assembly Canadian model only 3 Connection ena a aeaea a R A E ETNE Nens Using your stereo Audio adjustment 00 eescseeeseseeceseeteseeseeeneeseeneenecsueevecnteateneeatenseanees Receiving radio programs ou esessesseeee se eeseestessescsnsenseneseneees Automatic tuning a Manual tuning inaasa Memory preset smiir iii Reciving a memorized station Scanning the memorized station A hanes 8 Tape playback on either deck A or B 0 scece eens 10 Tape recording deck B a Tape dubbing sessccasvecasscavccsseutcsssdestccaastadaaiaac r a Playing record uenia ane ia A Remote commander Supplied eee seseeseecesestestesesseeneeaeees 14 Maintaing you stereo Maintenance ra aae r EEE a a oe SEES 14 Getting into the details a SPOCIFICATIONS sisse EA 15 Troubleshooting Troubleshooting guide esc sesessetesesseeseserenes back cover Precautions On safety Operate the stereo system only on 120 V AC 60 Hz Unplug the stereo system from the wall outlet if it is not to be used for an extended period of time To disconnect the cord pull it out by grasping the plug Never pull the plug out by the cord
12. ing and e Dirty heads playback e Magnetic built up on the heads There is a decrease in sound level Excessive wow or flutter or sound drop out e Contamination of the capstan or pinch roller Insufficient erasure e Dirty erase head Unbalanced tone in higher frequencies The DOLBY NR switch is set incorrectly During playback set the switch i to the same position as that used when the tape was recorded e Set the TAPE type selectors to the appropriate position e The tape is wound completely Tumtable Operation Impaired tone quality e Dusty stylus e Worn stylus No audio from one channel e Loose connection of phono cord Groove skipping tonearm skating tonearm e Turntable is not level not advancing e Defective record Loud rumble or low frequency howl The turntable is subjected to external vibration e The turntable is placed too near the speaker No audio e Turn the VOLUME control clockwise Check the SPEAKERS select buttons setting e Check the MUTING switch setting No audio from one channel or unbalanced e Adjust the BALANCE control left and right volume e Check the speaker connections of the inoperative channel o Reversed left and right sound e Check the speaker cord connection and speaker location _ physical location or musical instruments Lack of bass sound or apparently imprecise e Check the speaker cord connection for proper pha
13. o pairs of speaker system should be connected Otherwise no sound can be heard For headphone listening only keep both buttons released 6 Forlower For higher SPEAKERS frequencies frequencies Cd BAND AUTO TUNING TUNING and or ON I OFF FM AM VOLUME FM or AM AUTO appears on the display window Select the band Select the station For lower For higher frequencies frequencies m Select the station Receiving Radio Programs You can memorize up to 25 FM and AM stations in any sequence Memory Preset 1 MEMORY For a lower For a higher frequencies frequencies TUNING Tune in the desired station mamn Enter the desired number e LEAL LMG a ABLES IE NONE NEE SEO ES i For lower For higher frequencies frequencies MEMORY SCAN TUNING PEPI AR ENTER ai Pe Sco D While the MEMORY indicator is lit The tuned station has been select a station number 1 or 25 memorized P L important e The MEMORY indication will go off after a few seconds If the MEMORY indication has gone off press MEMORY again e Storing a new station on a preset station number erases the previously memorized station Se ees To select a station number of two digits
14. powder or solvent such as alcohol or benzine Specifications AUDIO POWER SPECIFICATIONS POWER OUTPUT AND TOTAL HARMONIC DISTORTION With 8 ohm loads both channels driven from 20 20 000 Hz rated 100 watts per channel minimum RMS power with no more than 0 08 total harmonic distortion from 250 milliwatts to rated output 50 kilohms TUNER CD VIDEO TAPE Outputs REC QUT Votage 150 mV Impedance 1 kohms SPEAKER Accepts speaker of 8 to 16 ohms HEADPHONES Accepts headphones with low and high impedance Frequency response PHONO RIAA curve 0 5 dB TUNERI CD VIDEO TAPE 7 Hz 70 kHz 3 dB GRAPHIC EQUALIZER controls Boost cut range 8 dB 100 Hz 400 Hz 1 kHz 4 kHz 50 kilohms 6 dB 12 kHz Dimensions Approx 430 x 130 x 355 mm 17 x S4 e x 14 inches Weight Approx 8 2 kg 18 Ib 2 oz net ST JX285 System FM stereo FM AM superheterodyne tuner Quartz locked digital synthesizer system FM tuner section Tuning range 87 5 108 MHz Antenna terminals 75 ohms unbalanced 300 ohms balanced Intermediate frequency 10 7 MHz Sensitivity at 50 dB quieting 22 1 dBf 7 pV mono 42 1 dBf 70 uV stereo Usable sensitivity 19 5 dBf 5 uV IHF Signal to noise ratio at 75 kHz deviation 80 dB mono 75 dB stereo Harmonic distortion 0 3 mono 0 5 stereo at 1 kHz Separation 40 dB at 1 kHz Selectivity 55 dB at 400 kHz AM tuner section Tuning range 530 1 610 kHz Antenna AM loop antenna External an
15. sing Sony Corporation Printed in Japan
16. tenna terminal Intermediate frequency 450 kHz Usable sensitivity AM loop antenna 500 u V m 1 000 kHz Signal to noise ratio 54 dB 50 mV m Harmonic distortion 0 3 50 mV m 400 Hz Selectivity 38 dB 10 kHz Dimensions Approx 430 x 80 x 250 mm wih d 17 x 34 4 x 97 8 inches incl projecting parts and controls Weight Approx 1 9 kg 4 Ib 4 oz net Recording system 4 track 2 channel stereo Frequency response DOLBY NR OFF With TYPE IV cassette Sony METAL ES 30 15 000 Hz 3 dB With TYPE II cassette Sony UCX S 30 14 000 Hz 3 dB With TYPE I cassette Sony HF S 30 13 000 Hz 3 dB Wow and flutter 0 12 WRMS NAB Dimensions Approx 430 x 130 x 250 mm w h d 17 x 54s x 97 s inches incl projecting parts and controls Weight Approx 2 85 kg 6 Ib 6 oz net Tumtable Platter 30 cm 12 in Motor DC servo motor Drive system Belt drive Speed 3341 3 rpm 45 rpm Automatic system Return reject Tonearm type Statically balanced Cartridge Type Moving magnet type Stylus Sony ND 155G 0 6 mil diamond Dimensions U S A model Approx 430 x 95 x 350 mm w h d 17 x 35 4 x 137 s inches Canadian model Approx 430 x 105 x 350 mm w h d 17 x 44 4 x 137 s inches Weight U S A model Approx 2 5 kg 5 Ib 9 oz net Canadian model Approx 3 3 kg 7 Ib 5 oz net Power requirements 120 V ac 60 Hz Power consumption U S A model 175 W Canadian model 385 VA AC outlet 1 switched 100 W max
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