User manual TECHNICS ST-500L

Technics OUARTZ Synthesizer AM/FM Stereo Tuner ST-500 OUARTZ Synthesizer LW/MW/FM Stereo Tuner ST-500L OPERATING INSTRUCTIONS · These instructions also apply to units of different color. Before operating th is unit, please re ad these instructions completely. We want to thank you tor selecting this product and to welcome you to the growing family of satisfied Technics 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 convenient reterence. These Operaling Instructions are applicable 10 models ST·500 and ST·500L. The functions which differ for the two models are indicated in the Operating Instructions. Contents - Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. - Before Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -Suggestions for Safety. . . . . . . . . . . . . . . . . . .. - Connections .............................. - Front Panel Controls and Their Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2 2 3 4 -Memory Presettings .................... '" - Listening to Radio Broadcasts .. . .. .... -Maintenance .............................. -Technical Specifications. . . . . . . . . . . . . . . . . .. -Troubleshooting Guide .................... 6 8 9 9 10 5 Accessories · AC power supply cord. . . . . . . . 1 (Reler to page 4.) · FM indoor antenna. . ... . .. 1 · AM loop antenna ... . . . . . . . . . 1 · Stereo connection cabie. . . . . . 1 · AM antenna holders. . . . . . . . . . 2 ·Screws ..................... 2 ~ ~(B) ~(A) Note: Conliguration ol AC power supply cord and FM indoor antenna dilIers according to area. Before Use Be sure to disconnect the mains cord belore adjusting the voltage selector. Use a minus (-) screwdriver to set the voltage selector (on the rear panel) 10 the voltage setting lor Ihe area in which Ihe unit will be used. (11 Ihe power supply in your area is 117 V or 120 V, set 10 the "127 V" position.) Note that Ihis unit will be seriously damaged il Ihis setling is not made correctly. (There is no voltage selector lor some countries; 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 STEREO SIGNAL ONL Y IN AM MONO. WHICH, IN EFFECT. IS OF NO LESSER QUALITY THAN YOUR EXISTING AM MONO TUNER/RECEIVER -2 Suggestions for Safety · Use a standard electrical AC wall outlet 1. Use from an AC power source of high voltage, such as for air condItIoners, Is very dangerous. Be extremely careful not to make a connection to the elec trical outlet lor a large air conditioner or central-heating unit which uses high voltage, because there is the possibility ol lire. 2. A DC power source cannot be used. Be sure 10 check Ihe power source carelully, especially on a ship or other place where DC is used. · If water is spilled on the unit Be exlremely careful il water is spilled on Ihe unit, because a lire or serious electric shock might occur. Immediately disconnect the power cord plug, and consult with your dealer. x · Place the unit where it will be weil ventilated, and away from direct sunlight Place this unit at least 10 cm (4") away Irom wall surfaces, etc., and away Irom direct sunlight. · Connection and removal of the power cord plug 1. Wet hands are dangerous. A dangerous electric shock may result il the plug is touched by wet hands. 2. Don't pull the power cord. Always grasp the plug; never pull the cord itselt. x · Keep the unit away from heaters, etc. Heat can damage the external surfaces as weil as internal cir cuits and components. x · Never attempt to repair or reconstruct this unit A serious electric shock might occur il th is unit is repaired, disassembied or reconstructed by unauthorized persons, or il the inlernal parls are accidently touched. x · Avoid spray-type insecticides Insecticides might cause cracks or "cloudiness" in the cabinel and plastic parls ol Ihis unit. The gas used in such sprays might, moreover, be ignited suddenly. x · For families with children Never permit children to put anything, especially metal, inside th is unit. A serious electric shock or malfunclion could occur il ar ticles such as coins, needies, screwdrivers, etc. are inserted through the venlilation holes, etc. ol th is unit x · Turn oft after use II the unit is lef! lor a long time wilh the power on, this will not only shorlen its uselul operation lile, but mayalso cause other unex pected trouble. · Never use alcohol or paint thinner These and similar chemicals should never be used, because they may damage the linish. x · If trouble occurs It, during operation, the sound is interrupted or indicators no longer illuminate, or il abnormal odor or smoke is detected, im mediately disconnect the power cord plug, and contact your dealer or an Authorized Service Center. x~ .' I P9Wer 61 3 Connections Note: An outdoor antenna should be installed by a competent technician only. The indication AM used here includes both MW and LW lor Model ST-500l. FM ouldoor antenna (option) FM indoor antenna (included) (Necessary in mountainous regions, inside reinforced-concrete buildings, etc.) Tack or tape /'/ i: ,.JJ., (.~-" 75-ohm coaxial cab Ie (option) i · Attach to a wall (using tack or tape) facing in direction of best reception. · Tack should not contact internal antenna wire. · For best reception sound quality, an FM outdoor anten na is recommended. · Disconnect th is antenna if an FM outdoor anten na is in stalled. Control input terminal (CONTROL INPUT): This terminal is used for the connection of a timer for the purpose of controlling the tuner by means of an external control signal. ." ..-~ Household AC outlet AC power supply cord (included) Configuration of AC power supply cord differs according to area. (included) (option) 1I FM antenna terminal is as shown belOW: 1 Stereo connection cable (included) "--~..:::..~~~~~~~~~C~~~~· (L) To tuner input terminals (R) of the amplifier [J'" LJBJ:=t J ) 20 mm (25/32 10 mm (3/8 ) T~ or tape or ~'~( ~ l I - AM loop anlenna If th is antenna is not properly instalied, AM broadcasts will not be received. Be sure to connect the AM loop antenna even when an outdoor antenna is used. --- Clamp Shield braid Center conductor Be sure the shield braid contacts the clamp. AM ouldoor antenna 5 ~ 12 m (16 ~ 40 ft.) (Necessary in mountainous regions, in side reinforced-concrete buildings, etc.) Use5 - 12m(16 - 40 ft.) of vinyl covered wire horizontally at the window. 'nyl-covered wire (option) Installalion of Ihe AM loop anlenna 1. Pay attent ion to the following points when attaching the anten na. · Do not attach it horizontally (to do so would impair recep tion). · Do not attach it close to metal surfaces (to do so would result in noise). · Do not attach it close to power cords, speaker wires, etc. (to do so would result in noise). · Do not attach it close to a tape deck (when the tape deck is being used, chirping or beeping sounds may be received). 2. Connect the AM loop antenna to the AM 3ntenna terminals located on the rear panel of the unit. When attaching the antenna to a wal!, column or rack Find the height and direction of the anten na where reception is best and then fix it vertically to the wall, rack, etc. When attaching the antenna to the unit - - - , This type of installation may cause impaired recept ion or result in signa I noise. If possible, attach the antenna to the rack, a wall, or a column. Move the anten na toward the right or left to find the point of best receptio . ll AM loop anten na (included) Column AM anten na holder (A) (included) J~ i6 ,",,~. i _,.~.I> AM loop antenna (included) -4 Front Panel Controls and Their Functions Power "stand by eb, on" switch This switch turns on and olf the secon dary circuit power only_ The unit is in the "stand-by" condition when this switch is set to the "stand by ó" position. Regardless ol the switch setting, the primary circuit is always "live" as long as the power cord is connected to an elec trical oullet. The indication AM used here includes both MW and LW tor Model sT·500L. I FM MW LW Band selectors (band) - - FM: Press th is button to listen to an FM broadcast. AM: Press this button to listen to an AM broadcast. allocation: This bulton is also used to select a Ire quency step of either 9 kHz or 10kHz. When the AM button is pressed for about 4 seconds, the AM Irequency step wil! change to 10kHz per step. (This slep is set to 9 kHz belore ship men!.) Sel to the appropriate posilion lor your locality. In order to relurn to the original Ire quency indication, press this button lor about 4 seconds again. Band selectors (band) FM: Press Ihis button to listen to an FM broadcas!. MW: Press Ih is bulton 10 listen 10 an MW broadcast allocation: This button is also used 10 select a frequency step ol either 9 kHz or 10 kHz. When the MW button is pressed lor about 4 seconds, the MW Irequency step will change to 10 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 indica tion, press this button lor about 4 seconds again. Memory indicator (memo) This indicator illuminates when the memory bulton is pressed. FM stereo indicator (stereo) This indicator automatically illuminates wh en an FM stereo broadcast is being received. LW: Press this button 10 listen 10 an LW broadcast. freq shift: When Ihe LW bullon is pressed for aboul 2 seconds during reception ol an LW broadcast, the LW Irequency will decrease by 2 kHz. So, for example, 10 receive 153 kHz, lune 10 155 kHz, and then press this button. In order to return 10 the original Irequency indica tion, press this button lor about 2 seconds again. Note: It will not illuminate il the FM mode selector is set to the monaural mode. Digital frequency display The recept ion Irequency of the FM or AM broadcast selected by using the tuning buttons or the preset-tun ing buttons is indicated by a digital-type display. ST·500 Channel display - - - - - - - ' " The channel number selected by the preseI tuning buttons is displayed. These buttons are used lor tuning to the desired broadcast station. Quartz·lock indicator (quartz loek) This indicator illuminates when tuned precisely to an FM or AM station. Memory button (memory) - - - - - " This button is used when preset memory setting ol the preset-tuning buttons is made. Signal-strength indicators (signal) _----' These indicators show the relative strength of broadcast signals being received by the anten na. The best condi tion lor reception, lor FM and AM, is when the indicators illuminate completely to the top. FM mode selector (FM mode)--..;/ This unit automatically switches into the stereo mode wh en a stereo broadcast is received. Press this button to listen in the monaural mode. The stereo indicator will not illuminate in the monaural mode. Preset-tuning buttons (1 - 16) (16 channel random preset tuning) These bultons are used to preset FM and AM broadcast Irequencies into the memory ol this unit, and are also pressed to select the desired preset Irequencies. Note: Reler 10 pages 6 and 7 for inlormation concerning preset memory. 5 Memory Presettings Importantl----------------- II this anten na is not installed, AM broadcasts will not be received, AM lOOp antenna The indication AM used here includes both MW and LW for Model ST·500l. With th is unit you may preset as many as 16 radio broadcast sta tions: FM/AM random presetting, After broadcast stations have been preset as described below, any desired station can be quick Iy and easily selected by simply touching one button Notes: 1. For automatic presetting in areas where there are Iess than 16 FM stations, the remaining channels (through channel 16) wil! be lelt empty. The empty channels can be lilled by using manual memory presetting. 2 II a new broadcasting station is preset into a channel, the broadcasting station which was previously entered in that channel will be automatically erased, 3. For AM broadcasts with extremely strong signa I transmis· sions, the frequency memorized may be slightly different Irom the correct frequency, If this occurs, use the manual control to memorize. Automatic memory presetting The FM broadcasting stations and AM broadcasting stations will be automatical!y preset to "channels" 1 through 16 lor FM and 9 through 16 lor AM, respectively, The FM broadcasting stations, MW broadcasling stations, and LW broadcasting stations will be automatically preset in "channels" 1 through 16 for FM, 9 through 16 for MW, and 13 through 16 for LW, respectively. Note: When AM is automatically preset, Ihe FM stations on "channels" 9 through 16 wil! be replaced by the new AM stations, "on" ( I - __ ) Channel display Memory indicator "FM": "AM": lor FM broadcasts for AM broadcasts "FM": for FM broadcasts "MW": lor MW broadcasts "LW": for LW broadcasts Before presetting the broadcasting stations, press to select the appropriate frequency step for your locality, (Reler to page 5.) 5 Confirm the names (call signs, etc.) of the broadcasting sta· tions which are preset to each channel, and enter them on the file sheet (page 8). 3 Set to the lowest frequency. Tuning Press the left button to change the Irequency downward, and press the right button to change the frequency upward. -FM: 87.50 MHz -AM: 522 kHz (9 kHz step) or 530 kHz (10 kHz step) · To check the front channels (CH 1 - 8) Press momentarily, o~ Frequency stored in the memory and channel number are displayed, Pu1 - FM: 87.50 MHz -MW: 522 kHz (9 kHz step) or 530 kHz (10 - LW: 153 kHz (- 2kHz shift) or 155 kHz .1 kHz step) ... Press the button and hold slightly (frequency wil! change con tinuouslYl· 2 .... _~-- 0-' wl:J. 'UMHICI', ,r, 3: Release it when approaching the above exact frequency, and then press Ihe button again momenlarily (frequency change will stop) · To check the back channels (CH 9 - 16) Press slightly longer. ',t Press the button momentarily (Irequency wil I change each time Ihe button is pressed), and tune 10 one of the above Ire quencies . L% .' 1< ,'",,_-i;;'r~,;' * · · Ofu · C3/0~ 'r% 2:Q~ Frequency stored in Ihe memory and channel number are displayed. 4 Press. When the frequency indication begins to change, release. The frequency will change upward, and the automatic presetting wil! begin with Ihe next broadcasling station, It will continue 10 preset consecutive broadcast stations. (J.g, -6 · "Most·recent" memory The most-recent memory is a system by which the unit "remembers" the FM or AM broadcast station last heard when th is unit is turned olf, and automatically tunes to that station the next time the power is turned on. · To prevent erasing the memory 1I the power supply is interrupted lor one week or longer, the memory settings will be erased. For example: 1) If the power cord is disconnected from the electric outie!, 2) If an audio timer is used and the timer does not operate the tuner for a week or longer, 3) If a power failure occurs, etc . If any of the above occurs, the memory will have to be reset. The memory in th is unit is maintained by a gold capacitor. If the power supply is interrupted for a week or longer, set the power switch of the tuner to the "on" position for thirty minutes or more in order to recharge the gold capacitor. Then reprogram the memory (pages 6 and 7). · "Back·up" memory This is the function which preserves the preset memory and most-recent memory functions. In the event of a power failure, or if the power cord of the tuner is disconnected from the electric outlet, the back-up memory will preserve the preset memory and most-recent memory functions for as long as approximately one week. I Manual memory presettfng Stations can be freely preset to any desired channel. 1 "on" (I-.OL) 2 Channel display "'1"'1.I;ID "FM"·. ----. -- "AM": for FM broadcasts for AM broadcasts _'1"'1 111, _ --_·· ] - "FM": for FM broadcasts "MW": for MW broadcasts "LW": for LW broadcasts Before presetting the broadcasting stations, press to select the appropriate frequency step for your locality. (Refer to page 5.) Memory indicator 5 While the memory indicator is iIIuminated, press the button of the desired channel. When the button is pressed, the memory in dicator illumination will stop, and the preset ting is complete. 3 Press the appropriate tuning the desired broadcast. Tuning Press the left button to change the frequency downward, and press the right button to change the frequency upward · Automatic tuning Press the button. When the frequency indication begins to change, release the button (a broadcasting station will be selected automatically). Repeat this operation until the desired station is found. · Manual tuning Press the button momentarily and tune to the desired station. The frequency will change each time the but ton is pressed. · To preset channels 1 through 8: Press the appropriate button momentari Iy, and then release. (Preset channel number is displayed on the channel display.) · To preset channels 9 through 16: Press the appropriate button slightly longer, and then release. (preset chan nel number is displayed on the channel display.) Note: If the memory indication illumination stops before you press the button, once again repeat step 4 and then step 5. 4 Press momentarily, and then (The memory indicator will illuminate for approx imately 4 seconds.) 6 Enter the name (call sign, etc.) of the preset broadcasting station on the station memory file sheet (page 8). This completes the procedures for presetting radio broad cast frequencies. The other preset-tuning buttons can be preset in the same way by following steps 2 through 6. Note: If the button is pressed continuously, the frequency will begin to change, and the memory will be preset automatically. To stop the automatic memory presetting, once again press either the "llP" button or the "down" but ton. -7 Listening to Radio Braadcasts Have you completed the memory presetting (page 6 and 7)? Important!-----------------.. If this anten na is not installed, AM broadcasts will not be received. AM loop antenna 1 Turn the amplifier on, and set it for listening to radio broadcasts. 2 3 "on" ( · - ... ) Select the desired station by using either the manual or preset·tuning buttons. For station setection using preset~tuning buttons · To select the front channels (CH 1 - 8): Press Frequency stored in the momentarily. ~ memory and channel number are displayed. · To select the back channels (CH 9 -16): Press slightly Frequency stored in the longer ~ memory and channel number are displayed. ï :,...., '!...!...I k.Hzch ~ Ol For manual station selection. Follow step 2, 3 of "Manual memory presetting" on page 7. .~ - ~ ~ --~- _ _ ......- &_1& _ ._ r~~~-- .. - ! .t_tI j .2_10 I 3_11 I -4_12 ! 6_13! .6_"! 7_15! I ·~iiii:._· . - - - - . g _ .. _. ~4 ~i'P 5T·500 ~ .::::::::::,:;;;:;: ~~~w §j bau:: .. · · · 1 ··.4 FM mode selector (FM mode) _ - - - - - - . . / If the broadcast signal is weak, or if there is a large amount of in· terference in a stereo broadcast, set to the monaural position. Note that the FM stereo indicator will not illuminate in this posi tion. Station Memory File Sheet CH.1 CH.2 CH.3 CH.4 CH.5 CH.6 CH.7 CH.8 CH.9 CH.10 CH.11 CH.12 CH.13 CH.14 CH.15 CH.16 -8 Maintenance To clean this unit, use a soft, dry cloth. II the surlaces are extremely dirty, use a solt cloth, dipped into a soap-and-water solution or a weak detergent solution. Wring the cloth weil before wiping the unit. Wipe on ce again with a soft, dry cloth. Never use alcohol, paint thinner, benzine, nor a chemically treated cloth to clean this unit. Such chemicals may damage the linish of your unit. I Technical Specifications (DIN 45 500) · FM TUNER SECTION · AM (MW) TUNER SECTION 522~1611 Frequeney range 87.50~108.00 MHz (0.05 MHz step) Sensitivity 1.5 J,N1750 (IHF '58) SIN 30 dB 1.3 j.1V (750) SIN 26 dB 1.2j.1V (750) SIN 20 dB 0.9j.1V (750) IHF 46 dB slereo quieting sensilivily 22 j.1V/750 Tolal harmonie dislortion MONO 0.15% STEREO 0.3% SIN MONO 70 dB (78 dB, IHF '58) STEREO 65 dB (70 dB, IHF '58) Frequency response 20 Hz~15 kHz, -0.5 dB~-1.5 dB Allernale channel selectivity normal :::400 kHz 65 dB Capture ratio 1.0 dB Image rejection at 98 MHz 40dB IF rejection at 98 MHz 70 dB Spurious response rejection at 98 MHz 70 dB AM suppression 55 dB Stereo separation 1 kHz 40 dB 10 kHz 30 dB Carrier leak 19 kHz -30 dB (-35 dB, IHF) 38 kHz -45 dB (50 dB. IHF) Channel balanee (250 HZ~'6,300 Hz) .5 dB Limiting point 1.2 j.1V Bandwidth IF amplifier 180 kHz FM demodulator 1000 kHz Antenna terminals 750 (unbalanced) Frequeney range Sensilivily (SIN 20 dB) Seleclivily (+9 kHz) Image rejeelion al 999 kHz IF rejeclion al 999 kHz 530~1620 kHz (9 kHz-steps) kHz (10 kHz-steps) 20 I.N, 3001.Nlm 55 dB 40 dB 60dB · LW TUNER SECTION (ST-500L only) 155~353 kHz kHz (2 kHz shilt) 50 j.1V 55 dB 40 dB 60 dB Frequency range 153~351 Sensitivity (SIN 20 dB) Selectivity at 254 kHz Image rejection at 254 kHz IF rejeetion at 254 kHz · GENERAL Output voltage 0.3V (O.6V, IHF) Power eonsumption 9W Power supply For Australia AC 50 Hz/60 Hz, 240V For continental Europe AC 50 Hz/60 Hz, 220V For others AC 50 Hz/60 Hz, 11 OV/127V1220V/240V Dimensions (WXHXD) 430 X 53 200 mm (16-15/16" X 2-2/32" X 7-27/32") Weight 1.8 kg (3.9 lb.) Note: Total harmonie distortion is measured by the digital spectrum analyzer (H.P. 3045 system). 9 Troubleshooting Guide Belore requesting service lor th is unit, check Ihe chart below lor a possible cause ol the problem you are experiencing. Some simple checks or a minor adjuslment on your part may eliminate Ihe problem and resto re proper operation. 11 you are in doubt about some ol the check points, or il Ihe remedies indicated in Ihe chart do not solve Ihe problem, reler to the directory ol Authorized service centers (enclosed with th is unit) to locate a convenient service cenIer, or consult your Technics dealer for instructions. Probable cause(s) Suggested remedy Nearby building or moun n. (Mulli-path distortion is being caused by the mutual interference of broadcast signals received directly from the transmitting station (direct waves) and signals being reflected Irom nearby buildings or mountains (reflected ning buttons ol th is unit have not · Try reducing the treble sound by turning Ihe treble lone con trol ol the amplilier. · Set the FM mode selector to the mono position. (Note that the broadcast will then be heard as monaural sound.) · Try changing the location, height and/or dirèction ol the anten na. · II an indoor anten na is being used, change to an outdoor antenna. · T usi an anten na with more elements. · Try changing the location, height and/or direction ol the antenna. · II an indoor anten na is being used, change 10 an outdoor antenna. · Try using an antenna with more elements. · minutes or more to perlorm the charging, and then make the memory presetting again. 10