Grundig-TK830-tape-sm维修电路原理图.pdf

PnoroFAcr- FolJ. rl gsf Hs Ct lrJ tr- (/l ln J |Ilr rg =g 9l- E$ -fil (o =r 9d o() 49 - - 4- o GENERAL I NFORMATION Grundig Majestic ModelsTK830, TK830E, and TK830U taperecorders canrecord andplay back on l/ 4 tape. The two-track systemis employed so that thefull length of tapemay beused twice. The recorders can record and play back in both directions. Tape speeds are 1 l/ 2 and 3 3/ 4 ips, giving a playback time of approximately one hour for standardtape at 7 L/ 2 ips and two hours at 3 3/ 4 ips. Electromagnetic changeover from Track I to Track II takes approximately 1. 5 seconds at l i/ 2 ips and less than one second at 3 3/ 4 ips; thus, virtuallycontinuous track-to-trackrecording canbe made. Threetypes of high-impedance input connections with push-button selection are avallable. Two recordingand twoerasing headsare used, offset forthe respectiveTrack I and Track II positions. The Trick button (Loudspeaker/ Eraser Cut-out button), together with the Temp- orary Stop/Safety button and Recording button depressed, enables a second recording to be superimposed upon a previous recording. Supplied by: Majestic I nternational Sales Corporation 743 West La Salle Street Chicago 10, lllinois o aF *g 6d (.) g 96 i= OD GJb r$ f! 6= G) fi e5 L ltt F (a GRUNDIG MAJESTIC MODEI.S TK83O. TK83OE. TK83OU This moferiol compiled and pvblished by HOWARD lA/. SAfrrS 117 (110-127), 150, 200, 220, and 240 volts Consumption: Approximately 85 watts Consumption: At b0 cps, approximatelY 90 watts. At 60 cps, approximately 100 watts. 5 x 20 mm, Din 415?1, surge resisting. AC fusesl U? volts-l.6 ampsl 150 volts-l.25 amps; 200-240 volts-l.0 amp. HT fusel 0.125 amp. TK830V60 cps Suitable for 60 cpe AC only; 1l? (110-12?), 150, 200, 220, and 240 volts. Approximately 65 watts Fuseg: 5 x 20 mm, Din 415?1, surge resisting. AC fuses; l1? volts-I.6 amps; 150 volts-l._ amps; 200-240 volts-l.0 amp. Microphonel l. 5 millivolts/ 300K, contact I of Fuses: lnput socket. 5 x 20 mm, Din 415?1, surge resisting. AM-FM tunerl 5mi1livolts/250K, contactlof AC fusesl ll?volt-.2b amps; lbO volts-.0 lnput socket. amp; 200-Zl0V-.09 amps. Radio-TV-Phono; 100 millivotts,/ lmeg, contact HT fuse; 0. 12b amp. 3 of input socket. TK83OU External speakerl 12 ohms, contact 1 of output AC voltages: socket- Suitablefor 50and 60cps, convertibte. AConlv Amplifler;0.6vo1t/ 5K, contact3ofoutputsocket 11? (110-12?) 150 200 220 and 240 volts 7 /2 ips-130 seconds Automatic Stop Swttch: Electromagnetic Tape Run System: Recordingandplaybackin bothdirections, oper- AC Voltages: ated by track buttons. Frequency Range: At 7 l/ 2 ips-50 to approximately 15r 000 cps Consumplon: At 3 3/ 4 ips-50 to approximately 10,000 cps Recording Level Indicator: Magic eye Remote Control: PAGE 2 Foot svritch222 for start, stop, and backspacing HT fusel 0.125 amp. RadioFans.CN 收音机爱 好者资料库 o n c z E Io 3 D r ttt ta =n 3 o ( ll| F la o G o x o G,t o IlI x o G o c FIG. I TOP VIEW OF MECHANISM WITH TOP PLATE REMOVED. FUNCTION OF CONTROLS Speed Switch Set the Speed swltch before the recordlng is started, although its positlon can be altered while the tape ls moving. Never switch durlng fast renrind from fast (? / 2 ips) to slow (3 3/ 4 ips) tape speed. How- ever, swltching from slow to fast speed is possiblel to the rlght for 7 l/ 2 ips, to the left for 3 3/ 4 ips. Recording Level Control . TheRecordlng Level knob controlsthe qualityof the recording. lnput Selector The three discs on the left side of recorder are used to select any one of the three different inputs. The marking above the buttons corresponds to the appropriate sockets at the back of the recorder. Any or all of the lnput leads can remain connected to the input socket at the rear of the recorder at all tlmes. To select one of the lnputs, pull the notch of the disc forward. A white fietd indicates the on positlon, a red fleld, the off posltion of the particular input selectlon. The input selector does not function during playback. Volume Control 0n-Off Switch The Off position is marked by a red dot. During recording, this control ls used for monitoring and for adjusting the volume in the buitt-in speakers or ear- phones. During playback, this switch controls the volume. Tape Counter The tape counter reglsters rt000t to 999. The readlng may be noted while recordlng, ild reference to any glven polnt on the tape may be rapidly made. After a recorded tape has been logged or referenced, always zero the indicator before playingthe recorder and before the tape ls threaded on the reel. Multi sonic Tone Control The Multisonic tone control ls used only when playing back through the built-in speakers or through an external speaker. The left-hand disc of the Multi- sonic tone control emphaslzes the bass boost, the right- hand disc, the treble boost. By means of the middle dlsc, all notes between thetwo extremitiesof the bass and treble notes are controlled. .Tl o I rrt n l.tl PAGE 3 RadioFans.CN 收音机爱 好者资料库 FIG. 2 FROM VIEW OF MECHANI SM Stop Bar TtreStop bar stopsthe motor and returns all de- pressed buttons except the track buttons to neutral. Safety Button/Temporary Stop Button This button prevents accidental erasure. Moving the depressed Safety button slightly forward locks it. The tape will not move until this button is released. The same button also serves as a temporary stop, halting the recorder ineither record or playback only as long as the button is depressed. Trick Button- Speaker Control The Trick button permlts blending of voices, sound effects, or music into previous recordlngs. The same button also cuts off the speakers. Depress- ing the button switches off the built-in-speaker. De- pressing and moving the button slightly forward will lock it. Recording Button The Recording button is used with the Safety button to place the recorder in the Record position. Playback Button fire Playback button places the recorder in the Playback position. PAGE 4 Track ll Button The Track II button starts the recorder operating on Track II, with the tape moving from right to left. The recorderwill either recordor play back, accord- ing to which button has been depressed. Track I Button Same as Track tr button, excepttape moves from left to right. Fast Wind Buttons These two buttons are used to find thebeglnning of aparticular recording. They startthe reelsturning rapidly. The entlre tape can be wound from one reel to the other in approximately two mfulutes, NOTE: If eitherFastWind buttonsare in use, theStop bar must be depressed before changing functions. In other words, dont go from Fast Wind to Re- cording or Playback withoutfirst depressingthe Stop bar. When using either of theee buttons, depress and release them immediately. Voltage Selector To set the voltage selector to another voltage, pull out voltage tappingplug (83) in voltage setector (84) and reset so that the voltage closest to the power supply voltage is visible in the tiny window of voltage tapping plus (83). RadioFans.CN 收音机爱 好者资料库 FIG. 3 REAR VIEW OF MECHANISM OPERATI NG I NSTRUCTIONS o JF e2 6rE 96 *= oD GJE F5 fl d= Hg f- El F la Threading the Tape l. Tworeels aresupplied, one full andthe other empty. 2. The full reel fits on the left-hand spindle, the empty one on the right. 3. Hold full reel in left hand with loose end of tape hanging down left side of reel. Now place the reel on the left-hand spindle. Trrn the reel slightly until lt falls into place and is held securely by the ridges on the spindle. 4. Place empty reel on right-hand spindle. 5. Placetape into soundchannel andslip thefree end lnto slot in empty reel. Trrn empty reel counterclockwise until tape is secured to reel. N0TE: : The tape has a shiny and a dult slde. Always be sure the shlny side faces the buttons. Turning Recorder 0n Once the voltage selector has been adjusted to agreewlth rating of wall receptacle, the recordermay be pluggedin. Trrn Volume Control/On-Off switch to the right. After a few seconds (while the tubes warm up), the recorder is ready to record or playback. To Record from Microphone l. Depress Track I button. 2. Depress the small Safety button on the left of the Recording button and then depress the Recording button. Keep Safety button de- pressed (or locked). Set Volume control to low level. 3. Talk into microphone, holding it about lg in- ches from the mouth. The Magic Eye will start to flutter. Adjust Record Level control until Magic Eye just closes on the loud parts of speech. If the Volume control is too high, the recording will be distorted. 4. Release Safety button. Tape will move from left-hand to right-hand reel, and any sound entering the microphone will be recorded on tape. NOTE: To switch tothe second track, ddpress Track II button. The tape will move in the opposlte direction, and the recording can be continuedon other half of tape. To Record f rom AM-FM Radio, 1. Connect lead 23? to tape recorder socket of radlo and to input socket of tape recorder marked AM-FM Tuner. 2. Operate middle input selector wheel. 3. Depress and lock Safety button. Depress Record button and tune accurately to broad- casting station. Tr o c7 m n rr PAGE 5 RadioFans.CN 收音机爱 好者资料库 3 t I m iI I ffi i- I I i Ir t tt, n *. :!I qI U dr*- rt ! $! tt t, I It f: i ,tI 6,.t il I n bd, FIG. 4 BONOM VIEW OF MECHANISM 4. Trrn Recording Level control clockwise un- tilthetwo sectlonsof green lightof the Magic Eye just begln to meet at the loudest passages. 5. Rel.ease Safety button. 6. At end of recording, depress Stop bar and mark the reading of the tape corurter. NOTE Lead 23? has 3-way ptugs on both endsl there- fore, the radio must have a correspondin!socket for proper connection. See Tnstalling Soiketfor Connecting Tape Recorder to Radio. i To Rmord from Phonograph l. Connect the leads from the pickup arm of record player to the red and btack banana plugs of connection lead 238. 2. Connect the 3-prong plug to socket marked Radio-TV-Phono or recorder. 3. Fasten the ground of the pickup to the sleeve of the plug. 4. Operate outside lnput selector wheel. 5. Start the record player. 6. Place recorder in Record position. PAGE 6 To Record a Telephone Conversation The Grundig TelephoneAdaptor 243T is a small coil htdden in a plastic case. Thls coll picks up the magnetic field from the coils wtrich form part of alt telephones. With the coll, both incomlng and outgoing conversatlons can be recorded. fireplugof the adaptorftts intothe socket marked AM-FM Trner. Slighily molsten the rubber dlsc on the bottom of ,the Adaptor-to lmprove its sticking power, and press onto the telephone. Dlfferent tlpes of telephones requlre a dlfferent position of the Adaptor. Ilere is how to find the best position for each tlpe: 1. Plugthe Adaptor lntothe socket marked AM_ FM Ttnerat rear of recorder, and swltch on recorder. 2. Proceed as for recordlng, dtr the AM-FM Trner disc (middle selector) selected. Trrn RecordlngLevel eontrol to a convenient level. Liftthetelephonereceiversothat thedialtone can beheard. MovetheAdaptor slowlyaround thebaseof the telephone, with the rubberdisc just touching the telephone. The Magic Eye wiil oscillate, and the dial tone will be heard tlrough the speaker. Do not forget to adJust the monltor control. When the Magtc Eye RadioFans.CN 收音机爱 好者资料库 registers lts madmum deflection and the dial tone is loudest, the best posltion has been reached. Fastenthe Adaptor to the telephone at thls polnt. NOTE: The Adaptor ls sensitive to all klnds of mag- netlc fields and should be used at least four and one-half feet from the recorder. IMPORTANT: : It ts against the law to record a tele- phone conversatlon, except under certaln con- ditlons. See your local authorities about tlese condltions before recordlng a conversation. Never record a conversation wtthout tte caller s permleslon urder any clrcumstances. To Play Recordings l. fitread tape as described rnder Threading Tape. 2. Set the two-speed selector knob to the speed at whlch the recordlng was made. 3. Depress the Playback button. 4. AdjustteVolume control andturn thewheels of the Multisonlc tone control for desiredtone level. Automatic Stop Metal fotls at both ends of the tape automatically swltchoff the motor. Ttre motor is switched off at the end of each track whether the recorder is recording, playingback, orfastwinding. To start tapeagain after the motor has been switched off by the metal foils, depress the track button (which is already depressed) further. High-Speed Fast Wind Toplayacertain portlonof tape agaln, the entire reelneed not berewound. Depress thecorrect button, dependlng on which direction the tape must be trans- ported. The Fast Wtnd (right to left) button is next to theTrack I button, andtheFastWlnd(left to rlght)but- ton is next to the Trick Button-Speaker control. To Edit and Splice Tape NOTE: Shce one track cannot be edited and spliced without affecting the other track, recordings to be edited should be llmited to one track only. 1. The tape may be edited by cutting out unwanted portions or by ioining selections into another sequence. Annormcements, etc., may be in- serted between selections. Unused sections of tape can be spliced for re-use. 2. Forbestresults, cuttape at aslight diagonal, join ends with splicingtape on the glossy side, and trim any excess width. lnstalling Socket for Connecting Tape Recorder to Radio For high-quality recording from a radio, a worthwhite improvement may be obtained by feeding the recorder directly from the detector diode. This makes the level of a recording independent from the setting of the radio volume control and bypasses the distortion of the output stage. The diode connection consists basically of a potential divider, which should be mounted as close as possible to the radio volume control. If DC is present on the volume control, a blocking capacitor should be added in series. The value of 1-2 megohms is based on a radio delivering apporximatety 100 millivolts to the diode load. Where the voltage varies considerably from this figure, the value in megohms may be calculated by multiplying the voltage in volts by 17 (i. e. , 200 millivolts requires 3. 4 megohms). Flg. 5 shows the measurements for the cutout in the rear of the chassis. FIG. 5 REAR CHASSIS CUTOUT Fig. 6 shows the wiring. Both resistors are connectedtocontact 1(recording) of socket. Contact 2 is lead-to-ground connection of Volume control. For playback, contact 3 (playback) will be connected to phone socket. For this connection, use shield wire only if distance between connection points is large. Generally, the socket is ground by fastening it to the chassis, but the top of the socket housing can also be solderedto the chassis. Connectionlead 23?, equipped with 3-way plugs at both ends, is used to connect the tape recorder to the radio. The part number of the 3-way socket is No. 5784 (Din 41524. o tF a2 G,t El 96 *= OD GIL F5 fl d= ge LEt F UI T1 O (J m n rr FROM DIODE RESP. RATIO DETECTOR I RECORDING 2 GROUND 3 PLAYBACK FIG