Sony-TCFX45-tape-sm 维修电路原理图.pdf

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1、US ModelCanadian ModelDolby and the double-D symbol are the trade marks ofDolby Laboratories Licensing Corporation. Noise reductionsystem manufactured under license from Dolby LaboratoriesLicensing Corporation.SPECIFICATIONSRecording system 4-track 2-channel stereoFast-forward and rewind timeApprox.

2、 100 sec. (with C-60 cassette)Bias frequency 105 kHzSignal-to-noise ratio (NAB, at peak level)OFF B-TYPE ON C-TYPE ONTYPE IV (Sony METALLIC) 56 dB 65 dB 71 dBTYPE III (Sony FeCr) 59 dB 66 dB 72 dBTYPE II (Sony UCX) 56 dB 63 dB 69 dBTYPE I (Sony BHF or HFX) 54 dB 61 dB 67 dBTotal harmonic distortion1

3、.0% (with Sony METALLIC and FeCrcassettes)SAFETY-RELATED COMPONENT WARNING!COMPONENTS IDENTIFIED BY SHADING AND MARKA ON THE SCHEMATIC DIAGRAMS, EXPLODEDVIEWS AND IN THE PARTS LIST ARE CRITICAL TOSAFE OPERATION. REPLACE THESE COMPONENTSWITH SONY PARTS WHOSE PART NUMBERS APPEARAS SHOWN IN THIS MANUAL

4、 OR IN SUPPLEMENTSPUBLISHED BY SONY.AEP ModelUK ModelE ModelFrequency response DOLBY NR OFF? With TYPE IV cassette (Sony METALLIC)20 18,000 Hz30 - 16,000 Hz (3 dB), (DIN)30 - 13,000 Hz (3 dB, 0 VU recording)? With TYPE III cassette (Sony FeCr)20 - 16,000 Hz30 - 16,000 Hz (3 dB), (DIN)? With TYPE II

5、cassette (Sony UCX)20 17,000 Hz30 - 15,000 Hz (3 dB), (DIN)? With TYPE I cassette (Sony BHF or HFX)20 - 16,000 HzContinued on page 2-ATTENTION AU COMPOSANT AYANT RAPPORTA LA SECURITE!LES COMPOSANTS IDENTIFIES PAR UNE TRAME ETU N E M A R Q U E A SUR LES DIAGRAMMES SCHE-MATIQUES, L E S V U E S ECLATEE

6、S E T L A LISTE D E SPIECES S0NT CRITIQUES POUR LA SECURITE DEFONCTIONNEMENT. NE REMPLACER CES COMPO-SANTS QUE PAR DES PIECES SONY DONT LES NU-MEROS SONT DONNES DANS CE MANUEL OU OANSLES SUPPLEMENTS PUBLIES PAR SONY.STEREO CASSETTE DECKS O N Y :MICROFILMRadioFans.CN 收音机爱 好者资料库Wow and Flutter: 0.05%

7、WRMS (NAB)0.14% (DIN)Inputs: Microphone inputs (phone jacks)Sensitivity 0.25 mV (-70 dB)For a low-impedance microphoneLine inputs (phono jacks)Sensitivity 77.5 mV (-20 dB)Input impedance 47 k ohmsoutputs: Line outputs (phono jacks)Output level 0.44 V (-5 dB) at loadimpedance 47 k ohmsLoad impedance

8、over 10 k ohmsHeadphone outputOutput level -28dB at a load impedanceof 8 ohmsGeneralPower Requirements: AEP model: 220 V ac, 50/60 Hz(240 V ac adjustable by authorizedSony personnel)UK model: 240 V ac, 50 Hz(220 V ac adjustable by authorizedSony personnel)US, Canadian model: 120 V ac, 60 HzE model:

9、110,120,220 or 240 V ac ad-justable, 50/60 HzPower Consumption: 14 wattsDimensions: Approx. 430 x 105 x 275 mm (w/h/d)(17 x 4, x 107/s inches)including projecting parts and controlsWeight: US, Canadian, AEP, UK model:Approx. 4.4 kg (9lbs 12oz)E model: Approx. 4.5 kg (9 Ibs 15oz)(OdB=0.775V 11 Tape T

10、ransport Mechanism Type 1 TCM-130VlOFEATURESDolby NR C-type noise reduction systemIn addition to the conventional B-type Dolby NR system, thiscassette deck employs the newly-developed C-type Dolby NRsystem which reduces tape noise twice as effectively as the B-typesystem. The C-type system also inco

11、rporates an anti-saturationnetwork to improve the high-frequency dynamic range by 4 dB at 10kHz.Full-logic “feather-touch” operationAt the slightest touch, the “feather-touch” function buttons enableyou to switch directly from one mode to another without goingthrough the stop mode.Blank skip functio

12、nBlank spaces of at least 10 seconds long can be skipped in the fast-forward mode so that only the recorded portions of the tape areplayed back.Music scan functionThe first 10 seconds or so of all the selections on a tape can beplayed back in sequence. Thus the particular selection can belocated eas

13、ily.Repeat playPlayback of one side of the cassette can be repeated five times. Atthe end of the tape, the cassette deck will automatically go into therewind mode, and playback will be repeated from the beginning ofthe tape.AMS (Automatic Music Sensor)The AMS locates the beginning of the selection b

14、eing played, or thefollowing selection, by searching either forward, or in reverse, forthe blank space between selections, and then plays back the selec-tion automatically.Automatic tape select systemThe tape type is automatically detected and the recorder is ad-justed to its optimum bias current fo

15、r recording and the optimumequalization for both recording and playback by simply Insertingthe cassette in the cassette holder.Auto playThe auto play function makes automatic replay possible promptlyafter the tape is rewound to the beginning.Remote control operationUsing the optional RM-50, RM-51 or

16、 RM-80 remote control unit,various operations-recording, playback, AMS, record mutingoperation, etc.-can be remotely controlled. When the RM-65 syn-chro remote control unit is used to connect this cassette deck witha turntable equipped with a synchro remote control jack, the opera-tion of the casset

17、te deck and the turntable will be synchronized.Timer-activated recording or playbackA timer switch is provided to turn the deck on and off at timespreset on an optional timer.RadioFans.CN 收音机爱 好者资料库0 POWER switchThis turns the power on or off. The peak level meters illuminatewhen the unit is turned

18、on. REC LEVEL (recording level) controlsThese controls adjust the recording level. The upper slide bar is forthe left channel and the lower for the right channel.Tape COUNTER and RESET buttonThe tape counter provides a numerical reference point while record-ing which can be used to index a recorded

19、cassette. To reset tozero. press the RESET button.TAPE SELECT switch and tape type indicatorsGenerally set this switch to AUTO (n). The automatic tape selectsystem will then operate. When using a TYPE Ill (Fe-Cr) cassette ora TYPE IV (METAL) cassette which has no METAL tape detectorslots, depress th

20、is switch to set it to the TYPE Ill (IV) position (n).When Inserting a cassette, one of the tape type indicators will lightup depending on the type of tape and the position of the TAPESELECT switch.PEAK L E V E L M E T E R SThese meters show the peak input level of each channel duringrecording, and

21、recorded levels in the playback mode. They followthe transient peaks of high-level inputs that are too brief to befollowed by conventional VU meters so that the optimum recordinglevel can be accurately set.0 Function buttonsIt is possible to switch directly from one mode to another. The in-dicator l

22、amps on the buttons light to show the operating mode (ex-cept the 44, H and ? buttons).) (forward) button : Press this button to play the tape back. Torecord, press this button while holding the 0 button down.tl (rewind) button : Press this button to rewind the tape. Thisbutton is also used for “AMS

23、” and “Auto play”.AMS button : Press this button and the+4 or H button for AMSfunction.H (fast-forward) button : Press this button to advance the taperapidly. This button IS also used for “AMS”.w (stop) button : To stop the tape, press this button. The tape willstop automatically when it is complete

24、ly wound in either direc-tion.? (record) button : Press this button together with the) button tostart recording. Also press this button before adjusting therecording level.0 (record muting) button: Press this button to eliminate un-wanted material and to insert a blank space during recording.II (pau

25、se) button : To pause for a moment during recording orplayback, press this button. This button IS also used to controlmore precisely the start of recording and to release the recordmuting mode.TIMER switchYou can set the unit to record or play back at a predetermined timeby connecting any commercial

26、ly available timer. To record, set thistimer switch to REC. To play back, set it to PLAY.0 6 (eject) buttonPress this button to open the cassette holder0 HEADPHONES jackHeadphones may be inserted either to monitor the input signals tobe recorded or to listen to a recording in the playback mode.REPEA

27、T switchDepress this switch (P ON) to repeat the playing of one side of thecassette five times. Press it again (n OFF) to cancel repeat play.MUSIC SCAN/BLANK SKIP switchesThe ON/OFF switch on the left actuates and switches off the musicscan and blank skip functions and the switch on the right select

28、seither the music scan function or the blank skip function.Depress the left switch (-ON) and the right switch (P MUSICSCAN) to scan the first 10 seconds of all the selections.Depress the left switch (a ON) and release the right switch (nBLANK SKIP) to skip blank spaces representing more than 1 0seco

29、nds, during playback.DOLBY NR switchesThe left switch turns the Dolby NR* (Noise Reduction) system onand off and the right switch selects either the B-type or C-typeDolby NR system.To record with the Dolby NR process, depress the ON/OFF switchto the ON position and choose between B-TYPE (n) and C-TY

30、PE(=).To record without the Dolby NR process, press the ON/OFF switchagain to release.When playing back, set these switches to the same position usedin recording.For details about the Dolby NR system.* “Dolby” and the double-D symbol are trade marks of the Dolby Labora-tories Licensing Corporation.

31、Noise reduction system manufactured underlicense from Dolby Laboratones Licensing Corporation.I MIC jacksAny low-impedance microphone equipped with a phone plug maybe used. If your microphone is equipped with a mini plug, you willneed a plug adaptor.TROUBLE CHECKSThe following trouble checks will he

32、lp you correct the most com-mon problems encountered with a tape deck. Should any problempersist after you have made these checks, consult your nearestSony service facility.Before proceeding with these trouble checks, first check thesebasic points :? The power cord must be firmly connected.? Amplifi

33、er connections must be firmly made.0 Heads, capstan and pinch roller should be clean.? The amplifier controls and switches should be set correctly.The function buttons do not activate right after the POWER switchis turned on.0 Logic-controlled function buttons operate approximately 2seconds after th

34、e POWER switch is turned on.The 0 button and the ) button do not activate.? The cassette holder is not fully closed.The 0 button does not activate.0 No cassette in the holder.? The tab has been removed from the cassette.The automatic shut-off mechanism activates before the end of thetape.? The tape

35、is slack.? This situation may also be caused by a deformed cassette shell.Tape transport noise seems excessively loud in rewind or fast-forward mode.? This situation depends upon the cassette used and is not a prob-lem.Recording or playback cannot be made or there is a decrease insound level.? Conta

36、mination or magnetic build-up on the record/playbackhead.? improper connection.0 Improper setting of the amplifier controls.The AMS does not operate.? The blank space between the selections is less than fourseconds long.0 Severe noise or hum exists in the blank spaces.? A recorded selection is less

37、than 20 seconds long.The MUSIC SCAN and BLANK SKIP functions do not operate.The ON/OFF switch on the left of the MUSIC SCAN/BLANK SKIPswitches is released (OFF).Excessive wow or flutter or drop out? Contamination of the capstan or pinch roller.incomplete erasure? Contamination of the erase head.incr

38、ease of noise or erasure of high frequencies0 Magnetic build-up on the head.Unbalanced tone in higher frequencies0 improper setting of the DOLBY NR switches. When playing back,set the switches to the same position used in recording.0 Improper setting of the TAPE SELECT switch. Depress the TAPESELECT

39、 switch when using a TYPE Ill (Fe-Cr) cassette or a TYPE IV(METAL) cassette which has no METAL tape detector slots.Oscillation occurs when trying to record from microphones.? The microphone is too near the loudspeakers. Move themicrophone away from the loudspeakers or reduce the amplifiervolume.Hum

40、noise? The tape deck is stacked on or under the amplifier. Separate theunits.TC-FX45 SECTION 3ADJUSTMENTS3-1. MECHANICAL ADJUSTMENTSPRECAUTION1. Clean the following parts with a denatured-3.alcohol-moistened swab:record/playback headpinch roller4.erase headrubber beltscapstanidlers 5.2. Demagnetize

41、the record/playback head with ahead demagnetizer.Do not use a magnetized screwdriver for theadjustments.After the adjustments, apply suitable lockingcompound to the parts adjusted.The adjustments should be performed with therated power supply voltage unless otherwisenoted.lead Height Adjustment1. Pr

42、epare an adjustment cassette as shown below.C- 1Cur out hatchedtape cassetteportions.2. In playback mode and viewing from the front,adjust the head heights to eliminate tape curland tape twist at portions of the arrow.erase headrecord/playback>3-513-237-01 (t=O.l)3-513-237-11 (t=0.2)Shim, head he

43、ight adjustmentSoft Eject AdjustmentSpecificationSet the tape (C-90) and adjustthe adjustment screw so thatthe EJECT TIME is within thespecification.fastslowadjustment screwTorque Measurement 1TorqueTorque meterMeter reading28- 60gm-cmForwardCQlO2C (0.38 - 0.83 oz-inch)2.5 - 6g-cmBack Tension(0.03 -

44、 0.07 oz-inch)Fast Forward80 - 165 g-cmand Rewind(1.1 - 2.2 oz-inch)Pinch Roller Pressure Measurement- Playback Mode - Slowly return he pinch rollerand read the spring scale just whenthe pinch roller starts rotating.(The capstan shouldpinchroller0 tension gauge -14-3-2. ELECTRICAL ADJUSTMENTS Capsta

45、n motor Speed AdjustmentNote: The adjustment should be performed inthe order given in this service manual.The adjustments should be performedfor both L-CH and R-CH.Set the BIAS and EQ switches according to thetape as follows.gjcs-30 I Fe-Cr (METAL) III: Fe-Cr cs-40AUTOFe-Cr (METAL)IV: METALSwitches

46、and controls should be set as followsunless otherwise specified.DOLBY NR switch: OFFTAPE switch: AUTO (I: NORM)? Standard Record:Deliver the standard input signal level to theinput jack and set the REC LEVEL control toobtain the standard output signal level.Standard Input LevelMIC LINE INsource impe

47、dance 300 ohm 1Okinput level 0.77 mV (-60 dB) 0.25 V (-10 dB)Standard Output Level1 1 H E A D P H O N E S 1 L I N E O U T 11 load impedance 18nI4 7 k 11 output level1 31 mV (-26 dB) 1 0.435 V (-5 dB) I- 15-Procedure:Mode: playbackspeed checkerL FM-30digital ?Ferkquencvtest tapeWS-48A(3 kHz, 0 dB)cou

48、ntersetLINE OUTSpecification:1 Speed checker IDigital frequency counterII -0.8+0.8% I 2975 3025 Hz IFrequency difference between the beginningand the end of the tape should be within 0.84%(25 Hz).Adjustment Location:motorAdjust the speedby using screwdriver. Whenturning the screw clockwise, speed is

49、 faster.TC-FX45GENERAL SECTIONNo2Part No.1 l-548-574-002 3-304-419-413b;3-304-423-0046;3-307-517-005 3-307-533-006 3-307-538-517 3-307-563-0184;3-312-615-319 3-313-213-11106;3-315-102-0011 3-315-105-0012 3-315-112-1113 3-315-113-1114 3-315-114-1115 3-315-117-11164;3-315-118-0017 3-315-119-11186;3-31

50、5-120-0019 3-315-121-11206;3-315-122-0021 3-315-124-0022 6;3-315-125-3222 6;3-315-125-4222 6;3-315-125-5223);3-315-127-0024 3-315-128-0024 3-315-129-0024 3-315-130-0024 3-315-131-0025 3-315-132-0026 d;3-315-146-0027 3-315-153-00286;3-315-156-0029 3-480-135-0030 3-540-244-0031 3-575-524-00324;3-575-5