Sony-TC-FX45-Service-Manual电路原理图.pdf

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1、US Model Canadian Model Dolby and the double-D symbol are the trade marks of Dolby Laboratories Licensing Corporation. Noise reduction system manufactured under license from Dolby Laboratories Licensing Corporation. SPECIFICATIONS Recording system 4-track 2-channel stereo Fast-forward and rewind tim

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

3、monic distortion 1 0% (with Sony METALLIC and FeCr cassettes) SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY SHADING AND MARK ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR

4、 AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. AEP Model UK Model E Model Frequency response DOLBY NR OFF ?With TYPE IV cassette (Sony METALLIC) 20 18,000 Hz 30 - 16,000 Hz (3 dB), (DIN) 30 - 13,000 Hz (3 dB, 0 VU recording) ?With TYPE III cassette (Sony FeCr) 20 - 16,000 Hz 30 - 16,0

5、00 Hz (3 dB), (DIN) ?With TYPE II cassette (Sony UCX) 20 17,000 Hz 30 - 15,000 Hz (3 dB), (DIN) ?With TYPE I cassette (Sony BHF or HFX) 20 - 16,000 Hz Continued on page 2- ATTENTION AU COMPOSANT AYANT RAPPORT A LA SECURITE! LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET U N E M A R Q U E SUR LES DIAGRAM

6、MES SCHE- MATIQUES, L E S V U E S ECLATEES E T L A LISTE D E S PIECES S0NT CRITIQUES POUR LA SECURITE DE FONCTIONNEMENT. NE REMPLACER CES COMPO- SANTS QUE PAR DES PIECES SONY DONT LES NU- MEROS SONT DONNES DANS CE MANUEL OU OANS LES SUPPLEMENTS PUBLIES PAR SONY. STEREO CASSETTE DECK S O N Y : MICROF

7、ILM RadioFans.CN 收音机爱 好者资料库 Wow and Flutter: 0.05% WRMS (NAB) 0.14% (DIN) Inputs: Microphone inputs (phone jacks) Sensitivity 0.25 mV (-70 dB) For a low-impedance microphone Line inputs (phono jacks) Sensitivity 77.5 mV (-20 dB) Input impedance 47 k ohms outputs: Line outputs (phono jacks) Output le

8、vel 0.44 V (-5 dB) at load impedance 47 k ohms Load impedance over 10 k ohms Headphone output Output level -28dB at a load impedance of 8 ohms General Power Requirements: AEP model: 220 V ac, 50/60 Hz (240 V ac adjustable by authorized Sony personnel) UK model: 240 V ac, 50 Hz (220 V ac adjustable b

9、y authorized Sony personnel) US, Canadian model: 120 V ac, 60 Hz E model: 110,120,220 or 240 V ac ad- justable, 50/60 Hz Power Consumption: 14 watts Dimensions: Approx. 430 x 105 x 275 mm (w/h/d) (17 x 4, x inches) including projecting parts and controls Weight: US, Canadian, AEP, UK model: Approx.

10、4.4 kg (9lbs 12oz) E model: Approx. 4.5 kg (9 Ibs 15oz) (OdB=0.775V 1 1 Tape Transport Mechanism Type 1 TCM-130VlO FEATURES Dolby NR C-type noise reduction system In addition to the conventional B-type Dolby NR system, this cassette deck employs the newly-developed C-type Dolby NR system which reduc

11、es tape noise twice as effectively as the B-type system. The C-type system also incorporates an anti-saturation network to improve the high-frequency dynamic range by 4 dB at 10 kHz. Full-logic “feather-touch” operation At the slightest touch, the “feather-touch” function buttons enable you to switc

12、h directly from one mode to another without going through the stop mode. Blank skip function Blank spaces of at least 10 seconds long can be skipped in the fast- forward mode so that only he recorded portions of the tape are played back. Music scan function The first 10 seconds or so of all the sele

13、ctions on a tape can be played back in sequence. Thus the particular selection can be located easily. Repeat play Playback of one side of the cassette can be repeated five times. At the end of the tape, the cassette deck will automatically go into he rewind mode, and playback will be repeated from t

14、he beginning of the tape. AMS (Automatic Music Sensor) The AMS locates the beginning of he selection being played, or the following selection, by searching either forward, or in reverse, for the blank space between selections, and then plays back the selec- tion automatically. Automatic tape select

15、system The tape type is automatically detected and the recorder is ad- justed to its optimum bias current for recording and the optimum equalization for both recording and playback by simply Inserting the cassette in the cassette holder. Auto play The auto play function makes automatic replay possib

16、le promp ly after the tape is rewound to the beginning. Remote control operation Using he optional RM-50, RM-51 or RM-80 remote control unit, various operations-recording, playback, AMS, record muting operation, etc.-can be remotely controlled. When the RM-65 syn- chro remote control unit is used to

17、 connect this cassette deck with a turntable equipped with a synchro remote control jack, the opera- tion of the cassette deck and the turntable will be synchronized. Timer-activated recording or playback A timer switch is provided to turn the deck on and off at times preset on an optional timer. Ra

18、dioFans.CN 收音机爱 好者资料库 0 POWER switch This turns the power on or off. The peak level meters illuminate when the unit is turned on. REC LEVEL (recording level) controls These controls adjust the recording level. The upper slide bar is for the left channel and the lower for the right channel. Tape COUN

19、TER and RESET button The tape counter provides a numerical reference point while record- ing which can be used to index a recorded cassette. To reset to zero. press the RESET button. TAPE SELECT switch and tape type indicators Generally set this switch to AUTO (n). The automatic tape select system w

20、ill then operate. When using a TYPE Ill (Fe-Cr) cassette or a TYPE IV (METAL) cassette which has no METAL tape detector slots, depress this switch to set it to the TYPE Ill (IV) position When Inserting a cassette, one of the tape type indicators will light up depending on the type of tape and the po

21、sition of the TAPE SELECT switch. L E V E L M E T E R S These meters show the peak input level of each channel during recording, and recorded levels in the playback mode. They follow the transient peaks of high-level inputs that are too brief to be followed by conventional VU meters so that he optim

22、um recording level can be accurately set. Function buttons It is possible to switch directly from one mode to another. The in- dicator lamps on the buttons light to show the operating mode (ex- cept the and ?buttons). (forward) button : Press this button to play the tape back. To record, press this

23、button while holding the button down. (rewind) button : Press this button to rewind the tape. This button is also used for “AMS” and “Auto play”. AMS button : Press this button and or button for AMS function. (fast-forward) button : Press this button to advance the tape rapidly. This button IS also

24、used for “AMS”. (stop) button : To stop the tape, press this button. The tape will stop automatically when it is completely wound in either direc- tion. ?(record) button : Press this button together with the) button to start recording. Also press this button before adjusting the recording level. (re

25、cord muting) button: Press this button to eliminate un- wanted material and to insert a blank space during recording. II (pause) button : To pause for a moment during recording or playback, press this button. This button IS also used to control more precisely the start of recording and to release he

26、 record muting mode. switch You can set the unit to record or play back at a predetermined time by connecting any commercially available timer. To record, set this timer switch to REC. To play back, set it to PLAY. (eject) button Press this button to open the cassette holder HEADPHONES jack Headphon

27、es may be inserted either to monitor the input signals to be recorded or to listen to a recording in the playback mode. REPEAT switch Depress this switch ON) to repeat the playing of one side of the cassette five times. Press it again (n OFF) to cancel repeat play. MUSIC SCAN/BLANK SKIP switches The

28、 ON/OFF switch on the left actuates and switches off the music scan and blank skip functions and the switch on the right selects either the music scan function or the blank skip function. Depress the left switch ON) and the right switch MUSIC SCAN) to scan the first 10 seconds of all the selections.

29、 Depress the left switch ON) and release the right switch BLANK SKIP) to skip blank spaces representing more than 1 0 seconds, during playback. DOLBY NR switches The left switch turns the Dolby NR* (Noise Reduction) system on and off and the right switch selects either the B-type or C-type Dolby NR

30、system. To record with the Dolby NR process, depress the ON/OFF switch to the ON position and choose between B-TYPE and C-TYPE To record without the Dolby NR process, press the ON/OFF switch again to release. When playing back, set these switches to the same position used in recording. For details a

31、bout the Dolby NR system. * “Dolby” and the double-D symbol are trade marks of the Dolby Labora- tories Licensing Corporation. Noise reduction system manufactured under license from Dolby Laboratones Licensing Corporation. MIC jacks Any low-impedance microphone equipped with a phone plug may be used

32、. If your microphone is equipped with a mini plug, you will need a plug adaptor. TROUBLE CHECKS The following trouble checks will help you correct the most com- mon problems encountered with a tape deck. Should any problem persist after you have made these checks, consult your nearest Sony service f

33、acility. Before proceeding with these trouble checks, first check these basic points : ?The power cord must be firmly connected. ?Amplifier connections must be firmly made. Heads, capstan and pinch roller should be clean. ?The amplifier controls and switches should be set correctly. The function but

34、tons do not activate right after the POWER switch is turned on. Logic-controlled function buttons operate approximately 2 seconds after the POWER switch is turned on. The button and the button do not activate. ?The cassette holder is not fully closed. The button does not activate. No cassette in the

35、 holder. ?The tab has been removed from the cassette. The automatic shut-off mechanism activates before the end of the tape. ?The tape 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 situati

36、on depends upon the cassette used and is not a prob- lem. Recording or playback cannot be made or there is a decrease in sound level. ?Contamination or magnetic build-up on the record/playback head. ?improper connection. Improper setting of the amplifier controls. The AMS does not operate. ?The blan

37、k space between the selections is less than four seconds long. Severe noise or hum exists in the blank spaces. ?A recorded selection is less than 20 seconds long. The MUSIC SCAN and BLANK SKIP functions do not operate. ON/OFF switch on the left of the MUSIC SCAN/BLANK SKIP switches is released (OFF)

38、. Excessive wow or flutter or drop out ?Contamination of the capstan or pinch roller. incomplete erasure ?Contamina ion of he erase head. increase of noise or erasure of high frequencies Magnetic build-up on the head. Unbalanced tone in higher frequencies improper setting of the DOLBY NR switches. W

39、hen playing back, set the switches to the same position used in recording. Improper setting of the TAPE SELECT switch. Depress the TAPE SELECT 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

40、from microphones. ?The microphone is too near the loudspeakers. Move the microphone away from the loudspeakers or reduce the amplifier volume. Hum noise ?The tape deck is stacked on or under the amplifier. Separate the units. TC-FX45 SECTION 3 ADJUSTMENTS 3-1 MECHANICAL ADJUSTMENTS PRECAUTION 1. Cle

41、an the following parts with a denatured- 3. alcohol-moistened swab: record/playback head pinch roller 4. erase head rubber belts capstan idlers 5 2. Demagnetize the record/playback head with a head demagnetizer. Do not use a magnetized screwdriver for the adjustments. After the adjustments, apply su

42、itable locking compound to the parts adjusted. The adjustments should be performed with the rated power supply voltage unless otherwise noted. lead Height Adjustment 1. Prepare an adjustment cassette as shown below. C- 1 Cur out hatched tape cassette portions. 2. In playback mode and viewing from th

43、e front, adjust the head heights to eliminate tape curl and tape twist at portions of the arrow. erase head record/playback 3-513-237-01 (t=O.l) 3-513-237-11 (t=0.2) Shim, head height adjustment Soft Eject Adjustment Specification Set the tape (C-90) and adjust the adjustment screw so that the EJECT

44、 TIME is within the specification. fast slow adjustment screw Torque Measurement 1 Torque Torque meter Meter reading 28- 60gm-cm Forward CQlO2C (0.38 - 0.83 oz-inch) 2.5 - 6g-cm Back Tension (0.03 - 0.07 oz-inch) Fast Forward 80 - 165 g-cm and Rewind (1.1 - 2.2 oz-inch) Pinch Roller Pressure Measure

45、ment - Playback Mode - Slowly return he pinch roller and read the spring scale just when the pinch roller starts rotating. (The capstan should pinch roller tension gauge -14- 3-2. ELECTRICAL ADJUSTMENTS Capstan motor Speed Adjustment Note: The adjustment should be performed in the order given in thi

46、s service manual. The adjustments should be performed for both L-CH and R-CH. Set the BIAS and EQ switches according to the tape as follows. cs-30 I Fe-Cr (METAL) III: Fe-Cr cs-40 AUTO Fe-Cr (METAL) IV: METAL Switches and controls should be set as follows unless otherwise specified. DOLBY NR switch:

47、 OFF TAPE switch: AUTO (I: NORM) ?Standard Record: Deliver the standard input signal level to the input jack and set the REC LEVEL control to obtain the standard output signal level. Standard Input Level MIC LINE IN source impedance 300 ohm 1Ok input level 0.77 mV (-60 dB) 0.25 V (-10 dB) Standard O

48、utput Level H E A D P H O N E S L I N E O U T 1 load impedance 4 7 k output level 31 mV (-26 dB) 1 0.435 V (-5 dB) I - 15- Procedure: Mode: playback speed checker L FM-30 digital test tape WS-48A (3 kHz, 0 dB) counter set LINE OUT Specification: Speed checker IDigital frequency counter I -0.8+0.8% I

49、 2975 3025 Hz I Frequency difference between the beginning and the end of the tape should be within 0.84% (25 Hz). Adjustment Location: motor Adjust the speedby using screwdriver. When turning the screw clockwise, speed is faster. TC-FX45 GENERAL SECTION NoPart No. 1 l-548-574-00 2 3-304-419-41 3;3-304-423-00 4;3-307-517-00 5 3-307-533-00 6 3-307-538-51 7 3-307-563-01 8;3-312-615-31 9 3-313-213-11 10;3-315-102-00 11 3-315-105-00 12 3-315-112-11 13 3-315-113-11 14 3-315-114-11 15 3-315-117-11 16;3-315-118-00 17 3-315-119-11 18;3-315