Sony-TCFX45-tape-sm 电路图 维修手册.pdf

《Sony-TCFX45-tape-sm 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Sony-TCFX45-tape-sm 电路图 维修手册.pdf（41页珍藏版）》请在收音机爱好者资料库上搜索。

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 A 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 APPE

4、AR 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 -

5、16,000 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 A SUR LES

6、 DIAGRAMMES 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

7、: MICROFILM 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) O

8、utput level 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 adju

9、stable by 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 107/s inches) including projecting parts and controls Weight: US, Canadian, AEP, UK m

10、odel: Approx. 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 syst

11、em which reduces 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 enabl

12、e you to switch 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 the recorded portions of the tape are played back. Music scan function The first 10 seconds or so

13、of all the selections 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 the rewind mode, and playback will be

14、 repeated from the beginning of the tape. AMS (Automatic Music Sensor) The AMS locates the beginning of the 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. Autom

15、atic tape select 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 automa

16、tic replay possible promptly after the tape is rewound to the beginning. Remote control operation Using the 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 contr

17、ol unit is used to 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

18、optional timer. RadioFans.CN 收音机爱 好者资料库 RadioFans.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

19、the lower for the right channel. Tape COUNTER 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 AU

20、TO (n). The automatic tape select system will 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 (n). When Inserting a cassette, one of the tape type indicators will li

21、ght up depending on the type of tape and the position of the TAPE SELECT switch. PEAK 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

22、 followed by conventional VU meters so that the optimum recording level can be accurately set. 0 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 44, H and ? buttons). ) (forward) button :

23、 Press this button to play the tape back. To record, press this button while holding the 0 button down. tl (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 the+4 or H button for AMS function. H (fast-forwar

24、d) button : Press this button to advance the tape rapidly. This button IS also used for “AMS”. w (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

25、 start recording. Also press this button before adjusting the recording level. 0 (record 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 bu

26、tton IS also used to control more precisely the start of recording and to release the record muting mode. TIMER 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

27、PLAY. 0 6 (eject) button Press this button to open the cassette holder 0 HEADPHONES jack Headphones 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 (P ON) to repeat the playing of one side of the c

28、assette five times. Press it again (n OFF) to cancel repeat play. MUSIC SCAN/BLANK SKIP switches The 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

29、left switch (-ON) and the right switch (P MUSIC SCAN) to scan the first 10 seconds of all the selections. Depress the left switch (a ON) and release the right switch (n BLANK SKIP) to skip blank spaces representing more than 1 0 seconds, during playback. DOLBY NR switches The left switch turns the D

30、olby NR* (Noise Reduction) system on and off and the right switch selects either the B-type or C-type Dolby NR system. To record with the Dolby NR process, depress the ON/OFF switch to the ON position and choose between B-TYPE (n) and C-TYPE (=). To record without the Dolby NR process, press the ON/

31、OFF switch again to release. When playing back, set these switches to the same position used in recording. For details about 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 fro

32、m Dolby Laboratones Licensing Corporation. I MIC jacks Any low-impedance microphone equipped with a phone plug may be used. 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 enco

33、untered with a tape deck. Should any problem persist after you have made these checks, consult your nearest Sony service facility. Before proceeding with these trouble checks, first check these basic points : ? The power cord must be firmly connected. ? Amplifier connections must be firmly made. 0 H

34、eads, 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 switch is turned on. 0 Logic-controlled function buttons operate approximately 2 seconds after the POWER switch is turned on. The

35、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 the tape. ? The tape is slack. ? This situatio

36、n 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 in sound level. ? Contamination or magne

37、tic build-up on the record/playback head. ? improper connection. 0 Improper setting of the amplifier controls. The AMS does not operate. ? The blank space between the selections is less than four seconds long. 0 Severe noise or hum exists in the blank spaces. ? A recorded selection is less than 20 s

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

39、ase of noise or erasure of high frequencies 0 Magnetic build-up on the head. Unbalanced tone in higher frequencies 0 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 TAPE S

40、ELECT 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 the microphone away from the loudspeakers or reduce the amplifier v

41、olume. 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. Clean the following parts with a denatured- 3. alcohol-moistened swab: record/playback head pinch roller 4. erase head rubber belts capst

42、an 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 suitable locking compound to the parts adjusted. The adjustments should be performed with the rated power supply voltage unless otherwi

43、se 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 the front, adjust the head heights to eliminate tape curl and tape twist at portions of the arrow. erase head record/playback ; 3-513-2

44、37-01 (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 TIME is within the specification. fast slow adjustment screw Torque Measurement 1 Torque Torque meter Meter reading 28- 60gm-cm Fo

45、rward 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 Measurement - Playback Mode - Slowly return he pinch roller and read the spring scale just when the pinch roller starts rotating. (The cap

46、stan should pinch roller 0 tension gauge -14- 3-2. ELECTRICAL ADJUSTMENTS Capstan motor Speed Adjustment Note: The adjustment should be performed in the order given in this service manual. The adjustments should be performed for both L-CH and R-CH. Set the BIAS and EQ switches according to the tape

47、as follows. gj 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: OFF TAPE switch: AUTO (I: NORM) ? Standard Record: Deliver the standard input signal level to the input jack and set the REC

48、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 Output Level 1 1 H E A D P H O N E S 1 L I N E O U T 1 1 load impedance 18n I 4 7 k 1 1 output level 1 31 mV (-26 dB) 1 0.435

49、V (-5 dB) I - 15- Procedure: Mode: playback speed checker L FM-30 digital ?Ferkquencv test tape WS-48A (3 kHz, 0 dB) counter set LINE OUT Specification: 1 Speed checker IDigital frequency counterI I -0.8+0.8% I 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 No 2 Part No. 1 l-548-574-00 2 3-304-419-41 3b;3-304-423-00 46;3-307-517-00 5 3-307-53