Sony-TCWE825S-tape-sm 电路图 维修手册.pdf

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1、 1 Model Name Using Similar Mechanism TC-WE505/WE605S/WE705S TC-WE625 :TCM-190RB12CL DECK ATC-WE725/WE825S : Tape TransportTCM-190RB13C Mechanism TypeTC-WE625 :TCM-190RB12CL DECK BTC-WE725/WE825S : TCM-190RB11C SERVICE MANUALUS Model TC-WE625/WE825S Canadian Model TC-WE625 AEP Model UK Model TC-WE72

2、5/WE825S E Model Australian Model Chinese Model TC-WE625 TC-WE625/WE725/ WE825S STEREO CASSETTE DECK MICROFILM System Recording system 4-track 2-channel stereo Fast-winding time (approx.) 90 sec. (with Sony C-60 cassette) High-speed fast-winding time (approx.) (TC-WE825S and TC-WE725 only) 45 sec. (

3、with Sony C-60 cassette) Bias AC bias Signal-to-noise ratio (at peak level and weighted with Dolby NR off) Type I tape, Sony Type I (NORMAL): 55 dB Type II tape, Sony Type II (HIGH): 57 dB Type IV tape, Sony Type IV (METAL): 58 dB S/N ratio improvement (approximate values) With Dolby B NR on: 5 dB a

4、t 1 kHz, 10 dB at 5 kHz With Dolby C NR on: 15 dB at 500 Hz, 20 dB at 1 kHz With Dolby S NR on (TC-WE825S only): 10 dB at 100 Hz, 24 dB at 1 kHz SPECIFICATIONS Continued on next page Photo: TC-WE825S Dolby noise reduction extension manufactured under license from Dolby Laboratories Licensing Corpora

5、tion. HX Pro originated by Bang & Olufsen. “DOLBY”, the double-D symbol a and “HX PRO” are trademarks of Dolby Laboratories Licensing Corporation. Harmonic distortion 0.4% (with Type I tape, Sony Type I (NORMAL): 160 nWb/m 315 Hz, 3rd H.D.) 1.8% (with Type IV tape, Sony Type IV (METAL): 250 nWb/m 31

6、5 Hz, 3rd H.D.) Frequency response (Dolby NR off) Tape type Type I tape, Sony Type I30-16,000 Hz (3 dB, IEC), (NORMAL)20-17,000 Hz (6 dB) Type II tape, Sony Type II30-17,000 Hz (3 dB, IEC), (HIGH)20-18,000 Hz (6 dB) Type IV tape, Sony Type IV30-19,000 Hz (3 dB, IEC), (METAL)20-20,000 Hz (6 dB), 30-1

7、3,000 Hz (3 dB, 4 dB recording) RadioFans.CN 收音机爱 好者资料库 2 Wow and flutter 0.13% W. Peak (IEC) 0.07% W. RMS (NAB) 0.18% W. Peak (DIN) Variable pitch range (approx.) 30 to +30% Inputs Line inputs (phono jacks) Sensitivity : 0.16 V Input impedance : 47 kilohms Outputs Line outputs (phono jacks) Rated o

8、utput level : 0.5 V at a load impedance of 47 kilohms Load impedance : Over 10 kilohms Headphones (stereo phono jack) Output level : 0.25 mW at a load impedance of 32 ohms General Power requirements Where purchasedPower requirements US, Canadian120 V AC, 60 Hz AEP, UK, Chinese220 - 230 V AC, 50/60 H

9、z Australian240 V AC, 50/60 Hz Singapore, Malaysia120/220/230 - 240 V AC, 50/60 Hz Power consumption 30 W Dimensions (approx.) (w/h/d) Model for UK and Australian : 430 120 310 mm (w/h/d) (17 4 3/4 12 1/4 in.) Model for other countries : 430 120 290 mm (w/h/d) including projecting parts and controls

10、 Mass (approx.) 4.3 kg (9 lbs 8 oz) Supplied accessories Audio connecting cords (2 phono plugs - 2 phono plugs) (2) CONTROL A1 cord (supplied for Canadian models only) (1) Design and specifications are subject to change without notice. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK

11、! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS

12、IDENTIFIS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PICES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPLMENTS PUBLIS PAR SONY. To Exposed Metal Parts on Set 0.15F 1.

13、5k AC voltmeter (0.75V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. SAFETY CHECK-OUT After correcting the original service problem, perform the follow- ing safety check before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws,

14、and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microampers). Leakage current

15、 can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measurin

16、g the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a pas- sive VOM that is suitable. Nearly all battery operated digita

17、l multimeters that have a 2V AC range are suitable. (See Fig. A) RadioFans.CN 收音机爱 好者资料库 3 TABLE OF CONTENTS 1. GENERAL 1-1. Location of Controls . 4 2. DISASSEMBLY 2-1. Front Panel Assy . 5 2-2. Mechanism Deck. 5 2-3. Fitting Base . 6 2-4. Capstan Motor, Reel Motor. 6 2-5. Head Deck Assy . 7 3. MEC

18、HANICAL ADJUSTMENTS. 8 4. ELECTRICAL ADJUSTMENTS. 8 5. DIAGRAMS 5-1. IC Pin Description. 12 5-2. Circuit Boards Location . 14 5-3. Printed Wiring Boards Main Section .15 5-4. Schematic Diagram Main Section (1/4) .17 5-5. Schematic Diagram Main Section (2/4) .19 5-6. Schematic Diagram Main Section (3

19、/4) .21 5-7. Schematic Diagram Main Section (4/4) .23 5-8. Printed Wiring Boards Power Section.25 5-9. Schematic Diagram Power Section .26 5-10. Printed Wiring Boards Panel Section .27 5-11. Schematic Diagram Panel Section .29 5-12. Printed Wiring Boards Deck A Section . 31 5-13. Schematic Diagram D

20、eck A Section . 32 5-14. Printed Wiring Boards Deck B Section. 33 5-15. Schematic Diagram Deck B Section . 34 5-16. Printed Wiring Board DOLBY-S Section (TC-WE825S only).35 5-17. Schematic Diagram DOLBY-S Section (TC-WE825S only).35 6. EXPLODED VIEWS 6-1. Case Section .38 6-2. Chassis Section . 39 6

21、-3. Cassette Holder Section . 40 6-4. Front Panel Section .41 6-5. Tape Mechanism Section 1 .42 6-6. Tape Mechanism Section 2 .43 7. ELECTRICAL PARTS LIST.44 MODEL IDENTIFICATION Back panel Part No. Part No.Model 3-021-228-0TC-WE625: US model 3-021-228-1TC-WE625: CND model 3-021-228-2TC-WE625: AUS m

22、odel 3-021-228-3TC-WE625: SP, MY model 3-021-228-4TC-WE625: CH model 3-021-242-0TC-WE725: AEP model 3-021-242-1TC-WE725: UK model 3-021-243-0TC-WE825S : AEP model 3-021-243-1TC-WE825S : UK model 3-021-243-3TC-WE825S : US model Abbreviation CND : Canadian model AUS : Austrarian model SP: Singapore mo

23、del MY: Malaysia model CH: Chinese model RadioFans.CN 收音机爱 好者资料库 4 SECTION 1 GENERAL 1-1. LOCATION OF CONTROLS 1 2 3 4 56 10 798 23 22 21 20 19 18 111412131516 17 1.1/u (Power) button (US, Canadian) U (Power) button (EXCEPT US, Canadian) 2.DIRECTION MODE switch 3.PITCH CONTROL ( ON/ OFF) switch (TC-

24、WE725/WE825S) 4.PITCH CONTROL knob (TC-WE725/WE825S) 5.Cassette holder (Deck A) 6.COUNTER A buttons (Deck A) RESET button MEMORY button 7.Display window 8.COUNTER B buttons (Deck B) RESET button MEMORY button 9.Cassette holder (Deck B) 10. RMS buttons RMS/START button SET button CHECK button DISPLAY

25、 button 11. Tape operation buttons (Deck A) 0 (AMS), RMS - button ) (AMS), RMS + button pCLEAR (Stop) button BACK (Reverse play) button FRONT (Foward play) button PPAUSE button RREC MUTING button rREC button 12. (Eject) button (Deck A) 13. DOLBY NR switches ON, OFF, FILTER switch B, C, S switch (“S”

26、 use for TC-WE825S) 14. Tape operation buttons (Deck B) 0 (AMS) button ) (AMS) button p(Stop) button (Reverse play) button (Foward play) button PPAUSE button RREC MUTING button rREC button 15. (Eject) button (Deck B) 16. START (DECK B P) buttons A+B REC button HIGH/NORMAL, DUBBING AnB button 17. AUT

27、O CAL (START P) buttons DECK A button DECK B button 18. PHONES jack 19. SYNCHRO button and indicator 20. ARL button 21. FADER button 22. REC LEVEL knob 23. AUTO indicator 5 SECTION 2 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. CASE Unscrew the five case attachme

28、nt screws M3 8 and remove the case. 2-1. FRONT PANEL ASSY 1 BVTP 3x8 2 lug plate 3 CNA807 1 BVTP 3x82 power voltage selector 4 CNS802 5 CNA801 (US, Canadian) 6 CNA803 7 CNA806 8 CN51 0 CN002 ! CNP73 ! claw ! CN501, 502 ! BVTP 3x6 ! claw ! CN503, 504 ! BVTP 3x8 ! front panel assy 9 CN51 (WE725/WE825S

29、) 5 BVTP 2.6x8 4 BVTP 2.6x8 6 mechanism deck 3 cassette lid 2 claws 2-2. MECHANISM DECK 1 Press the EJECT button. POWER VOLTAGE SELECTOR 1 - 2 (Singapore, Malaysia) FRONT PANEL ASSY 1 - ! 6 2-3. FITTING BASE 2-4. CAPSTAN MOTOR, REEL MOTOR 4 PTPWH 2x23 3 connector 7 gear (trigger) 5 claws 6 fitting b

30、ase 1 Pull the capstan belt and put around claws. 2 Pull the square belt and put around claws. 0 reel motor 5 claws 6 AUDIO board 2 connector 4 claw 3 connector 1 square belt 9 P 2.6x2.8 7 B 2.6x3 8 capstan motor ! ground plate 7 2-5. HEAD DECK ASSY 5 torsion spring 3 claw 1 claw 6 claw 7 head deck

31、assy 2 lever (pinch F) assy 4 lever (pinch R) assy 8 PRECAUTION 1.Clean the following parts with a denatured alcohol-moistened swab : record/playback/erase headpinch roller rubber beltscapstan idlers 2.Demagnetize the record/playback head with a head demagnetizer. 3.Do not use a magnetized screwdriv

32、er for the adjustment. 4.After the adjustments, apply suitable locking compound to the parts adjusted. 5.The adjustments should be performed with the rated power supply voltage unless otherwise noted. Torque Measurement ModeTorque meterMeter reading ForwardCQ-102C 30 to 65 g cm (0.42 to 0.90 oz inch

33、) DECK A : 1 to 6 g cm Forward(0.014 to 0.083 oz inch) backCQ-102C tensionDECK B : 2 to 9 g cm (0.028 to 0.125 oz inch) ReverseCQ-102RC 30 to 65 g cm (0.42 to 0.90 oz inch) Reverse 1 to 6 g cm backCQ-102RC (0.014 to 0.083 oz inch) tension FF/REWCQ-201B 70 to 120 g cm (0.97 to 1.67 oz inch) SECTION 4

34、 ELECTRICAL ADJUSTMENTS SECTION 3 MECHANICAL ADJUSTMENTS PRECAUTION 1.The adjustment should be performed in the publication. (Be sure to male playback adjustment at first.) 2.The adjustments and measurement should be performed for both L-CH and R-CH. Switch position DOLBY NR switch: OFF DIRECTION MO

35、DE switch : A Standard record position : Deliver the standard input signal level to input jack and set the REC LEVEL control to obtain the standard output signal level as follows. Record Mode 0 dB = 0.775 V Standard Input Level Input terminalLINE IN source impedance10 k input signal level0.5 V (3.8

36、dB) Standard Output Level Output terminalLINE OUT load impedance47 k output signal level0.5 V (3.8 dB) Test Tape TapeContentsUse P-4-A10010 kHz, 10 dBAzimuth Adjustment WS-48B3 kHz, 0 dBTape Speed Adjustment P-4-L300315 Hz, 0 dBPB Level Adjustment set + AF OSC attenuator 10 k 600 LINE IN level meter

37、 LINE OUT 47 k Test Mode 1. Turn ON power switch pressing “REC MUTING” switch of deck A and B at the same time. At first, all the fluorescent indicator light up, then the system returns to normal display. (However, “0. 00” is not displayed on the counter.) 2. To release the test mode, turn OFF the p

38、ower switch. 9 Record/Playback Head Azimuth Adjustment DECK A DECK B Procedure: 1. Forward Playback Mode 2. Turn the adjustment screw for the maximum output levels. If these levels do not match, turn the adjustment screw until both of output levels match together within 1 dB. 3. Playback Mode 4. Cha

39、nge the reverse playback mode and repeat the steps 1 to 3. 5. After the adjustment, lock the adjustment screws with suitable locking compound. Adjustment Location: record/playback head + set test tape P-4-A100 (10 kHz, 10 dB) level meter LINE OUT 47 k within 1 dB within 1 dB output level R-CH peak R

40、-CH peak L-CH peak L-CH peak screw position screw position + + VH Screen Pattern set In phase4590135180 goodwrong 47 k 47 k L-CH R-CH test tape P-4-A100 (10 kHz, 10 dB) LINE OUT oscilloscope forward sidereverse side adjustment screws Tape Speed Adjustment DECK A DECK B Procedure: Forward Playback Mo

41、de (High speed adjustment) 1. Set to test mode. (Refer to page 8.) 2. Set to FWD playback mode. 3. Twice pressing the HIGH/NORMAL switch. 4. Adjust RV72 so that the frequency counter reading becomes 6,000 20 Hz. 5. Release test mode after adjustment is completed. (Normal speed adjustment) 1. Set to

42、FWD playback mode. 2. Adjust RV71 so that the frequency counter reading becomes 3,000 10 Hz. (Pitch control adjustment) (TC-WE725/WE825S only) 1. Push the PITCH CONTROL switch. 2. Set RV902 to mechanical center. 3. Set to FWD playback mode. 4. Adjust RV601 so that the frequency counter reading becom

43、es 3,000 10 Hz. Frequency difference between the beginning and the end of the tape should be within 3%. Frequency difference between the deck A and deck B the beginning of the tape should be within 1.5%. Adjustment Location: AUDIO board, MAIN board (See page 11.) Playback Level Adjustment DECK A DEC

44、K B Procedure: Forward Playback Mode + set frequency counter 47 k LINE OUT test tape WS-48B (3 kHz, 0 dB) Adjust RV11 (L-CH) and RV21 (R-CH) so the level meter reading becomes the adjustment limits below. Adjustment Value: LINE OUT level : 7.7 0.5 dB (0.301 to 0.338 V) Level difference between chann

45、els : within 0.5 dB Confirm that the LINE OUT level does not change in playback mode while changing the mode from playback to stop several times. Adjustment Location: AUDIO board (See page 11.) + set test tape P-4-L300 (315 Hz, 0 dB) level meter LINE OUT 47 k 10 Bias Consumption Current Adjustment DECK A DECK B This adjustment should be performed when replacing the