Sony-TCWE635-tape-sm 电路图 维修手册.pdf

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1、 1 SERVICE MANUALUS Model Canadian Model AEP Model UK Model E Model Australian Model Chinese Model STEREO CASSETTE DECK MICROFILM SPECIFICATIONS Dolby noise reduction extension manufactured under license from Dolby Laboratories Licensing Corporation. HX Pro originated by Bang & Olufsen. “DOLBY”, the

2、 double-D symbol a and “HX PRO” are trademarks of Dolby Laboratories Licensing Corporation. TC-WE635 Continued on next page Model Name Using Similar MechanismTC-WE425/WE525/WR681 Transport Mechanism TypeTCM-230ASR4/HSR4 RadioFans.CN 收音机爱 好者资料库 2 SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIE

3、D BY MARK ! 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 C

4、OMPOSANTS 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. SAFETY CHECK-OUT After corre

5、cting the original service problem, perform the follow- ing safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE The AC leakage from any

6、 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). Leak- age current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A.

7、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. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.7

8、5 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 digital multimeters that have a 2V AC range are suitable. (See Fig. A) Fig. A. Using an AC voltmeter to check AC leakage. 0.

9、15F To Exposed Metal Parts on Set 1.5k AC voltmeter (0.75V) Earth Ground RadioFans.CN 收音机爱 好者资料库 3 MODEL IDENTIFICATION Back panel PARTS No.MODEL 3-032-412-0US model 3-032-412-1CND model 3-032-412-2AEP model 3-032-412-3UK model 3-032-412-4AUS model 3-032-412-5SP, MY model 3-032-412-6CH model Abbrevi

10、ation CND : Canadian model SP: Singapore model MY: Malaysia model AUS : Australian model CH: Chinese model TABLE OF CONTENTS 1. GENERAL. 4 2. DISASSEMBLY 2-1. Case . 5 2-2. Front Panel Assembly . 5 2-3. Cassette Lid Assembly (Deck A/B) . 6 2-4. Mechanism Deck Assembly (Deck A/B) . 6 2-5. Leaf SW (RE

11、C/PB) Board (Deck A/B) . 7 2-6. Pinch Lever (FWD)/(REV) Assembly (Deck A/B). 8 2-7. Flywheel (FWD)/(REV) Assembly (Deck A/B) . 8 2-8. Mechanical Block Assembly (Deck A/B) . 9 2-9. Head Relay (REC/PB) Board (Deck A/B) . 9 3. SERVICE MODE. 10 4. MECHANICAL ADJUSTMENTS.11 5. ELECTRICAL ADJUSTMENTS.11 6

12、. DIAGRAMS 6-1. Circuit Boards Location .15 6-2. Printed Wiring Board Main Section .17 6-3. Schematic Diagram Main Section (1/4). 19 6-4. Schematic Diagram Main Section (2/4). 21 6-5. Schematic Diagram Main Section (3/4). 23 6-6. Schematic Diagram Main Section (4/4). 25 6-7. Printed Wiring Board Dec

13、k Section .27 6-8. Schematic Diagram Deck Section . 28 6-9. Schematic Diagram Display Section . 29 6-10. Printed Wiring Board Display Section .31 6-11. Schematic Diagram Panel Section .33 6-12. Printed Wiring Board Panel Section .35 6-13. Schematic Diagram Power Section . 37 6-14. Printed Wiring Boa

14、rd Power Section . 39 6-15. IC Pin Function . 41 7. EXPLODED VIEWS 7-1. Case Section. 43 7-2. Chassis Section .44 7-3. Cassette Holder Section .45 7-4. Front Panel Section . 46 7-5. Tape Mechanism Section (TCM-230ASR4/HSR4). 47 8. ELECTRICAL PARTS LIST. 48 Part No. RadioFans.CN 收音机爱 好者资料库 4 SECTION

15、1 GENERAL LOCATION OF PARTS AND CONTROLS 1U button 2RESET (Deck A) button 3MEMORY (Deck A) button 4RESET (Deck B) button 5MEMORY (Deck B) button 6AUTO REC LEVEL indicator 7REC LEVEL knob 8FADER button 9ARL button 10 SYNCHRO button 11 PHONES jack 12 HIGH/NOMAL button 13 A+B REC button 14 DECK B butto

16、n 15 DECK A button 16 (AMS) ) (Deck B) button 17 0 (AMS) (Deck B) button 18 (Deck B) button 19 (Deck B) button 20 REC r (Deck B) button 21 (Eject) (Deck B) button Front Panel 22 REC MUTING R (Deck B) button 23 PAUSE P (Deck B) button 24 p (Deck B) button 25 DOLBY NR B/C switch 26 DOLBY NR OFF/ON FIL

17、TER 27 /FRONT (Deck A) button 28 /BACK (Deck A) button 29 REC r (Deck B) button 30 REC MUTING R (Deck A) button 31 (Eject) (Deck A) button 32 PAUSE P (Deck A) button 33 p/CLEAR (Deck A) button 34 (AMS) ) (Deck A) button 35 0 (AMS) (Deck A) button 36 DISPLAY button 37 CHECK button 38 SET button 39 RM

18、S/START button 40 PITCH CONTROL knob 41 PITCH CONTROL button 42 DIRECTION switch AMS is the abbreviation for Automatic Music Sensor. 10 8 9 2467135 2321 22 20 11 1314151216181917 24 25 26 2728 2930 31 33 32 3435 36373839 40 41 42 5 SECTION 2 DISASSEMBLY Note : Follow the disassembly procedure in the

19、 numerical order given. 2-1. CASE 2-2. FRONT PANEL ASSEMBLY 1 Screw (BVTP 3x8) 2 Two Screws (Case 3 TP2) 3 Two Screws (Case 3 TP2) 4 Case ! Screw (BVTP 3x8) ! Screw (BVTP 3x8) ! Screw (BVTP 3x8) ! Two screws (BVTT 3x6) ! Claw ! Claw ! Front panel assy 9 CN1002 0 CN1003 2 CN807 1 CN5802 3 CN803 4 CNA

20、806 5 Flat type wire (Deck A) ! CN002 6 Flat type wire (Deck B) 7 Screw (BVTP 3x8) 8Wire 6 2-3. CASSETTE LID ASSEMBLY (DECK A/B) 2-4. MECHANISM DECK ASSEMBLY (DECK A/B) 2 Four claws 1 Push the EJECT button. 3 Cassette lid assy 1 Two screws (BVTP 2.6x8) 3 Mechanism deck assy 2 Two screws (BVTP 2.6x8)

21、 7 2-5. LEAF SW (REC/PB) BOARD (DECK A/B) 1 Two screws (PS 2.6x6) 2 Capstan motor assy 8 Belt (capstan) 3 Wires 5 Screw (BVTT 2x4) 4 Screw (BVTT 2x4) 6 Claws Claws 7 LEAF SW (REC/PB) board When installing, pull the belt (capstan) put around claws. a a b b 8 2-6. PINCH LEVER (FWD)/(REV) ASSEMBLY (DEC

22、K A/B) 2-7. FLYWHEEL (FWD)/(REV) ASSEMBLY (DECK A/B) 4 Pinch lever (FWD) assy 2 Pinch lever (REV) assy 1 Claw 3 Claw 1 Belt (FR2) 3 Flywheel (FWD) assy 6 Flywheel (REV) assy 4 Washer 7 Washer 2 Stopper washer 5 Stopper washer 9 2-8. MECHANICAL BLOCK ASSEMBLY (DECK A/B) 2-9. HEAD RELAY (REC/PB) BOARD

23、 (DECK A/B) 2 Two screws (BVTT 2x3.5) 1 Torsion spring 5 Reverse slider 4 Mechanical block assy 3 Two screws (BVTT 2x3.5) 3 Tension spring (HEAD) 2 HEAD RELAY (REC/PB) board 1 Screw (BVTT 2x4) 4 Head deck assy 10 RESET0 MEMORY1 RMS/START2 SET3 CHECK4 DISPLAY5 0 (AMS)6 (AMS) )7 p/CLEARGrid check disp

24、lay (*1) 9/BACK8 (/FRONT9 PAUSE PA REC MUTING Rb REC rC DIRECTION MODE switch A dPLAY RELAY A deck side ButtonDisplay KEY CHECK & DISPLAY CHECK MODE While pressing the /BACK (A deck) and REC MUTING R (B deck) buttons with the power off, press the U button to turn on the power. The fluorescent displa

25、y tube displays the number or special message corresponding to the button pressed. The message displayed differs according to the position of the switch. SECTION 3 SERVICE MODE RESET0 MEMORY1 DECK A2 DECK B3 A+B REC4 HIGH/NOMAL5 0 (AMS)6 (AMS) )7 pSegment check display (*2) 8 9 PAUSE PA REC MUTING R

26、b REC rC FADERd ARLE SYNCHROAll lit DOLBY NR switch (*3) OFF BPLAY C B deck side ButtonDisplay Grit check display (*1) Segment check display (*2) RMS (*3) The DOLBY NR switch consists of a pair of switches. B and C are valid only in the ON or ON FILTER state. 11 PRECAUTION 1. Clean the following par

27、ts with a denatured alcohol-moistened swab : record/playback/erase headpinch roller rubber beltscapstan idlers 2. Demagnetize the record/playback head with a head demagne- tizer. 3. Do not use a magnetized screwdriver for the adjustment. 4. After the adjustments, apply suitable locking compound to t

28、he parts adjusted. 5. The adjustments should be performed with the rated power sup- ply voltage unless otherwise noted. Torque Measurement SECTION 5 ELECTRICAL ADJUSTMENTS SECTION 4 MECHANICAL ADJUSTMENTS PRECAUTION 1. The adjustment should be performed in the publication. (Be sure to male playback

29、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 MODE switch : A Standard record position : Deliver the standard input signal level to input jack and set the REC LEVEL knob to obtain the standard outpu

30、t signal level as follows. Record Mode 0 dB = 0.775 V Standard Input Level Test Mode 1. While pressing the /FRONT (DECK A) and REC MUT- ING R buttons with the power off, press the U button to turn on the power. The fluorescent display tube lights up for about one second, and the test mode is set. Th

31、e test mode performs the following two special functions. Playback speed switching function Pressing the HIGH/NORMAL button switches the playback speed between standard/double speed. Counter RESET & MEMORY function Resets the counter when recording starts. When rewound with the 0 (AMS) button after

32、recording, stops at the point where recording started. 2. To release the test mode, turn OFF the power switch. ModeTorque meterMeter reading ForwardCQ-102C 30 to 65 g cm (0.42 to 0.90 oz inch) Forward back tension CQ-102C DECK A : 1 to 6 g cm (0.014 to 0.083 oz inch) DECK B : 2 to 9 g cm (0.028 to 0

33、.125 oz inch) ReverseCQ-102RC 30 to 65 g cm (0.42 to 0.90 oz inch) Reverse back tension CQ-102RC 1 to 6 g cm (0.014 to 0.083 oz inch) FF/REWCQ-201B 70 to 120 g cm (0.97 to 1.67 oz inch) set + AF OSC attenuator 10 k 600 LINE IN level meter LINE OUT 47 k Standard Output Level Test Tape Input terminalL

34、INE IN source impedance10 k input signal level0.5 V (3.8 dB) Input terminalLINE IN source impedance10 k input signal level0.5 V (3.8 dB) TapeContentsUse P-4-A10010 kHz, 10 dBAzimuth Adjustment WS-48B3 kHz, 0 dBTape Speed Adjustment P-4-L300315 Hz, 0 dBPB Level Adjustment 12 Record/Playback Head Azim

35、uth 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. Change the reverse playback mode and repeat

36、 the steps 1 to 3. 5. After the adjustment, lock the adjustment screws with suitable locking compound. Adjustment Location: record/playback head Tape speed Adjustment DECK A DECK B Adjust DECK A first Procedure: Forward Playback Mode (High speed adjustment) 1. Press the PITCH CONTROL button to set t

37、o OFF . 2. Set to test mode. (Refer to page 11.) 3. Press the button to playback. 4. Press the HIGH/NORMAL button to playback at double speed. 5. Adjust RV316 (DECK A), RV416 (DECK B) so that the fre- quency counter reading becomes 5,980 80 Hz. (Normal speed adjustment) 6. Press the button to playba

38、ck. 7. Press the HIGH/NORMAL button to playback at normal speed. 8. Adjust RV317 (DECK A), RV417 (DECK B) so that the fre- quency counter reading becomes 3,000 90 Hz. (Pitch control adjustment) (DECK A) 9. Press the PITCH CONTROL button to set to ON . 10. Set PITCH CONTROL knob to mechanical center.

39、 11. Press the button to playback. 12. Adjust RV318 so that the frequency counter reading becomes 2,990 90 Hz. Adjustment Location: MAIN board (See page 14.) Sample value of wow and flutter W.RMS (JIS) less than 0.3% . (test tape : WS-48B) Playback Level Adjustment DECK A DECK B Procedure: Forward P

40、layback Mode Adjust DECK A : RV111 (L-CH), RV211 (R-CH) and DECK B : RV121 (L-CH), RV221 (R-CH) so the level meter read- ing becomes the adjustment limits below. Adjustment Value: LINE OUT level : 7.7 0.5 dB (0.301 to 0.338 V) Level difference between channels : within 0.5 dB Confirm that the LINE O

41、UT level does not change in playback mode while changing the mode from playback to stop several times. Adjustment Location: MAIN board (See page 14.) 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-CH peak L-CH peak L-CH peak screw po

42、sition 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 set frequency counter 47 k LINE OUT test tape WS-48B (3 kHz, 0 dB) set test tape P-4-L300 (315 Hz, 0 dB) le

43、vel meter LINE OUT 47 k 13 Bias Consumption Current Adjustment DECK A DECK B This adjustment should be performed when replacing the head assy or the bias oscillator transformer (T131, T141),(T231, T241). Setting: REC LEVEL knob : standard recording position (See page 11.) Procedure: 1. Connect the d

44、igital voltmeter to test point TP331 ( DECK A) and TP441 (DECK B). 2. Set DECK A: RV131 (L-CH), RV231 (R-CH) and DECK B: RV141 (L-CH), RV241 (R-CH) to mechanical center. 3. Press the button to playback. 4. Adjust DECK A: T131 (L-CH), T231 (R-CH) and DECK B: T141 (L-CH), T241 (R-CH) so that the digit

45、al voltmeter reading becomes minimum. Adjustment Value: Maximum 220 mV Adjustment Location: MAIN board (See page 14.) Record Bias Adjustment DECK A DECK B Setting: REC LEVEL knob : standard record position (See page 11.) Procedure: 1. Set to test mode (See page 11.) 2. Insert a tape into deck B, press the REC r button and then press the button to start recording. Adjustme