Sony-TCKB820S-tape-sm 电路图 维修手册.pdf

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1、MICROFILM SERVICE MANUAL STEREO CASSETTE DECK AEP Model UK Model Australian Model Model Name Using Similar MechanismTC-KE400S Tape Transport Mechanism TypeTCM-190VB12CSS SPECIFICATIONS TC-KB820S Dolby noise reduction and HX Pro headroom ex- tension manufactured under license from Dolby Laboratories

2、Licensing Corporation. HX Pro origi- nated by Bang & Olufsen. “DOLBY”, the double-D symbol a, and “HX PRO” are trademarks of Dolby Laboratories Licensing Cor- poration. Continued on next page RadioFans.CN 收音机爱 好者资料库 2 Flexible Circuit Board Repairing Keep the temperature of the soldering iron around

3、 270 C dur- ing repairing. Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when soldering or unsoldering. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus s

4、ide of a tantalum capacitor may be dam- aged by heat. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED 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 SHO

5、WN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. MODEL IDENTIFICATION BACK PANEL 3-020-983- AEP Model: 0 ? UK Model: 1 Australian Model: 2 RadioFans.CN 收音机爱 好者资料库 3 TABLE OF CONTENTS 1.GENERAL. 4 2.DISASSEMBLY.5 3.MECHANICAL ADJUSTMENTS. 9 4.ELECTRICAL ADJUSTMENTS. 10 5.DIAGRAMS 5-1.Note for

6、 Printed Wiring Boards and Schematic Diagrams . 14 5-2.Printed Wiring Boards MD Section . 15 5-3.Schematic Diagram MD Section . 17 5-4.Printed Wiring Board MAIN Section . 19 5-5.Schematic Diagram MAIN Section (1/3). 21 5-6.Schematic Diagram MAIN Section (2/3). 23 5-7.Schematic Diagram MAIN Section (

7、3/3). 25 5-8.Printed Wiring Board DOLBY-S Section . 29 5-9.Schematic Diagram DOLBY-S Section . 29 5-10. Printed Wiring Boards PANEL Section . 31 5-11. Schematic Diagram PANEL Section . 33 5-12. IC Pin Function Description . 35 6.EXPLODED VIEWS. 37 7.ELECTRICAL PARTS LIST. 42 RadioFans.CN 收音机爱 好者资料库

8、4 SECTION 1 GENERAL LOCATION OF CONTROLS 1 I/O (Power) button 2 Remote control sensor 3 PHONES jack 4 Display panel 5 Tape operation buttons AMS* 0 button button AMS* ) button p button P PAUSE button R REC MUTING button r REC button 6 Tape counter 7 Counter buttons RESET button MEMORY button 8 Casse

9、tte holder 9 EJECT button ! AUTO CAL button ! DOLBY NR switch ! BALANCE control ! REC LEVEL control * AMS is an abbreviation for Automatic Music Sensor. 5 FRONT PANEL SECTION MD ASSY SECTION Note: Follow the disassembly procedure in the numerical order given. SECTION 2 DISASSEMBLY CASE Unscrew the f

10、our case attachment seven tapping screws and remove the case. 1flat cable (CN801) 3screw (BVTP3 8) 5four screws (BVTP3 8) 7two connectors (CNP31, 33) 5screw (BVTP3 8) 6claw 6claw 1flat cable (CN504) 4two earth lugs 2connector (CN704) 1flat cable (CN81) 2connector (CN506) 8front panel section 4two sc

11、rews (BVTT2.6 8) 6Remove the MD assy section to direction of arrow A . 5two screws (BVTP2.6 8) 2two claws 1push the eject button. 2two claws 3cassette lid assy A 6 MAIN BOARD CASSETTE HOLDER (R) ASSY 4two screws (BVTP3 8) 2screw (BV/ring) 5MAIN board 1connector (CN701) 4screw (BV/ring) 3bracket (TR)

12、 2boss 3shaft 1torsion spring 4cassette holder (R) assy 7 FITTING BASE BLOCK HEAD 2two screws (PTPWH2 23) 2screw (PTPWH2 23) Note: When installing, pull the FR belt and put around the claws as shown below. 1connector (CNP32) 3fitting base block Note: When installing, pull the capstan belt and put ar

13、ound the claws as shown below. 2screw (B2 10) 1connector (CNP32) 4azimuth screw 5record/playback head 6compression spring 3erase head 8 MOTOR 5two screws (B2.6 3) 7two screws (P2.6 2.8) 2flexible board (CNP72) 1connector (CNP71) 3claw 3claw 3two claws 6capstan motor !ground plate 4audio board 8reel

14、motor 9FR belt 9 SECTION 3 MECHANICAL ADJUSTMENTS PRECAUTION 1.Clean the following parts with a denatured alcohol-moistened swab: record/playback/erase headpinch roller rubber beltscapstan idler 2.Demagnetize the record/playback head with a head demagne- tizer. (Head demagnetizer do not approach for

15、 the erase head.) 3.Do not use a magnetized screwdriver 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 Readi

16、ng ForwardCQ-102C 30 to 60 gcm (0.42 to 0.83 ozinch) Forward backCQ-102C 2 to 7 gcm tension (0.03 to 0.09 ozinch) FF/REWCQ-201B 70 to 110 gcm (0.98 to 1.52 ozinch) 10 SECTION 4 ELECTRICAL ADJUSTMENTS Note: The adjustment should be performed in the order given in the ser- vice manual. As a rule, adju

17、stments about playback should be per- formed before those about recording. The adjustments should be performed before for both L-CH and R- CH. Switches and controls should be set as follows unless otherwise specified. DOLBY NR, MPX FILTER switch: OFF Standard Record: Deliver the standard input signa

18、l level to the input jack and set the REC LEVEL control to obtain the standard output signal level. Record Mode 0 dB = 0.775 V Standard Input Level input terminalLINE IN source impedance10 k input signal level0.5 V (3.8 dB) Standard Output Level output terminalLINE OUT load impedance47 k output sign

19、al level0.5 V (3.8 dB) Test Tape TypeSignalUsed for P-4-A10010 kHz, 10 dBAzimuth Adjustment P-4-L300315 Hz, 0 dBPlayback Level Adjustment WS-48B3 kHz, 0 dBTape Speed Adjustment Test Mode 1.Insert a short-circuit plug into TP801 (2P) and turn ON the power switch. (Earth pin & of IC801 and turn ON the

20、 power switch.) At first, all the fluorescent tubes light up, then the system re- turns to normal display. (However, “00 00” is not displayed on the counter.) 2.To release the test mode, remove the short plug and turn off the power switch. 3.Remove the short plug after completion of adjustment. + se

21、t 47 k LINE OUTLINE IN 600 10 k attenuator AF OSC level meter Record/Playback Head Azimuth Adjustment Procedure: 1.Mode : FWD playback 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

22、1 dB. 3.Phase Check Mode : playback 4.After the adjustment, lock the screw with locking compound. Adjustment Location: Record/Playback head + set 47 k LINE OUT level meter Test tape P-4-A100 (10 kHz, 10 dB) Screw position L-CH peak within 1dB output level L-CH peakR-CH peak within 1dB angle R-CH pea

23、k + VH + Screen pattern GoodWrong in phase 45 90 135 180 LINE OUT set R-CH L-CH47 k 47 k oscilloscope test tape P-4-A100 (10 kHz, 10 dB) Adjustment screw 11 Tape Speed Adjustment Procedure: Mode: playback 1.Set to FWD playback mode. 2.Adjust RV71 so that the frequency counter reading becomes 3,000 9

24、0 Hz. 3.If, the frequency counter reading does not become 3,000 90Hz. Turn RV72 and back to 1st. step again. Note: Turn RV72 to clockwise Tape speed becomes fast. Turn RV72 to counter clockwise Tape speed becomes slow. 4.Frequency difference between the beginning and the end of the tape should be wi

25、thin 1%. Adjustment Location: AUDIO board (See page 12.) Sample value of Wow and Flutter: 0.3% or less W.RMS (JIS) (WS-48B) Playback Level Adjustment Procedure: Mode: playback Adjust RV11 (L-CH) and RV21 (R-CH) so that the reading on level meter meets the adjustment limits below. Adjustment Limits:

26、LINE OUT level: 7.70.5 dB (0.301 to 0.338 V) Level difference between channels: within 0.5 dB Check that the LINE OUT level does not change even if Playback and Stop operation is repeated several times. Adjustment Location: AUDIO board (See page 12.) + set LINE OUT frequency counter test tape WS-48B

27、 (3 kHz, 0 dB) 47 k + set LINE OUT 47 k test tape P-4-L300 (315 Hz, 0 dB) level meter Bias Consumption Current Adjustment Procedure: 1.Set RV81 (L-CH) and RV91 (R-CH) to mechanical center and turn the set recording mode. 2.Connect digital voltmeter as shown by the following table. 3.Adjust the follo

28、wing transformers for the minimum readings on the digital voltmeter. Measurement PointAdjustment PartValue L-CH1 and 2, TP321T81 minimum R-CH3 and 2, TP321T91 Adjustment Location: AUDIO board (See page 12.) Record Bias Adjustment Setting: REC LEVEL control: Standard Record (See page 10.) Procedure:

29、1.Mode: record 2.Mode: playback 3.Adjust RV81(L-CH) and RV91 (R-CH) so that 10 kHz play- back output is 00.5 dB relative to the 315 Hz output. Adjustment Location: AUDIO board (See page 12.) + set LINE IN (no signal) B+ (+7.5 V) TP81321 R-CH L-CH digital voltmeter CS-413 blank tape set AF OSC Attenu

30、ator LINE IN 315 Hz 10 kHz 50 mV (23.8 dB) 600 10 k CS-123 blank tape + set LINE OUT 47 k recorded portion level meter 12 Record Level Adjustment Setting: REC LEVEL control: Standard Record (See page 10.) Procedure: 1.Mode: record 2.Mode: playback 3.Adjust RV111 (L-CH) and RV211 (R-CH) so that the r

31、eading on level meter meets the adjustment limits below. Adjustment Limits: 3.8 0.5 dB (0.47 to 0.53 V) Adjustment Location: MAIN board AUDIO BOARD SIDE A set AF OSC Attenuator 600 10 k CS-123 blank tape LINE IN 315 Hz, 0.5 V (3.8 dB) + set LINE OUT 47 k recorded portion level meter Adjustment Locat

32、ion: MAIN BOARD COMPONENT SIDE DOLBY-S BOARD RV211 RV111 J501 CN831CN833 TP801 RV72 RV71 RV21 RV11 T81 T91 RV81 IC31 TP81 RV91 13 14 SECTION 5 DIAGRAMS Circuit Boards Location TRANSFORMER board AC POWER SW board HP board PANEL board LEAF SW board REC VOL board DOLBY-S boards MAIN board AUDIO board 5

33、-1.NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS (In addition to this, the necessary note is each block.) Note on Schematic Diagram: All capacitors are in F unless otherwise noted. pF: F 50 WV or less are not indicated except for electrolytics and tantalums. All resistors are in and 1/4 W or

34、 less unless otherwise specified. : internal component. 2 : nonflammable resistor. C : panel designation. U : B+ Line. V : B Line. Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : PB () : REC : Impossible to measure Voltages are taken with a VOM (Input imped

35、ance 10 M). Voltage variations may be noted due to normal produc- tion tolerances. Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal produc- tion tolerances. Circled numbers refer to waveforms. Signal path. E: PB a: REC Note: The components identified by mark ! o

36、r dotted line with mark ! are critical for safety. Replace only with part number specified. Note on Printed Wiring Boards: X : parts extracted from the component side. Y : parts extracted from the conductor side. r: Through hole. b : Pattern from the side which enables seeing. (The other layers patt

37、erns are not indicated.) Caution: Pattern face side:Parts on the pattern face side seen from (Side B)the pattern face are indicated. Parts face side:Parts on the parts face side seen from (Side A)the parts face are indicated. Indication of transistor. B These are omitted. CE Q B These are omitted. C

38、E Q 15 16 TC-KB820S 5-2.PRINTED WIRING BOARDS MD Section See page 13 for Circuit Boards Location. Semiconductor Location Ref. No.Location D31C-1 IC31C-2 IC81B-3 IC81G-4 Q51B-2 Q52B-2 Q53B-2 Q71C-4 (Note) :LEAF SW BOARD (Page 20) (Page 19) (Page 19) TC-KB820S 18 17 5-3.SCHEMATIC DIAGRAM MD Section Se

39、e page 27 for Waveforms. (Page 21) (Page 21) (Page 23) 19 20 TC-KB820S 5-4.PRINTED WIRING BOARD MAIN Section See page 13 for Circuit Boards Location. Semiconductor Location Ref. No.Location D131C-5 D132C-5 D231C-5 D232C-5 D511B-7 D512B-7 D513E-7 D551B-5 D701G-2 D702G-2 D703G-2 D704G-2 D705F-2 D706F-

40、2 D707F-2 D708G-3 D709G-5 D710F-3 D711F-4 D712F-3 D713E-1 D714E-3 D715F-4 D801D-2 D802D-2 IC501C-9 IC502F-9 IC503D-6 IC504C-5 IC505D-5 IC506A-9 IC507C-7 IC508B-4 IC509C-4 IC510B-6 IC511F-10 IC512D-9 IC601A-3 IC701G-4 IC801B-2 IC802D-2 Q101A-8 Q102B-8 Q103E-8 Q121F-6 Q122D-7 Q201A-8 Q202B-10 Q203E-9

41、Q221F-6 Q222D-7 Q503E-8 Q511B-6 Q512B-7 Q521F-7 Q531B-5 Q532B-5 Q551A-5 Q572F-7 Q573C-7 Q601B-3 Q701G-6 Q702G-5 Q704G-4 Q705F-3 Q707F-3 Q708F-2 Q805D-2 (Page 32) (Page 31)(Page 15) (Page 32)(Page 31) (Page 29) (Page 29) (Page 15)(Page 15) TC-KB820S 22 21 5-5.SCHEMATIC DIAGRAM MAIN Section (1/3) (Pag

42、e 30) (Page 34) (Page 18) (Page 18) (Page 30) (Page 23) (Page 23) The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. 23 24 TC-KB820S 5-6.SCHEMATIC DIAGRAM MAIN Section (2/3) See page 27 for Waveforms. (Page 22) (Page 22) (

43、Page 18) (Page 25) (Page 25) TC-KB820S 26 25 5-7.SCHEMATIC DIAGRAM MAIN Section (3/3) See page 28 for IC Block Diagrams. The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. (Page 33) (Page 33) (Page 34) (Page 24) (Page 24)

44、27 28 Waveforms AUDIO BOARD 1 T51 1 2 Q51 C, Q52 C 3 T81 4 4 T91 4 6 IC81 !, ! MAIN BOARD (2/3) 1 IC801 # 5 IC81 7, 8 118 Vp-p 9.3 s 26.4 Vp-p 9.3 s 63.2 Vp-p 9.3 s 64.8 Vp-p 9.3 s 6.4 Vp-p 9.3 s 4.3 Vp-p 6 MHz 6.2 Vp-p 9.3 s IC Block Diagrams 21 RECOUT SCINL ANTSAT MC3IN MC4IN HLSOUT MCBO VCC IREF

45、SCBOL TCS2L TCS1L FBOL TCF1L TCF2L 4 LFIN 3 TCL2 ZL2 59876 TCL1 SCINH TCS1H ZL1 HLSMP MCTC 10 11 12 13 VCT 14 VEE 15 242526272829302021222319171816 TCS2H TCF2H FBOH TCF1H ANTSAT FLVCRSLVCR FHVCR LFICGLFVCR LFDET SHVCR SLDETSLICG SHICGSHDET FLDET FHDET FLICG FHICG V TO I CONV H V TO I CONV H VREF & I

46、REF MC4 MC3DS MC3DT MC2 MC1 MC4 MC3 MC1 MC IC1CXA1917AM-T6 (DOLBY-S BOARD) IC502CXA1579P (MAIN BOARD) 21 MUTE R.CAL G.CAL IN I.REF BOOST VCC OUT 435 9 876 VEE IN 10111213 GND 14 BOOST 1516 70US METAL OUT SPEED CONTROLREC EQ AMP REC EQ AMP BIAS + VGS VEE VCC 30 29 TC-KB820S 5-9.SCHEMATIC DIAGRAM DOLB

47、Y-S Section See page 28 for IC Block Diagrams. 5-8.PRINTED WIRING BOARD DOLBY-S Section See page 13 for Circuit Boards Location. (Page 21) (Page 20) 31 32 TC-KB820S 5-10.PRINTED WIRING BOARDS PANEL Section See page 13 for Circuit Boards Location. (Page 19) (Page 19) (Page 32) (Page 32) (Page 19) (Page 20) TC-KB820S 34 33 5-11.SCHEMATIC DIAGRAM PANEL Section The components identified by mark ! or dotted line with mark ! are critical for safety. Replace onl