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Sony TC-KB920S, Service Manual

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Sony TC-KB920S Service Manual Download Page 7

– 7 –

FITTING  BASE  BLOCK

HEAD

1

three screws
(PTPWH2 

×

 23)

Note:

 When installing,

pull the FR belt
and put around the
claws as shown below.

Note:

 When installing, pull the capstan belt

and put around the claws as shown below.

2

fitting base block

1

screw
(B2 

×

 4)

4

five screws
(B2 

×

 4)

5

record/
playback
head

6

head blacket

7

three RPH springs

2

erase
head

3

washer

Summary of Contents for TC-KB920S

Page 1: ...ort Mechanism Type TCM 190VB14 SPECIFICATIONS TC KB920S Dolby noise reduction and HX Pro headroom ex tension manufactured under license from Dolby Laboratories 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 ...

Page 2: ...ever reuse a disconnected chip component Notice that the minus side 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 SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB LISH...

Page 3: ... Printed Wiring Board MAIN Section 19 5 5 Schematic Diagram MAIN Section 1 2 21 5 6 Schematic Diagram MAIN Section 2 2 23 5 7 Printed Wiring Board DOLBY S Section 25 5 8 Schematic Diagram DOLBY S Section 25 5 9 Printed Wiring Boards POWER Section 27 5 10 Schematic Diagram POWER Section 28 5 11 Printed Wiring Boards PANEL Section 29 5 12 Schematic Diagram PANEL Section 31 5 13 IC Pin Function Descr...

Page 4: ... 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 Cassette holder 9 EJECT button º AUTO CAL button DOLBY NR switch BIAS control BALANCE control CAL REC LEVEL control MONITOR button REC LEVEL control AMS is an abbreviation for Automatic Music Sensor ...

Page 5: ...rews and remove the case 1 three flat cables CN803 805 2 connector CN704 4 claw 4 claw 3 screw BVTP3 8 2 two connectors CNP304 CN801 2 five connectors CNP301 303 305 306 3 four screws BVTP3 8 5 front panel section 4 two screws BVTT2 6 8 5 two screws BVTP2 6 8 6 Remove the MD ass y section to direction of arrow A A 2 two claws 3 cassette lid ass y 2 two claws 1 Push the eject button ...

Page 6: ...BOARD CASSETTE HOLDER R ASS Y 1 connector CN701 5 three PC board holders 4 screw BV ring 2 screw BV ring 4 two screws BVTP3 8 6 MAIN board 3 bracket TR 2 boss 4 cassette holder R ass y 3 shaft 1 torsion spring ...

Page 7: ... pull the FR belt and put around the claws as shown below Note When installing pull the capstan belt and put around the claws as shown below 2 fitting base block 1 screw B2 4 4 five screws B2 4 5 record playback head 6 head blacket 7 three RPH springs 2 erase head 3 washer ...

Page 8: ... 8 AUDIO BOARD AND MOTOR 1 connector CNP71 2 flexible board CNP72 6 capstan motor 3 claw 5 two screws B2 6 3 7 two screws P2 6 2 8 9 belt FR 0 ground plate 8 reel motor 4 audio board ...

Page 9: ...but loosen them if the tape begins to curl on the top side outer side Mode Torque Meter Meter Reading Forward CQ 102C 30 to 65 g cm 0 42 to 0 90 oz inch Forward back CQ 102C 1 to 6 g cm tension 0 014 to 0 08 oz inch FF REW CQ 201B 70 to 120 g cm 0 98 to 1 66 oz inch 2 Declination Adjustment While in the record playback position set the back tension to 0 wind the supply reel with something thin lik...

Page 10: ...evel 0 5 V 3 8 dB Test Tape Type Signal Used for P 4 A100 10 kHz 10 dB Azimuth Adjustment P 4 L300 315 Hz 0 dB Playback Level Adjustment WS 48B 3 kHz 0 dB Tape Speed Adjustment set 47 k Ω LINE OUT LINE IN 600 Ω 10 k Ω 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 m...

Page 11: ...st tape WS 48B 3 kHz 0 dB 47 k Ω set LINE OUT 47 k Ω test tape P 4 L300 315 Hz 0 dB level meter Bias Consumption Current Adjustment Procedure 1 Set RV103 L CH and RV203 R CH to mechanical center and turn the set recording mode 2 Connect digital voltmeter as shown by the following table 3 Adjust the following transformers for the minimum readings on the digital voltmeter Measurement Point Adjustmen...

Page 12: ... RV102 L CH and RV202 R CH so that the differ ence between R CH and L CH at 10 kHz is within 1 dB 4 Adjust RV306 so that the R CH meet the specification Adjustment Limits 10 kHz level difference against 315 Hz reference 0 1 0 dB Adjustment Location MAIN board set 47 k Ω AF OSC Attenuator 600 Ω 10 k Ω CS 123 blank tape LINE OUT level meter LINE IN 315 Hz 50 mV 23 8 dB set 47 k Ω AF OSC Attenuator L...

Page 13: ... Boards X parts extracted from the component side Y parts extracted from the conductor side b Pattern from the side which enables seeing Abbreviation AUS Australian model MY Malaysia model SP Singapore model Indication of transistor U B Line V B Line H adjustment for repair Voltages and waveforms are dc with respect to ground under no signal conditions no mark PB REC Voltages are taken with aVOM I...

Page 14: ... 15 16 TC KB920S 5 2 PRINTED WIRING BOARDS MD Section See page 13 for Circuit Boards Location Page 19 Page 19 ...

Page 15: ... 17 5 3 SCHEMATIC DIAGRAM MD Section TC KB920S The components identified by mark or dotted line with mark are critical for safety Replace only with part number specified Page 24 Page 24 ...

Page 16: ...26 4 Vp p 6 4 µs 4 5 Vp p 6 4 µs 23 2 Vp p 6 4 µs 3 8 Vp p 6 4 µs 148 Vp p 6 4 µs 30 Vp p 6 4 µs 4 1 Vp p 4 MHz IC Block Diagram IC803 BA6219B MAIN BOARD 1 2 3 4 5 6 7 8 9 10 GND MOTOR DRIVE NOISE FILTER CLAMP FWD IN REV IN VCC 1 VCC 2 NOISE FILTER MOTOR DRIVE MOTOR DRIVE MOTOR DRIVE T S D O C P FWD REV STOP CONTROL LOGIC ...

Page 17: ... 4 D803 C 4 D804 C 4 D814 E 5 D815 E 5 IC301 C 9 IC302 H 7 IC303 E 7 IC304 B 7 IC305 F 4 IC306 H 5 IC307 E 9 IC308 I 6 IC309 I 5 IC310 G 9 IC311 G 9 IC701 I 3 IC801 D 2 IC803 F 2 IC804 D 4 Q101 D 9 Q102 H 5 Q103 H 8 Q105 F 7 Q201 D 10 Q202 I 8 Q203 I 8 Q205 F 7 Q301 G 5 Q302 D 6 Q303 D 6 Q304 D 6 Q305 C 6 Q306 C 6 Q307 A 7 Q308 A 7 Q309 A 7 Q310 C 6 Q311 C 6 Q312 I 6 Q313 I 5 Q314 I 5 Q315 F 9 Q31...

Page 18: ...AGRAM MAIN Section 1 2 See page 18 for Waveforms Page 26 Page 31 Page 26 Page 26 Page 26 Page 31 Page 23 Page 23 The components identified by mark or dotted line with mark are critical for safety Replace only with part number specified ...

Page 19: ...ion 2 2 See page 18 for Waveforms and IC Block Diagram Page 31 Page 22 Page 31 Page 22 Page 31 The components identified by mark or dotted line with mark are critical for safety Replace only with part number specified Page 17 Page 17 Page 28 Page 28 ...

Page 20: ...SOUT MCBO VCC IREF SCBOL TCS2L TCS1L FBOL TCF1L TCF2L 4 LFIN 3 TCL2 ZL2 5 9 8 7 6 TCL1 SCINH TCS1H ZL1 HLSMP MCTC 10 11 12 13 VCT 14 VEE 15 24 25 26 27 28 29 30 20 21 22 23 19 17 18 16 TCS2H TCF2H FBOH TCF1H ANTSAT FLVCR SLVCR FHVCR LFICG LFVCR LFDET SHVCR SLDET SLICG SHICG SHDET FLDET FHDET FLICG FHICG V TO I CONV H V TO I CONV H VREF IREF MC4 MC3DS MC3DT MC2 MC1 MC4 MC3 MC1 MC Page 19 20 Page 21...

Page 21: ... 13 for Circuit Boards Location 5 10 SCHEMATIC DIAGRAM POWER Section Page 27 Page 27 28 Page 19 Page 19 Page 27 Page 27 Page 27 The components identified by mark or dotted line with mark are critical for safety Replace only with part number specified Page 24 Page 24 ...

Page 22: ... 29 30 TC KB920S 5 11 PRINTED WIRING BOARDS PANEL Section See page 13 for Circuit Boards Location Page 19 Page 19 Page 20 Page 20 Page 19 ...

Page 23: ... 31 32 TC KB920S 5 12 SCHEMATIC DIAGRAM PANEL Section Page 24 Page 23 Page 23 Page 21 Page 22 ...

Page 24: ...h low control signal output terminal L frequency low 38 CAL ON OFF O Calibration tone on off control signal output terminal H on L off 39 REC M ON OFF O Record muting on off control signal output to the CXA1598S IC303 L record muting on 40 BIAS ON OFF O Recording bias on off control signal output terminal H bias on 41 DOL CON O Dolby B C type or dolby on off selection signal output to the CXA1563S...

Page 25: ...MY SP Abbreviation AUS Australian MY Malaysia SP Singapore 1 2 1 10 2 2 not supplied not supplied FRONT PANEL SECTION 1 1 1 AEP MY SP A A 1 not supplied not supplied T701 MY SP 2 2 2 3 4 6 13 11 5 including rA 8 13 13 12 9 7 AUS 7 rA rB rC MY SP T701 AEP AUS 1 X 4949 523 1 FOOT ASSY F50180S 2 3 710 901 11 SCREW TAPPING BLACK 2 3 710 901 01 SCREW TAPPING SILVER 3 3 021 377 01 CASE BLACK 3 3 021 377...

Page 26: ...8 4 951 620 01 SCREW 2 6X8 BVTP 59 1 777 109 11 WIRE FLAT TYPE 39 CORE 60 A 2007 775 A PANEL BOARD COMPLETE AEP AUS 60 A 2007 777 A PANEL BOARD COMPLETE MY SP 61 3 020 975 01 BUTTON CONTROL BLACK 61 3 020 975 11 BUTTON CONTROL SILVER 62 3 020 977 01 BUTTON AUTO CAL BLACK 62 3 020 977 11 BUTTON AUTO CAL SILVER 63 3 933 299 01 KNOB DIA 12 BLACK 63 3 933 299 11 KNOB DIA 12 SILVER 64 X 3375 507 1 BASE...

Page 27: ...E 7 CORE 105 3 354 957 01 JOINT LOCK LEVER 106 3 354 954 01 LEVER LOCK LEVER R 107 3 354 962 01 SPRING EJ SAFTY SPRING R 108 3 354 956 01 LEVER EJ SAFTY LEVER R 109 3 354 960 01 SPRING LOADING R TORSION Ref No Part No Description Remark Ref No Part No Description Remark 3 MD ASS Y SECTION 5 TCM 190VB14 101 109 108 107 106 105 104 103 102 ...

Page 28: ...ING CASSETTE RETAINER LEAF 164 3 359 424 01 GEAR REV GEAR 165 3 575 321 00 RETAINER THRUST CAPSTAN 166 X 3366 971 1 TABLE ASSY B REEL 167 3 362 308 01 CAP REEL 168 3 356 713 01 WASHER 169 X 3366 047 1 LEVER PINCH F ASSY 170 X 3369 024 1 SLIDER HEAD CHASSIS ASSY HE301 1 543 673 11 HEAD MAGNETIC ERASE HRP301 1 543 733 11 HEAD MAGNETIC RECORD PLAYBACK M901 X 3363 501 2 MOTOR ASSY REEL M902 X 3374 302...

Page 29: ...RIGGER SPRING TORSION 207 X 3366 569 1 ARM ASSY FR 208 3 359 419 11 GEAR FR GEAR 209 3 359 421 01 CLUTCH REEL DISK 210 3 359 418 01 PULLEY FR PULLEY 211 3 924 185 11 SPRING FR ARM TORSION 212 3 936 483 01 GEAR CAM GEAR 213 3 359 448 01 GEAR TRIGGER Ref No Part No Description Remark Ref No Part No Description Remark 201 202 203 204 205 206 207 208 209 210 211 212 213 5 MECHANISM DECK SECTION 2 TCM ...

Page 30: ...OR RV71 1 241 761 11 RES ADJ CARBON 1K A 2007 481 A DOLBY S BOARD COMPLETE CAPACITOR C1 1 136 165 00 FILM 0 1uF 5 50V C2 1 163 012 00 CERAMIC CHIP 0 0018uF 10 50V C3 1 163 012 00 CERAMIC CHIP 0 0018uF 10 50V C4 1 164 222 11 CERAMIC CHIP 0 22uF 25V C5 1 136 165 00 FILM 0 1uF 5 50V C6 1 136 165 00 FILM 0 1uF 5 50V C7 1 137 372 11 FILM 0 022uF 5 50V C8 1 164 222 11 CERAMIC CHIP 0 22uF 25V C9 1 126 30...

Page 31: ...0 FILM 0 1uF 5 50V C106 1 136 163 00 FILM 0 068uF 5 50V C107 1 126 964 11 ELECT 10uF 20 50V C110 1 126 959 11 ELECT 0 47uF 20 50V C111 1 126 964 11 ELECT 10uF 20 50V C112 1 126 963 11 ELECT 4 7uF 20 50V C113 1 137 428 11 FILM 180PF 5 50V C114 1 136 935 11 FILM 22PF 5 630V C115 1 137 429 11 FILM 270PF 5 50V C116 1 130 474 00 MYLAR 0 0018uF 5 50V C117 1 130 487 00 MYLAR 0 022uF 5 50V C118 1 107 714 ...

Page 32: ...ERAMIC 0 1uF 50V C716 1 126 947 11 ELECT 47uF 20 35V C805 1 164 159 11 CERAMIC 0 1uF 50V C806 1 164 159 11 CERAMIC 0 1uF 50V C809 1 126 959 11 ELECT 0 47uF 20 50V C811 1 164 159 11 CERAMIC 0 1uF 50V C813 1 126 959 11 ELECT 0 47uF 20 50V C830 1 164 159 11 CERAMIC 0 1uF 50V C831 1 104 665 11 ELECT 100uF 20 10V CONNECTOR CN101 1 695 087 11 PIN CONNECTOR PC BOARD 7P CN102 1 695 087 11 PIN CONNECTOR PC...

Page 33: ...80 TRANSISTOR DTC114ES Q701 8 729 141 83 TRANSISTOR 2SB1094 LK Q702 8 729 209 15 TRANSISTOR 2SD2012 Q703 8 729 141 83 TRANSISTOR 2SB1094 LK Q704 8 729 119 78 TRANSISTOR 2SC403SP 51 Q705 8 729 209 15 TRANSISTOR 2SD2012 Q706 8 729 119 78 TRANSISTOR 2SC403SP 51 Q707 8 729 119 76 TRANSISTOR 2SA1175 HFE Q708 8 729 140 04 TRANSISTOR 2SB1116A L Q802 8 729 900 89 TRANSISTOR DTC144ES Q803 8 729 900 65 TRAN...

Page 34: ... 872 11 CARBON 51K 5 1 4W R315 1 247 866 11 CARBON 30K 5 1 4W R316 1 247 872 11 CARBON 51K 5 1 4W R317 1 249 435 11 CARBON 33K 5 1 4W R318 1 247 864 11 CARBON 24K 5 1 4W R319 1 249 436 11 CARBON 39K 5 1 4W R320 1 249 435 11 CARBON 33K 5 1 4W R321 1 247 856 00 CARBON 11K 5 1 4W R322 1 249 432 11 CARBON 18K 5 1 4W R323 1 247 864 11 CARBON 24K 5 1 4W R324 1 247 874 11 CARBON 62K 5 1 4W R325 1 247 862...

Page 35: ...ARBON 47K RV103 1 241 765 11 RES ADJ CARBON 22K RV121 1 241 763 11 RES ADJ CARBON 4 7K RV201 1 241 765 11 RES ADJ CARBON 22K RV202 1 238 019 11 RES ADJ CARBON 47K RV203 1 241 765 11 RES ADJ CARBON 22K RV221 1 241 763 11 RES ADJ CARBON 4 7K RV306 1 241 763 11 RES ADJ CARBON 4 7K TRANSFORMER T101 1 433 344 11 TRANSFORMER BIAS OSCILLATION T201 1 433 344 11 TRANSFORMER BIAS OSCILLATION T301 1 423 614 ...

Page 36: ... 1 136 165 00 FILM 0 1uF 5 50V CONNECTOR CNP701 1 564 513 11 PLUG CONNECTOR 10P CNP701 1 764 333 11 PIN CONNECTOR PCB V TYPE 10P CNP702 1 580 230 31 PIN CONNECTOR PC BOARD 2P PANEL REC VOL TRANSFORMER TRANS 1 TRANS 2 LINE FILTER LF701 1 424 485 11 FILTER LINE TRANS 1 BOARD MY SP Included in PANEL BOARD COMPLETE CONNECTOR CNP702 1 580 230 31 PIN CONNECTOR PC BOARD 2P LINE FILTER LF701 1 424 485 11 ...

Page 37: ...iption Remark ACCESSORIES PACKING MATERIALS 1 776 263 11 CORD CONNECTION AUDIO 1 5m 3 862 301 11 MANUAL INSTRUCTION ENGLISH FRENCH SPANISH PORTUGUESE 3 862 301 21 MANUAL INSTRUCTION GERMAN DUTCH SWEDISH ITALIAN AEP 3 862 301 31 MANUAL INSTRUCTION CHINESE MY SP ...

Page 38: ... 48 TC KB920S Sony Corporation Home A V Products Company 9 922 816 11 98D0564 1 Printed in Japan 1998 4 Published by Quality Assurance Dept Shibaura ...

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