Sony BT-50 Service Manual Download

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Summary of Contents for BT-50

Page 1: ...del 6W with AC 9W or AC 9 9W with AC 15 9VA with AC 456C 7 4 VA at 50 Hz with AC 4W 6 SVA at 60Hz with AC 4W 360mW max I USA Canada E AEP Model 320 mW max UK Model Q ther Jack Battery life Dimensions Weight Speaker 5 cm 2 inches dia Recording System Tape Speed 2 track 1 channel monaural 4 8 cm sec 17 s ips US Model Canadian Model E Madel AEP Model UK 11 odel Approx 1 min 50 sec with SONY Cassette ...

Page 2: ...SI REC PB PB REC AGC 03 l _ _ _ 02 _ i METER AWP 06 S5 MUSIC SPEECH SPEECH MUSIC METER SWITCHING 05 S4 1 o BATT V S1 4 9 CHECK S2 POWER BIAS OSC 04 RIPPLE FILTU Q7 TURNS ON WIO HIE PLAYBACK AIST FORMRO REC000 OR REWIND aITTOII IS PUSIIEO r r t J_ CNJ MOTOR CfllVER 08 I I I L__ J I I J3 _ 1 o JIREMOTE 2 S3 S TART STOP L o n START t I STOP n o 1 RECHARGEABLE BATTERY BP 28 OC IN 6V c i T L o 1 ORY BA...

Page 3: ... TC 150 B BT 50 stop of the reel spindle rotation and returns tape transport to stop mode This operation in playback mode is described as follows The operation in record mode is the same as in playback mode 0 0 0 pulley be dri belt friction pullr The motor rotatu the friction pulley clockwi O watlon or Nr II The pin of the shut off rAr A mow only within portion O b au th clockwiSII fore is applied...

Page 4: ...button forward button Wl len the tape stops tnwtling at cape end the friction p ullev dlrectlV connected with the take up rHI spindle stops moving The friction pullev th efor11 stops to applv the clockwi1t1 forC I to the detecting 11wtr The pin of the shut off ewtr A ptah the dettcting lever a shown below 4 forward button 0 I _ axis l friction pull v detecting lellflr shut off _ A The shut off ltl...

Page 5: ...am gear II The shut off lever S pushes the lock plate shut off tev r 8 The shut off aver geer con nected with the shut off lever A on the axis mown to n with thtl small gear axis The pin goes ro portion Ci through portion 0 5 TC 150 B BT 50 ...

Page 6: ... 2 DISASSEMBLY Note Use the same colour screws as the panel s Silver screws for TC lSO BT SO Black screws for TC 150B LOWER PANEL REMOVAL Se sure to use the screws specified ebove 6 CASSETTE LID REMC Note To avoid losint be sure to close CIRCUIT BOARD REI Circuit Board ...

Page 7: ...emove the cassette lid 0P2x4 toggle springs attached to the cassette lid the cassette lid and then remove it IDVAL Screw circuit board 7 TC 150 B BT 50 REEL PANEL REMOVAL G and MAIN CHASSIS REMOVAL PART 1 MAIN CHASSIS REMOVAL PART 2 ...

Page 8: ...50 Note Do not remove this screw usually If necessary to remove this screw do not lose the spring attached by this screw in side the case MOTOR REMOVAL Motor SHUT OFF BLOCK REMOVAL Lift the flywheel retainer 0_ P2x4 Lever A Ass y forward 8 ...

Page 9: ...urrent suddenly in creases and back it tum 4 Adjust the other screw in the same way as step 2 and 3 5 Secure the adjustment sc rews with locking compound adjustment screws 2 Pinch Roller Pressure Measurement playback mode Read the scale when the pinch roller just touches the capstan and starts to tum Permissible reading 200 300 g 7 11 oz Torque SONY To que Mete Forward CQ OlA CQ102A CQ 03A Fast Fo...

Page 10: ...mpound to the adjusted parts 4 The adjustments should be performed in the order listed in this service manual 5 The adjustments should be performed with the rated power supply voltage unless otherwise specified 1 Tape Speed Adjustment Settings Power source 6 V de Procedure 1 Mode playback w 49 SptJed checker SONY LFM 30 JkHz OdB or digital frequency counter S8t t4 J EARPHONE Speficications I I Spe...

Page 11: ...y appear take the highest adjustment screw Note When 0 25 2 S V ac range is not available on the VOM use a network as shown below 811 2W 3µF TOµF TC 150 B BT 3 REC BATT Meter calibration Setting Power source 3 6 V de Procedure I Push forward button without cassette 2 When power source is 3 6 V de the pointer should indicate as shown below pointer 3 If necessary solder 1 and 2 Soldering Portion Poi...

Page 12: ... 17µV 3 6kHz 2 Mode playback VTVM recorded portion set 10kfl E EARPHONE Recorded signal VTVM reading 333Hz Adjust VOLUME control for 10 dB 0 25 V 150Hz a t L LLLL LL 6 dB allowable range 6 kHz 7 Tl 7 l7lllll7lllll77 150Hz 333Hz 6kHz If necessary adjust by changing the soldering portions I 2 and 3 Soldering Portion 6kHz Level I down 2 t 3 up MEMO u oo oo 0 12 ...

Page 13: ...PL AY8AO FAST FORWARD RECORD OR REWIND BUTTON IS PUSHED BATTERY CASE ORG TOTAL CURRENT PLAYBACK IOOmA RECOR0 115mA REWIND IZ5mA FAST FORWARD IIOmA Y EL S4 rr o t s BATT C HECK _ a t K S5 MUSIC SPEECH SPEECH MUSIC BLK SP e n REC RECORD PB PLAYBACK l I 13 6 4 I0 65VI 0 7V OR RY 5 45 TC 150 B BT 50 re GRYJ GRYJ RED RPH PP134 36 IOVAC l 2 8 2 1 ...

Page 14: ...__________ _ _ _ ___JBRN GRY PH P134 36 2 MIN MAX R43 IOk C IPB VOL 7 DC RESISTANCE lcil ai O 3 3 2 t 0 001 YEL 14 01 2 2SC632A 03 4 6 7 2SC634A f 0 B 05 2SA678 t 08 2SC1474 E C s D1 2 3 4 5 1T40 D IC 1 CX 170 IS 41312111098 1 1 2 3 4 561 fTop l WWI IC 2 BX 295 Q 1234 M t ntf Note 8 pattern signal path ...

Page 15: ...5 lk 1 05 _ 0 035V r M I I I Q4 2SC634A BIAS OSC 0 03V _ I r n _ Ill RE Um L e mA ii DS 07 C25 R 31 06 1 2k 3 3 J OV O i t h 0 3V ER37 150 __k s aVJ l 7 I i C24 ME 4 7 l J I S4 BATT C REC BATT 0ECI _ Q7 2SC634A RIPPlE FILTER L Note All c apaciton are in siF unless otherwise noted 50 or les worki119 volts ere omitted except for electrolytic typlt p All resistors ere in n 1 16W uni oth ise noted k 1...

Page 16: ...S1 5 6V R38 56 I SW Gsp SQ J2 EARPHONE 0 001 lC31 S5 MUSIC SP ECH 4USIC SPhCH S3 START STOP START I i 0 221F STOF 1 I S ON WHE t THE PI AYBIO FAST FCR IWIO l_ RECOlll OR REWIND 1 BUTTON IS PUSHED o J I I I I J ORY BATTERY SIZE AA Total current is measured wittt no cassette loaded Switch Mode BP 28 IIEC OESIGIATIQt R 6 4FCS 6V Rsf No Switch S1 REC PB 52 POWER S3 START STOP 4 BATT CHECK S5 MUSIC SPE...

Page 17: ... Nota x Sil TC 150 BT 501 X B c t TC ISO I id A y r c udln _ _ o Items with no part number u d or no description ue not stodced beca they are seldom required for routine service o All setews are Phillips cross recess type unless otherwise noted slotted head o on shows the number of coils in spring ...

Page 18: ...3 tu5 U1 0 1 B Knob MU C ECH TC 150 ST 50 1 1 TC 150B __ __ I 3 6 81SflSOO L botlllry I 18 E__ jMM 1 601491 1 It EARPHONE J2 1 507491 1 8 Id MIC JI _ 1 5D1 19fl OO _ Jd REMOTt 131 U14 191 10 ct M C 10t12 MIC t Note o Items with no part number and or no description are not stocked because they aie seldom required for routine service o All screws are Phillips cross recess type unleu otherwise noted ...

Page 19: ... XI N MiUIJ ct _ _ E Ff41f EHi 3 68NJ 3 6lNWO t t 11 4 H fll IQ 1 1 X JfHHiOf 0 C Dl ltWy 1 d 2 2 tiuldo Y 20U 10 3 eounw _ _ __ X 3645 62 0 41 Brl Ckll Au y tifct _ U21 33f OO Gl if Jf o N ek I X 3 tiOfi 0 0 flndt Ro J y m P2 2 C mp Nd ir I _ 01 43 II II W plmk 2 mm diil t 02SJ Y1 3 645 543 00 41 l IW P2 f 3 645 50S O P 2 ti f P 1 7 3 3 545 641UID 6 Knob PB VOL lCl fill 1 1 c om PB VOL R43J P2 x3...

Page 20: ...lor Iver Crc mium plltl111 for cabined 7 627 553 17 7 627 553 57 7 627 SS3 77 Sllv r INlckeJ pi ting for m anilm l 7 623 553 13 7 623 553 23 7 623 553 33 7 623 553 83 7 627 452 03 1 62i 45 N8 Shl k AJ m oto eo 1111 J 527 14NIO l ull y J 1 222 6 19 XX ill 1 Ru ior variabi 10UI 1 8 VOL R43 B nd r r Ustor 3 545 658 OrnatnMI knob 3 545646 DO Knob START STOP B dc t rli H switch 1 514 264 QI Y IO i J 1 ...

Page 21: ... 7 1 1 6 SI c1 11 L 61 _ 0 u w1f dp u11oy I 3 UU 0 00 C Fir l H I I I I 3 101 4 3 11 3 Uli llUO o ffE l2 w 111 plutlc l 6mm cm ff6 llw tk 2 mmd I t 0 25 I X 3545 5 14 0 8 P 4y A y _ 3 101 4 36 0 I pl lk 1 Smm di P2 3 3 U1 1 M OI lt G26 J l p ti 4 3 646 5 0800 s X 3545 5 3 0 3 101 4 36 11 k1 L As y rwwind r i il tk 1 6mm d I l u 1 y Aa y E 1 2 I 3 1 lj r 1t I 3 521 IIJ 00 y t l l C O t d S p i t t ...

Page 22: ...A E 1 6 Ln BJ i 11111W a s 4u Pr2 I J ___ 598 00 II PZ 2 3 BJ f1JnCtlon o Items with no pa t number and or no description are not stocked because they a e seldom required for routine service o All screws are Phillips cross recess type unless otherwise noted slotted head o on shows the number of coils in spring DI UI 0 ...

Page 23: ...ise noted electrolytic type s W regular type carbon resistors are omitted Chec lc schematic diagram for resistance values 1 131 169 11 0 47 lc lOOO Cl lOV C2 1 131 202 11 1 5 2ov C3 1 131 173 11 33 lOY Rl 2 1 209 878 11 1 8 k C4 l 10S 669 12 0 0047 mylar R3 1 209 781 11 Ok C5 1 161 190 11 0 001 ceramk RS 1 210 381 11 33lc bo1111dary layer RlZ 1 209 768 11 2 2k R13 l 210 113 11 18k C6 1 105 669 12 ...

Page 24: ... 210 355 11 100 R43 1 222 699 XX l0 k variable PB VOL MISCELLANEOUS EH 8 825 566 00 Head erase EBFS 02B SWITCHES LI 1 407 847 00 Coil microinductor 35 µH M 8 834 221 01 1 Motor D 221F Sl l 513 323 00 Slide record playback ME 1 520 245 00 i Meter REC BATT S2 1 514 346 00 Leaf power MIC 8 814 191 10 Microphone electret S3 1 514 264 00 Slide START STOP condenser C 1002S S4 1 514 346 00 Leaf BATT CHEC...

Page 25: ...5 685 00 D Case carrying 0 I 0 I 0 I 0 I 0 0 0 I I I I 3 54S 691 00 Carton I I I I 0 I 0 I 0 I 0 I 0 Carton I I I 3 54S 718 00 I I 0 I I Carton BT SO I I I I 3 S4S 689 00 I I I I Sleeve carton I I I 3 54S 698 00 0 I I I I I I Sheet A protection I I I I 3 S4S 693 00 0 0 0 0 0 I I I I I I 3 54H94 00 Sheet B protection I 0 I 0 I 0 I 0 0 I I Spacer I I I 3 54S 707 00 0 I I I I I Manual instruction I I...

Page 26: ...s nk hlld screw RK tl t oval count9 1Unk Med 8 113 bindi _ T IND IM binding head 8 crew fot t flat fill_ _ _ _ RI filli ocrww av 3 braizw Ref Sh o tion TA PTP PTPWH PTTWH SC CJ SC CJ N w SW t LW 0 LW 0 e n G Sony Corporation 1976 2 o pt on Remaricl SELF TAPPING SCREWS self tapping screw pan hold self tapping screw pan head solf tapping screw with Mlh r face pen hnd thread rolling screw with washer...

Page 27: ...es File this supplement with the service manual Modal Applicable Serial No us l 6 00I and later Canadian 34 001 and later TC 150 AEP 38 001 and later UK 41 60I and later E 42 601 and later TC 150B AEP 33 401 and late r BT SO us 42 001 and later FomMr Type Slide Switch Type N w Type Pushbutton Switch Type US Model Canadian Model E Model AEP Model UK Model No 1 November 1976 SONY SERVICEMANUAL ...

Page 28: ...j lCI MUSIC MEHR SWITCHING Q D RP C SP I I f I t g 2 T CHlCK e S2 POWER PLAYBACK fl IST fORIIIIAO BIAS OSC Q RIPPU FILTER Q1 lURNS ON W N THE OR ll WIII0 SJTTON f l I o I Ill MOTOR UIIVER QB I I L ___ ___ ____ __ __ __ __ _ J t J3 R M O T E S3 IPAUSEI J I o n 7 o f I L L o 3 o l RECHARGEA8LE BATTERY BP 28 ORY BATTERY SIZE AA CIEC 0 SIGl IAli R 61 4PCS 6V I n UI OI I UI 0 ...

Page 29: ... FAST FORWARD CNJ i R wi WHEN THE 0 INCLUDING S3l __ R Ec 0__ ____ RECORD OR REWIND 6V BUTTON IS PUSHED BAN BLK ORY BATTERY SIZE AA UEC DESIGNATION RGI t 4PCS 6V RECHARGEABLE BATTERY BP 28 BATTERY CASE TOTAL CURRENT PLAYBACK 1 00mA RECOR0 115mA S5 REWIND 125mA IREC FAST FORWAR0 1 0mA SPEECH BRN MUSIC GRY S2 POWER TOTAL CURRENT _ _ __ J REC SATT METER BLK e WIH Gfl C31 001 Color code of sleeving ov...

Page 30: ...8 BT 50 TC 150 B BT 50 C 32 ll 0 001 GRYI iGRYl GR WH R 0 C31 MO OOI PLAYBACK g I NPUT _UG 5 IC2 8 2 ICI 4 7 WHT 0 001 RED VIO VIO 1 1 0 221F IIN CLUOING FG COILl I TIN NED CO PPER W IRE J3 R ED IREMOTEI SRN _ ___ BRN 3 2 4 JI 1 ...

Page 31: ...t 0 03V R2f 5 k r o 4V 5 5V 6V 1131 05 I gi I 1 C25 1 21t 06 I iH w 3 3 0V I I II I e C22 _ I 11 1 IS 5Vl R29 0 033 I 11 S 7 2 71t 10 31 1 R37 IXN 04 so I I y VI l I r I 0 3 J J R2 68k R24 2 711 L C24 4 I i V ME 54 l llJ 2 REC 8ATTI r MD1C AU c apec itors are in 1 1F unlessotherwise noted 50 or les tin t volts _ omitted except for electrolytic ty p u aF Alt rftistors are irr n 1 26 W unless otherw...

Page 32: ...0 775V l0d9l00 10k n LOAD R 38 56 I SW SI 80mA CJ4 0 068 I 0 001 I C31 ssrn m 4 JSIC i SPEECM 0 2211 J3 IREMOTEf C29 0 001 C32 I 0 001 7 0 ml R40 1 1 1 k TOTAL CURRENT PI AYBAOC IOOmA RECORD ll5mA REWIND 125mA FAST IIOmA ICZ 8X295 SERVO AMP IM l Q 2SCl474 MOTOR DRIVER R41 1 2k _ _ o CNJ o I D c 1N sv I l USE REcalO al REWIND BIJTTON IS PUSHED I J I I I I J ORY 8ATTER f SIZE AA RECHARGEA8l E BATTER...

Page 33: ...tr 7 C TC 150 B BT 50 D X 3545 526 0 Sil TC 150 8T SOI X 3 45 5 4 Block TC 150tl Ud A y ttw 1 nt lvd rt9 p t _ i5 o51 0r S I TC 150 BT 501 3 545 65 1 81 ck TC 15081 84Jlhi 9 4 Note X 3545 521 5 f ISH TC 150 BT SOI X 3545 527 J Bl k TC ISOB f MWI A s t y VOPlr r cJud 1t9 Mrtl l Ml1t l t J 54 U42 00 Esultl INOlt pl rmidt knob All screws are Phillips croa recess type uni otherwise noted 1 slotted hee...

Page 34: ...C Jl EECH 7 fTC 1 11 BT 601 11 m _ 3 _ 5 r _ _ I I _ a _ 8 C D Nau E f 1 607 4140 9 Jslt EA ff H ff JZJ I MT 491 QO ilt MIC JI 1 501 _ REMOTE Al Items with no pan number and or no description are not stocked because they are seldom required for routine s vica All screws a Phillips c JOSS rec ty uni otherwise noted_ slotted hNd Circled letters to 7 l are applicable to l uropeen models only OCT show...

Page 35: ... IJO T ____ 3101 01 11 pr f M ifl fllNlt r __ __ _ W pllSl f 2 mm dia It 025 L Y 2064 101 3 eou _ r X JSf H 0 Brl t Aq y r S ltlL ff I I TI 3 545 5 43 00 jj 1 r i t 00 Z IS 3489 J I0 XX s g1 1m 1 W I 3 52l 93 00 3 545 5 85 00 S ir I f S tr _ P 1 11 J u Knoh PB VOL I 222 699XX Rnm0 11 i JJ I I0kit PB VOL l1 43 Bratikut t11J1 1 11 J 1 J t IOSistor J Sfs 7 2500 v w nob PA USE le ___ Lfl 111r pause J ...

Page 36: ...I PAUSE S J 0 9 _ __ V n 3 B L t N Pl4Jw Br ht lt f switth 3 509 121 0 0 s Lod Pt w Aa r lunc1 on butrOll Pull J IIJpply I SitHtld 8 moto 7 I Moro oi21F Ml W i J 52 139 00 Ill _ ___ r _ Cush Ori motor 3 521 lfNJO lj v P llr moto J N ote I terns with no part number and or no descriptio n are not stock ed because they are seldom required tor routine service All screws are Phillips cross recess type ...

Page 37: ... wloHI 181 i _ I J 54 i 11 i C I w __ l l IJc 2mm di I I i I 3 701 43 6 01 plo 1 c 1 6mm di J 541 1 U OI 1 0 25 w pu IJc 1 6mm d _ J 507 115 00 Ill _ _ 3 701 43 6 11 V El 2 W p lull l 6 mmdl I 0 251 X 3545 5 14 0 i Vl y A y _Ind P2 3 E 1f h 1w n A r 11tu 011 includin p rts m111t ld I o l r 5 I r 5 5 3 0 i AJsy r wind 3 701 43 6 II f6 du C I y forwMd L I X 3545 5 15 0 C ul _y AM y hst forN d E 1 2 ...

Page 38: ...dr i l93 00 E t 6 I I__ lf n o o I _ Lt1vlr 81 evlt w 1 2x2 _ T 3 545 59800 II M Spfing BJ unction buu on r ut J 545 591 JO Spring AJ function bu110 1 Note Items with no part number and or no descr iption are not stock ed because they are stldom required for routine service All screws are Phillips cross recess type unless otherwise noted 1 c slotted head Circled letters to l I are applicable to Eu...

Page 39: ... 1 a W regular type carbon resistors arc omitted Check schematic diagram for resistance values 1 131 169 11 0 47 k 1000 Cl l0V C2 l 131 202 11 1 S 20V C3 1 131 173 1l 33 l0V Rl 2 1 209 878 11 1 8 k C4 l l0S 669 12 0 0047 mylar R3 1 209 781 ll l0k C5 1 161 190 ll 0 001 ceramic R8 1 210 381 11 33 k boundary layer Rl 2 1 209 768 11 2 2k Rl3 1 210 113 11 18 k C6 1 10S 669 12 0 0047 mylar C1 l 131 176 ...

Page 40: ... 346 00 Leaf BATT CHECK 1 514 797 00 Slide MUSIC SPEECH Note Circled letters to Z are applicable to European models only Ref No Part No Description CNJ Jl 12 J3 EH L1 M ME MIC RPH SP Tl 14 JACKS 1 507 447 XX connector DC IN 6 V 1 507 491 00 MIC 1 507 491 00 EARPHONE 1 507 195 00 REMOTE MISCELLANEOUS 8 825 566 00 Head erase EBF5 02B 1 407 847 00 Coil microinductor 35 µH 8 834 221 01 b Motor D 221F ...

Page 41: ...I I I I Earphone ME 21 0 I 0 I 0 I 0 I 0 0 0 I Plug shorting SP I00 I I I I I I 0 I I I I I I I Battery long life size A 4 PCS I 0 I 0 I 0 I I I I I I Cord connection RK 64H 0 I 0 I 0 I 0 I 0 0 I I I I Cushion I I 0 I 0 I 0 0 0 I Cushion I I I I 0 I I I I I I I I O Case carrying 0 I 0 I 0 0 0 0 I 0 I I I I I I I Carton I I 0 0 0 0 I I I I Carton I I I I 0 I I I I I I Carton I I I 0 I I I I I I I S...

Page 42: ...www SteamPoweredRadio Com 9 954 394 81 Sony Corporation 1976 16 81EOE Printed i ...

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