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Tandy RadioShack PRO-94, Service Manual, Page: 1 / 53

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Tandy RadioShack PRO-94 Service Manual Download Page 1

Summary of Contents for RadioShack PRO-94

Page 1: ...u m enl _ _ _ _ _ _ _ _ _ _ 7 Tmubleshooting _ _ _ 0 _ _ _ _ _ 12 Vliril 19 OtlJgram _ w 15 Pnnted Circuit Boards _ _ _ 16 ElplodecJ View and Ols assembry tnstruetlons w _ __ 20 MectlallicaJ Parts Lis...

Page 2: ...h Operatinp ternperaiure Stara oB temperature Di mensione HW D Wllight Aecesscnes Heternd e system 1000 channets 50 eH x 20 bank5 20 enennets Ie eearcn sk lp memory 20 cnanr ets ter service scan 31 1p...

Page 3: ...CONDITIONS GV o e at bertery tennlnal M oIlm 25 c S c 1 kHz NFM J kHz devJAM 60 modo 100 JlV chm resis ve lood 5 rnW 0 32 V Power SOOrt Anlenna impedance Test tercerature Modulation freque ncy Dvviati...

Page 4: ...10 o n Ol sq 1 h MAIlUALl S N N VHf la band at 40 640 MHz cIl 25 15 VHF high band qt 162 dQOMHz en 25 15 220 MHL tarn 3121 6 005 MH2 cIl 25 15 UHF band er 4532 50 MHL oB 25 15 A1rcraft band a 127 1 7...

Page 5: ...CH sec 50 25 Seartfl 162 4 153 4 L1H MANUAL mode Stec sec 100 50 e errent drain at 162 40 MHzl al luIl output mA De 30 220 3f Squ9ICM 1 mAOC 70 100 BaU LOl tJrn on voltag e V 410 50 4 35 4 65 Auto pow...

Page 6: ...R w u n 0 u U t u i OI J _ il 9 j I 6 c L J I L f iOf o s BLoeK DIAGRAM L l l fL i...

Page 7: ...unter INAD meter Digilal voltmet r SSVM Signal generator SG laM 1 Test FrtqlJe ncy 7 ehaont l T t Frsquen y Cl lannol Tem Frequency Channel Tnt Frequency 1 30 05 lO MHz 9 511 9125 MHz 17 857 2000 MHz...

Page 8: ...NOo j oe P 1rfQr SvO O ly LNOO C I D ____ j J u J j v r JlIQO J2 AlIgnmenl Procedure Slop 1 P lo CH14 AdJuotmen1 CT Re SIutt oroect lhelrequency counter 10 LNOO See Pag 17 lor the positiQ n Adjust Cl1...

Page 9: ...S l NT 0 v De Pcser 5u lply I 7 1 7 1 r 0 Tu F1c I SG AlIgnmenl Procedure Slep Pref 1J1 to Adiu bIIEW I1 Re ult e H2 1 SG 40 84 MHz L12 Conneet the figitaJ voltmeter te LND6 Sec Paqe 17 tor No mO jui...

Page 10: ...nt Procedure Digilal Vo1m ter I _ I Step 1 P fiet ta eH2 SG 40 840 r lHz NFM No mo tulatton Squelch CW Adlustnllent RT1 nef uU Set 1he SG vd 50 Ihat 1h9 voltaq e at LN07 i 0 00 1 0 05 V De Soo Pag o 1...

Page 11: ...Il 1 l um crllhE Power whi e pressing 2 9 and PAIORITY kflY S l hM prass MANUAl key 00 162 4 MHz COl lnect the trequencv ccenter10 L1 109 See Page 17 lor 2 100 V RT4 fhe pO l tiOn Adjust RT4 to obla f...

Page 12: ...Reception Check TROUBLESHOOTING Power ON j NO I I YES etectve ICZD1 1C202 nr for asKl aled circuit YES D lachoa ICG end r eeeecratea CirtlJit 12...

Page 13: ...e t ey ccotacr YES IC201 1 5 OK NO Og ediv IC206 YES HoMo While jo lng rr e bOY acm e tilEr rncr cc cceeecr mioTrt bek up ti SO lIrTl tM l awit OFF flna then ON n t te li 1rt 1 1 flQ k 1 1 NO Dolrx tl...

Page 14: ...boo j utl nl cireune oi tno t ur il Gtlntrol circuil t NO Tabl 2 Unit V YES RF F eq M il Pin 11 Pia Pn 15 P n t 11 hl1a CBfK liwa ras 2J tJHz 0 SI 1 s r lOS 1J1 _til 0 4i 0 1 7 17 P A U 0 6 216 225 ti...

Page 15: ...u y I N Z H w z u s x 0 W o f 0 1 1 5 WIRING DIAGRAM er OHH 10 11 U 13SNI N 0 z N L N 0 o 0 Bli a n x e 0 r N 0 0 i u N 0 N W Z N H 0 N 0 0 H Z 0 u 0 N W 0 z 0 e W N 8 oqo u 0 co I I H u 0 H H z e 0...

Page 16: ...RF PRINTED CIRCUIT BOARDS Top View 1 6...

Page 17: ...I LND9 LND3 Bottom View 17 EPOXY RESIN...

Page 18: ...LOGIC er lJJ L I I n IS ru co Top View 18...

Page 19: ...DJ ro SJ u r I ro ro Ul Tl D BottomView 19...

Page 20: ...S Ta remove the front case and rear case remove tour screws trom the rear ot the unit Ta remove the top case pull out the two knobs and Ihe spanner nut from the top case Then pull oft Ihe top case 4 A...

Page 21: ...JNUT428506Z 20 5pnngTerminal SUSJ04 WPB NSPZ43191 5Z 21 Spnng Terminal SWIC f NSPZ4J1856Z 22 NOl usec 23 Shleld Ptate SPTE HSDC442904Z 2 Holder 6utton SE CC T 0 6 M FZN 3 HHDZ431863Z 2 Cuwlon Mollpren...

Page 22: ...CM1811 005Z C18 Ceram C 0 001 pF 50 V 10 B BCMian 025Z C17 Ceramc 470pF SOV 15 CH BCMMal A714Z C18 Ce riuric 0 0039 IJ F 50 V 10 D B 8CML61 392SZ C19 Ceramic 680 pF 25V 15 CH BCMM 1Gal4Z C20 CArarnc 0...

Page 23: ...25Z CG Caramie 5 pF 50V O 25 pF CH BCMM815091Z C65 CB7 Not Ussd C68 Cerarnic 0 00 1 u F 50V 10 8 BCM LB 11 005Z CG9 Caramlc a 0 01 1 1F 50 V H 0 0 B BCM Lel1 025Z G70 Ceramic 12 pF 50V i5 RH BCM N8112...

Page 24: ...CH BC M M811014Z C115 Oeramlc 0 001 JlF 50V 10 B BC MLB1 10 2 2 C116 Oerarme 0 75 p F 50V tO l pF eH BCMS817588Z C11l Ceramic 2 oF sov 4 025 pF RK BCMHa 120912 C118 Oeramlc 2 oF SOV M 2SpF RK BCMH81...

Page 25: ...6 Ceramic 0 01 IlF 50 V 10 a B BCML811035Z Ct67 Ceramic lS pF so V CH BCMMll 115042 Ct68 CQ ramJ c 15 pF 50V 5 CH BCMM81 1504Z CI69 TRrltalum Chip 1 F rs v 20 C 122 T APE BCSH31109SZ or 1 IF 16 V 0 AC...

Page 26: ...OOAV I041001 01 OA 1041 1SS390 TEBI BDAY1041001 015 01l 1041 188390 TEa BOAY104100 018 DA 041 IS8390 rsst BOAYl041001 017 DSMI OC TR I BDAY05ss001 01a A l041 l SS3QO TE61 BDAV1041001 I 019 DA 1D41 15...

Page 27: ...u H BLZYD1 S8567 l7 roouctcr Mol toed Chip LZ 1BB EURE 2NJF2 0 01 2 uH Bl2YOl88127 La Inductor Moloed Chip LZ1 86 ELJRE1 N5DF2 0 0015 uH BLZYOISB 19 Inductor M Olde d Chip LZ BB ELJRE27NJF2 0 027 pH B...

Page 28: ...C1623 l1l TlB BDeC 1523648 or DB 361 2SC211 2 TEB5L BD6C2712124 0 10 08 7 1 2SC33 3 R24 T IB BD6C l56646 0 1 OB 7 11 2SC3 l56 A24 T B BD6 33566 6 0 12 O 7 1 1 2SC33 R2 T I B 60B 56646 01 3 06 711 2SC3...

Page 29: ...W 5 C Ctr bOnFI ooChip 220kohm 1 1 6 W 15 C bonFi Chip 47 kOhm W 6 W 5 Carbon FlM1d Chip 10 krom 1 16 W 15 eerren R o ed C hip 47 kohm 1I16 f1 5 e ereen F d Chip 580 kohm 1 16 W 15 Carbon Fixed Chip 4...

Page 30: ......

Page 31: ...166844Z R130 Carbon Pixad Chip 220 kohm 1 1 6 W 5 BRFC 162 244Z R131 Ocrbon Flxed Chip 2 2 Mobm 1 16 W 15 BAFC 162254Z R132 C r Irboo FiJCed Chip 6 13 kohrn 1 1 6 W S BRFC16EH324Z R13a Oarbon Flxod Ch...

Page 32: ...BRFC162234Z A176 Carbon f ixEKi Chop 22 kohm l i16 WiS BRFCI62234Z Aln Carbon Fiaed Cbp 220 kohm l il eW 5 BRFCl62244Z R178 Co IIrban Fixed eh P 10 kohm f16W 16 BA C161004Z R17g Car1ron Fixed e hip 1...

Page 33: ...0 01 j LF 50 V tIO B BCMLB1I035Z 0210 Ceramlc 22pF 50 V 15 e H OCMW812204Z 0211 c eremc 22 pF OV t 5 CH BCMW81 22Q4Z 0212 Oeramjc 22 pF 50 V 15 eH OCIAW8I 2204Z 0213 Oeramc 0 033 F 16V 110 B I3CM LJ...

Page 34: ...10 kotlm 1116W 5 BRFC161004Z R2n Not ueeo R218 carbon Fi ed Ctllp 10 kdlm 1l16W S BAFC1 61034Z R2U Not US d R220 carbon fi d Chip 100 kOhm 1116W 5 BRFC1 61044Z R221 Gal bot l Fh etj Chip 100 kohm 1 16...

Page 35: ...V 16 W 5 BRFCl54734Z R25 Ca rtIr m I i u d Chip 47 kobm 1 16 W l 5 S 1 I C1647 342 R255 Carbon Fbed Chip kohm V 16 W 5 BRFC1 610 24Z R257 Oernon I i u d Chip 10 kohm 1 16 W L5 BR Fe 161034Z R258 e ert...

Page 36: ...Go C OJIIot t E F I r e C f c c r A 3ll lSS184 258111 5 E f1 ese c C IL llJ r E mnter SEMICONDUCTOR LEAD IDENTIFICATION B CL 200Y 2SA812 2SC1 3 2SC3121 2SC3356 R24 MMBTS428LTt 2SCSOOS TRANSISTORS DIO...

Page 37: ...IC1 pce 1 1 2T rC3 TDA7233D IC2 MC3361COR2 r VUGA CR IZ llEA oM j fA lfiP s c V COtHl IDL I PAIlCER lI TFR 0 0 urrs rr j1 0 DCC JI1JNG b l U i ac I i 1Jr I ml8 A lJ 8 WI LCH I 5 OC U TO R INFUT INP IT...

Page 38: ...11 C GNO 0 N BYP o l O OIT 3 l r v I F eed z OF IC e ioe MB1 5U3aPF I ItI r _ to l GtlOO M 1 1 n I o LAU O O A IC TK11238 ll CL 1 04 L A lOOOA...

Page 39: ...39 _ v r ol J 1 1 I i T J I f l oOUlO UT T Ir J 1 _ 1 1n tl JT1 ij Ol T M Jr 1Q T2l __ fH2 5 con l I IG7 T1 1180l1M J7 _ 1 I ICB lC9 NJM3403AV r 0 AWTP J Nr l r A IIPLlI IC11 8U406fiBCFV...

Page 40: ...0 c c eur Ft rFnCR 1i p m l cl I 1 TI H p J IG17 LMC50TOVIx 1 11 _ r r i t M W n TER r 40 IC12 5 a90 5 n u JII I n LoQ UO x s I yA Q J lUI TloJU o C oA I 1 n lOC Flx HCt D A r A n eLOC A I r 1 1 11 l...

Page 41: ...lX1 _ J I O _I J ____ lt ___ Oo wAU l ll _ ___ _ u o w 1 IW _ lN 1 y j 0 r 0 1 0 0 42 l L r t l EF l a re 1 Ir 1 r l l UL Tt I o C 1 p u sr e lI C l 8 t TI J 0 M fI Wl J f D_ u O 0 h _ u v l O O lIl8...

Page 42: ...tJ P 3 2 n C 1F tE T Di l n I 1 B i Ii li 1i 1 I IC20G TK1 1231BMCL...

Page 43: ...E o 162 MHZ 100 V C O S 0 E o c SINE WA VE c TRANSI5TO RS Unit IV _lUI Vof llee No B 0 3 I 162 4 Hl l00 V 0 E 1 4 1 4 RI NIOfF c 1 0 So TIOHT a D E 11 12 4 MH 100 V C a e e 0 7 03 E ca 1624 1 t1 z rc...

Page 44: ...Hl l00 u V 3 5 0 6 6 1 3 S 2 3 5 3 n 0 s Ne IC 1 a 1 a 1 3 10 11 12 c 3 0 Unit IVl OT P No 14 0 15 2 5 I 25 IC 11 0 1 1 3 5 eo 3 5 1 a 3 9 2 2 lC1 t62 4 W z 100 1 V S 115 U 6 1 H 5 e a 1 1 5 1 6 z 1 5...

Page 45: ...24 Ne 25 Ne ce 0 0 27 0 0 ze N e o 0 se u0 3 0 0 32 0 0 sa Ne Ne NO J6 Ne 7 Ne J C l l aa o NC 11 45 IC S Unit rvi Plo Vol 9 0 I a 0 0 162 4 IAHl 100 V a 0 1 3 SNE 2 6 NE 3 ae GNO 5 a a D GND a ND 1 I...

Page 46: ...WtE A IE W a SQlJo AE E t sa AEWA JE I SO AEW E t SOIJol n WAIIE G ra SOUARE WAVE es at ta 1 CLOCI ICOO 6 14 3 7 1 15 1 CLOCK 1 1 Ne a t 17 a t 70 0 1 U 71 Ne IC20i 19 0 72 Ne 20 0 7J Ne at Ne 22 SQU...

Page 47: ...o A IE 4 SOUAStE WA IE 42 43 SOUA RE WAV 4 SQUARE WAVE 46 SOOAHE WAVE 46 SOUAnE WAVr 47 S QUARE VIAVE SQlJARf IAV l so SOUARE AVE OOU RE J IA o E se QUAAf WAVE sa SQUARE W VE sell u REWAVE SQUARE WAVE...

Page 48: ...NOTE 41...

Page 49: ...I H 2 S 2 I u Q r 1 h P c a 2St S D 5 Y Ol U r 4 _ u ji 2 S C i 23 L O T _ 1 I J I I 1 u oo 25tJ JS R2 4 eO I 1 1 1 l eo U I t 9 1 7 r x r cr r f l u Ol Ol u ol u oo h r 0 o 1 r u I r I Cil J 3 4 e3...

Page 50: ...ocn n 1 1 l 1 _ S __11 o n i _ I I ALL t _ Tl IU 1 5 OO I lU1S _ _ 00 IJ _ _ _ I ISS _ lW I S _ IS 1 nt 0 u I 11 c s T K 1 1 2 1 1 1 c r T KI I ol 0 I I T 50 J I o r ol Ol r J I a r 2 A 8 12I W _ L MD...

Page 51: ...r Ol a o 0 0 o o U u U 1 U _ot o 0 on o o U o 0 n i m I C 2 11 1 l 3 11 6 24 f GL Il P o L Lt Ol n MO T n O l OTSI U u u u U u c Lu u u 0 1 Ol Ol u Ol Ol H W tg o _ 0 t 10 o Ol p U Ol Q 201 2SC IG 3 l...

Page 52: ......

Page 53: ...I 08A99 RadIoShaek A DM lon of TDncly CorporatIon Fort Worth Tens 76102 Prin t In JapS I1I...

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