Radio Shack TRS-80 26-3501 Service Manual Download Page 22 | Manualshive

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Summary of Contents for TRS-80 26-3501

Page 1: ...ervlce TRSa Pocket Comput9f and Cassette Interface C8t111og Number 2 3501 26 3503 CUSTOM MAMfACTIJlEO FOR RAIJIO SHACK2A DIVISION OF TANDY CORPORATION...

Page 2: ...O 5CaIP T1 lI iS 10 IER E SllVlONC 14 S CASSUTE TAft A tr UfACl 14 4 CASUTTIOf f llAno If 1 CtECJI I ROCilUM OK nT D1ACllAM TS A SK20IAU P l5Ill lIIl ZI 0 n 0 0 t c L 24 Eq _ u LrP c I _ _ 21 l lJOJ...

Page 3: ..._ _ _ li 1_ 80_ 00 _ _IWf 16_1lol o IS V I n 1bnIIt s _ loWf 1 OR I ur _ buff Arithmetic functions All _ _ ply Pno j 1 1 1 _ 1 _ SI CO lA 10_00 10 _ AS 1 A l_ A1 _ l lG _ _ htaJ Ui unl d li jl po i U...

Page 4: ...ource 1 1 Y lof ro _ _ _01 r_ olRU _1 1 00 OJ U Abo _ Miscellaneous h_ 1I r y _t _I 1 t f1 oI I Iw _ _ y rr orr l6 JSCll _ a l1O ifIlorf_l 115 1 1 10 0 44 HI _ 16 1 W 1 7 0 1 1tH w 17OI O 1J _ 6 l l l...

Page 5: ...F I Eo I F ffl H L I10 I nJ r 1 r N...

Page 6: ...L oulrol of nih rio_ of i1k 1d I d it do_t Of 101 1 tho of ASIC II tion 10 doddin _1 1 io to b _ ed Ie Dd papal Ih ioof 1cm to Ito d lfIl y l ut CI lI I dOOl no f ny Xt 1Itioll by i f It o Iy ho 6 1 U...

Page 7: ...verview 01 RAM Ihr C OS RA II J h po b och p4 MAio I po d ill II dl pl cIllF uM In l o l n Comput lc ibt l M1 lIl poraX M lI A I I All RAIIl _y _ by m doll hoi uuo I Kw IMO l AlII Of xt t I d IeO X l...

Page 8: ...1_ 10 1 D1SPLl Y nul J d l Y II __ kqtI oIIoflo1 oa NIT J do ltooC Ilmaf o d I utfn r aI _ o ol_ _ F I Th tolai _ o f h uwdo JI I roud _ A Yll1_ j r _ 1 of OlIp I 4 _ _01_ 0 au _ Ioyt lln rDo plo on 1...

Page 9: ...ddpl l hoff 10 Il IJlIpll loop II OOQ n H 00 0 HlO O O Ho 00 0 HI II HIOOO O HT 000 0 SIS lS SI ml lilt mil lIIU Nt H III I 1 1 U I I _ _ _ t 1 L 1 J 1I II t 1111 AI A n __ Io ot loy CPlJ II n ot LIoo...

Page 10: ......

Page 11: ...11tJ f u r r r J i r t t gl i r8Hr E1 l l i r Hlidlih Ill HUl in Us I i i h sirl i u tl j t 1 IIr Ii i 11 f i JI 1ijl l Ii 1 7 fg I n l 1 s f i r Ii l l I il iii I I 6 I t h I I l I 2 II _al I t i n...

Page 12: ...11 h pIIt 1 1 011 hilh bu 1 h n he All II S i _d IlAM Dot 11 0 1 11 ian ol During d pol y HI _ _ I r k y n ay t Io _ In o ll Ilu fo d of h po buff 00 f buff RAM nd 1 101 1 00 1ll f bY Chip I 1010 Our...

Page 13: ...b _ vif 111011 _oll 1 U I Do _ploy t I oy 1 SC43178 CPU II 10 100 If L _lin t II n u lIlo wpoIlDlo l o Iio J vpalJ hop 1Ik upo lDolJlloY IlOl I OlIph_ IDIo 1 I 11 0 0 T _ JIqII 00 F 1ioq d oI _ v_ Voc...

Page 14: ...lI futjI 111 IIA _ Duo oJ TwM ly hlsl Bl OI oIa1 i Grne _ 1 1 1 JUl J lltopI y Door clOPoY t 0 1 1 0 c 1 of bo _1 lCIl ciopl l1iJ of the G ll Soopp y IV 1 1 0 cu 1 b kpl 09 ll D pIo _ LCD _ It _ IipoI...

Page 15: ...R 1 F FRVF R RlI I S mo fo m tho rmo 1 1 CPU I B y 1i 1 Hi d n 0 in Ct l II SIN Ki1 E ion il 1 To bo 0 1 ro SI1 U n KiJ T ij y siill l lou I p i opm d 10 14 Pol 0 i hfyInl 1 1 1 0 h l pll no oono o L...

Page 16: ...ol 91CftW1 O _wold r e _ _ _ 10 0 _ N01el on itablt _ 1 14 Sh k nuo ho n Il _ 0 eto OIJ _ 01 pfi l e VI 0 1 to _ 2 llie I jock PUO mptd flCe 011 1 11 itll fill I Y l of Ieo J V J f put hi p 1rn1 4 of...

Page 17: ...ION Recording H _ 11 001 TII T I Ow t _ l r C OOrJ IqII __ do y 1 1 lI poof l _ _ J l of llno M of II _ oj _ fill _p d 1 11 Ill _ _ _ eo Pof 40 _ boIfJn _ I _ 1 01_ _ia _ 40101 _ a _ r lM _1 _ 0 ft_ 1...

Page 18: ...oM F l 01 1U1 _ 11ft btl be r_ SU 1Ilth u _ miblt d U per I wllo lI _ II dod _o ll 1JiI COI d I n pI000I 0 MJ jo t 01 0 _ _ _ _ afAOI Of lool_ lO _ Reproduction OUr L II JId M _ I0 Il Sd If l bo ftJ...

Page 19: ...A w_m II oc_ 0 0 ow 0 0 0 i 0 0 0 0 L ______ I rr_ no TC s r _ 11 pofonn _ uod fftOt t t_ _ P dIop _ _ M _ _ _ Jnt f N cf I __ __ _ _ JI R oI put Tho frioy 0 orr _ _ b _ M x b _ _ Mr _ _ F s l u __ 00...

Page 20: ...I j SHnJ 11 01 P 12 01 RhSERVE TUll 7 I IIJ o T I otl RI RVE SHI rl k n l ISH T I sHnl A 3 I 201 ilESliltV E fJ olElIl I I T 0 Gtllt1SElt E ISHI r111 I IIf SEIIV E Al 04 Al O IUHU 1 04 IMONI IMODEl R...

Page 21: ...L In 1oo K oed if 1llI d folio roII jtlOM I I If to ron Sap 6 2 If f ill o ron 0 J o I Or SI p 8 J If doe M op Sl p 9 4 If no 1Id rd S p lJ R p t n Jo Of Ii i co I h n is dKpby J S1 p 1 I p 0l Ml11 f...

Page 22: ...t lm o or lilll I I 0 0 0 0 0 M k b be I don nor un es Isul T es 0 0 0 0 0 tIN1H 1 1 n n n n n Tho I u n 1M ordirll II d 0 0 0 0 0 lb od ill oJ ill P ploy J 0 0 It nd I til I I n r 1 J _ eo 0 0 0 0 e...

Page 23: ...5 1 If Ill liOlIlIlilll w Silf 10 r Jtc fKOOdoN tIl _If _ _II p1 If_ _ dibl 0 1 do 1lIo _ ho f If_ oud w Ilo ho t dI _oot I ho Io f _ Ne _ ILVfERJ RUS _odll_ RUN t _ 10 d o l foo 1 RUN Il L _1 _ 0 _...

Page 24: ...CHECK PROGRAM 1 4I l R E II D II 1111 WID IALL RI j1 VI IE Tt K1 III lOEI l Hn IilljJ t ul l ISHITI s j J ItNTht t It Nn l 1 1 D InTHI I I i j HI l ooEI l 00 ffi ill ENTER ItfifF lI iTERI UN u t I I I...

Page 25: ...ute II ft 0 I fl _ It uo 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 C 0 C 0 0 0 0 0 0 0 0 a 0 0 0 0...

Page 26: ...8 CIRCUIT DIAGRAM PARTS Circuit Diagram I I h i H _ 0 i f f yy t X I...

Page 27: ...SIGNALS POSITION p l it L T _ HH J rflJ if IJ IIIr _ _ I i r c D J j m1 h...

Page 28: ...Operation p e B J I _ 4 _ _ _ TOP VI ill _ r r f I IITf itftl _ R A J Iow ll j I _ 1...

Page 29: ...J _1 I 1 1 Key Circuit...

Page 30: ...4C _ I E I Jr f...

Page 31: ...Key P C B w _ M_ WW rOlololl _ _ M _ _ G B 0 0 0 0 E3 I 0 0 0 0 EJ EJ EJ I f l EJ l l 0 8 G G G 0 G 0 G I 0 G J G 0 EJ B EJ EJ EJ 0 _ m i tc a 1 4 5i jji liliII I IE tiriJi 1...

Page 32: ...Interface Circuit Diagram Interface P C B _ __ _...

Page 33: ...11lM TZZ oro At u YVLLfllllUE 1 T_ lCO HH10J3CCZZ LCD ART 2_ l ANGK 29OCC ZZ fll to LCD 0 00130 FIL 2JOCCZZ ART 2lJ81 HOECA 5UCCZZ n _ _ ART 19 Itw r i n liT I1Illll GU UI126otCCZI N lI C ItC Koy 11 L...

Page 34: ...c _ VCICV U n nO 5lN 0 o DS15lkl OX _ V ODS1YIU 1 I Tht_ ll_l T 21 HHI54KP SII ll _ TCO AIUl 3 JJZ V SC 31Z LSI to H 3CQ n m 4 11 1 u 1Cl l A l lt JW I VII C 21711 I II 101011U11 K409 VH le401IU I x_...

Page 35: ..._ IlCC72 IC VCKy nllc nt1 f 11 o OS Slkl AOK 1405 f DOS1 4111 I n _I HZt VHH SCKD_ I LSllo TCAJ J 3032 IC 1121 1 L teN II SC Jl n H SeA 1 7I 1 u 1Cl U Zl I 00 1 11 4 CO II IC Te oll 39 VH TCCO U IC I...

Page 36: ...TI C SZ11l l Cl1 o l lIN o8QI_2OI o er 1M H I X 278O lie 115 1O CCZZ C P IT__ ace 100IC ICf lie V U 1 810 1 1OOI F oOV II O li e e ACC10JMFTM veTVlOU I X103M lCilXQlf l iV l lmo e lT_ ACCl0S2CTP IlC Z...

Page 37: ...35 1 V lEW rXPI OOE r r Qi l _...

Page 38: ...1775CCU 0 ___ 2983 HOle l1111CClZ GCAIS2 JllOC CZZ c Il YClAAUICW OI Q I V _ lO l e l_l AC 17l JlolP VCOTKU1H 71K c n VCOYICUll1 K e 1oCC1ll3 fTl vtrfPU EX10 101 e CT_I ACClllo1WlTP VCfTPU1NK1OIM o l...

Page 39: ...1 UtocnPl_ l Dat on I oor N_ C_ AJolO 29E88 VRD ST2BY5 J 118W MOO I ll e t ooI ANOOlIIHB YRO ST2EYJJOJ 1I4W 3 1 lilIo 1 _ 7SAID VS2SAl33 10 1 _ 1 OI51lltS YS2SCHI S...

Page 40: ...VIEW 2 EXPLODED IO I o 13 11 ____14 I...

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