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Hitachi MB-6890 Service Manual
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Hitachi MB-6890 Service Manual

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HITACHI
PERSONAL
COMPUTER
MB'6890
SERVICE
MANUAL
I
R
0.3012
98

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Summary of Contents for Hitachi MB-6890

  • Page 1 All manuals and user guides at all-guides.com HITACHI PERSONAL COMPUTER MB’6890 SERVICE MANUAL 0.3012...
  • Page 2 All manuals and user guides at all-guides.com COMPUTER HITACHI PERSONAL MANUAL MB-6890 SERVICE 30.1.2.1...
  • Page 3 All manuals and user guides at all-guides.com Index » General Features Specification ..each block name used I.C’s » Function » ..circuit Explanation Memory ..¢iii@;i== Adjustment ..Service points ....inbuilt switches usage Trouble shootings ....102 check method Operation circuit Basic...
  • Page 4 All manuals and user guides at all-guides.com General level having high BASIC multi personal computer, MB-6890 purpose programming. language achieved h i g h d ‹ m ‹ H d from requirement users expansion interfaces future system. built Features char...
  • Page 5 All manuals and user guides at all-guides.com signal. Connector 3-2_ Recorder(CASSETTEL Cassette Tape direction direction Signal Signal (CPU out) (CPU remote +--~ * - ’ * remote * - - * record |Play * - ‘ Light Penn./PEN) direction direction Signal Signal Out)
  • Page 6 All manuals and user guides at all-guides.com PRINTER INTERFACE(PRINTER) directien Qpin direction Signal filo. S3151 (CPU out) (CPU out) STRB --» ~_-~ ’_ ---» -_» --» ’ A i ; T < BUSY --» »-_- Memory expansion (RAM3, RAM4 p i 1 1 Q direction directicn RAM4...
  • Page 7 All manuals and user guides at all-guides.com Ihterface (I/F-I I/F-6) expansion ipinppin direction direction Signal Signal (CPU -out) (cPU- out) -4-_~ ---» -~-» --» ---» ’ »--» --» ‘ ---- ---A ---» --» --» 4--» ---- --» --» --» ’ ‘...
  • Page 8 All manuals and user guides at all-guides.com Explanation each part Operation panel ~»,‘ ,.., ~"’"T ‘ _ - »-= " ’ f_ _’ V" operation panel ~ W " C 5 G 5 ? ? <@@fafi'H switches "fHfi@ inside cover) .,’i’;i;@;_:_ ’i keyboard...
  • Page 9 @ Interface. sion -1~»,$-513 (I/F Qlight (DPW) Light (BAP-3700) """i fiCblour monitor (coLoR> monitor colour (c14-2170> @MonochromeMonitor’ (ww) monitor Green (KIZZDSSP) ins-zazc. Rs~z32c Other which equipment interface. RS-232C isprinter (PMNTER) interface pairs expansion connectors ’ inside pairs MB-6890. connectors memory expansion...
  • Page 10 All manuals and user guides at all-guides.com IC’s use. circuit function Type Unit central Pf C@SSif19 HDeso9P/MCeao9L Hmssossp rcse CRTC L.Sl HD4ea21P LCSS HD4sssoP ICS4 ACIA 1Cs1 Icss 1Cs9 Icse, 1Cso,1Cs1 xcsz [css IC54’ IC65’ IC66 IC57 HM4716AP-1 ICss,1Cs9 Icvo IC71 IC12, IC73, IC14,...
  • Page 11 All manuals and user guides at all-guides.com circuit type function Icas, IC51, IC111 HD74LSl57P de-selector/rfzultiplexer ICI" HD74LSI58P Icus req! HD14LS1e4P IC42 __§g_ parallel ahlft shift sN14Ls1seP reg. "" 1ca91c11, IC81, xcsz HD74LSl74P rcse, ICIOS, XC109 type flip flop Icus _:ET "...
  • Page 12 All manuals and user guides at all-guides.com HD6809P/MC6809L Unit Micro Processing MTU: arrangement GND------~-----V" E51 HA|_r’-._--._ ..-. H," Non-Mukabln lnwrum ----- ------ xYAL_ _____ _____ G y m RMIUMI | \ ¢ " U 9 K ~"’ - ’-"~~ SXTAL _______ _____En Icwnd...
  • Page 13 All manuals and user guides at all-guides.com entire system.This used reset network simple that peripherals higher threshold voltage ensures before reset state Processor. *HALT running level this input will stop cause instruction remainhelted indefinitely present driven indicat- without loss When High data.
  • Page 14 All manuals and user guides at all-guides.com Maskable Interrupt (NMI) nonmaskable negative edge this input that interrupt requests Anon-maskeble generated. interrupt inhibited cannot sequence also priority than software higher E I R Q , I R Q program, interrupt. Fast-Interrupt Request(FIRQ) level this...
  • Page 15 All manuals and user guides at all-guides.com line enables data transfers state Data Bus. from input buffers data transferred line device High signal been selected. sets buffers transfer data bus. output present enable pulse address enabled when proper Reset(RES) active register bits line...
  • Page 16 All manuals and user guides at all-guides.com Peripheral "Read Register read Low. Data Output lines corresponding programmed outputs. Data A" operation when data peripheral will This data read properly voltage less than lines than volts logic greater output lines Loading such that volt...
  • Page 17 All manuals and user guides at all-guides.com Enable(E) Enable signal,E, high impedance compatible input that enables input/output data buffers clocks data from ACIA. Read/Write(R/W) line high impedance input that compatible used control direction data flow through ACIA’s input/output data interface, When High(MPU Read...
  • Page 18 All manuals and user guides at all-guides.com CC>ntrol Modem limited control permit functions that includes ACIA severa andDCD. included CTS,RTS functions modem. peripheral Clear Send(CTS) automatic control provides compatible input This impedance high link modem communications transmitting Empty(TDRE) Transmit Data Register inhibiting active...
  • Page 19 All manuals and user guides at all-guides.com NSYNC) Vertical Sync (RS) Select Register verti- level signal which provides active H i g h the address’ VSYNC used select signal (RS) Select Register device. display RS is synchronization When of the CRTC. and 18 control registers register...
  • Page 20 Chip Select active (EE) content outputted memory line data Basic Monitor written three pieces System Program (uPD2364C-331, pPD2363C-332) MB-6890. Address allocated Address shown table 5-2. decoder TABLE R OM Address A oo o /1PD2se4c-aao BFFF ,,PDz3e4c-331 c ooo n1=z=1= »~ --Q-QQ "UU...
  • Page 21 All manuals and user guides at all-guides.com ’igl?Q2332C»§328,§, Rom) (4,096 BYTE MASK CSZEEE v¢¢Ae EER E ! I B E EIEEU DZGNU D’ Address M _ A -~~- .Data m_g, ..f5T.CSz Chip Select ---~ Fig. uPD232C-328 Mask (Read only Memory) used character...
  • Page 22 All manuals and user guides at all-guides.com HDZQEQS (Quadfllpfe 2‘i|’1DUt Positive NAND Gates) WØsw " " ’ ’ l’_ nnuunn ’lilvugeavgns 5-10 Fig. input NAND Gate. consist pieces 5-10 drawing. pins connect omitted wiring VCC, earth line. line input Gate. consist pieces 5-11...
  • Page 23 Open CoHector Output) 5’ lF.’§l " ’F > 5-13 Fig. inverters. Each collector consist from pieces Inverter 5-13 open MB-6890 circuit-drawing.different resistor each required output used collector. mark Inverter open "\ ‘\\ Output Regulator Inverter /»" v"\ collector collector...
  • Page 24 All manuals and user guides at all-guides.com HD74l;S08F¥‘ (Quedrupfe 2-input Positive Gates) (svn ’»3| §¢; 5-15 Fig. consist 5-15 pieces gate. (Triple 3-input NAND Gates) W’ S-16 Fig. 5-16 consists pieces NAND gate. truth table shown S-17. fig. Input Output utput V A p B l C .LIL...
  • Page 25 All manuals and user guides at all-guides.com H’5?14¢$;l¥F§,. (Triple -input Positive Gates) V;/A ’ » gal II? ’I Is[’Ir Fig. 5-18 5-18 consist pieces input Gate. below Fiq- 5-19- truth table shown Input Output ____ lnput Output (Hex Schnutt-TjiggerInverters) ISI) ’l Fig.
  • Page 26 All manuals and user guides at all-guides.com REQUl@f Inverter circuit diagram, inverters MB689O shown opposite. Trigger Inverter Inverter Regular Schmitt Trigger Inverter -r--- (HD74LS|4P) 5-2| Input HDZ4ES3d§ Gate) NAND Positive (8-input ’il 5-22 NAND gate figure input when Ouput goes (A-G) Input Output...
  • Page 27 All manuals and user guides at all-guides.com Table "L" "H" possible X... rising edge, +... Previous state Previous state Qo...Q Q ..Q EB IEIEIEI EI III I I I condition maintainsprevious output changes, input Even IIIIII IEIIEI rise. does clock edge l1llIl IIIIEI-B...
  • Page 28 All manuals and user guides at all-guides.com ’ HD14IES93F!? digit Input A-Output counter. (4-mt Bkmry Counter) digit Input B-Output counter ’NTT made counter connecting output input EIIIIIIIIIIIIIIH INPUT vcr: 5-28 Table digit Truth Table counter Cgunt *Truth Table between relationship reset input ’...
  • Page 29 All manuals and user guides at all-guides.com ZSAEP I-lDZ4E.S\ 5-29 Buffer Gates Consists pieces three (Quadruple state gates with. Outputs() When control input Low, between Three-State space input becomes output buffer output 3’ " " V" becomes High Impedance "HZ" when control input...
  • Page 30 All manuals and user guides at all-guides.com 5’7 table Input Output Select Enable table relationship X--~"H" both "H" "L Acceptable t a . b l ‹ I 1 1 D l . 1 t Output Select Enablg Y,IY. IHJH HITTHIITIH lG,=Gu Acceptable both...
  • Page 31 All manuals and user guides at all-guides.com (Dual 4-Line I-Line Data Selectors/Multiplexers) Input Slrcbc Select (SV) Cgyjgput ’Id ll!! ;"| UI’ 5-33 consists pair Multi- plexers. » Sdeci device which Multiplexer similar Sfmbt Input Output function switch rotary which_take_s D-L-.. a n - I .--»-.U »...
  • Page 32 All manuals and user guides at all-guides.com HD74lLSl51FF (Quadruple 2-Line l-Line Data Selectors/MultiplexerS(Nonlnverted Outputs)) 5-34 data selector/multiplexer which select data from Input Input two, having pairs Output (SV) ,__ pl.1 package. Strobe select $ h & | common When outputs. strobe input "H"...
  • Page 33 All manuals and user guides at all-guides.com (4-Line I6-Line Decoder/Demulb with iplexer Open Collector Output) EEEE BIEIIIBH EI ABCD IS Z 5-36 line-16 line d9CgdEr_ Qutput Q O Q 1 5 collector. open " IIBBIIEIB EIHIEUB 5-35 (HD14IS9P) s-I2 ’rrunh Table IUPUt Output...
  • Page 34 All manuals and user guides at all-guides.com SNZ4Sl 63l\£ (Synchronous 4-bit Binary Counter (Synchronous C|ear)) Output (SV) with digit 6¥ E n o m 5-37 Synchronous counter pxeset Load function. U5 U5 Il U! ll _This counter §gg; ,G» with done Preset preset...
  • Page 35 All manuals and user guides at all-guides.com I-IDZ4ESI64F!¥ output parallel (8-bar Parallel-our Shift consists 5-39 Regster) register. shift internal gates input serial El2f§§§i_____ input either Therefore, included. ’ data data, processincx during "L" prohibited. input Synchronous input Clear shifted data pulse.
  • Page 36 All manuals and user guides at all-guides.com shift load register Synchronized parallel 5-41 SNUESIGBEE3 select states. Serial Input Parallel/Serial (8-bit serial (SI) output shift from input Serial Register) Shift’ Output parrallel order data from Shift serial (A-H) inputs (A-H). Having input (S/L) serial...
  • Page 37 All manuals and user guides at all-guides.com S-I4 HD74LS174P, Q output does exist. ‘c|¢¢k Clear X...Acceptable both +...Rising edge. §. Qo...Previous status H D I 4 E S H 5 F ! - Ed3e’T"ig3 ’ed 5-Ala (Quadruple D-tl/535 consists lines Flip Flop.
  • Page 38 All manuals and user guides at all-guides.com HD74§525ZE§ Data I-Line (Quadruple 2-Line Selectors/Multiplexers with three State outputs Selectors/Multiplexers Data consist Inputs from data (A,B) which decide status (with Noninverted Three-State each output select, output control which Outputs)) common When outputs. output control outputs...
  • Page 39 All manuals and user guides at all-guides.com HDZ4ES36Z’AE§ (Hex Drivers with Three- State Outputs) driver with tri-state outpi 5-48 consists piece combined pieces pieces each__and gates E’ then connected input when control (G1, G2). ’Q control input (G1, low, output space becomes buffer...
  • Page 40 All manuals and user guides at all-guides.com 5-51 consists Schmitt trigger inverters, (Quadrupre Line Receivers) control each receiver with line input.. control Contrql (5V) control reslstance connectlnq lnput lnput pln, m [Fl thresh-hold voltage changed. cPntrol2AcontrQ! 5 V ) ,» Jntrol 4‘...
  • Page 41 All manuals and user guides at all-guides.com STRUCTURE circuit MB-6890’s block diagram. structure figure Shown E16-l " ’T below. "_;’ explained 1" » Clock EXTAL 6809 nerator J -_.. f":""’;"_| ’ Trace _G?§¢ ’u Timing signal Counte- block |"""’_ Generate...
  • Page 42 All manuals and user guides at all-guides.com [one of page 40-44 missing]...
  • Page 43 Supplied monochrome display. Keyboard MB-6890 hardware method. This scan method done counting hori- zontal synchronize signal their equal frequency signal, then scanning decoder IC86...
  • Page 44 All manuals and user guides at all-guides.com Cassette SAVE Load Circuit circuit Cassette SAVE convert data signal from serial signals ACIA (Asynchronous Communications Interface This Adaptor). signal Shift converted (Frequency Keying) signals which signals dividing then generated signal, outputted signal SAVE Cassette Recorder.
  • Page 45 All manuals and user guides at all-guides.com (I)D|PSW &l Internal Register Structure ’Addres Register Data Circflit FuI1CtilO1T1 Name READ wam-: sFFcx >< BK=-x’,.i anmx |lC98 1 1 s ? i ‹ § t § v r { f \ 1 I \ C t sr-*Pcs f\1I\CtiO1l\fg;;...
  • Page 46 All manuals and user guides at all-guides.com 6 2. sN74Ls245N RAM3,RAM4’ Connector HDGBOQP/MCSSOQL - gufgf " " " " ’ " " " |f4~vPs: 74Ls367AP Connector AavAa»|F4~oF5; R0MJMM.W&AmLcRmet¢ ABQ-’A8\3>RAM +5V1cz4 z c2z+5V ddress BOMB -e> »- 2’ 1/F1~4/F6 ddres KSNMU ~A|5 Mousse.
  • Page 47 All manuals and user guides at all-guides.com Table c-neo-sen. function Register QØigiki?-Y Mode Meds I _i g Characteq t Uanormali &¥§§;? Black rite & Blue s’ Graphic everse Magenta 1 i0 Green Cyan Yellow White function Table &4 Register ’ Function Mode Mode...
  • Page 48 All manuals and user guides at all-guides.com decoder address circuit decode This circuit allocated address expansion connectors circuit diagram shown Figure 6-5. circuit shown Figure decoded standard incorporated address address upper (AB15-ABM) IC33. outputted Thesetare signal, level address $4000-$7FFF level signal, address $000-$3FFF.
  • Page 49 All manuals and user guides at all-guides.com ICIBB ]C2| g : § § ‹ § § , I c 1 ,>0, 141.s1a9P |1025 PJ-U .> > fcziv IC29 A813 ’cm ICZ9 » .IICZS ’IC26 » When 1c33 5FFoo~$r-’Far Level ’H’ Circuit Fig.
  • Page 50 All manuals and user guides at all-guides.com XC 33 " PAMI \ § J - s s r r r C 3 ’ Level ’I xc 33 ii-931 lfegel 3 ’ lC137 74LS139P A89~$EL _ / § A _ § ? ‹ f Connector Expansion WEEE...
  • Page 51 All manuals and user guides at all-guides.com Timing signal generator. 6-4-1 specification clock System according various clock generating clock circuit, generator written ification. Each clock specification clock system spec describes Fig. 6-6. circuit below general circuit 6-4-2 Clock generator clock circuit circuit.
  • Page 52 All manuals and user guides at all-guides.com P S V Aooorcx BMC* oorcx 4 O C - I P C K 7 > JI’ IC_38 spares; GRENB 53003522 IGMCK IC43 |C34 22 18 4Mc»< " f» 74\_so2P |C42 socns~aL xc 35 ’...
  • Page 53 All manuals and user guides at all-guides.com Circuits Generating 6-4-3 Signals System written Fig. circuit chart signal generating Timing system MHZ) which 6-9. signal (l.008 Fig. each signals timing charts l6.l28 then outputted shifted clock MCK, IC42 generator inputted signals combining these signals,...
  • Page 54 All manuals and user guides at all-guides.com modeChBHQ9 circuit 6-4-4 character Display circuit circuit character switching (fig. 6-8, IC38) display mode input side, characters characters. change display mode Each characters inputted. DOTCK, LOAD, CHRCK GRENBLE signal when IC38 input (SELECT terminal) characters mode,...
  • Page 55 All manuals and user guides at all-guides.com !C50 IC47 ’ vide Sigma genera 14|.s74AP 74LSOOP ale: o-mf ’ Ssmnmnnznm "’5V ’ IC47 2’ $ IC49 » ’ ». |¢5Q xn xx Eire M/us IC49 [Cys lC396Q, » . ¢ » . 74|_503p ’...
  • Page 56 All manuals and user guides at all-guides.com dlll lCl07@ lCl3C| lCI36 IlNTERL A-CE- se’ "+5v ’ |c13o __..¢_ 74L$74AP FIAo lCl07’_fi (AO) RAAI lllllll RAA2 ’2 " RAA5 ICl4| ’S |c14a ’I4LSO8P 74LS157P circuit Interlace switching 5-I4 Interlace/Non !--s;=5#$= 5 (lClI6fiPlX’L| V L I 1 ’...
  • Page 57 All manuals and user guides at all-guides.com ’ R & 3 ¥L $w2P - $4& "" gaze $429 anal $7E6 $757 9" |7¢| Fig. "CRT address Normal Mode 8Uch ‘ " " " - _ " - - _ _ - _ _ _ $427 ----- SC27...
  • Page 58 All manuals and user guides at all-guides.com ‘ 6-4-7 conversion switch circuit Display address Basic resolution mode. Master normal mode high mode display direction high resolution character divided raster mode, with This circuit display make character byte address. main address conversion switch circuit.
  • Page 59 All manuals and user guides at all-guides.com combination Displayed colour Colour .642 Pig. kolou ’go Flack blue ed’ aqen rØen ello white! meanin Colour Fig. biifo bitl bitz r?6§ IUQN ‹ d 3 N revere Graphi ’H’ xcssc] 1d@FF edOFF Chara.
  • Page 60 All manuals and user guides at all-guides.com SØ%Ø3Y ’FA "Ø (reffeSheperiodI|per§c§ § » \g.L0|S5’$-,E ’ Ø f § § ‘ ‹ 2 § § § § ’ Signa ’ ’ sa§§2§§g X§a§§Ø;§;w1X@§a§§;@YAD§aadfess aadfess colum ’ ’ swigcg signql ’ ’ mn’...
  • Page 61 All manuals and user guides at all-guides.com accessed) display address mode (other this used page case, character mode column address. address changing same clock cycle enough, display address display, piece continuous column address equaling ifit regarded address each signal output column address same.
  • Page 62 All manuals and user guides at all-guides.com Block Video Signal Generator each 6-21. explanation shown Block Video Signal Generator circuit below. Circuit Character 6-6-1 Generator circuit, character circuit. generator character 6-22 shows generator according data required character change output each character.
  • Page 63 All manuals and user guides at all-guides.com nAA| SA’ » ’xc|o7 sw.; 2 . E § yP0233Z3328 Circuit Character Generator Fig. &42 ucuz Q 5 f ’ § . ‹ t C Co1ourRAM |cuaetc Ionochrome Data video ideo Slgnalt si onochr 033051 generat»r...
  • Page 64 All manuals and user guides at all-guides.com Byte’-V \‘ $sbyi_e & ’ arg? - - ~ Whyte ilefn @Interlac EØgeh ern) Common fi Qich ern) Reoordin" Concept 6-23 Character ~enerato1= _’_ »¢ C a m |c1 12 :CUZ 74|__3153p SØi 5 .4 axcszs Qazasaaalpzasnu...
  • Page 65 All manuals and user guides at all-guides.com signals. this conversion period, shift/Load signals inputted ICll7 which makes possible video output signal during display period. Data from colour makes timing each character 1c115 input (LOAD signal)to with synchronize brightness signal which derived from ICll7.
  • Page 66 All manuals and user guides at all-guides.com Background colour |C’|’|5 Infomation 74LS174P BB" LOAD ICIIB ns , ’O CISS’ |‘LCI5i ICVI6 ’ 74L$158P 74LS175P ’ | 5 V 1’5V 31Cl3i 1C|I5 f-¢ v¢c IC|32 ’ ’ BIIIB 2sc121afi/' 2 r ¢ » | e §...
  • Page 67 All manuals and user guides at all-guides.com circuit Keyboard keyboard. structure general 6-28 shows Figure l5.75KHZ) X-counter Horizontal pulse clock signal (scan Input inputted count down IClO2) startsthe count output (IClOl. UECUUQP decoder "L" scans. this, output (IC86). counter IC102) singal (output input...
  • Page 68 All manuals and user guides at all-guides.com ’ ’t 4’ Load Cassette Cqlicul- circuit load clrcult Load cassette cassette 6-32 Fig. Flg. timing. input/output r."___ "_‘ ""‘ """f‘| Power *" §§¥fix lcvo ’ LS151P F § * - 4 - a f - | ~ ---- ’-- matched...
  • Page 69 All manuals and user guides at all-guides.com l C l 2 2 lC|23 ICI24 74LS93P 74LS93P 74LS93P r+zv +55v £m_(1_onsMH ) : ic w?; . v¢¢ lgfa gig. xmzamcx ’ zcuzz 2’ xc|23 §$1¢... » _ - - " 2 "gn |f’1 H’...
  • Page 70 All manuals and user guides at all-guides.com |+1.66us-I g1C9| 2.4.KHI~ lcxzs @9111 lcuzs from S l g SAVE ICIZS ICB4 Qfinput output Zpgie " ____ lctze lC|25 |ClZ6 tfl-,us ’3 " lC|25 "2c 2 KH1. UUUU1 ¥1§3’1putHH ‘ ICIQOZP ,._.m4,,S jilinput "’| 74|_s14AP...
  • Page 71 All manuals and user guides at all-guides.com Cassette Load circuit demodulate (sine signal l.2KHZ wave 2.4KHZ) digital signals. signals from recorder tape limited 1.2Vpp limitter (D3.D4) input ICl27 then inputted ICl28 (Voltage Controlled Oscillator). ICl28 standard this voltage circuit. ICl28 voltage which comparater...
  • Page 72 All manuals and user guides at all-guides.com communication RS232C (HD75l89P) (HD75ll88P) ICl2O ICll9 following features. have interface receive/sending line driver) HD75l88P (Quad limit input date switching level which outputsthe upper High voltage this circuit, VCC=+l2V, VEE). limit voltage (VCC, lower Power VEE=-12V line...
  • Page 73 All manuals and user guides at all-guides.com L/$31 T i I I \ ‹ | 1 § 2 [ 3 | | ’ 5 1 5 $ l 8 | 9 | l D I l l | ‘ 1 2 | jsrØpxfisrifpzi lsqnr’...
  • Page 74 All manuals and user guides at all-guides.com from’ =»-mnVi‘ |curfi Rswsw Cassette nszzzc ’ ’ra C f=\m f1 " lC12S»@ mcusiij lCHS@ lcllgig "g: XCB4 nszszc ’ from » OI1lY :clams m\_s| ’O H 13 ’T |fC§l .I U Icgz ’f Ern.
  • Page 75 All manuals and user guides at all-guides.com |C105 74LS05P 2; 21 :I 3 5,4-5 ¢,,,-¢ [css "’ Tl 5. an-9 2’ p g - 3 »r rcsu ’ »=s¢ #R £528 sig. TCIOS 1-:EA 35-| P8313 C|O5 E‘2 ’Z rcnos 95"...
  • Page 76 All manuals and user guides at all-guides.com Other circuit circuit 6-9-1 generating Sound described circuit fig. 6-44. generating Sound SEL,eoLmd decoder MUSIC address output rising edge system 6-45 shows data IC93. Fig. timing signal after latching outputted circuit. chart generating Sound circuit which...
  • Page 77 All manuals and user guides at all-guides.com block interface 6-9-2 expansion system which enable incorporated connectors expansion level master memory used expansion connectors also expand dynamic memory user Following expansion power. additional peripherals easy block. interface expansion explanation system expansion connectors connected general...
  • Page 78 All manuals and user guides at all-guides.com k)RAM (b)RAM8KByte (;)standard expansion expansion maxi ’ " ’ ’ ~------ ---~-- --__ 1512 (xaxbyte *RAM__ ____ __..__ ______ $4000 area _RAM » 1_;_E_- $8000 erna =1rd anslon ,:§f£>§§_______ tØ Raid* SA000 ’__ ‘...
  • Page 79 All manuals and user guides at all-guides.com terminal expansion nmamemory SN74LS245N ldata RAM’ ’ » data ’ B y t e - address £a9sEL Qlrcu asia? g’ ’ AESEL RAMexpans’ termlnal expanslon memory 5320 ($C000-SEFFP) 59FFF addre select Ølg (xsxbytg ’...
  • Page 80 All manuals and user guides at all-guides.com Unit Block 6-10 Power consistS which regulator supply insulated unit Switching power power obtained. circuit. Also, output ON-OFF generating single forward small obtained. Further, voltage +l2V output amp. chopping down output, circuit, totally terminal dropper regulator...
  • Page 81 All manuals and user guides at all-guides.com circuit. details regulated 6-49 explains Fig. D100 flows through when flows through D100 T100. Total becomes wheel diode. When stored energy regulated output. which makes ICl00 width control R112 C112 connect pulse r " i ’ r r ’ n i + ’ i n h11’i‘|1’...
  • Page 82 All manuals and user guides at all-guides.com Other circuit 6-10-5 circuit. unit following protection block have Power circuit Rush control current rush resistor regulating circuit, current control when current power both efficiency when thyristor conducts, controlled power direction done forward regulation only that...
  • Page 83 All manuals and user guides at all-guides.com Level-3 Basic Master configulation standard memory expanded memory each memory refer Please Fig. described address decimal 0000 work areaw ’15 0400 __" ______ _______ Hlsplaywnnr ----- < CA1nn, oro-r ffm, area. --am ____ work area USE!
  • Page 84 All manuals and user guides at all-guides.com ADJUSTMENT METHOD circuit 8-1. adjustment main power 2V+/- oscillator sine oscillator, output Prepare wave connecting cassette jack shown Fig. nugger oscillation. 1.7K number terminal inserting ohm,seria1 measuring impedance, then voltmetre which than input more TP13 TPl4...
  • Page 85 All manuals and user guides at all-guides.com Timinq Adjustment System required. replace 1(HD6809P/MC6809L), following procedure unit. MPU(ICl) number Confirm grade done necessity confirmation number grade wires Cl87. jumper combination their avilability Table shows each position shows wires Cl87. Fig. jumper wires Cl87.
  • Page 86 Confirmation 8-4. CAPACITY switch operation switch "l" panelthen MODE power Press \l4l72\ FRE(H)[ confirm display command screen PRINT Input ’ HITACHI LEVEL BASIC version high This case Microsoft iiigglgggeØcØriieg resolution mode. Ready PREM) input PRINT confirmation display 14172 Ready "2W.
  • Page 87 All manuals and user guides at all-guides.com SERVICE POINTS this section with photo’s change actual unit. cards option sold photo separately. Remove screws case upper which hold case upper then Fig.9-2 Fig.9-l, obtained. §§%§§$s&3£i ,;§§§$5§, F l g Fig.9-2 extension card screwsfi...
  • Page 88 All manuals and user guides at all-guides.com screwsgg BM-A P.C.B. By loosening removed P.C.B Fig.9-5, BM-A f__Db Fig.9-6. Via’-:H ’Q ~*’ g§;jy;_ ..._ ’ ’ ’mf fall# /I .-..;_z ‘=.Ø»v~. =_,..,, *Øs ‹ _ | ;j‘ ...=::" " ‹ ’K "T:%j"_’;1;¥;;t ’ii’...
  • Page 89 All manuals and user guides at all-guides.com Switch ELILT usage; different switches built Level-3,four various conditions. initial_state when switch switch(SW); setting power switch(CS1); setting switch Chip MODE content switch(CS3): RS232C baud Chip setting rate thecommunicatiom condition Chip switch(CS4); setting RS232C. When setting required,...
  • Page 90 All manuals and user guides at all-guides.com switch(SW) switches shown Fig.1O-2. different switch consist initial after each switch, states position power TablelO-l. switch shows state("1") positioned each white OPen they to{}side i n , p o s i t i o n . Close state("O") meaning...
  • Page 91 All manuals and user guides at all-guides.com (CSl) Chip switch ofth9 setting content switch (CSl) change Chip described condition which setting standard switch. MODE corresponding connected switch previously, MODE selection ch/line ch/line this, switch No.3. switch connected switch. MODE possible MODE 0 P @ 1 ‘...
  • Page 92 All manuals and user guides at all-guides.com Chip switch(CS4) condition sending/receiving chip switcn(CS4) defines communication interface. RS232C outputted inserted outputted [___ ~ ’ \ ’ / 1 - ’ * ‘ ~ 56 psi outputted sig. outputted :O ml ’ EO OE active sig.
  • Page 93 All manuals and user guides at all-guides.com Pzewri SCREEN ’NE *5V. " +|2V. ’norm (power unit) pin? (video signal generator) ag at § § pin? (timing signal generator) EØion sig; 433 ) (RAM) ’ e2§%;§l§ bus) (data gulse address decoder oircu QØsgai 1‘...
  • Page 94 All manuals and user guides at all-guides.com NORMAL @ ‘ r > A r A ’n "g" Eevel. " - § 3 * L 2 ~ 9 3 1 Gi" lc" lC27 |C12 lc" ncnaa |¢91 |4335 IC" ’ ’%¢5 ‘t Eine? 2252...
  • Page 95 All manuals and user guides at all-guides.com SIGNAL NDRMA TIMING qn5§§ IYES ’ ""’ ’YW it38? ulse i i3 D i n ’C4 %g§§ie§ pg ‘ ‹ a § l ‘ {f i pins IC38 5?33. IC36 IC40 No w correct »...
  • Page 96 All manuals and user guides at all-guides.com DATA- PRQM _RAM NOT- Running below program each form wave which described chapter s>§§?f1ei;3,; o¥a¥§" POKE &H6000. " I=I+1ZIF corox 1>1s lC56~lC75- COLOR I Z P R I N T H I T A C H I lnØ...
  • Page 97 All manuals and user guides at all-guides.com IDEO SIGNALS riqhØnea grciififfØpl _ grciifi ffØpl »ulSe *p ar C117 15pin? pin5,7,1O; pulse H " ? inputted ‘ l29,9 |ci|5 ’ ¢ :cms P1-1lS@ uczs ~utputted -pin? ICIIG vcwl ncns -ulse nputted 18,15~‘...
  • Page 98 All manuals and user guides at all-guides.com INCORRECT ENTRY should observed waveform when pressed orking? Ic99, pear » r’.zz:.’|’ ¢ stilke @5121-1-a -i».n.-.4- ’ ’ &3 puls- inputted~to >’9p1 chlp connec ,¢w2 contact keyboard » ulse appear Ol&1O ‘ lCl0I lCl02 outpu’...
  • Page 99 All manuals and user guides at all-guides.com GRAPHIC MODE DEFECT H. 7 »~ ISS. work :Cuz |Cl29 IC39 4,lO&l3pin? |C40 ICSI ICH! ICII4 Defective...
  • Page 100 All manuals and user guides at all-guides.com QPEECATE DOES *waveform should observec after release time mask -nputted PGKE sfHFz=n4,c eve* sec. ’ ICli :cas ’cm ~uls- ’nputted sec. IC1~,~¢’ -ulse lnputted sec.»t» IC22,2~‘ :cas waveform should observed after outputting sound program 11qp pe;;_’;;...
  • Page 101 All manuals and user guides at all-guides.com B=§10} SAVE/LOAD CASSETTE SAVE Only :ca_n’t LOAD ’ done ‘ ognes pin-? " *iapee output in_ kh.-g p *record ’ pin;norma *relay YØs circuit ’ ’tt raigiigaxe ‘B) ‘ """’ correctly ICll djus 9pin;norma»...
  • Page 102 All manuals and user guides at all-guides.com fliililjgf PRINT OUTPUT -ppear f-in printer ulse outputted IC85 ICWS LIGHT PEN-DOES WORK orrectly -djusted R " mlssadj stment ppear ’ &2 -pln defect utputted ’ ’ » ‘ outputted 9p1n ‘ Defective...
  • Page 103 All manuals and user guides at all-guides.com ABNORMAL»POWER ’ IIIKUB nector pull then from power unit adjustment) (;efer; dumuv load power f ‘ f \ 1 \ l \ eonuoe- power (from lead ‘tage -~TH13¢ output volta-- load defec appe-#L 45,+12v ‘...
  • Page 104 All manuals and user guides at all-guides.com METHOD OPERATION CHECK After trouble shooting repair, fgllgwing ghggk qparatign quired. 12-1. Connecting method; normal inbuilt switches operation check "CLOSE" No.1/»No.3 "OPEN" ,No.4~»No.8 condition(dip switch setting switch "0"). front panel MODE shown Fig.l2-l operation check Next,...
  • Page 105 All manuals and user guides at all-guides.com file item content test program MOTOR, czlxs-c interface SAVE ,vEP_rFY, cassette ON-OFF KY-PR interface test data printer ‘ control line & SPK-C varible test speaker sound oscillating sound interface operation test LP~C light line receive/sending RS2-C...
  • Page 106 All manuals and user guides at all-guides.com agus JignØg ’ 1011 wØr ¢ conf; -ceo ’I ¢ Display Mask R O M t ; e s t ’ rogramma~ ¢ correc *="=|’> ’=¢’ HGSK TEST =|=|==|-mv- circui = * = * = * CHECK -ummm ‘...
  • Page 107 All manuals and user guides at all-guides.com from previous page display display colour igggen o?fi " ¢ E ¥ Ø check colour pre gl k ys Y ES magenta Press Cyan |e5nmN|k@V yellow L--_J black blue green ggØggr §A§Øl gglopgy ilgg ’eerilggCircuit nga:smannusixansu Circuit...
  • Page 108 All manuals and user guides at all-guides.com previous page from " a§e screen Press EE§E§ Switch ’cwer ’Øggic aigcter § § @ § h § § @ imin 8S%S§%§3§ gsesf e §Pa§§1 §Qe4 Q EQ-~Øw?’@ 2433 ower mode Screen graphic test Mode Check...
  • Page 109 All manuals and user guides at all-guides.com from previous page E218 Øls rgigriggieg lnterface t e S f cassette Screen qrap naml% 5i9"aL aØraaegi » P I ‹ S S l P H l P ¢ q keys as-H- Ready ei §...
  • Page 110 All manuals and user guides at all-guides.com P a - E e previous from tØsi speaker displav screen test volume speaker nf1rm soun cnanga confirm volume, turn ange sound clrc test screen.of lightlpen Einv-.. |r\nlvru\| uuuuoooco 9¢t .’7 oeonoaaaaur ‘ »...
  • Page 111 All manuals and user guides at all-guides.com R N"¢( test) mask REHl|4~1um PlB~S8SO HRSK TEST PRDGRRK U l ’ * \ * SCREEN OIHIDTIIAD PQSK TEST *’** ’*’FPRINTtPRINT LOCFITE PRlNT’¢c¢\ca f|DRSl&H7000 " REED FURI’0T0h0 C D D C l V R L ( ’ l H ’ * H 1 D l ( C R $ ’2*l\~1¢ POKE B D R S U - C D D ‹...
  • Page 112 All manuals and user guides at all-guides.com test) (fcolour COL-C scnesw o.x.o=uxornao - r : s 1 c.o¢.¢uA Locnrs s.::vnrNr~~- " " ’ 5 YE!-VOM/’ 4»u¢»< cwmg - \ = » 4 » u ¢ » < c w m g Y E ! - V O M / ’ "...
  • Page 113 All manuals and user guides at all-guides.com KY PR " prlzgger ¢ lnueruace SCREEN 0-1.0!HIDTHAO }fE7§04&P LOCRTE 0¢3IPRlNT’ Tf6T M*v’ RSCZO) IBLS FORK ~lTOX9 PEDD R$(I) NEX-T DGT9 ’ l Q » ’ R Z ’ » ’ 2 5 A 5 S ’ » ’ 7 S S O ’ sara "...
  • Page 114 All manuals and user guides at all-guides.com LPC( test) light LIGHT TEST PROGRRH *l’**¢ 1104"-O’ ***** NITQCHX V O K G - W i l M URKS ***¢* SCREENOIHIDTHBO COL.C|R7|0 PRINT’ ||an-cwovnmfn-on LIC,/~/T 7’¢-xfto-no-meanest P E ¢ 1 l ( S | 7 ) - ( 1 3 | S)|2!(20v7)-(261 9)|3|(30|7) (38v A|(44...
  • Page 115 All manuals and user guides at all-guides.com test) interface $2-C(RS~232C SCREEN OIHIDTHQO LOCATE 0-IZPRINT g5-232g Inpug T557 mum’ LCCQTE 0 S 2 P R I N T " ’n~a1~f-15m L’ "-- 1496590 P R I N r = P R 1 N T ’ 1’ERr1’e;HRsc|.H22>1’...
  • Page 116 All manuals and user guides at all-guides.com PARTS LIST position circuit circuit J’ r’ef’ f’ r’ e Part qtf’ HQMQ part PPQY CGW* MB-6881 oo9oo P~1ne\ A Msfeseo ’ oaxoo swow 07100 cover; uovev » osxso C10-118 osooo QUQVQB MP-3030 osooo O 3 \ f % Q U.cu1Q1‘...
  • Page 117 1L5’LHD74LS32PMmssz02100 HD74LS32P Mmssz 02100 ’L :cas HD74LS02P mrsaso 06000 IC34 06000 xcss HD74LS66P MP-1010A 07100 :cas Hmesossn Ms-5090 05030 IC37 MB-6890 sm4s1s3N 03500 rcss HU74LSl57P » 02200 icss HD74LSl7-IP MB-ease 05300 1c40 HD74LS283P MB-0090 01300 1c41 HD74LS367AP Ma-esac 04200 HD74LSl64P...
  • Page 118 MB-0000 00000 » 1c95 1~1m41.s051> » 00000 1c90 11m41.s0s1=> MP-3530 01100 L S I lC97 I-{D74LS32P MB-6881 02100 xcss HD74LSl2SAP MB-6890 07100 IC99 » HD74LS74AP 05000 IC100 HD74LS04P MB-0000 00000 » LS I 1c101 HM4LS93P MP-3530 03200 ICIOZ » 03200...
  • Page 119 All manuals and user guides at all-guides.com f c \ f ¢ w » 1 L L 3 % c\f¢w»1 PART Name part PQ¢£_‘ref‘ IC124 L S I Ma-ssso HUl|LS93P oazoo 1c12s Hm4LsooP Ma-esso oeooo xcxzs 1~m1u_s14A1> Hm41.s14A1> ossoo » L S I ICIZ7 LM565CN...
  • Page 120 UN I T 00100 IC100 MB-3159 MB-6590 ’ 00100 zczoo ’ xcaoo TA79u00sAP 05300 IC400 01500 »Pc14sx2H 2SCZ149L/2SC2931 013.5890 01600 istori trans MB-6890 Qxos 2SC1096(L) 03300 2SA733P 03100 Q130 » zs/usa? Q200 zsczsxs MB-6890 02900 ’ zsssosx. 00000 Q201 » 2SB605L...
  • Page 121 » l33§ acmoa D458 » » MP-asso RDIZEBI ’Zemf zmos Ma-aaso RDIIEBI ZDII9 1351 aDs.ssm zD1so o1ooo » RDISEBI ZD230 MB-6890 lwasl-:az >2_@_y\@y ZD23l » RDIIEBI znaao 1:19 nnxasas zmao nnzoem » ZD43I SJVZY oaaoo \f‘\ Ma-esso +Y\\/ sP2M 1111...
  • Page 122 All manuals and user guides at all-guides.com...
  • Page 123 All manuals and user guides at all-guides.com...