Mitsubishi Electric X-7, Service Manual

Page 1: ...ren rrf a x 7 îu Ngq u N r MooEL 7 7 cRotr CFriA Duru 9 4 vrs p Rt q eèsgoRt s 4 9Sy eo l 7 u sg Dzz2 ollb J Èe X PUAEUÉAvArvr Du ru rR covÈtRÀss y e r lu ITSU BISH I ELECTR tCCORPO BA TllrN t tno 4i7 9 6oo Tot re tYstv h Y CAfàl N ÈT Slvnbc t ttoS vot e 16 l ù r t I 1 x 7 us 4 co 60 F t tTBr3 ...

Page 2: ...iption the mechanism assembly hasalready beenremoved from the chassis unit 3 l Disassembling of head pinch roller reel rest and playidler 1l Remove cassette holder CSringl Fig 3 2l Remove pirrh roller panel plate CSring Fis 4 f l t t t al th ss to ptn le 2l ew Fis 1 to removecassettemechanismassembly chassis unit counter belt on the counterside isconnect lead wires J410 420 of mechanismas from PV ...

Page 3: ...a t i o 3 O d B S p e c i a l 3 0 H 2 1 6 0 0 0 H 2 LW sestion Metal 30 Hz 17 000 Hz T u n i n g l a n g e 1 5 0 k H z 3 5 0 k H z Sensitivity S N 26 dB 1 mV m GENERAL tmaç resionse râtio 35 dB Power consumption 110W lECnominal 2 Dimens ions Wx HxD 41 5x4 76xt 8nt T l AMPLIF ERsEcrloN 116 g 8x18 314x7 71616 1 ô ll l Zt Poweroutpùt 2owattsSohmsJkHz Weight 13 5kS 29 8lbs 1l L i E r t v i a l r t Tot...

Page 4: ... belt on the counterside lead wires J41 0 420 of mechanism as from PV board five mechanism assembly fixing screws 3 x 6 of the five screwsare used commonly to fix the knob 3 How to disassemble principalpartsof mechanism In the following description the mechanism assembly ly hasalready beenremoved from the chassis unit 3 1 Disassembling of head pirrch roller reel rest and playidler 1 Remove cassett...

Page 5: ...ASSETTE DECKSECTION TYPe 4 track 2 channelstereo cassefie deck 0 5 0 8 4 5d R 7 7d B 72dB 70dB 65dB 35dB at 1 kHz t l d B 3 O H z 1 5 k H z 525kHz 1 605kHz 300 gVlm 600pVlm 1 O 30 dB 150 kHz 350kHz 1 m V m 35 dB ERASE Ferrite Wow andflutter 0 06 Wrms Signalto noiseratio Weighted Metaltape Dolby NR out DolbyNR in Crosstalk Between channels Betweentracks Total harmonicdistortion Frequencyresponse No...

Page 6: ...irection 2 Turntable holder 45 adaptor and spring are removed I Removeback tid of the unit by removingfour fixing screu6 T2 3 x 12 and hold tr rrntableand flyralheel by hand Then turn turntable counterclockwiseto removeit from shafe 6 How to removeplayerunit 1 Removefour cover fixing screws Tl 3 x l0 below turntable 2l Hold tone arm base with finger and move it towards centreshaft andstopabovewher...

Page 7: ...escrewM 2 6 x 10 5 Removeidlerspringon the idler side 6 Remove spring for drivingheadbasel 7 Removeheadbase 8 Remove idler PLAY lDLERI Note 1 Take care not to losethe one steelball between holder and headbaseand the threesteelballsbe tween headbaseand chassis base for Hgod Bos Drlve F i g 6 3 2 Disassembling of flywheel and belt MAIN REEL AUTO STOP 1 Bemovethe RECORD PLAYBACKlever One screw M2 6x ...

Page 8: ...werlC andtakeout s c Q Fis 20 ADJUSTMENT PROCEDURE TURNTABLE Section o Before adiustment remove the back lid from main bod and place the player horizontally 1 STYLUS HEIGHT ADJUSTMENT 1 Remove the main turntable belt and the horizonta motor belt With no record lift the tone arm basewitl the finger and move it to the centre of turntable Pres the actuator of REST switch to put the switch intr the ON...

Page 9: ...arm be sureto carry out adjust menL Fig 17 8 How to removemainmotor 1 Remove backlid of the unit 2 Remove mainbeltfrom motor pulley 3 Removeone motor holder mountingscrew M3 x 25 4 Putl motor holder in a directionshown by arrow in Fis 18 5 Disconnect connector J9 from logicboard 6 In thisstate replace motor 7 Reversethe above procedureto mount motor holder Robbar Cushion Fis 18 9 How to removetune...

Page 10: ...eoutputterminal thenlower theinputlevelbY30 dB 2 Testtape AC512special 3l Location Semi fixed resistor VR541 L vR641 L 4 Procedure Adjust so that the output level during recordingand PlaYback of 400 Hz signal becomesequal to thatduringmonitoring ADJUSTMENT LOCATION DIAGRAM if 3 Adjustment of biascullent 1 Setting Sameasin ltem 2 above 2 Testtape AC512special 3 Location Semi fixed resistor VR561 v ...

Page 11: ... TIMING Note This adiustmentshould be madewith the player detachedfrom the cabinetmain body 1 Put the player into a state of 1 1 With the tone arm raised turn the pin F to adiust the clearance be tween the pulley C and pin F shownin Fig 1l to 0 5 t 0 3 mm 5 ADJUSTINGTHE LEAD INPOSITION 1 Removethe back of player while keepingother com ponentsin the actualoperationstate 2 Adjust the cam pin G Fig 5...

Page 12: ...tioniswithin t 1 gA of the valueobtainedwith the tone arm raised 7 Gonnecta voltmeterbetweenPIN I and GND of main PV board and adjust the presetresistorVR 101 till the voltmeterindicates 3 5V ADJUSTMENT LOCATIONDIAGBAM 7 SERVOMOTORSPEEDADJUSTMENT 1I Placea test record on the turntable and connecta fr quency counter to the output terminal of player v anamplifier 2 Removethe back of player and adjun...

Page 13: ...D TESTTAPES l Low frequency oscif lator 20 Hz 20 kïz 2 Variable resistance attenuator 0 90 dB 0 1 or 0 5 dB step 3 AC voltmeter Measuring range of 2OHz 200 kHz or more input impedance morethan 100kçl and 60 dB or more 4 Frequency counter 5 Oscilloscope 6 Testtape MTT I11 3kHzl MTT 215C 10K 315Hz 10dB NORMAL o MTT 150 400H2 dolbylevel AC 512 blankl 7 How to connectthe instruments 1 Connecta load re...

Page 14: ... the AC voltmeter registers the maximum reading DIALCORD STRINGING l lo 7ê o Lz 5 ç 5 Set the AM SG frequency to 1400 KHz Tune the se so that 1400 KHz can be receivedfrom AM SG Adlus the trimmer capacitor C302 so that the AC voltmete registers the maximum reading 6 Repeatsteps2 through 5 several times 4 Adjustment of LW 1 Obtain a stateas in the ad iustment of MW 2 Set AM SG frequency at 140 kHz T...

Page 15: ...mumreading ADJUSTMENT LOCATION DIAGRAM 4 Set the frequency to 88 MHz Tune the set so that 88 MHz can be received from SG Adjust tuning coils of L201 and L2O2 so that the AC voltmeter registersthe maximum reading 5 Set the SG frequencyto 108 MHz Tune the setsothat 108MHz can be received from SG Adjust trimmer capacitors ot Ç2O2 and C206 so that the AC voltmeter registersthe maximum reading 6 Repeat...

Page 16: ... A M O E I AFC OUTPJl DECOUPLiNG F I OUT r O r 3 G N O I F I N F M FM MUTING OUTPUT N z a 4 5 o I 9 ro t2 t t Rest PorIo Cov f Clos flt L n JIJL L JIJL IN 5 ô t H Cover Op n J JL L nn H J1IL J1IL JIIL JIIL r 5 r H s203 tll CuÊ lRen Poel on H JI IL JI IL L JI IL J IL JI TL JT_IL H s2o4En Srafr JI IL JI IL JI TL H JI IL L JI IL I szo2El Sroo JI JL L JI TL L H J IL JI IL JI IL v c c 5 5 3 S q 9 V F ...

Page 17: ... JI TL L H szoz E SIop Plây A r m R i s i n q H i L H L L JT TL h JTl H H H H I L JLJL i l l JI TL L H s202 A m Outwârd lLeed Outl H L n rl J JL H L H L ill JIJI TN L H El s2o4 L H JLN L JLTL 20qr JTLITL i2n rJ H L L JLTL JLTL 2 0 d JLTL 2 O t H E s2o2 I H L L JT J JI f zo s F JTLITL 42 l H JLTL 2 JLIT 0 t t JUL H Auro Ênd Oelectron L H L Jn_m n n H H H n I L L JI IL nn L H L Prn No Actual 4 3 4 Â...

Page 18: ... BLOCKDIAGRAM TUNER SECÎION I I I a l J i llrlI I l l J l I i r î l T J TAPEDECKSection lC50l STK3l6l I rf lo OECKSECTION 1C701 ilP0l5590 1C502 TA7629P I t riiil l iii i t iiiirir Æ21 HAl397 r ...

Page 19: ... L A I A I S O c m L A I À 4 L A I A 5 L A I A 6 L A I A T A U X T U N E R PHONO TAPE C A R T R I D G PHONO EO AMP Q47t o472 ARM POS rTroN DE TECT t 7 2 3 f 5 4 BIT M CRO ta PROCESSOR S O L E N O I D D R IV E 16 ARM rl HORJZONTAL CONTROL r5 0R tvE A R M D I R E C T I O N CONTROL t I C O 3 Qr1 8 il 9 3 3 4 5 T T oD MOTOR T T MOTOR S W I T C H I N G P O W E R S U P P L Y 18 ...

Page 20: ...FILTER 455KHz o205 IDETUNE Q a l Q 2 t 2 DECKSECTION R E Cæ P B s 430 IRECLEVE LI PB EO AMP I C 5 0 l 6 0 1 1c502 602 TURNTABLE SECTION lsrzEl tPosrTroN I nesA E E FEPEAT l IsPEEdl IIEPEAiI lcovER l lwoRNrNG I r rr J osst Y t RECEO R E c P B s430 A M P B lpoLBy l B I A S osc U N I T IBEAT CANCELI 17 DI A 5 ...

Page 21: ...WIRING DTAGRAM TURNTABLE Se ion SWITCHPC B BLX WXT GRY to Amp S cf lon P TR P C B LIFTlCUE SoLENOtO cHASStS EARTH 16 næl 1 9 ...

Page 22: ...irt Golon m abbroviatsda3folloffi B R N B r o w n Y E L Y e l l o w P P L P u r p l e R E D R o d G R N G r e e n G R Y G a y O R G o r a n ç B L U B l u c v H T w h i t e 8 L K E l a c k PLATTER SIOE T T MOTOR l HORIZONTAL MOTOR lozoz 0 i i TABLEP C B lo Amp Sccllon ...

Page 23: ...fort ol wir6 mzy dillet ttofi rhæ ot thit dirg sm Wire 106 c sbbraiErcd ar lollo6 8RN Brown YEL Yellow P P L P u r p l ê R E O B r d G R N G r æ n G R Y G n y O R G O r l n g B L U B l u c W H T W h i l B L K B l æ k 2 Psrt rymbofircd  ae wry iûa â nr lot alery rnd crlormrc Therefo e us by all msnt d6ignaled Partr whcn r placrng 22 ...

Page 24: ...x 7 E DECK AMP TUNERSection s453 C V E REVÊW ERil _ R E D ORG 0 b Ttllï1 o o o E H E A D ORG æ O R G P O W E R TRANSFORMER A Jlt 21 TAPE INDICATOR ...

Page 25: ...t srop lead_in Arm lowering sta t Arm rising stan end delecrionl A m tward movemenl Not t I CR unrt t È l t o l t o l t l t l l o l l N l L l AîfW Ff oôf ul R t o 5 L V T U Z o t v t o K Ejv q iif 36v it l i b ô l _2 otot Qtoz g SIZEDETECT SIZE ARIVI POSITION ntr TE 1 MI CRO PROCESSOR 9v O I V O V u Jl 9 5 V xf l trx 9i o 99a o r j D t z l 1 Jvv TiÀT na t tl rrr rv i É v v 4 T C 4 0 8 t B P I R l ...

Page 26: ...ETECT tot 220K Qt20 o12l T T MOTORDRIVE 4 Th Gir it dilgr m thown haE it e buic citsit disgt n lnd mly br flÈi d to moditictti ot ntu tlt du lo impreÉmm AN L A I A 3 lcaRJJ pcËl FROM AMP lîRMhNal LA IA4 L A I A 5 L A I A 6 LAIAT o k O wittrstæd at in a Est stale Rt77 coN 12 Ql24 Ol25 VOLTAGREG in paran ...

Page 27: ... r z c I l5o l IOrA n ltz 7 c rn1 t v t A Z l Qt At ot A2 PHtOt S ZE lTEsTl E E E IREPEÀTl L J J fiTl l I woRNrNc I ota rr Dt 4 D l o l l t 2 l Dt 14 JDS44 l Ët bl I t l l l l N l t t Q t A3 ot a4 PHIOI POSITION OETÊCT q R N r E 0 l Y l n i È ARM HOR coN S I A I s r a 2 GRY 22K OV Not I CR unit Arm horizontal inward movemenl Arm horizontalinwardmovementsrop teadin Arm lowering slârl Arm r singstan...

Page 28: ... 3 t o 0 V R I O I 2 2 O K ro3 2 2K TOR DETECT otzo ol2l T T MOTORDRIVE Qt24 Ql25 VOLTAGREG Rt94 toK 4 Tha circùit dilglrm thown h n 13I bltic cirdit disglrm and mry b lubi d to modificdim of æntbntt d 10 E O impDsm il k Q e withstand at nim i n I E t i l a t e togp in Pa an ô È v tcaRrRrpGEl FROM AMP lïRMlNp l f n e co 81 l8 rqArYf 24 ...

Page 29: ... 1VOLTAGE DETUt E I MUÛtiozv_oDL 3 l 3 Qzr 02 t7 2SC2603 FM Signal AM Signal Audro Signal for all pans are measured in lerms of DC digrtal voltmeter circuil tl9u e thown hete i3 the basic crrcun Pleasenole thai change in dlmenllons 26 ss a resll of improvemenB etc ...

Page 30: ...5 c3r6 22P R249 2 2X 5 C32l 1 OOI s203 R25 47K AF AMP RZ33 560 t 3i î Êât HA r24t3 rr arrae tffi AGCSWT rrou lxS I læ l6v I v v 3 2su i r ïeZEl KB 4424A FM MPX 1 t u t3 l I D2ol r I SLP 6OC Xim srEREo tNo l v 2y c272 to 25v NOTES f C and R unil 2 C No symbol F P symbol pF 3 Capacitor without voltage display has pr sure resistanceof 50V The NP is Nonpolar CaPæitors R N o s y m b o l Q K symbol ko M...

Page 31: ...of âfe vit t for mâintensnce ol ftey and ærtormânc ga turr only dcrignated pâ rr àrc uPc lot rcplacemcnl 4 The circuit figurc ahown h re ir lhe b c circuit di gr m Pl not th t chanF3 rn drmenron3 mav occur r a r rult ol improv mrntl tc c f 2 1 f f r y VOLTEGE REG it I Ï i l I J lil a E n H ii E a 8 2SAilt5 2SC2603 4 ri rîæ Iri e c 2S0330 i rï l 1 i n rl 11 2S0r0t2 ffi i J a0 2 SPEAXERS l lAp 51AMP...

Page 32: ...Û lAl gOARD o42l sa2o DOLBY 0422 zsÀtlls ô t zsczeos I I N FAîY I Raa 27q R P HEAD R E HEAD 3Éooro o 2213o 2 j 2SOlOt2 3 3 X F492 2Z ffi PLAYER MUTING J47r MtC g t JI4 PLAYER JIOPLAYER PHOT O IIfUT fid ËÂ lREcEoaMFl F 4 o 2 2 R E C P L A Y I 5 L R 4 7 N rcH I c6l I r o ou lh ï t L_t_l I oj PHONOEQ 27 ...

Page 33: ...1_t t t V à 3 s t A 2 G N O iel igl 4 il Tl I o l l L li J l o ...

Page 34: ...PRINTED CIRCUITBOARD TURNTABLESection o W H T o o o B L K G R Y toTt il 29_ ...

Page 35: ...t t l t ô l i r Æ I t v 3 U l N I a o T l L J r J a o 32 J P 6 O R G oo rô n l o l l l oll loIIR I I t 5 toii LO U ë ...

Page 36: ...as ll 4 l t ê 1rao tJ t1o rooTl o Rt J gtt O c24o I Bm r gl1 û 5l J tl c25l R2 o t I l r E e _ a a a J I i c lj ir1 ts T3O3 R229 1 r t l r_lS ë È iv É l i i tl l ilp a a Li_ _ j J a 1 r R23r L J l È l 0 t o l a l Yg _ï 1 lF 1t Yv c3rs i i R27l 1R276 R277 ts vu R2AO F l f t v R272 R275 R278 w 3 0 PL Oz Pl 20l ...

Page 37: ...l I Àô Aô ôÀ i L J I i _ 3 l L i C F f t l rfr II lî 8j 1 è ai rtÀ jàf r rr iq H 1 i 1 4 1 l gl çar eT iii æ i frT i li f i rï î i îfr SgP I t T t t Irr 1 _ 1 a i R E C Â X B O O R L R R L q lliiri Ë ii _Cf l oro Ë l t i Ë 1 t t tl I i I ï t i F ï8 rii l l 34 ...

Page 38: ...TAPEDECK AMPSection ...

Page 39: ...D426 D427 D431 0432 D433 D434 D435 D451 D901 D902 D903 D904 D905 D906 M07556320 MO7556320 MO7556320 M07556320 M07556320 M07556320 MO7556320 MO4179320 MO5240320 M04179321 M04179320 MO5240320 MO7228321 D5442 D5442 D5442 DS442 DS442 D5442 DS442 SLPl 6OC sLP260C SLP46OC sLPl 60C sLP260C 1 0 E 1 384841 LC1 R D 1 5 E 8 2 R D l 5 E 8 2 384841 LC1 R D 1 5 E B 2 RD15E 82 lCa rc50l rc502 rc602 rc70r tc721 t...

Page 40: ...3 M07390303 M07390303 M07390303 M04070304 M04070304 0101 a201 0 202 0203 o204 0205 0206 0 207 0208 o209 o210 ct211 o212 o213 o214 o215 o216 o217 0301 0302 CËBAMIC FILTER CERAMIC FILTER CERAMIC FILTER TERMINAL BOARD COIL ANT COIL RF colL osc LAMP LAMP SW PUSH FM AMI sw PUSH MUTING MONO sw pUsH MW LWI FILTER TRANS IF FILTER MO7532rt45 M07532445 M07566445 M04167576 MO41 79511 MoÉ l79512 M04179513 M04...

Page 41: ...31 1 M0760231 0 MO7527344 I llO760231O M04179311 MP1 320sL TC4081 BP MSAl17RS TC408 l 8P M5232L o A t a 1A2 01A3 o1A4 o10 1 0102 o1 03 o104 0 11 1 0112 0 11 3 0 1 1 4 0 11 5 0 11 6 o l 1 7 o 1 1 8 0 11 9 Ql 20 Q121 MO7137303 MO7137303 M071 37303 MO71 37303 M07390303 M07390303 M07390304 M07390304 Mo7390303 M07390303 M07390303 M07390303 M051 4731 2 M07390303 M07228303 M07390303 M07r393 X Mo5147312 M...

Page 42: ...l Cord Ass y Terminal Board Speakerl SW SIide BeatCancell OSC Unit Shield SW Slide Rec Playl VR W A50K 30 Rec VRI Terminal Board SW Rotary Selectorl Jack Micl VR STD 4 Bass Ïreble Balance Mixl SW Ràtary Tape Selectl SW Push Dolby Knob Dolbyl Jack Phonesl Screw Metal 3 x 8 Panel Front Holder Z Knob lPowerl Clamper SW Push Powerl Holder M0 172480 M04179420 M04179359 M04178200 MO4177250 M04r79565 Sym...

Page 43: ...ilnlilflnffiilpr0DrD l tlr il B s o I t D t3 ...

Page 44: ... 136 137 138 139 140 141 142 Eiect Spring CS Ring CS Ring E Ring 2 E Ring 3 Screw Screw Screw Screw Seme Screw F T Screw F T Screw Scre Seme Screw M2 6x 5l 1M2 6 x 10 M3x 5l M2 6x 8 M2 x 4l 2 6x 6l 3 x 6 1 M 2x 1 1 1 M3x 6l Screw M2 x 5l Spring Washer Washer Letær Knob Knob M041 79210 M04179211 ...

Page 45: ...tion Worm Washer Stop Lwer Lock Plate Spring SelectArm Spring Slede Plate Collar Holder Plate Ass y Assist Gear Spring Start Le rer A Tension Ass y Spring Lock Plate Side Plata Side Plate Flyweel FM Gear Washer SPring Belr Mainl Belr Reetl Belt AS Motor Brâckst Holder Ass y Cassene Case Rec Lever Button Holder Butlon Larer Inter Plate Cam Plate Spring Spring CassetteHolder Springl SW Platc lnter P...

Page 46: ...I x 7 TAPE DECK MECHANISM EXPLODED VIEW EA ô r3o _l lt ffi î u È tZZ o N Éooll T L il b e ii i8l3o r ltrâ o là 135 1 lle 125 19 3 8 ...

Page 47: ...Symbol No Parts No Description 120 121 122 123 124 125 E Ring E Ring E Ring 8E Ring 5 0 1 5 2 4 5 0 ...

Page 48: ...ar Horizontall Washer Spring Lever PCB Ass y Base Spring Ôushion Babber Shaft Pin Custrion Rabber Transistor 1 5 1 6 1 7 1 8 1 9 20 21 22 23 24 25 26 2t 28 29 30 3t 32 o 3 3 34 35 36 37 38 39 40 41 42 43 41 45 46 47 48 49 50 5t 52 53 54 55 56 57 58 59 60 M07602645 M07602646 MO4179625 MO4179131 M07602381 M07602713 MO7556516 M07556655 M 179204 7D0cO4a Holder VÉBZI Holder Ass y Recordl t sp insPr t 4...

Page 49: ...SM EXPLODED VIEW l AlN cHASSls EXPLoDED vtEW f3 Hor_DEre A SSy U497 Èo3 8 j05 o rs t pe Z2O soporcoil 3 06 rh frî ê tF 63 i Jè j 3y Æ lN W li fl ùr l J ffi I r3 lt4 417 91 3l covæJ s y a t toal7992ç coYe t g2 F 35 iff _ ...

Page 50: ...rizontal Pulley Ass y Washer Cushion Rabber Washer Pulley Gear Horizontall Washer Spring Lever PCB Ass y Base Spring Cushion Rabber Shaft Pin Cushion Rabber T16nsistor CoverAss y pt cot Micro Switch Holder BeaningAss y Washer Flywheel Belt Mainl Nut Flange ANT Loop Holder ANT Board Back Holder PCB Holder PC8 ArsI Curhion Flabber Washer Holder Holder Holder Holder Warher Holder Plota Knob Spring Ca...