Akai-HXM44-tape-sm 电路图 维修手册.pdf

AKAT Service manuat | STEREO CASSETTE DECK move. HX-R44 RadioFans.CN 收音机爱 好者资料库 ABBREVIATIONS FOR SERVICE MANUAL MODEL HX-R44 ABBREVATION EXPLANATION AC Alternating Current ADJ ADJustment DC Direct Current FF Fast Forward FLD FLuorescent Display FREQ FREQuency FWD ForWarD GND GrouND IPLS Instant Program Locating System NR Noise Reduction PB Play Back REC RECord REV REVerse REW REWind SENS SENSitivity SW SWitch VR Variable Resistor V. REG Voltage REGulator RadioFans.CN 收音机爱 好者资料库 STEREO CASSETTE DECK wove. HX-R44 SECTION 1 SERVICE MANUAL . 3 SECTION 2. PARTS LIST 2. cccce ceed ceaeieese ees 15 SERVICE MANUAL HX-R44- 1 RadioFans.CN 收音机爱 好者资料库 SAFETY INSTRUCTIONS SAFETY CHECK AFTER SERVICING Confirm the specified insulation resistance between power cord plug prongs and externally exposed parts of the set is greater than 10 Mohms, but for equipment with external antenna terminals (tuner, receiver, etc.) and is intended for or A, specified insulation resistance should be more than 2.2 Mohms (ground terminals, microphone jacks, headphone jacks. line-in-out jacks etc.) PRECAUTIONS DURING SERVICING 1. Parts identified by the A symbol parts are critical for safety. Replace only with parts number specified. 2. In addition to safety, other parts and assemblies are specified for conformance with such regulations as those applying to spurious radiation. These must also be replaced only with specified replacements. Examples: RF converters, tuner units, antenna selector switches, RF cables, noise blocking capacitors, noise blocking filters, etc. 3. Use specified internal wiring. Note especially: 1) Wires covered with PVC tubing 2) Double insulated wires 3) High voltage leads 4. Use specified insulating materials for hazardous live parts. Note especially: 1) Insulation Tape 2) PVC tubing 3) Spacers (Insulating Barriers) 4) Insulation sheets for transistors 5) Plastic screws for fixing microswitch (especially in turntable) 5. When replacing AC primary side components (transformers, power cords, noise blocking capacitors, etc.), wrap ends of wires securely about the terminals before soldering. c c Observe that wires do not contact heat producing parts (heatsinks, oxide metal film resistors, fusible resistors, etc.). Check that replaced wires do not contact sharp edged or pointed parts. Also check areas surrounding repaired locations. Use care that foreign obiects (screws, solder droplets, etc.) do not remain inside the set. VOLTAGE CONVERSION Models for Japan, Canada, USA, Europe, UK and Australia are not equipped with this facility. Each machine is preset at the factory according to destination, but some machines can be set to 110V, 120V, 220V or 240V as required. If VOLTAGE CHANGE is necessary, this can be accomplished as follows: 1. Disconnect AC power cord. 2. Turn the VOLTAGE SELECTOR located on the rear panel with a screwdriver until the correct voltage is indicated. VOLTAGE SELECTOR Screwdriver CYCLE CONVERSION Cycle conversion is not necessary since HX-R44 use a DC motors. SERVICE MANUAL HX-R44 II. TIL. IV. VII. VII. IX. SECTION 1 SERVICE MANUAL TABLE OF CONTENTS SPECIFICATIONS :6 6. -s5s (se) tens, stan Saye bude Ged ude, wR ee AE eS 4 DISMANTLING OF UNIT . 2. ee ee ce ce ee enn 5 CONTROLS 305 oshieie ole oe eee cs Ee oS DS Saw el wee ae 6 PRINCIPAL PARTS LOCATION. 0.0. cee eee eer eens 7 MECHANICAL ADJUSTMENT . 0.0. cc eee cece cee ees 8 5-1 PINCH ROLLER PRESSURE MEASUREMENT . 8 5-2. WINDING TORQUE MEASUREMENT IN EACH MODE . 8 5-3. TAPE SPEED ADJUSTMENT. BE ar orate ie uae Ois nee ictae 8 HEAD ADJUSTMENT . 2. 2c cc ccc ce cee nee tenes 9 6-1 TAPE GUIDE ADJUSTMENT.0 00.02 cee eee eee 10 6-2 REC/PB HEAD AZIMUTH ADJUSTMENT . 10 6-3 HEAD HEIGHT ADJUSTMENT . 0.00200 000. 10 6-4 HEAD BLOCK PROJECTION ADJUSTMENT . 10 ELECTRICAL ADJUSTMENT. . 0.0. 2c eee eee eee 11 7-1 QUICK REVERSE SENSITIVITY ADJUSTMENT. 11 7-2. PRE-AMP P.C BOARD ADJUSTMENT .05. 12 DC RESISTANCE OF HEADS . 0.0.0. ccc cee eee 14 P.C BOARD TITLES AND IDENTIFICATION NUMBERS . 14 For basic adjustments, measuring methods, and operating principles, refer to GENERAL TECHNICAL MANUAL. SERVICE MANUAL HX-R44 I. SPECIFICATIONS TRACK SYSTEM 4 Track 2 channel stereo system TAPE Philips type cassette HEADS Erase head x 1 HD head for REC/PB x 1 MOTORS Electronically speed controlled DC motor for capstan drive x 1, DC motor for cam drive x 1 WOW | | | zleov ies 1 * ta Oa 0) : 4 Lb swo0e et 7 iis re Rung Cho 6 EvecT aavlion ye lov nev Q Fes ae Tram OOOSIOOD athe : | pt PELE ais hl a J: ino ees Dh E-B IAB OC) 1? ; CAM MOTOR Laon i Bee be “98 lol PULSE PCB : e i OrOrg PSI tcmroicisac AS Stor Arzos <t206 8 NTE G50 eae i Or | bee Feta Il I va el EI owe Steen 1 SSTRIY tase 17-07 29 (A) Sra om Io! tlie) Tprssoil_ DETECTOR (A) L_. CMROIDI290 Nos ata TR3 2SANIS(E,F) ioe Sey be al cr vo eer Py 1 Top meral | 1 Yep pen nes porarion IO Dh E99 y a7 | TRS 2SA1348 mS BS) LA HOME 7 | iene woe rm ; ony ON ( av fp nae | a nen ee i CMROICI89B Ino Sonar ome Bae wales a)3 TRS ai3a6 | ! | f | = aon H Yo AF Var Bi | |REEL ROTATION PCB cS 330/25 1 23 24) CoP 3aS ur aay | a rr 2 zl 3, TO PRE AMP PCB TIIO POWER SUPPLY PCB TRE 2SAIII5(E,F) be 182473 wal 8 ATL Ava BAR SYSTEM CONTROL T2O060A501IA Fa FROM PREAMP Pr FROM PRE AMP P2 ac24ov Sonz * EJ F 1 | Ac3omazsov | A 63omaizsv | A T500ma F 2 Assomazsov | A e30maizsv_| A T500ma 3 Asoomazsov | A Soomarzsv | A T400ma Tz060e TR7 2SAI348 T214 O pares | | PHI, SP1-201 1307, ih <a ( D DIRECTION! ( 1308 Sw901 | fwosnev Oy FWD/REV| eas ae | Pt | ee awe nec ewo_ ira OHS I-F Ay FBR col It | i! |ewooe ANT | LEAF SWITCH ANTI_REC_REV f | RECREV) 11 1Or Or Or ae | itt 1 | Iovaoe_ EGE 1 CMROICI49O Top OQ OHO I oO imal | To! ! WAR FAF D9 BAB GUIDE DETECTOR tnoo, | 1PCB 1cmRoip0220 M901 CAM MOTOR RO-180S i O (M) iron moron vol ren ND 7 ER (22) j HOUSING PCB aa 8) 1 CMROIDI430 ER POHSHABR REPBEBATH, SROMG HEBRLEBLEOIE. WARNING: AINDICATES SAFETY CRITICAL COMPONENTS. FOR CONTINUED SAFETY, REPLACE SAFETY CRITICAL COMPONENTS ONLY WITH MANUFACTURERS RECOMMENDED PARTS. AVERTISSEMENT: A. IL INDIQU LES COMPOSANTS CRITIQUES DE SURETE, POUR MAINTENIR LE DEGRE DE SECURITE OE UARPAREL NE REMPLACER IES COMPOSANTS OONT LE FONCTIONNEMENT EST CRITIQUE POUR LA SECURITE QUE PAR DES PIECES RECOMMANDEES PAR LE FABRICANT murenirsnemenen = B (POWER SUPPLY) LINE : 8% momen = REC SIGNAL LINE : $ RSH : 9 ve tri0 ( 81 ee eoeeovesoco|. 1) 12.13 14.15 6 17 18 1920 cit s eeoeoeeeee ee Paar tae CR2 dog R28 a TR12 a 1208 Oe Ba N Getedcgh? Shogo Me ol o-* 76m5 43 2 | A jee eeoee To SYSTEM CONTROL, TRI ele 7R3i, R27 -0 0 % 3 To CONTROL (Pee oe tS eye o | 7| PCBJ2 ToMETER iy e|TRI4 PCB T2l4 - 548s qo19 2 ee wo 12345 -, 210. TPI 1208 .0 0 6 OG seese “ye ose OO 123 *% SYSTEM CONTROL PCB T2060A50IA VATA IY bA/LER To SYSTEM CONTROL To POWE! PCB T2l2 r23 456123 CRE fe cece eieceece o | F< o 2 Py rad wu t 6 7 = es Ni me = nz 0 = x an : : Oe ae : : : crarerenait : 2SD1012(G,H) 2SC2320(E,F) 2SCI3I2S(F,G) 2$U74(P,Q) pet oe iets wae Sabie set eee a me a | Bw ai z a Lt 28C2603(E ,F) 2SC2274K(E,F ) : ao areata ; : : : : ; : ) 2SAIIS(E,F) 2SC1843(E,F) LOCATION OF COMPONENTS IC oe bs y i e OF To SYSTEM! wig * ; : ras sh : ane CONTROL: DRI 2s. sieve eaee-ee C3 PS ciiierseuce she S A3 TR9,9b,10,10b.D5 oe ee Ata, ss TRILEOL3 2 tecace 45. cS TR11btol3b. c4 TR14tol6. BS TRIB oid ea tiee .-B4 PRLY sie Ris eases iene -A4 TR20 0. ee ee eee ee AS TR Dis te. guia dicey a Zeta ave 0 BS TR22. we afereters Bl TR23 hive basa ed Al to BS TRAIe see ees tee THOT cs taticecer ware E3 to B4 TR2SDs ty patties Ey TOS eens Gaal ne C2 to B4 TR26,27.0seeees D2 TR26b, 27b. D1 TR2 B50 See ieete ttle, C2 TR29 esos die: ceke 5 E2 TR30,30b. E4 TR31 31D.) e-e2te es D4 TR Ito 4, 8tol3_ INPUT TROD re ard tars aus Sears B4 TR 7 ,25,28- 28C2320(E F) TR5 - 2SD794(P,Q) TR6- 2SD1012(G,H) TRI4, 20, 21 - 28C2274K (E,F) TR2B, 23, 29, 3227 2862603 (E,F) TR26 2SC1843(E,F) EM AOMANABAG. RELERBATT TROMG HEBRUAAEALEOIE TR27 - 28C1312S (F,G) WARNING. INDICATES SAFETY CRITICAL COMPONENTS. TR30, 31 2SAI115 (E,F) od, ve el i eine spy : J 4 t . y a er ik . : ms , FOR CONTINUED SAFETY, REPLACE SAFETY CRITICAL COMPONENTS eet al Sey Ar ee aa aay a : HE “ aah a ek nf ces is ae 0 oar eot % ca cae ae Pe Ses fe : ONLY WITH MANUFACTURERS RECOMMENDED PARTS. Pca. | we a : Can Min i 8 ie ite ee 1 =) my Terk AVERTISSEMENT HINDU LES COMPOSANTS CRITIQUES OE SURETE POUR MAINTENIA LE DEGRE DC SECURIE : : : b OE APPAREL NE REMPLACER 1S COMPOSANTS ONT LE FONCTIONNEMENT ESI CRIIQGE POUR LA SECURE UE PAR OES PIECES RECOMMANOEES PAR It FABRICANT i ERASE REC/PB f HEAD HEAD | ! 10 Fal 1 j Zone JACK PCB T2045A501B Ley 7 BR TEFL TIER FLEXIBLE PCB CMROIA0020 LEFT BIAS PRE-AMP PCB T2045A50IA to PRE AMP T) PrTRiR ISO Oe rere ON es er ae On a ee Sore : e be up_ = RI - p PBOFF 8 | 7 O RECON a y oder PB Pege 315Ilz (AT-750773) 333Hz (AT750773) oder oder od 315ilz (AT-750773) =55 0. 20 Bin Frequenzgang itm NormalLeercassette| |. UkHz, LOkIz p VR7 : Normalposition |ikllz,1OkIlz -25,5dBm REC/PB Linear + 0,3dB Frequenzgang CrO,Leercassette : 4 | ikilz, 1OkIlz Ikliz, LOkHz25, 5d Bm REC/PB VR3 Linear + 0,8dB Ergebnis Bemerkungen =6,1 20, 2dia oder =5,5 20, 24m $6.1 0:30am PB Pegel 7 Reineisenband- Frequenzgang Leercassette dkliz, LOkHz Reineisenband- 1kilz, 10kliz iAneat 2 0.8dRm Position -25,5dBn Normal band- Leercassette Ikliz, -5,5dBn REC Pegel REC/PB | vRL | -5,510,5dBm Vormagnet : : ae r F we ussteuerungsrepler isierungs- ; - : , filter e nets eagvalev neat Minimumausgang|. Maximum stellen Zu diesem Zeitpunkt den Line Ausgang- spegel um 0,1dB senken und Prufen, daB die Ova Anzeige erlischt. Ovu Anzeige bei Line Ausgang -5,9 0, 20Bu Anzeige empfindlichkeit Ikilz Eingang MPX-Filterschalter On Minimumausgang HINWEIS: 1. Alle obigen Einstellungen auBer fur Schritt 5, 10 und 12 gelten fur die FWb- Betriebsart; diese Einstellungen sind im REVBetrieb nicht erforderlich, ader die Prufung jedes Schritts in der REV-Betriebsart sollte ausgefuhrt werden. 2. Obiger Abgleich, auBer fur Schritt 12, unr mit ausgeschalteter DolbyRausch- unterdruckung ausfuhren. 3. Zum Adgleich nur folgende Bander verwenden: Normalband: Maxell UD C-60 CrO, Band: TDK SA C-60 Reineisenband: TDK MA C-60 4, Fur weitere Einstellungen siehe Abbildung 7-3,