Hitachi HA-3800 Service Manual Download Page 1 | Manualshive

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Summary of Contents for HA-3800

Page 1: ...vel TAPE REC OUT 35 watts per channel min RMS at 8 ohms from 20 Hz to 20 kHz with no more than 0 05 total hormonic distortion 35W ch 35W ch 8 0hms 1 kHz T H D 0 05 35W ch 35W ch 4 ohms 1 kHz T H D 0 05 10 Hz 30 kHz 8 ohms l12Rated T H D 0 1 20 Hz 70 kHz 0 5 3 0 dB RIAA O sdB Less than 0 05 Les than 0 05 Less than 0 05o o 2 5 mY 47 k ohms 150 mV 40 k ohms 150 mV zl0 k ohms 150 mV Phono overload lev...

Page 2: ...tkreis hoher Linearitdt fiir geringste Schaltverzerrungen 2 Entzerrungsschaltung mit hoher Empfindlichkeit und groBem Fremd spannungsabstand CARACTER ISTI OU ES TECH N I OU ES Puissance de sortie 35 W can 35 W can deux canaux en fonction sous 8 Ohms 20 20 000 Hz D H T 0 05 35 W can 35 W can 8 ohms 1 kHz D H T 0 05 35 W can 35 W can 4 ohms 1 kHz D H T 0 05 l 10 Hz 30 kHz 8 ohms 1 2 de 0 1 ol 20 Hz ...

Page 3: ...ment nicht die Teile in Carefully adjust idle current etc using an adjusting screwdriver insulated with tape etc 2 Care has been taken in use of such parts as using fuse resistors floating installation etc to improve safety Be sure to use specified parts when replac ing parts and install in the original condition 3 If a measuring instrument with low impedance such as the tester is used when measur...

Page 4: ... t DESCRIPTION OF THE NEW CIRCUIT o Super linear circuit Fie 2 is the block diagram of the B class amplifier In the B class amplifier transistors Q3 Q4 are switched ON and OFF according to the input signal to apply current to the load RL Q3 is ON and Q4 is OFF when the input signal is positive and they operate in reverse when the input signal is negative Idle current is applied to minimize distort...

Page 5: ...tung und der Anzahl der aufleuchtenden LEDs bei Verwendung von Lautsprecherboxen mit einer Impedanz von 8 Ohm ist in Abb 4 dargestellt NOUVEAU CIRCUIT tion variable est employ6 pur ajuster automatique ment la tension de polarisation pour que le transistor Q4 ne soit pas commut6 sur arr t lorsque le transistor Q3 est commut6 sur marche Ceci permet de r6duire les distorsions de commutation Ce circui...

Page 6: ...o output appears at the speaker terminals even if the lead wire used for short circuiting is removed Next turn off the power switch and after approx l0 sec turn the power switch on again When output comes out of the speaker terminals this indicates that the ASO detection circuit is operating normally Fig 5 2 v o Phenomena and remedies when the protection circuit operates Protection circuit operate...

Page 7: ... der Klemmen verwendete Draht entfernt wird Danach den Netzschalter abschalten und nach etwa l0 Sekunden wieder einschalten Wenn nun ein Ausgangs signal an den Lautsprecherklemmen festgestellt rvird bedeutet dies daB die ASO Schutzschaltung richtig aubeitet o Ursache und Abhilfe bei Ansprechen der Schutzschaltung Abb 5 Schutzschaltung spricht an Den Netzschalter abschalten und den Lautstdrkeregler...

Page 8: ... la sortie parvient aux bornes de haut parleur c est le signe que le circuit de d6tection de type ASO fonctionne normalement We v v o Ph6nomdne et remddes quand le circuit de protection fonctionne Voltmetre a Couurant Osctllo ope alternattf Fig 5 Placer l interrupteur 96n6ral en position OFF et le potentio mdtre de volume en position MIN Ne disparait pas Placer l interrupteur g6n6ral en position O...

Page 9: ... l ro rl _sl ON 5e Reot I lO fu6a ACr Axial lead cylindrical ceramic capacitor Zylindrischer Keramikkondensator mit axialer suleitung Condensateur c6ramique cylindrique d conilucteur axial 3 O 8 4lmv 22 3 Rcn Same as Lch lsoP o J o trl se R4 L 330 R4ilR 330 Rch Same as Lch R412R 330 c7t6 t too 3 llr z sA I i t 2 5 6 24Ov 3 6 7 22OV 3 4 7 E t OV 6OHz 9 ...

Page 10: ...PHONO o7 l R 2SCr740L N GI702 L R 25C2259 o703L R 2SB7 r 6 o704 L R 2SB7r5 Gl7 5 L R 2S0756 o706t R 2Sc2389 o7 8 t R 2SC2389 GI820 2 SD330AL R742L 2 2K Q8 r 2sBDFAL o8 2 2SB514AL oEo3 2SArOr5 Q9 l 2 SA r038 R820 330 t 2Wl 2 z 2 Y J9 sl NN ON D952 L IK34A c95r L t 50 R95I L il I tc90r HAt2002 The circuit rymbol ll I means a fuss resistor Whon replacing it with new one rofor to the CAUTION on page 1...

Page 11: ...RD PRINTPLATTEN B Earth Axial lead cylindrical ceramic capacitor zylindrischer Keramikkondensator mit axialer suleitung condensateur c6ramique cylindrique dr conducteur axial PLAN DE BASE Other l 7 LOUONESS SUBSONIC FIL ...

Page 12: ...tz n Vergewissern Sie sich daB die richtige Type gewahft ist ATTENTION L6s resistance a fusible sont fahes pour afteliorer la s6curit6 de l appareil protection de circuit pour les remplacer utiliser le meme type Utiliser toujours le modale de tusible specifie pour effectuer le remplacement M5214t IS2473 1S20764 RD24EB1 RD4 7EN3 RD8 2EN ft i t n T sTK8250 IK34A G 25C17401N 2S8715 2SD756 2SC2389 2SA...

Page 13: ...UX _ REC TAPE Lplay ACl20V 60Hz 220v 50 60H2 240V 50 60H2 120v 220v 240V 50 6OHz Power sw Tone control Power ind Program Source ind Marn amp Br L Equahzer amp B Equalizer Amp B Main amp Bz q 4 q UNSWITCHED IOOW MAX for U S A Canada Asia Latin AnrerOa SWITCHED IOOW MAX for U S A Canada One channel only shown T il ...

Page 14: ...topping x 2 PUSH The switch may be damaged when the knob is pulled with the switch locked Be sure to release locking before pulling out the knob Der Schalter kbnnte beschiidigt werden wenn der Knopf bei ver riegeltem Schalter gezogen wird Unbedingt die Verriegelung freigeben bevor am Knopf gezogen wird Le commutateur risque d 6tre endommag6 si le bouton est tirA lorsque le commutateur est en posit...

Page 15: ...oving the printed wiring boards power transistors o Ausbau der Leitterplatten Leistungstransistoren o D6poser des plaquettes a circuit imprimd transistors de puissance 3lx6DT x2 sprSDT x4 3Px20bind x 5 A 3r x lObind topping x4 t3 ...

Page 16: ...0v 50v 50v 50v 50v 25V 25V 50v 50v 50v 50v 50v l6v 50v 50v 50v 50v 50v 50v 50v 50v 50v l6v l00v l6v 50v l6v 50v 50v 50v 50v l6v 500v 50v 50v 50v 25V 25V l6v 25V 50v 6 3V l6v 50v 25V l6v SYMBOL No PART No DESCRIPTION A c95lLR c952LR acl acl 02528ttK 0252805K 0243899 0243901 Electrolytic Electrolytic Ceramic discal Ceramic discal rpF I sov o 47uF lsov I 0 0lpF to 90 l25V for U S A Canada 0 0lpF to 9...

Page 17: ...8 o DI ODES THERMISTER DTOILR D702LR 233760t 233760t 1s2473 ts2473 SYMBOL No PART No DESCRIPTION D7O5LR D706LR D80l D802 D803 D804 D95ILR D952LR zD80t 2D802 ZD8O3 2D820 ZD95ILR THTOILR 2337ffiI 2336t5t 2337341 2337762 2337762 2337ffit 2337922 2337922 2338647 23386 7 233859s 2338613 2338589 23471t4 ts2473 ls2076A 55VB2O ERBI2 01 ERBI2 01 rs2473 IK34A IK34A RD24EBI RD24EBI RD4 7EN3 RD8 2EN3 RD3 9EN2...

Page 18: ...39284tt 393229r 394296t 224753t 2U7532 2247533 23690rr 2767628 4567422 45674t3 4567454 45674tt 4784t06 4s67432 458t982 4567417 a SYMBOL No PART No DESCRIPTION A A A A A A A A A A for R 26s Ril I 2727ts31 EAR PLATE ASSEMBLY Bushing for U S A Canada Bushing except U S A Canada Power supply cord for U S A Canada Power supply cord except U S A Canada U K Australia Power supply cord for U K Power suppl...

Page 19: ...e Eingangsbuchsen AUX INPUT Tonband Aufnahmebuchsen TAPE REC Tonband Wiedergabebuchsen TAPE PLAY Lautsprecher A nschluBklemmen SPEAKERS Kaltgerbtdstecker 3 firr USA und Kanada 1 fi rr Asien und Lateinamerika Netzkabel S pannungs Wahlschalter VOLTAGE SELECTOR FUR Asien und Lateinamerika Sicherungschalter FUSE Fi lr Asien und Lateinamerika lnterrupteur d alimentation POWER Prise de casque d 6coute P...

Page 20: ...Hayes Middlesex U83 4DR England Tel 01 W 8787 Service Centre 01 848 3551 HITACHI SALES SCANDINAVIA AB Rissneleden 8 Sundbyberg Box 7138 3 172 07 Sundbyberg 7 Sweden Tel 08 98 52 80 HITACHI SALES NORWAY A S Oerebekk 1620 Gressvik P O Box 46 N 1601 Fredrikstad Norway f el 032 28050 SUOMEN HITACHI OY Box 151 SF 15100 Lahti 10 Finland Tel Lahti 4 241 HITACHI SALES A S Kuldyssen 13 DK 2630 Taastrup Den...

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