Service manuals, schematics, eproms for electrical technicians
MURPHY TU 298 [SCH].
Type: 
(DJVU)
(DJVU)Size
265.7 KB
265.7 KB
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1
Category
AUDIO
SERVICE MANUAL
AUDIO
SERVICE MANUAL
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MURPHY TU 298 [SCH].
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Tisztelt kollégák!
Javított már valaki ilyet? Kicseréltem benne a lézert,azóta semmit sem hajlandó beolvasni. A szervoáramkör beállítására nem találok procedurát, trimmerpoti nincs...
Sziasztok!
Egy Philips 70FR330/00g készülék magnó egysége (FC330) állandóan felvételen van. Ez egy kétkazettás deck, és az egyik fele kifogástalanul megy oda-vissza, a másik (B magnó) szintén hibátlanul csévél, de lejátszáskor csak fölvesz. Pontosabban: bekapcsoláskor a törlőoszcillátor azonnal elindul még akkor is, ha nincs lejátszásra kapcsolva, és töröl mindent.
Volna valakinek ötlete?
Köszönettel:
Attila
Egy Philips 70FR330/00g készülék magnó egysége (FC330) állandóan felvételen van. Ez egy kétkazettás deck, és az egyik fele kifogástalanul megy oda-vissza, a másik (B magnó) szintén hibátlanul csévél, de lejátszáskor csak fölvesz. Pontosabban: bekapcsoláskor a törlőoszcillátor azonnal elindul még akkor is, ha nincs lejátszásra kapcsolva, és töröl mindent.
Volna valakinek ötlete?
Köszönettel:
Attila
I have and found most of the voltages as indicated on the circuit diagram, till op amp M 5218P; are near those specifed. The output on the centre of the two power transistors of both the channels are also alright.
While looking at the voltages on test points as mentioned on the page 7 for setting up quiscent current, these cannot be set.
Bit of history, the amplifier was lying unused for long time. Nothing in it has burnt. It was never opened earlier than this time, couple of days back.
While looking at the voltages on test points as mentioned on the page 7 for setting up quiscent current, these cannot be set.
Bit of history, the amplifier was lying unused for long time. Nothing in it has burnt. It was never opened earlier than this time, couple of days back.
While I was probing for voltages with DMM, with probe on collector of TR413 one of the fuses blew up. Later same thing happened on the other channel as well.
With the above as background can a Good Samaritan figure out feasibility of repair.
i am unable to upload service manual as file size is 7.3 mb
Üdvözlet!
Dynacord L1600-os végfok gyári (szervizkönyvi) nyugalmi áram értékét szeretném megtudni,VR1,VR2 trimmer kontakt hibája miatt.(közel 30 éves a cucc)A CNSERV 2,3 és 5,6 pontokon beállítandó mV-értéket.A rajzot megtaláltam a tanyán.
Köszönöm a segítséget!
Dynacord L1600-os végfok gyári (szervizkönyvi) nyugalmi áram értékét szeretném megtudni,VR1,VR2 trimmer kontakt hibája miatt.(közel 30 éves a cucc)A CNSERV 2,3 és 5,6 pontokon beállítandó mV-értéket.A rajzot megtaláltam a tanyán.
Köszönöm a segítséget!
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