Service manuals, schematics, eproms for electrical technicians

BOGEN DB15 G COMBO AMPLIFIER SCH

AUDIO - SERVICE MANUAL
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SERVICE MANUAL
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    BOGEN DB-15 COMBO AMPLIFIER DB15 DB 15
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
May be useful - Harman Kardon information
For your information to repair Harman KArdon HD710 Player uses a KSS210B Pickup (as spare, original unknown) can be changed without any other servicing Harman Kardon Receivers; Series AVR 2000,3000... "Looses memory issue"- gold cap at the front pcb defective. May be changed to a 1µ cap but you have to solder 3 other elko´s to the other side. Keeps memory for a longer time. "Hum noise for the first 5min, warm up" - right lower side at the main pcb: elko 7800µ dead- you can see it at the "cap of it". Replace both (7800µ and 2200µ) to new versions above 25V. "Fuse burnt voltage selection; no green led´s flash, no sound"- cap 2200µ make a short circuit (next to 7800µ). Change these elkos! If you want to make it better... change the 7x 10µ caps for the regulators too. Resolder all points there. "volume changes self to max. or min." change the two resistors at the front pcb close to the volume encounter. be sure that there are both sides 5V! "everything is functional but no sound; but sound from the 6.1ch in" TC9273N-07 is dead (shorted). Have a look at the two caps and the security resistors beneath this chip! My be dead too. Replace this chip only by the -007 version. others will not function. Be careful with the bigger stripe cable! the contact lines are loosen from the plastics. You can help yourself with a "second glue" under these contacts. So i hope i can help you... cheers SG.
Denon DRA385RD radios erositoben a vedelmi rele random meghuz/elenged
Sziasztok mindenkinek.
A cimben emlitett radios erositovel bibelodok. A vedelmi rele veletlenszeruen meghuz/elenged. Nem hiaba, a kimeneten a feszultseg ossze-vissza valtozik, es amikor 0v korul van, a rele meghuz, aztan 1-2mp mulva elenged. Rovidzarat sehol nem mertem, kinomban mar az smd tokozasu eloerositot is kicsereltem (BA15218), de semmi valtozas. A tapfeszek stabilak. Nem tudom elkepzelni, hogy mi okozhatja a kimeneten a feszultseg allando valtozasat. Ha van valakinek erre otlete, kerem ossza meg velem. Koszonom. Udv.
JVC KD-S641
Sziasztok! Ennek a gépnek az a hibája, hogy nem veszi be a lemezt, a mechanikát már átnéztem, de nem találtam problémát. Ha benne marad a lemez, áram alá helyezve kiadja azt, de be már nem. Külső táppal meghajtva a motort beviszi, és ki is adja a lemezt. A meghajtó icénél mértem 5V-ot, és 3V-ot, de mit kellene még ellenőrizni?
Samsung MAX-N25 hifin nem működik a hangerő szabályozás.
Sziasztok! Nevezett készülék tápegység rész hibával került hozzám. Ezt megjavítva már minden működik, kivéve a hangerő szabályozás. Gyakorlatilag nem is reagál rá. Úgyértem, szabályozáskor meg kellene jelennie (számokkal jelezve) a hangerő nagyságának, de ez sem történik meg. Encoder működik és küldi az inpulzusokat a procinak. Elképzelhető, hogy csak ez a része ment volna tönkre a processzornak??? Köszönettel: Kiss Z.
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