Service manuals, schematics, eproms for electrical technicians
AUDIO POWER AMPLIFIER BP4078 CLASS-D
Type: 
(RAR)
(RAR)Size
1.5 MB
1.5 MB
Page
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Category
AUDIO
SERVICE MANUAL
AUDIO
SERVICE MANUAL
If you get stuck in repairing a defective appliance download this repair information for help. See below.
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Looking for similar audio manual?
Good luck to the repair!
Please do not offer the downloaded file for sell only use it for personal usage!
Looking for similar audio manual?
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AUDIO POWER AMPLIFIER BP-4078 BP4078 CLASSD BP 4078 CLASS CLASS-D
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Szervusztok!
A fenti discós CD-lejátszót azzal hozták be, hogy "begerjedt", aztán nem működött a kimenet (balanced). Szétszedve az alsó fém borítón fél tenyérnyi korom, a a panelen felrobbant tranzisztor, elégett fólia, SMD ell-k. Erősen kétlem, hogy csak "begerjedt", szerintem valami nagy feszültség került rá valahogyan. Maga a CD lejátszó (mindkettő) kifogástalanul működik. A szemmel látható, és hidegen mérhető alkatrészeket kicseréltem, de most már rajz kellene hozzá. ha valakinek volna, megköszönném. A SM keresőbe is föltettem, de a sok kidobott rajz egyike sem illett hozzá. Ha esetleg tudna valaki segíteni, azt megköszönném. Képek mellékelve.
Üdvözlettel:
Attila
A fenti discós CD-lejátszót azzal hozták be, hogy "begerjedt", aztán nem működött a kimenet (balanced). Szétszedve az alsó fém borítón fél tenyérnyi korom, a a panelen felrobbant tranzisztor, elégett fólia, SMD ell-k. Erősen kétlem, hogy csak "begerjedt", szerintem valami nagy feszültség került rá valahogyan. Maga a CD lejátszó (mindkettő) kifogástalanul működik. A szemmel látható, és hidegen mérhető alkatrészeket kicseréltem, de most már rajz kellene hozzá. ha valakinek volna, megköszönném. A SM keresőbe is föltettem, de a sok kidobott rajz egyike sem illett hozzá. Ha esetleg tudna valaki segíteni, azt megköszönném. Képek mellékelve.
Üdvözlettel:
Attila
:help: udv. mindenkinek: valaki ki tudna e segiteni egy pnh300 tap rajzal
elore is koszonom.
Sziasztok!
Van ez a fenti dragabb fajta erosito (10e euro !)-igen jol olvastatok :villa: A-osztalyu erosito 2x50W.
Forgo potenciometere az a vegtelen reedreles.tehat az nem hibazhat.
A hiba ugy 10perc mulva jelentkezik amikor bemelegszik de csak a bal oldalon:
pl mondjuk all 3 as erossegnel, felerositve 4-esre akkor lehalkul felire,5-nel visszajon 3-as szintre,6-oson, ismet lehalkul, majd 7-esen beall 7-re ahogy kell, nagyobb fokozatoknal mar jo.
Tehat ilyen ugrasok jonnek lepteteskor.
Javitanom helyszinen kell majd par nap mulva mert az erosito 63kg.
A vegerositon csak 4db elko van 470uF/100V a tobbi mind minoseges WIMA blokk kondi.
Talalkozott mar valaki ilyen hibakkal erositoknel?
Hi all !
I plug the plug into the socket. The blue standby LED lights up. I press the standby button. But the amplifier does not turn on, the LCD display does not light up. When you press the standby button again from the 15th to the 20th time, sometimes it is possible to turn on the amplifier. Previously, a similar thing happened after a long period of inactivity of the amplifier unplugged from the outlet. But after turning it on to the outlet and warming up in standby mode, everything seemed to return to normal, and the amplifier was turned on with the standby button the first time.
And now, after standing for 3-4 weeks (unplugged from the outlet), only from the 15th or 20th time.
Thanks.
I plug the plug into the socket. The blue standby LED lights up. I press the standby button. But the amplifier does not turn on, the LCD display does not light up. When you press the standby button again from the 15th to the 20th time, sometimes it is possible to turn on the amplifier. Previously, a similar thing happened after a long period of inactivity of the amplifier unplugged from the outlet. But after turning it on to the outlet and warming up in standby mode, everything seemed to return to normal, and the amplifier was turned on with the standby button the first time.
And now, after standing for 3-4 weeks (unplugged from the outlet), only from the 15th or 20th time.
Thanks.
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