Service manuals, schematics, eproms for electrical technicians
1-EPU-70C TURNTABLE SCH.
Type: 
(DJVU)
(DJVU)Size
21.6 KB
21.6 KB
Page
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Category
AUDIO
SERVICE MANUAL
AUDIO
SERVICE MANUAL
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Good luck to the repair!
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1EPU-70C TURNTABLE SCH. 1EPU70C EPU 70 70C 1-EPU-70C
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Relevant AUDIO forum topics:
Hi,
I am looking for the service manual "Cambridge Audio Stream Magic6 v1" or the schematic of the power supply.
Thanks in advance
Phil
I am looking for the service manual "Cambridge Audio Stream Magic6 v1" or the schematic of the power supply.
Thanks in advance
Phil
Sziasztok!
A topikban szereplő készülék semmi életjelet nem mutat a Power gombra sem semmire.
A reset-eket megcsináltam a gomb kombinációkkal de semmi. Töltést vesz fel, majd lehúzva az aksipakkról a főpanelra felmegy 7.9V ami jó, mert 7.2V/5000mAh-s akku van benne.
Hálózatra dugva még feljön a főpanelhez egy 22V körüli fesz a táppanelról.
A tulaj aki hozta főként leesést emlegetett, de belül sárból fröccsenéseket is látni.
Mivel kezdjem? Van kapcs rajzom ide fel is töltöm.
JBL PARTYBOX 110 COMPLETE TEARDOWN !!! (youtube.com)
Kösz előre is
A topikban szereplő készülék semmi életjelet nem mutat a Power gombra sem semmire.
A reset-eket megcsináltam a gomb kombinációkkal de semmi. Töltést vesz fel, majd lehúzva az aksipakkról a főpanelra felmegy 7.9V ami jó, mert 7.2V/5000mAh-s akku van benne.
Hálózatra dugva még feljön a főpanelhez egy 22V körüli fesz a táppanelról.
A tulaj aki hozta főként leesést emlegetett, de belül sárból fröccsenéseket is látni.
Mivel kezdjem? Van kapcs rajzom ide fel is töltöm.
JBL PARTYBOX 110 COMPLETE TEARDOWN !!! (youtube.com)
Kösz előre is
Sziasztok Mesterek!
Adott a címben szereplő autórádió (rajz a tanyán). Amikor bedugom a táp(stb.) csatlakozót, 2 másodpercre felvillannak az előlap fényei és megjelenik az "ALL OFF" felirat, majd teljes sötétség és néma csend. Innentől csak a reset gombra reagál. Ha ezt megnyomom, ismét felvillannak a fények, ua. a kiírás, aztán megint csend.
A BackUp +5V megvan, de állandó jelleggel jelen van a PowerOn +5V, és a +8V is. Az én értelmezésemben utóbbi kettőnek csak bekapcsolt állapotban kellene megjönnie. Vagy rosszul gondolom? Mellesleg a BackUp +5V-ot kapcsoló tranyó olyan forró, hogy az ujjam 1mp-nél tovább nem bírja. (De a fesz megvan és stabil.)
Próbáltam másik előlappal is, de azzal is ua. Végső esetben szerzek mégegy ilyen rádiót és összehasonlító méréseket végzek. De ez valszeg csak holnap lesz. Addig is minden ötletet szívesen vennék!
Köszönettel:
Gyula
Hello everyone,
I've this speaker model:
RCF art 415-A.
The power supply is faulty, no votltage out to the amplifier.
The Mosfets are blown. I've changed the mosfets and it's driver, and still have a problem.
I tried to switch on but only one of the mosfets gets hot (the one which switches the 310. There are 2 of them - Mos5 in the scheme).
Obviously I turned it off.
1) What causes it to heat?
2) Testing the VCC of the LMC555, it's only 2.7V. When taking it out of the circuit, it's 12VDC! What makes the voltage to drop. Where does the supply of the LMC555 come from? The VCC of the 555 should be around 10V, as compared with a good card.
I've changed the 555, but the problem remained. I've checked the components around, resistors and capacitors, and transistors, and seem to be OK.
4) The VCC of the Mosfet driver is 10V, but should be 12V if compared with a good card.
3) Could the trafo be damaged? Are these parts reliable or may blow up?
4) What is the purpose of the optocoupler in the circuit?
I would really appreciate any help.
I didn't find the 100% schemes for this RCF (400), but found a very similar one (The 600 version).
name and a link here to download the pdf.
DigiPRO600B
https://elektrotanya.com/db-technologies_digipro600b_sch.pdf/download.html
Regards and many thanks
I've this speaker model:
RCF art 415-A.
The power supply is faulty, no votltage out to the amplifier.
The Mosfets are blown. I've changed the mosfets and it's driver, and still have a problem.
I tried to switch on but only one of the mosfets gets hot (the one which switches the 310. There are 2 of them - Mos5 in the scheme).
Obviously I turned it off.
1) What causes it to heat?
2) Testing the VCC of the LMC555, it's only 2.7V. When taking it out of the circuit, it's 12VDC! What makes the voltage to drop. Where does the supply of the LMC555 come from? The VCC of the 555 should be around 10V, as compared with a good card.
I've changed the 555, but the problem remained. I've checked the components around, resistors and capacitors, and transistors, and seem to be OK.
4) The VCC of the Mosfet driver is 10V, but should be 12V if compared with a good card.
3) Could the trafo be damaged? Are these parts reliable or may blow up?
4) What is the purpose of the optocoupler in the circuit?
I would really appreciate any help.
I didn't find the 100% schemes for this RCF (400), but found a very similar one (The 600 version).
name and a link here to download the pdf.
DigiPRO600B
https://elektrotanya.com/db-technologies_digipro600b_sch.pdf/download.html
Regards and many thanks
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