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GAMBLE-SKOGMO, INC. C671 SCH

AUDIO - SERVICE MANUAL
Type: (PDF)
Size
191.2 KB
Page
4
Category
AUDIO
SERVICE MANUAL
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  • Also known:
    INC. C-671 C671 671 GAMBLE SKOGMO
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
Sony FH-B490 CD rész nem működik(megoldva)
üdv: a CD része no disc-et mutat. A motor és lézer meg sem moccan. A tálca működik. A spindle motor 3V -ról szépen pörög, szán is normálisan megy 3V-ról, tálca szintén . Kapcsolók jók. Összedugva nem tudok semmit mérni, nagyon rövidek a vezetékek. +5V és +7V elmegy az egység felé. A tanyán levő rajzból hiányzik a CD egység rajza A robbantott ábrán CDM 28-58D10D van írva, a panelen HCMK-P3X, az IC-k BA6297AFP és CXD 2515AQ. Ráadásul KSS240 optikával. Valakinek ötlete vagy a hiányzó rajza lenne? Bálint
Thomson DPL-580HT Készülék néma , sötét a kijelző is.
Üdvözletem Tisztelt Mesterek! Tanácsot , segítséget kérnék. Az említett Thomson DPL-580HT géppel bajlódok. Hálózatra csatlakoztatva a készenléti led világít, kapcsolót nyomva indul, feszültségek megközelítőleg jók. Kikapcsolni nem lehet , csak kihúzni , de ismét indul. Kijelző egység tápja , feszültségei magasak. Pl:IC-103 stab. be és kimenetén azonos feszültség (5V) mérhető,a kisütő ellenállás miatt , tehát az IC-101 Microcontroller (HT48R05A-1) nem megy. A meghajtón Q102 (PT6315)-n is magasabb feszültség mérhető, 24V helyett,31V. Kérnék segítséget a tovább lépéshez. Valakinek van bontott gépe? Érdemes tovább bajlódni vele? Rajz a Tanyán van, kijelző részt nem tudtam úgy kicsinyíteni hogy a topikba mellékeljem. Előre köszönve a segítséget: Öreg Tom
NAD 3140 amplifier - power transistors getting hot
This one had been sitting in a barn for years. Powered it up and the large power transistors on the heat sink would get hot
after a time....and the heat sink would also get quite hot. Speakers sounded like they had some DC on them....with a loud thump

Found the manual on Hi-Fi engine,
http://www.mediafire.com/file/b8mlsu7q3pz0bvf/hfe_nad_3140_service.pdf/file ]
and saw a video on youtube saying lots of capacitors dry out
due to their locations near resistors that get very hot, I guess sorta a poor
design. Went in and recapped almost the entire
product save for the (4) large 50V PS caps which appear to check ok.None of
the high power or driver transistors
mounted to the main heat sink were shorted..

Powered on but no audio, and noticed the fuses to Bridge D805 were melted open.
I believe they were ok before.
Replaced them and they started to light up like fiilaments, so shut down,
removed the bridge D805, then checked it, its ok.

There is about a 16 ohm short on the + / - lands where the bridge was. It
seems like something I did maybe is causing this,
like a capacitor in backwards, which I am doing alot of lately for some
reason.

Turns out, yep I put C805 (470/ 63) In backwards ! Capacitor still checks
ok, so will re-use it.

Short is still there though Im guessing R803 is adding in 5.6 ohms or so,
that means theres a 10 ohm short someplace. Q801, 802 arent reading short,
and looks like this becomes a +43V ps feed.

Any ideas out there on what to check next? I am guessing this cap in
backwards caused the voltage applied to a component to be
reverse and its shorted. Or would this be normal with a reversed cap installed,
and putting it in right would be how to fix it?

Steve Hearns
Technotronic Dimensions [USA]
WWW.TECHNOTRONIC-DIMENSIONS.COM
 
Mp3 szoftver keresés
Kérem aki tud segitsen! Vettem több darab mp3-fub 35-öt. A gyári cd vel nemcsinál semmit a szoftverét kéne frisiteni.szétkaptam 1 mp3-ast (sigmatel stfm 1000 proci vanbenne.Ehez hol lehet találni szovtvertamivel meglehet csinálni a firmware frissitést?Elöre is köszönöma segitséget.üdv Csaba
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