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Old 12th December 2011, 11:32 AM   #1
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Default Sansui AU555

Dear Friends,

I am trying to fix a Sansui AU555 amp with a power supply problem. I realised the filter capacitor has shorted. The value is 2000UF, 60V. I cant get this capacitor off hand. I have a new capacitor with value 4700UF, 63V. Is it OK and safe to replace with this capacitor. Pls advice.

Thanks

Carlosraj
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Old 12th December 2011, 02:44 PM   #2
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this is going to be absolutely fine to do and if you want you may as well go up to 10.000 mfd /63v

problem though is that in this particular amplifier and especially at this age all capacitors need to be replaced no questions asked and all means all ....

if you want to keep this amp up and running there is no other possible way to do it ....

Kind regards
Sakis
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SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
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Old 13th December 2011, 10:07 AM   #3
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Thanks Sakis
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Old 13th December 2011, 12:33 PM   #4
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if you need a schematic feel free to email me
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SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
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Old 26th March 2012, 10:16 AM   #5
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You can get schematic and service manual...

AK Database PDF Gallery - Sansui/Sansui AU-555 Schematic
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Old 6th February 2014, 12:11 AM   #6
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any one know what is the similar of transistor cdc9002-1,for sansui au555?
thx
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Old 8th February 2014, 12:19 AM   #7
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I only know what I have read and collated from others off another forum.

someone said:
"I used modern equivalents....
8002=MJE 340
9002=MJE 350"

another person once said,

"So I'll sum up the changes as such:
XA495 > ZTX795A (PNP)
(CDC)8002-1 > ZTX694B
(CDC)9002-1 > ZTX795A "

I think I bought some ztx795a's
I havent tried these out yet. But I see no reason why they woundn't work.

try typing into google: sansui cdc9002
It doesnt matter if the discussions arent related to the amp you have (generally correct), but relate to the transistor you are talking about
goodluck
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Old 8th February 2014, 07:21 AM   #8
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Any E-line GP amplifier (which means the ZTX family from Diodes Inc) will work as a driver, for example those used in 30W Naim Nait and NAP90 models. They used the common and really tough ZTX 653/753 types, rated up to 2A.

MJE340/350 or BD139/140, will work and run cooler but the Ft of substitutes will all be different and affect sound quality to some degree.

Personally, I would look to those Japanes drivers in large TO92 style cases like 2SC2235/A965 which have a good track record in small power amps. They certainly won't perform like the originals but worth a trial at least.
http://pdf.datasheetcatalog.com/data...shiba/3201.pdf
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