Sansui AU-317 caps

[JackieJoe]

(post a pic of the solder side of that board)

Solder side looks pretty good. A you can see they replaced 4 resistors as well and they test all 4 ok.
Previous owner did some work on F- 2751 but i'm not sure if replacements has been done with the right components.
I'm posting few pics so if you guys can spot something wrong or have suggestions on what needs to be done i would be thankful.
I'm going to clean the glue with acetone and replace capacitors. Do you have any tip how to clean and polish the fascia without erasing numbers and writings?

 

[JackieJoe]

a few more

 

[Hyperion]

Stains under each of them must be related then to insulators which are missing in my amp and instead i've seen in others au-317 pics. Maybe them went damaged and removed???

I have never seen any insulators under capacitors in AU-317's, some (radial) polystyrene capacitors (similar to the transparent silvery ones in your pictures) have a pink or yellow coloured base which helps them to stand upright, but these are not generally found in AU-317.

 

[JackieJoe]

I have never seen any insulators under capacitors

You are right, insulator is probably not the right word but If you look better they are like transparent spacers almost covered of dirt. Anyway i'm going to clean them all and hopefully it'll be ok.

 

[JackieJoe]

Do you guys know what is the value of C30 as i think it got damaged while cleaning the glue ? If it fails would damage other components?

 

[Hyperion]

Do you guys know what is the value of C30

33pF - the same as C32, C31 & C29.

Do you have a Service Manual or a copy of the Schematic - these contain the answers to such questions.

AK has a copy in the Service Manual Library that you can download - free!

Here:-

AK Database PDF Gallery - Sansui/Sansui AU-111 Owner & Service Manual

If it fails would damage other components?

Yes - this info is not in the SM.

 

[JackieJoe]

33pF - the same as C32, C31 & C29

Thanks very much, i have the schematics but i was looking at C30 only and that does not show the value, i didn't know it was the same as C29 which indeed show as 33p. Would that be ok? It has no polarity?

FREI Condensatore ceramico, 33 pF, 5 %, SL, 500 V, RM 5 | Dischi a prezzi molto vantaggiosi | reichelt elektronik

Condensatore ceramico, 33 pF, 5 %, SL, 500 V, RM 5 Dischi de FREI - Consegna affidabile ✓ prezzi vantaggiosi ✓ Per aziende e privati ✓ Ordina subito online su reichelt elektronik!

www.reichelt.com

 

[Hyperion]

Would that be ok? It has no polarity?

Correct, Ceramic capacitors have no polarity, the value should be marked on one side or the other - it's vanishingly rare for the value to be missing.

This is much better

KEMET Condensatore ceramico multistrato, 33 pF, 200V, 125°C | Multistrato, cablati, NPO 5% a prezzi molto vantaggiosi | reichelt elektronik

Condensatore ceramico multistrato, 33 pF, 200V, 125°C Multistrato, cablati, NPO 5% de KEMET - Consegna affidabile ✓ prezzi vantaggiosi ✓ Per aziende e privati ✓ Ordina subito online su reichelt elektronik!

www.reichelt.com

Replace all four C29, C31 and C30, C32 i.e. in both channels.

 

[JackieJoe]

This is much better

Thanks a lot, i'll get those ones. I just finished cleaning the glue, it takes acetone and a loooot of patience

 

[JackieJoe]

Work in progress, now waiting on components for a partial recap.
Maybe a silly question but do you guys know if the power cable is the original one?

 

[Sui-Yogi]

Maybe a silly question but do you guys know if the power cable is the original one?

Classic Sansui power cable from that era for the lower powered models …. Looks original to me .

 

[Hyperion]

Maybe a silly question but do you guys know if the power cable is the original one?

I don't remember seeing a cable with a white trace in it, but in all other respects it looks original as Sui-Yogi says.

 

[Sui-Yogi]

I don't remember seeing a cable with a white trace in it, but in all other respects it looks original as Sui-Yogi says.

My 517 and 717 has the same with the white stripe ( by now yellowish from nicotine and time deterioration

 

[JackieJoe]

My 517 and 717 has the same with the white stripe

Thanks, I will keep it as i'm trying to keep everything as stock as possible