Sansui AU-717, AU-517, AU-417, AU-719, AU-6600, AU-6900, AU-7700, AU-7900 Restore service. Does your amp need new electrolytic capacitors? Here is how to tell, unplug all input cables and put the amp on AUX or TUNER input, then turn up the volume if you hear any humming noise they need to be replaced, you should be able to turn the amp to full volume with no noise, also if you can see any dark brown substance on the board below the capacitor or on it then they need replacing very soon.
 NOW Please do not be fooled by repair service you will pay at least $300 for a repair but if all the electrolytic capacitors are not replaced the unit will fail again and soon! Most Sansui amps can be repaired for just a few dollars worth of parts, why pay $199 others are asking and only have a few dollars of parts replaced? plus you pay shipping both ways and if you open the cover to see what was done your warranty is voided!. Also there are a lot of units listed as serviced and professionally repaired the case might of just been polished and maybe the potentiometers cleaned.
 Electrolytic capacitors have a life of about 35 years any 70's or before and even 80's unit have capacitors that could go bad at any time and they are affecting the sound quality of the unit. If you are going to spend money on a older unit make sure all the electrolytic capacitors have been replaced or you could be wasting your money and make sure it has some sort of Warranty!!  Restoration and Service that replaces all electrolytic capacitors and a lot more! This listing is not selling a AU-717 or AU-517 it is selling a restoration for your Sansui AU-717 517 and 719 models and others listed.
  Here is what will be done: the unit will have all new electrolytic capacitors, new audio grade Elna SilmicII audio capacitors will filter the main amps, the preamp and the phono preamp, the 4 main filter caps will be replaced with new high temp caps and in the secondary power supply with Nichicon high temp capacitors, new thermal pads will be installed on all transistors needing them, I also relocate the two 2 watt resistors from the main amp boards these get very hot and damage them main filter caps moving them solves the main problem these units had also all the resistors, diodes, and transistors will be checked for value and replaced if needed along with all other components, the relay will be cleaned or replaced if needed, all the old glue will be removed and cleaned off, all the controls will be cleaned with Deoxit, the bias will be set to the original factory mV settings and the unit will be cleaned and the faceplate polished plus the unit will have a 6 month warranty and return shipping. You will have to pack the unit extremely well to avoid it from getting damaged and insure it use FedEx if possible return shipping is free, the unit is returned about 2 weeks or less after it is received. I rebuild Sansui amps I will also trade or buy your non working Sansui unit if interested or question about the service please email me first.  Thank You.
   This is a email received from a recent costumer:
 Hi there. The Sansui 717 arrived in Singapore last Thursday. I have been playing it ever since. Thanks for a superb job refurbishing the insides of the amp. Looked near mint and smelled like it was straight out of the factory in 1977! It was everything I read about it and more. Not only was it tube like in sound but put out loads of power. I have not turned the volume much beyond the 8 o clock position. So I really didn t mind paying your price on eBay!  All the best.