I went to listen to some music on my AU-G99X but when I turned it on the fuses blew. Replaced the fuses turned it back on and it did it again its been working fine but havent listened to it in a while. Anyone have any suggestions

Chris, welcome to AudioKarma. Blowing fuses is not a good sign. You have probably blown the output transistors. Did you short a speaker connection by any chance?

- Pete

Thanks for welcome. I dont think so its been hooked up for a while and I havent changed anything.Is this something that you cant find parts for or will a repair man be able to fix it

You are in the right place to get the proper info on repair. Output transistors are pretty easy to replace. I just did them on my MAC 1900. Welcome to the madne........................AK.

A compentent tech can most likely fix it. When the output transistors a blown, they often take other components out too. Where are you located?

- Pete

shelby n.c. is where I am

Have you tried powering it up with nothing connected to it?

Rob

The fuses almost all the time have to do with the power supply, may be is one of first stages you must review. Normally in the Sansuis the power stage (transistors) is protected by a relay.

There are many fuses in most Sansui equipment. Some protect the power supply others protect the output transistors. The relay protects the speakers.

- Pete

The most common cause of fuse blowing in Sansui receivers and integrated amplifiers is shorted output transistors. The protector relay will not "fix" shorted output transistors.

When the outputs go, it is necessary to check the driver transistors and the bias elements (transistor/diode/trimmer potentiometer).

Often when the outputs are shorted, they often burn out the emitter resistors, commonly .22 to .47 ohms 3 to 5 watt.

Check the small 1/4 watt and 1/2 watt flameproof resistors and and around the driver transistors in values ranging from 2.2 ohms to 820 ohms. Often, with Sansui, these open or increase in value.

Do not use NTE type replacement transistors. Go for original Japanese part numbers or recommended subs that have Japanese part numbers (2SA../2SC../2SB../2SD..).

Best,

Fred Longworth