fuse problem - pioneer sa-7500

[pezza89]

Hi there ,

i have a pioneer sa-7500 which seems always blows the main fuse on the rear whenever you try to use it. any ideas what could be causing this? Any help is much appreciated, thanks! Andy

 

[EchoWars]

Blown mains fuse generally indicates blown output transistors. Pull them out and test them.

 

[pezza89]

thanks for that...if i check them and their gone, is it safe to change them or does it mean something else caused the outputs to blow??

 

[east electronics]

except

outs you have to look the overall of the machine ...hapend to me before that rectifier was shorted ( twice ) and of cource if outs are gone drivers is also possible .....ofset and idle should be checked ...and goes on

it could be from a very easy thing to a very difficult task .....

 

[poynton]

Hi,

Are we talking about the mains fuse or the DC fuses inside??

Check the voltage setting. Is it set for the correct voltage ?
(Australia 220v)

If it is the external mains fuse, are the internal fuses also blown ?

Andy

 

[pezza89]

hey all, thanks for everyones help so far!! It is set to 240v which is the correct voltage for australia...the amp is in storage, i'll get it tomorrow or the next day to check to see if the internal fuses have also blown. The one i was referring to was on the rear panel.

Do i need any special equipment to check the BIAS and DC offset?? any pointers on how to do this??

Cheers!