[lo_tse]

I hope James would throw some light on the situation. 

My 15 years old 4B ST has been working flawlessly since new.  A few days ago, while I was listening to some of my favourite mussic, I noticed that the left speaker was off its optimum location slightly.  So, I got up and nudged the speaker a little back to the right spot while the system was still playing.  Big mistake .  I heard a slight pop and the left channel was gone.  The left channel LED was off too.  The right channel is till OK.  Apparently, the spades at the terminals of the left speakers were loosen and touched.  My question is, did I blew some of fuse (or a safety relay)  :duh:inside the amp?  Are there anything that I can do to fix the problem or I have to get professional help from Bryston?

Thank you in advance for any suggestions.

Lo_tse

[BrysTony]

I hope James would throw some light on the situation. 

My 15 years old 4B ST has been working flawlessly since new.  A few days ago, while I was listening to some of my favourite mussic, I noticed that the left speaker was off its optimum location slightly.  So, I got up and nudged the speaker a little back to the right spot while the system was still playing.  Big mistake .  I heard a slight pop and the left channel was gone.  The left channel LED was off too.  The right channel is till OK.  Apparently, the spades at the terminals of the left speakers were loosen and touched.  My question is, did I blew some of fuse (or a safety relay)  :duh:inside the amp?  Are there anything that I can do to fix the problem or I have to get professional help from Bryston?

Thank you in advance for any suggestions.

Lo_tse

When you created a short between the speaker cable + and - it most likely blew a fuse on that side.  The fuses are on the back panel and you can easily check it.  UNPLUG the amplifier before you remove the fuse.  If it is a glass fuse you can see the filament and whether it has a break.  That is most likely the problem and it is not likely that other damage would have occurred.  Good Luck!!

Tony

[James Tanner]

I hope James would throw some light on the situation. 

My 15 years old 4B ST has been working flawlessly since new.  A few days ago, while I was listening to some of my favourite mussic, I noticed that the left speaker was off its optimum location slightly.  So, I got up and nudged the speaker a little back to the right spot while the system was still playing.  Big mistake .  I heard a slight pop and the left channel was gone.  The left channel LED was off too.  The right channel is till OK.  Apparently, the spades at the terminals of the left speakers were loosen and touched.  My question is, did I blew some of fuse (or a safety relay)  :duh:inside the amp?  Are there anything that I can do to fix the problem or I have to get professional help from Bryston?

Thank you in advance for any suggestions.

Lo_tse

It may have taken out a pair of the output transistors.

james

[lo_tse]

Tony,

Thank you for the suggestions.  I actually had opened up the top and check the 2 fuses you mentioned.  Both looked fine, the "filaments" are still intact.  I also checked them with a multimeter and both read OK (very low resistance).  No open circuit there.  Look like something more serious had occured

James,

Well I think you are probably right, the output  transistors probably acted as a fuse  .  So, I guess I have to ship the amp to Peterborough and let you guys look at it?

Lo_tse

[BrysTony]

Tony,

Thank you for the suggestions.  I actually had opened up the top and check the 2 fuses you mentioned.  Both looked fine, the "filaments" are still intact.  I also checked them with a multimeter and both read OK (very low resistance).  No open circuit there.  Look like something more serious had occured

James,

Well I think you are probably right, the output  transistors probably acted as a fuse  .  So, I guess I have to ship the amp to Peterborough and let you guys look at it?

Lo_tse

Lo_tse,
I suggest that you hook up the right channel to the left speaker to be sure that it not did not blow the speaker. Then you will know for sure that it is the amp.

Tony

[BrysTony]

Lo_tse,
I suggest that you hook up the right channel to the left speaker to be sure that it not did not blow the speaker. Then you will know for sure that it is the amp.

Tony

I just re-read your post and see that the left LED is out. Must be the amp.
tony