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Old 5th January 2012, 01:59 AM   #1
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Default Need help trouble shooting my BK ST 140

I have a BK ST 140 witch has one channel that works normal and one channel that is very weak and thin unless I turn the balance all the way to that side and crank up the volume high but even then then the bass is nearly non existent...I have swapped speakers, cables, interconnects and source so I know for sure the amp is the issue...I am an electrician but I'm no electronics tech...If any one had this issue and has resolved it I would greatly appreciate some feedback...thanks
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Old 5th January 2012, 11:38 AM   #2
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Check the cap in the feedback loop to ground, and the input cap.
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Old 11th January 2012, 06:51 AM   #3
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Quote:
Originally Posted by djk View Post
Check the cap in the feedback loop to ground, and the input cap.
Thanks djk...where would that be located?..I know the circuit board for the st 140 seems fairly simple looking...perhaps I should change all the caps??
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Old 11th January 2012, 09:54 AM   #4
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If you can provide a photo, I could mark it for you.

Otherwise, change all the small electrolytics (if over about 7 years old this is worthwhile anyway).

Click the image to open in full size.
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Last edited by djk; 11th January 2012 at 09:59 AM.
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Old 21st February 2013, 07:42 AM   #5
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Quote:
Originally Posted by djk View Post
If you can provide a photo, I could mark it for you.

Otherwise, change all the small electrolytics (if over about 7 years old this is worthwhile anyway).

Click the image to open in full size.
thank djk...got me a crazy guy upstairs to replace the caps and yes there was improvement
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