From: mark_zacharias@sbclobal.net   
      
   "Tim Schwartz"  wrote in message   
   news:4BDEBAED.6000406@bristolnj.com...   
   > On 5/1/2010 2:15 PM, Kinda tech wrote:   
   >> I have a carver hr-895. I have a clicking static coming out of the right   
   >> bank or speakers. The speakers are not blown. Can anyone tell me what   
   >> the possible problems are? Please and thanks for all help.   
   >>   
   >>   
   >>   
   >>   
   > Overheated transistors a baked soldering on driver transistors for front   
   > channels.  (2SC2705 and 2SA1145 as I recall) Look down any you'll see the   
   > darkened area of the 'mother' board.  Extensive resoldering, and sometimes   
   > replacing the transistors will cure it.  Be careful, as the foils are VERY   
   > delicate and easily damaged, especially as they've been baked to death.   
   >   
   > Regards,   
   > Tim Schwartz   
   > Bristol Electronics   
   >   
      
   I've seen some older Pioneer surround receivers with this problem. You have   
   to replace about 20 transistors to fix all 5 channels, but even after   
   repaired the problem recurs in another several years. I think the problem   
   was simply that the transistors were being worked too hard - they were a bad   
   choice for the application, but this didn't become apparent until later. To   
   my knowledge Pioneer never did come up with a substitute set of transistors   
   to fix the problem, although one could no doubt come up with subs.   
      
   Mark Z.   
      
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