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Old 17th March 2012, 03:38 PM   #1
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Join Date: Oct 2010
Default MEMPHIS PR200.2

this amp came in with shorted outputs (2SD718/2SB688) on one channel. one of the drivers (KTB631K)was also shorted. the problem is i don't have any of the KTB631K's on hand and was needing advise on a replacement part. what i do have on hand is:

KSA1220A
2SA7632
BD140-10
Attached Files
File Type: pdf KTB631K.pdf (80.1 KB, 13 views)
File Type: pdf BD14010.pdf (44.8 KB, 2 views)
File Type: pdf 2SA7632.pdf (116.1 KB, 2 views)
File Type: pdf KSA1220A.pdf (76.6 KB, 5 views)
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Old 18th March 2012, 10:54 PM   #2
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Join Date: Jun 2010
KSA1220A is ok
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Old 25th March 2012, 04:46 PM   #3
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Join Date: Oct 2010
I've replaced the outputs and one driver transitor. For some reason, I still have 20 volts dc on the repaired channel. Any help would be greatly appreciated.
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Old 25th March 2012, 07:21 PM   #4
timwebb is offline timwebb  United States
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Join Date: Jan 2010
Location: memphis tn
u have a picture of the amp? and did u check the opamps?
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Old 27th March 2012, 08:17 PM   #5
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Join Date: Oct 2010
i found another shorted transistor (KTA1266) but i don't have any on hand. would one of these be a suitable replacement?

MPSA56
2N3906
KSA1220A
2N4401
MPSW42
Attached Files
File Type: pdf KTA1266.pdf (43.3 KB, 1 views)
File Type: pdf 2N3906.pdf (148.6 KB, 1 views)
File Type: pdf KSA1220A.pdf (76.6 KB, 0 views)
File Type: pdf 2N4401.pdf (92.7 KB, 0 views)
File Type: pdf MPSW42.PDF (97.0 KB, 1 views)
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Old 27th March 2012, 08:19 PM   #6
timwebb is offline timwebb  United States
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Join Date: Jan 2010
Location: memphis tn
i buy several from them.

Search results for: 'KTa1266'
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Old 28th March 2012, 12:33 AM   #7
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Join Date: Nov 2003
Location: Louisiana
The 1220 should be a drop-in replacement if the leads will fit in the through-holes.
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