Here's a good power amp fault - Page 4

andjur78 · 21st September 2005, 08:18 AM

Its never too late!
Audio will always be here

This repair is a real pain...one would feel like a large reward after this nailing one ...:cool
I will remove the front end diff pair NPN package and substitute for another known working one. This is a Sanyo device 2SC3067
130 volt , 50mA.(google finds the spec sheet)
I don't know of any equivalents to it as yet.
Will keep all informed...

anatech · 21st September 2005, 12:08 PM

Hi andjur78,
I'm lost. What is the locator number for that part? All I saw were single TO-92 parts. 2SC1681, 2SA841 types are used as the original parts. 60V, 50 mA, 200mW, hFE 450 ish. This is a low noise part. 2SC1775A and 2SA872A are good subs. Do not waste your time with ECG or NTE parts. The cross reference book is useless, don't use it.

You can use almost anything to substitute to see if that's the problem and get the correct part later.

-Chris

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21st September 2005, 08:18 AM	#31
andjur78 diyAudio Member Join Date: Mar 2005 Location: Aussie	Its never too late! Audio will always be here This repair is a real pain...one would feel like a large reward after this nailing one ...:cool I will remove the front end diff pair NPN package and substitute for another known working one. This is a Sanyo device 2SC3067 130 volt , 50mA.(google finds the spec sheet) I don't know of any equivalents to it as yet. Will keep all informed...

21st September 2005, 12:08 PM	#32
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi andjur78, I'm lost. What is the locator number for that part? All I saw were single TO-92 parts. 2SC1681, 2SA841 types are used as the original parts. 60V, 50 mA, 200mW, hFE 450 ish. This is a low noise part. 2SC1775A and 2SA872A are good subs. Do not waste your time with ECG or NTE parts. The cross reference book is useless, don't use it. You can use almost anything to substitute to see if that's the problem and get the correct part later. -Chris

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