Replacement part for MC2100

diyman · 23rd May 2008, 07:41 PM

Hi,

Anyone have an idea of what I can use to replace the bias diode part no. 070-046 in the MC2100 driver board?

Regards.

grant_MH · 23rd April 2009, 01:39 AM

I removed the bias diode from the PCB and measured its resistance while holding it very close to a hot soldering iron and watched the resistance go down as the temp went up - I suspected mine was causing the left channel PA transistors to heat up, but now that the amp is working I have to conclude that the diode is ok.

No one seems to know what this part can be replaced with - may have to contact Mcintosh to find one. If you find the part id please let me know, too ; I'm sure that lots of other folks are also interested

thanks, Grant

diyman · 23rd April 2009, 01:23 PM

You can try MZ2361 from Motorola which is still available. It is listed as a replacement in Mcintosh's semiconductor replacement manual. Hope this helps.

ckt:

grant_MH · 23rd April 2009, 03:41 PM

thank you diyman!

23rd May 2008, 07:41 PM	#1
diyman diyAudio Member Join Date: Nov 2001 Location: Malaysia	Replacement part for MC2100 Hi, Anyone have an idea of what I can use to replace the bias diode part no. 070-046 in the MC2100 driver board? Regards.

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23rd April 2009, 01:39 AM	#2
grant_MH diyAudio Member Join Date: Mar 2009	I removed the bias diode from the PCB and measured its resistance while holding it very close to a hot soldering iron and watched the resistance go down as the temp went up - I suspected mine was causing the left channel PA transistors to heat up, but now that the amp is working I have to conclude that the diode is ok. No one seems to know what this part can be replaced with - may have to contact Mcintosh to find one. If you find the part id please let me know, too ; I'm sure that lots of other folks are also interested thanks, Grant

23rd April 2009, 01:23 PM	#3
diyman diyAudio Member Join Date: Nov 2001 Location: Malaysia	You can try MZ2361 from Motorola which is still available. It is listed as a replacement in Mcintosh's semiconductor replacement manual. Hope this helps. ckt:

23rd April 2009, 03:41 PM	#4
grant_MH diyAudio Member Join Date: Mar 2009	thank you diyman!

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