Regarding replacing MPSU57 with MPSA56, it would be much better to use MPSW92R...
http://www.digikey.com/product-detail/en/MPSW92RLRAG/MPSW92RLRAGOSCT-ND/1967202?cur=USD
however, an ideal replacement (much closer equivelency) component would be the ZTX753...
http://www.digikey.com/product-detail/en/ZTX753/ZTX753-ND/92510
The NPN compliment to this would be the ZTX653...
http://www.digikey.com/product-detail/en/ZTX653/ZTX653-ND/92504
A good sub for MPSU07 is MPSW42G...
http://www.digikey.com/product-detail/en/MPSW42G/MPSW42GOS-ND/1482545?cur=USD
Also, the MPSU10 can also replace the 07.
A good press-on heatsink for the newer parts is here:
http://www.digikey.ca/scripts/DkSearch/dksus.dll?WT.z_header=search_go&lang=en&keywords=HS251-ND&x=19&y=21&cur=USD
Bill Boucher
http://www.biltronix.com
> From: Ian Eure <ieure@mac.com>
> Date: Fri, Nov 23, 2012 at 2:27 AM
> Subject: VECTOR: Modern replacements / xref for deflection transistors
> To: vectorlist@vectorlist.org
>
>
> I managed to fry a G05 board pretty well. I swapped this working board into
> a dead monitor to test, turns Q608 & Q709 had been swapped and R718 caught
> fire. Also as it happens, someone had replaced F700 on this deflection
> board with a 10A fuse, so while F600 blew and the Y section is likely fine,
> a bunch of stuff in the X section got fried.
>
> It looks to me like R718, R713, Q705, and Q706 at least are dead.
>
> Q705 is just a 2N3906, which I can get anywhere, but Q706 looks harder to
> come by. While I was digging around the internet, I found this incredibly
> great list of V2000/G05 transistors with some cross references:
> http://westnet.com/~chris/arcade/g05_transistor_list.pdf Unfortunately,
> this list is a good 13 years old itself, so the parts it suggests are
> obsolete as well.
>
> I went looking around and MPSU57 is long discontinued, as is SK3200 and the
> "upgrade" NTE50 part. NTE189 is the modern replacement for NTE50, but seem
> to be extremely expensive ($30) when they can be found at all. I found some
> folks saying they had successfully substituted MPSA56 for MPSU57, as well
> as MPSA05 for the MPSU07 at Q607/Q707.
>
> Has anyone successfully substituted those parts? Looking at the datasheets,
> it seems like the tolerances are somewhat lower, so I was hoping someone
> could point me in the right direction. I have a few boards I want to work
> through, so having some of these on hand will be a big help.
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Received on Fri Nov 23 15:39:00 2012
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