PL 400 series 1 XPL910 questions

quirkaudio

New Around These Parts
Joined
Jan 11, 2021
Messages
6
#1
Hi
I have a PL400 series 1 with XPL 910 outputs, two of which appear to be fried. I have purchased an installed the White Oak Cap replacements and purchased, and not yet installed, the watts abundant speaker protection.

I understand that one needs to replace all the transistors in one channel , so is there a suitable substitute ( these are darlington transistors),- both the fried were on the same channel, and all drivers transistors (RCA) test OK.

alternatively if I install the white oak PL14 replacement board and the white oak backplane board, what outputs can I install?

I used to have one of these back in the day, but this is the first one I have worked on- and my first post here

Thanks in advance for any and all assistance

btw the amp has a "diane" sticker under the PL14 board- what is this?

Peter
 

Gepetto

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#2
Except for the RCA410 drivers in the bottom row, replace all those original transistors with MJ21196G output devices. 12 of them.

The originals are junk Peter.
 

George S.

Chief Journeyman
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Feb 18, 2020
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#5
Dianne is the lady who wired your amp. There is a Phase Linear Christmas Card photo somewhere on this site with a photo of the "crew" and identifying names. Can someone post a link as I have looked many times and can't find it again. Perhaps Dianne is in the photo. Linda and many others are.
 

FredR

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WTF?
#6
Dianne is the lady who wired your amp. There is a Phase Linear Christmas Card photo somewhere on this site with a photo of the "crew" and identifying names. Can someone post a link as I have looked many times and can't find it again. Perhaps Dianne is in the photo. Linda and many others are.
Even if we gut the amp to bare chassis, we keep the original sticker in it. It's a way to honor the person who originally brought the amp to life.
 

quirkaudio

New Around These Parts
Joined
Jan 11, 2021
Messages
6
#8
Diane sticker will remain untouched.

I have opted to put the WO PL14 board in and will post some photo's when done
Thanks agian
 
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