I have got a Sovereign XS2A-Pro which was completely dead,opened it up and found someone had removed the O-crystal out -so have replaced it...Now I have working threshold tone!! But nothing else!! But thats a start!
Next step- I did a voltage test (Neg-battery & Pos to the 3 pins) on
what I believe are the 4 Mosfets? (see photo)
and compared the readings with another Good working XS2A-pros readings.
(both machines were switched ON and the readings taken from the board underside)
Heres the readings:
Faulty XS2A-Pro Good Working XS2A-Pro
MTP2955 0v 6.37v 11.03v 6.11v 6.21v 11.12v
MTP3055 6.38v 6.41v 1.78v 6.11v 6.21v 1.28v
MTP3055 6.23v 6.39v 1.78v 6.04v 6.20v 1.28v
MTP2955 6.22v 6.37v 10.98v 6.03v 6.20v 11.11v
As you can see I look to have a fault on a MTP2995 Mosfet? (arrowed in photo)
Can anyone enlighten me as to function off this and would a simple replacement
suffice? or could there a problem elsewere causing this?
Any help/advice would be most appreciated. Thanks.
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« Last Edit: March 29, 2012, 07:11:17 am by chopz54 »
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