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Old 11th February 2013, 01:41 AM   #1
diyAudio Member
Join Date: Jun 2012
Default Xtant X1001

Q325 was defective..

Replaced it when tryin to power the amp up the power led lights and the low Impedance light is also lit..

Led 406 and 407 are also lit up..

All outputs test fine..

With the blck probe on pin 5 and red probe on Pin 8 of the 3120's
1 of them i get 20.8 volts the other 1 i get 0.1 volts

Any ideas where to start?

Last edited by S Merlington; 11th February 2013 at 01:50 AM.
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Old 11th February 2013, 01:57 AM   #2
diyAudio Member
Join Date: Jun 2012
Ok i did somemore checking..

Low impedance light is still lit..

I get -18.8 volts on all op-amps but i dont get the positive voltage is this normal for this amp??

If not does anyone know what the board location is for the positive regulator ?
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Old 11th February 2013, 05:47 AM   #3
diyAudio Member
Join Date: Nov 2003
Location: Louisiana
Do you have positive 15v on both ends of one of the SMD inductors (marked 221k) near the yellow transformer (near the speaker terminals)?
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