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felipe  
#1 Posted : Monday, December 19, 2011 12:14:34 PM(UTC)
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Connecting my new BIII with my Legato with output caps, I measured AVCC (on the Buffalo, at the output of the AVCC module) +3,4VDC, I adjusted VR1 and VR2 on the Legato until each of the inputs sit as close to AVCC/2 as possible, Right channel perfect now 1.69VDC but Left channel always -0,71V both Legato inputs (hot + cold), could you help me?

N.B. BIII OK 5.25V 500mA, Tridents OK two 3.3V & one 1.2V, AVCC OK 3.4V

Edited by user Monday, December 19, 2011 12:25:32 PM(UTC)  | Reason: Not specified
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Russ White  
#2 Posted : Monday, December 19, 2011 4:53:40 PM(UTC)
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Sound like a possible issue (soldering or dead part) on the left channel. Can you post pictures?
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felipe  
#3 Posted : Thursday, December 22, 2011 4:18:16 AM(UTC)
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felipe  
#4 Posted : Thursday, December 22, 2011 5:51:35 AM(UTC)
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To avoid a cold joint solder I resoldered again all left channel and issue not fixed.
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felipe  
#5 Posted : Thursday, December 22, 2011 8:25:43 AM(UTC)
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Just ordered one new Legato without output caps and without output buffers, if possible could you send me a new set of transistor to fix the issue of my old Legato?
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Brian Donegan  
#6 Posted : Thursday, December 22, 2011 8:28:01 AM(UTC)
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How did you determine the problem was transistors?
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felipe  
#7 Posted : Thursday, December 22, 2011 9:26:10 AM(UTC)
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I don't see any resistor or capacitor damaged so I suspect of transistors.
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