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christensenleif@msn.com wrote:I resoldered the whole board
best
Leif What do you mean by saying this? Are your problems solved now, or not? regards, ed
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no it was only a reply to exclude cold solder joint as possible/likely problem
still minus 1,11-1,2 vdc on both se and bal out when hooked up with piggybacked BIII board
best
Leif
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yes faulty on just one channel
but whole board was resoldered/"soldered over"
best
Leif
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Ok, well I supposed you could replace all the transistors on the dead side. You might be able to find the killed one if you have a semiconductor analyzer, but that may not work with the parts "in circuit".
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first I´ll build the L3 that now waits in the norw customs and test
if all well, I´ll either just cut them all out(easier) and order new ones, or test them in my multimeter with that feature and replace
surprises me though, that the minus 1,1 vdc in one channel on both se and bal doesn´t give any indication
best
Leif
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second L3 inhouse and waiting to be assembled
I´ll be back
best
Leif
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hello
new L3 is installed trimmed and singing
what now with the faulty one?
do I just replace all mosfets?
best
Leif
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Hi Leif.. Why don't you try running with only 1 FET per half channel. Then you can swap FET's until you find the faulty one(s). Edited by user Saturday, March 10, 2012 11:41:52 AM(UTC)
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Rank: Member
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what do you reckon Russ?
should I just replace the Mosfets?
the cost is close to nothing, and if I knew it would cure this shitty fault, it´s definitely worth it, instead of spending more time on this
best
Leif
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all transistors replaced on LCH
all works perfect
case solved
HURRAH!
thxs guys
have a nice weekend
best
Leif
Norway
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So you use the LME 49600 buffer ! ? Maybe I will use the jumpers to avoid it. I use the Dexa discret opamp but think the Burson is better !
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I don´t have the buffers at all
best
Leif
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