Rank: Member
Groups: Member
Joined: 12/7/2011(UTC)
Posts: 474
Location: Amsterdam
Thanks: 31 times
Was thanked: 4 time(s) in 3 post(s)
|
Hi,
I just got the DAC powered again after the big final buidup.
I was meassuring the voltages and the currents again and noticed that the shunt current of the RH Placid HD is fluctuating somewhere between 16 to 59mA.
This is still an overcapacity.
How can it happen at one time suddenly?
Is the pot corrupt?
thx in advance,
Jordo
|
|
|
|
|
|
Rank: Administration
Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 2,868
Location: Massachusetts, USA
Thanks: 2 times
Was thanked: 141 time(s) in 134 post(s)
|
Loose wire or cold solder joint is the most likely cause.
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 12/7/2011(UTC)
Posts: 474
Location: Amsterdam
Thanks: 31 times
Was thanked: 4 time(s) in 3 post(s)
|
Thx Brian,
Would it be likely that a cold solder joint will suddenly appear?
I haven't had it before..
Loose wire at the power output? The voltage is steady.
|
|
|
|
|
|
Rank: Administration
Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 2,868
Location: Massachusetts, USA
Thanks: 2 times
Was thanked: 141 time(s) in 134 post(s)
|
My impression is that it worked prior to mounting in its new home. If that is the case, it stands to reason that it is something mechanical that changed in the move.
The two things that come to mind as the cause of the problem, is a cold solder joint (less likely, but possible, most likely a ground pad because due to the ground plane, they are harder to heat sufficiently) or a loose wire (quite likely since it was all just wired up).
It will take some poking around to eliminate that cause.
Try disconnecting and reconnecting the wires to the terminal blocks. Try reflowing the joints of easily nudged components (heatsinks, large caps, etc).
It is certainly possible that it is a pot issue, but likewise, why would it suddenly be a problem? Possible but less likely.
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 12/7/2011(UTC)
Posts: 474
Location: Amsterdam
Thanks: 31 times
Was thanked: 4 time(s) in 3 post(s)
|
Thx for the advice,
I will take a look at it in the next few day's ;)
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 12/7/2011(UTC)
Posts: 474
Location: Amsterdam
Thanks: 31 times
Was thanked: 4 time(s) in 3 post(s)
|
Thx Brian!
Playing around with the powerconnections did the trick! ;)
Solved.
Jordo
|
|
|
|
|
|
Forum Jump
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.
