Rank: Member
Groups: Member
Joined: 6/3/2012(UTC) Posts: 44  Location: Baltimore MD
|
[img]null[/img]After a couple of years of flawless operation this morning no music no lock I checked voltages and I get 5.25 volts from PS some LED are lit on little VRs on daughter boards some are not I get 5.25 vdc between in and gr on tridents and AVCC  Edited by moderator Sunday, November 30, 2014 4:31:48 PM(UTC)
| Reason: Not specified File Attachment(s):  BUF_lll_sm3.jpg (320kb) downloaded 69 time(s).You cannot view/download attachments. Try to login or register.
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 6/17/2008(UTC) Posts: 921  Thanks: 1 times
Was thanked: 70 time(s) in 69 post(s)
|
For sure something is wrong.
What strikes me is that you apparently has lost multiple tridens along with the AVCC (I don't see any light on that module)
Which environment has this Buf been sitting in? Too hot?
I could imagine a voltage surge above ~6v as the most possible cause. What's the power supply arrangement?
|
|
|
|
|
|
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)
|
The Tridents (and possibly AVCC, depending on the version) can withstand 15V input due to the new opamp (better performance closer to 6V though).
Did you try measuring the output voltage of the Tridents/AVCC? This will tell us more.
Try removing the firmware chip, AVCC, and input header and see what happens. Do the Trident LEDs start working again? Note: You will not get output w/o the AVCC mounted, but we are trying to isolate the cause at this point.
Possibilities: Dead firmware chip causing a short (not too likely, but possible). Dead AVCC (no LEDs lit). Dead DAC chip (no idea why).
|
|
|
|
|
|
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.
