15 Apr
2012
15 Apr
'12
3:41 p.m.
On Apr 13, 2012, at 3:19 PM, Holm Tiffe wrote:
Hi guys,
Yesterday eavening I've checked my new TSZ07 9 Track Tape on my VS4000/90
the first time, it worked flawlessly. Later I've switched it of with the
power button on the fron paneel.
This morning the Drived stinked. A smell like an burned transformer.
I've pulled the powerchord and leaved to go to work.
Now I have dismounted the PSU and looked inside: Shit!
There are 2 board in there, the one with the big Heatsink in the middle has
on one edge an uncooled TO220 Transistor (or something looking like one)
and a wirewound resistor near by. The entire area around them is burned
black. Noch chance to read Parts values or so. The PCB is bad also, burned
to carbon. Interestingly this PSU (and the entire Drive) is still
working... no fuse blown or something. :-|
Don't panic immediately; exploding resistors can make a big mess *on*
things without making a big mess *of* things. Is the PCB actually
burned, or is it just covered in black crap from an exploding resistor
or capacitor? Is it also possible that you have an area of the board
which routinely gets rather toasty, which tends to discolor it over
time? FR-4 tends to bubble a bit when it gets way too hot, so look
for that if you suspect something's been getting dangerously hot.
Can't help you on schematics or expertise, except to give you the
same advice found on the cover of the Hitchhiker's Guide to the
Galaxy. :-) Your trusty towel, sadly, might not help here, but you
never know.
- Dave