On 03/11/2014 13:46, Leif Neland wrote:
Phil Allison kom med følgende:
Hi,

some of you may be familiar with this all Chinese design badged "Fender".
http://edu.znate.ru/tw_files2/urls_2..._m3d62dc1a.jpg

Odd looking but quite functional with a pair of 80W Hitachi mosfet
amplifiers and inside a regulated SMPS in the bottom of main unit.
One arrive last week *dripping water* out the main unit and both
speakers - seems it had been caught in a flood about 10 days
previously and was immersed up to the line of the XLR sockets.

( Why do people think it OK to let the water remain inside and do its
worst for so long ?? )

Got the speakers apart first, removed the four drivers, towelled off
the surface water and let the lot sit out in the sun for a couple of
days. It had become rather smelly and the only fix I know is sunlight.
Next, the main unit ( also smelly) had to be completely disassembled,
a huge number of screws involved, to gain access the SMPS which has
its own enclosure right at the bottom - it was still soaking wet.
Pulled out the PCB and fan and gave that a good wash in the sink
followed by a half hour in the oven at about 80C. The PCB need
scrubbing to remove the white residue of dissolving solder - as did
the amp PCB.
Used up plenty of PCB spray cleaner and then applied WD40 with a soft
brush to every metal surface and connector. Then left it all out in
the sun too.
Tested the SMPS first with a dummy load and blow me down it worked
fine. Attached the rest of the electronics and they worked OK too.
Re-assembled and tested the speakers and found they had also survived.
Naturally, I let the main unit run for many hours to make sure there
were no issues with hidden moisture.
On informing the customer of my success he asked:

" was there much to do" ?

What was your bill?
What is the cost of a new one?
Was the customer ensured?
What warranty do you offer on the repair?

Will it ruin the show if this speaker dies during a performance?

In short, while the repair was heroic, I would have turned down the
customer, or at least informed of the risk of future failure.

Leif


Seawater or tap/rain water? Powered up or on standby when flooded?