On 09/23/2015 10:24 AM, John Larkin wrote:
On Wed, 23 Sep 2015 16:01:26 +1000, Trevor Wilson
wrote:

On 23/09/2015 5:34 AM, bitrex wrote:
So I'm working on repairing a Korg MS2000B synthesizer for a friend with
a dead power supply. Here's the service manual:

http://www.loscha.com/scans/Korg_MS2...ice_Manual.pdf

The first thing I notice when looking inside is that the small SMT 100uF
10V tantalum capacitor C109 has completely vacated - it appears to be
gone, blown right off the board. There are some little fragments
rattling around in the case.

I have little experience with tantalum capacitors. Any suggestions for
a more reliable replacement?

**Tants are not unreliable. In fact, IME, they're more reliable than
aluminium electros (not a scientific study though - just seat of the
pants). They do not tolerate reverse Voltages particularly well though.

Use another tantalum. Solid are best, but hard to find.

Most tantalum caps are solids, with the MnO2 electrolyte. Less common
are liquid types and polymers.


Wet tants are super-expensive. ISTR they're basically military-only.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net