Yes, I've replaced leds in all of my modules with blue leds, I've
even fitted blue 7 segment displays to the A-113 subharmonic
generator and a blue LCD display to my Schaltwerk sequencer as well
as 200 rectangular blue leds - not for the faint hearted! (see files
area of Schaltwerk Yahoo group for pix of this mod)

For standard modules use 3mm Blue leds, if your UK get them from
Rapid electronics, Kingsbright L-934m series at 70 pence each. No
need to worry about changing current limiting resistors, they just
drop straight in.

Be particularly careful on the modules that use double sided pcb's,
the tracks are very thin and easily damaged - easiest way to remove
the old led is to heat both pads simultaniously with soldering iron
and then very carefully pull led out. Then use a de-soldering braid
to remove the old solder from the holes before inserting the new led.

Hope this helps,
Allan

part in the--- In Doepfer_a100@yahoogroups.com , "John Talbert"
<jvtalbert@y...> wrote:

> Hello all,
>
> Has anyone here actually done the "red to blue" LED replacement

work

> Are there any specific issues that I should be aware of I've got
> three or four modules that I need to update soon.
>
> Kindest regards,
> John