Buncha DDD-1 bends

[Ludo]

hi! on the DDD-1 there are two of them -
is it the one thats labeled x1 on the pcb or x2?

i tried x2 - but somehow it doesnt work right ...
thanks

[Ludo]

Hi all of you!
sadly i'm having a problem with the installation of  a LTC1799 PITCH CONTROL to my ddd-1:

the module works fine, i guess - i'm powering it on 5v - i double checked the power supply by using an external one.
i found the ceramic oscillator (X2 on the pcb) and desoldered it -
so there are then two wholes on the pcb left -
without the ceramic oscillator i do hear high and glitchy sounds.
if i connect the output of the LTC1799 to the first nothing happens (the glitchy sounds stay as they are)
if i do so on the second, then every sound is gone...
does anyone have an idea what to do?

thanks

[Circuitbenders]

If i recall correctly the ceramic resonator you want is at the front of the machine on the left, under the ROM card board right next to the sound ROM's and their controller IC

[Ludo]

Yes it is right there - the position on the pcb is labeled x2 - a orange coloured keramic oscillator ...
somehow doing this mod doesnt work...

do i have to leave the the ceramic oscillator on its place and just bend one leg up, similar like in the circuitbenders.co.uk decription-
even if i dont want to reuse it?
what does the other leg do? if i take it out completely do i have to do anything with the other solderpoint to make it work?

any ideas what went wrong?
thanks

[Ludo]

HI!
just succeeded with the LTC1799 OSCILLATOR mod on my ddd-1
thing is that the resonator alone is not the whole oscillator
https://de.wikipedia.org/wiki/Keramikresonator#/media/File:Pierce-Oszillatorschaltung-3.png

[Circuitbenders]

thing is that the resonator alone is not the whole oscillator

All ceramic resonators have at least those two caps as a minimum. They're C22 and C25 on the DDD1. If you look at the DDD1 schematic you can see X2 is connected directly to two pins of the gate array at IC22 with what looks like R156 in parallel, Just removing the ceramic resonator completely and wiring the LTC output into one of its vacant solder points should work

The most common reason for an LTC not working is either not setting the frequency divider right, wiring the power up wrong, or having the frequency set too high when you first connect it, so the machine immediately crashes when you start it up.

[Ludo]

i was shure that my oscillator was working right - and somehow i got to leave the resonator in its place to make everything work...
anyway thanks for the support!