Search found 8 matches

by ras_claat
Fri Jul 07, 2017 2:05 pm
Forum: HELP!
Topic: CASIO CZ-101 - Battery mod gone wrong?
Replies: 24
Views: 4032

Re: CASIO CZ-101 - Battery mod gone wrong?

Thank you for the further information... and for picking through the schematic. I will give this a go before sending it away - would it simply be a case of removing this part of the circuit?
by ras_claat
Tue Jul 04, 2017 4:27 pm
Forum: HELP!
Topic: CASIO CZ-101 - Battery mod gone wrong?
Replies: 24
Views: 4032

Re: CASIO CZ-101 - Battery mod gone wrong?

You are correct.... upon desoldering the diodes, they behave as expected.

I am stumped, and will attempt to find a local tech who isn't already swamped with work.
by ras_claat
Tue Jul 04, 2017 3:18 pm
Forum: HELP!
Topic: CASIO CZ-101 - Battery mod gone wrong?
Replies: 24
Views: 4032

Re: CASIO CZ-101 - Battery mod gone wrong?

I've taken the back off to have another look, and it seems as though both DS135 diodes on board MA2M have failed, as they both have slightly blackened legs and are allowing current to flow in both directions. Please forgive more of my electronic noobery, but - if these failed before my recent 'mod' ...
by ras_claat
Fri Jun 30, 2017 2:26 pm
Forum: HELP!
Topic: CASIO CZ-101 - Battery mod gone wrong?
Replies: 24
Views: 4032

Re: CASIO CZ-101 - Battery mod gone wrong?

Well no, it didn't run fine. You had that drain on the RAM cart battery. So it does seem like something has failed. I think it is likely that this will be an easy fix for a competent tech, worth it for a synth of this value. You're right... what I mean is that it was broadly operational, with some ...
by ras_claat
Fri Jun 30, 2017 1:09 pm
Forum: HELP!
Topic: CASIO CZ-101 - Battery mod gone wrong?
Replies: 24
Views: 4032

Re: CASIO CZ-101 - Battery mod gone wrong?

Thank you very much, this is interesting. The synth ran fine from a PSU before I installed this 'mod' - have I pushed a faltering system over the edge by doing so? As in, made the underlying problem more severe? I can read schematics to a point- slightly concerned that the CZ101 will be beyond my co...
by ras_claat
Fri Jun 30, 2017 11:49 am
Forum: HELP!
Topic: DrumTraks--Jumpy buttons and pots
Replies: 3
Views: 1376

Re: DrumTraks--Jumpy buttons and pots

I'd be interested to know if you managed to pop the lids off the buttons - I had the multi/non-triggering problem with an important button myself and couldn't work out how to do it in a way which felt like it wasn't going to split the plastic. I ended up taking a lesser-used button from somewhere el...
by ras_claat
Fri Jun 30, 2017 11:03 am
Forum: HELP!
Topic: CASIO CZ-101 - Battery mod gone wrong?
Replies: 24
Views: 4032

CASIO CZ-101 - Battery mod gone wrong?

Hello there. I've had a CZ-101 for many years, and it's been criminally underused. Lately I've been programming it and loading patches and getting to know it again, and was really enjoying how its sounds contrast with the other gear I have, and what it's possible to do with such a small synth. The m...
by ras_claat
Fri Jun 30, 2017 10:37 am
Forum: General Synthesizers
Topic: Your latest musical purchase
Replies: 135
Views: 117715

Re: Your latest musical purchase

Wow! that really does look like it's in excellent condition.