Rara wrote: ↑
Sun Mar 04, 2018 12:00 pm
Hello, sorry for the hugely late reply I had lost my login details and could not remember
them and looks like there's been a few changes since I last was here ... any how ....
I still have my FZ-1and still use it from time to time, at present toying with mellotron 400 samples with it,
the choir samples can sound quite eerie.
I have not had a problem with midi after cutting the tracks to the back light inverter.
if you do go that way, make absolutely sure the tracks are cut after the midi and before the inverter.
Study the schematic!!! I don't want to be responsible for a dead FZ.
I recently had a question pop into my head ...
Is the Hohner HS-1 a 1:1 replica of the FZ-1, or did the Germans do a little tweaking with it?
Did they by any chance improve upon the existing display in the FZ-1? those three ribbons cables and circuit board are a night mare.
Is it worthwhile trying to hassle casio enough to produce an aftermarket replacement (if possible) if enough interest was generated?
If Alesis can still have replacement screens for an sr-16 why not Casio? (wishful thinking)
Thanks very much for all the great info here.
I've just cannibalized an iphone 4 light to use as a backlight, and I power it from the 12v rail that used to power the floppy drive. The corresponding 5v rail now powers an HXC floppy emulator, so I'm in business there.
On the advice of Miks (and Graham Meredith) I simply desoldered the little transformer (ET16) from the MIDI board (M5336 - ASIM). MIDI is working just fine. Pretty great.
My question now is, long term, is there any problem with simply taking out the transformer, instead of cutting the traces and putting a jumper in? I'm fairly new to this, so excuse my ignorance, but that circuit that the ET16 transformer was a part of is now just a dead end. Are there dangers to that?
Also, you mentioned waaaay back about some noise in the audio path, which I'm also experiencing. The FZ's have a wonderfully dirty filter, but mine (I have two) have a rather unpleasant distortion toward the tail of notes, when the filter is closed, or close-to-closed.
I haven't done enough tests with the PSU yet to determine whether it needs revamping (I assume it does), but I envision replacing the filter caps, transistors, and bridge rectifiers to improve things overall. You think I can expect an improvement in the noise in the audio path?
I'm not sure what my next step would be after that.
Anyway, I know this is a really old thread, but if you ever happen to pop by again and have any thoughts, I'd really appreciate it.
And again, thank you for all your help thus far. This process would not have been possible without you and a few others. This synth is really too great to be abandoned. Never played anything like it.