Search found 31 matches

by belzrebuth
Mon Oct 19, 2020 2:03 pm
Forum: HELP!
Topic: Jupiter 6 voice board A eprom image
Replies: 0
Views: 868

Jupiter 6 voice board A eprom image

Hi,
Does anyone have a Jupiter 6 eprom image for the "A" voice board?Preferably version 3 8-)
I can find the image for the "B" board but the one for "A" board is not available for some reason!
by belzrebuth
Fri May 01, 2020 1:59 pm
Forum: HELP!
Topic: MPC 2000XL freezes after boot
Replies: 0
Views: 1167

MPC 2000XL freezes after boot

Hi, I've got a MPC 2000 XL which after it boots up it freezes.. Voltages seem correct. I've also disconnected the output expander, any additional ram and the floppy. From what I understand the ERPOM OS is fine and I've also tried the Recovery ROM but the issue remains. So there is something else pre...
by belzrebuth
Wed Apr 15, 2020 2:46 pm
Forum: HELP!
Topic: Ensoniq SD-1 stuck at test mode (no boot)
Replies: 12
Views: 2486

Re: Ensoniq SD-1 stuck at test mode (no boot)

Finally fixed :D It was very tricky to hunt down why the calibration process was bypassed each time the keybed was attached to the KPC board. Since I've tried both another MPU and a KPC chip there was only the keybed PCB left to blame. After comparing with the SQ-80 schematics my problem came down t...
by belzrebuth
Tue Apr 14, 2020 2:24 pm
Forum: HELP!
Topic: Ensoniq SD-1 stuck at test mode (no boot)
Replies: 12
Views: 2486

Re: Ensoniq SD-1 stuck at test mode (no boot)

I managed to get a hold of a working S38BC010PS01 IC from a friend's EPS keyboard. Unfortunately my friend lives far from me so transport is not very easy/quick. Nothing changes with the known working KPC chip so I'm not sure what is going on here. It's like the synth does not like the keyboard at a...
by belzrebuth
Mon Apr 13, 2020 6:02 pm
Forum: HELP!
Topic: Ensoniq SD-1 stuck at test mode (no boot)
Replies: 12
Views: 2486

Re: Ensoniq SD-1 stuck at test mode (no boot)

Another update: The synth boots and behaves normally (floppy/drone problem still exists though) even without the KPC chip installed.. :shock: So that chip is the only (?) probable candidate for my problem.. I suspect it won't be cheap/easy to replace this. Unfortunately I don't have any other ensoni...
by belzrebuth
Mon Apr 13, 2020 2:11 pm
Forum: HELP!
Topic: Ensoniq SD-1 stuck at test mode (no boot)
Replies: 12
Views: 2486

Re: Ensoniq SD-1 stuck at test mode (no boot)

Dismantled the keyboard and desoldered all chips from the board. There were a couple of 74hc04 inverters and I think 2 or 3 74hc138 decoders. All checked okay in my TL866 eprom burner which has a logic chip tester mode. I resoldered those back and re-connected the keyboard back to the KPC board. Sti...
by belzrebuth
Mon Apr 13, 2020 10:46 am
Forum: HELP!
Topic: Ensoniq SD-1 stuck at test mode (no boot)
Replies: 12
Views: 2486

Re: Ensoniq SD-1 stuck at test mode (no boot)

Okay some more updates: I resoldered almost every joint in the KPC board. I then connected it to the mainboard without the keyboard assembly attached. The synth reported a keyboard calibration error as expected BUT: I could now press "IGNORE" and guess what... It actually ignored the error and boote...
by belzrebuth
Mon Apr 13, 2020 8:45 am
Forum: HELP!
Topic: Ensoniq SD-1 stuck at test mode (no boot)
Replies: 12
Views: 2486

Re: Ensoniq SD-1 stuck at test mode (no boot)

On the SD-1, this normally would be done deliberately by bridging J11 (keyboard connector) pins 17 and 19. I'm wondering if you've somehow connected those two pins together when touching up soldering on that header, or when repairing the keyboard ribbon... something like that. But if pins 17 and 19...
by belzrebuth
Sun Apr 12, 2020 8:12 pm
Forum: HELP!
Topic: Ensoniq SD-1 stuck at test mode (no boot)
Replies: 12
Views: 2486

Re: Ensoniq SD-1 stuck at test mode (no boot)

It is indeed possible to change presets and get notes to play from midi. I can also see midi out data when I'm messing with the mod or the pitch wheel. So I think the DUART chip is indeed okay. I can't request SYSEX data or a bulk dump from the machine but sysex messages may be disabled. Of course, ...
by belzrebuth
Sat Apr 11, 2020 9:25 pm
Forum: HELP!
Topic: Ensoniq SD-1 stuck at test mode (no boot)
Replies: 12
Views: 2486

Re: Ensoniq SD-1 stuck at test mode (no boot)

After some more messing with it, resoldering some bad joints etc it booted up. Passes keyboard calibration and can trigger it via midi, sounds very nice too. BUT, It doesn't trigger via the keyboard and no button on the panel actually registers anything. Can't even perform a hard reset :shock: Any i...
by belzrebuth
Sat Apr 11, 2020 5:01 pm
Forum: HELP!
Topic: Ensoniq SD-1 stuck at test mode (no boot)
Replies: 12
Views: 2486

Ensoniq SD-1 stuck at test mode (no boot)

Hi, I've got an Ensoniq SD-1 which is in a very bad cosmetic state and (of course) stuck in the test mode. All keys are in a box cause the previous owner tried to clean them and never bothered to put them back so I have only the keyboard board, mainboard, psu and panel on my bench in order to try to...
by belzrebuth
Fri Apr 10, 2020 12:47 pm
Forum: Samplers
Topic: Iomega SCSI ZIP 100 with a CASIO FZ-20M
Replies: 4
Views: 2434

Iomega SCSI ZIP 100 with a CASIO FZ-20M

Has anyone used a ZIP drive with a FZ sampler?
I have one spare drive and was thinking to use it with my FZ but I haven't used the SCSI before so I wonder if there's anything (like scsi termination) that I need to consider.
Thanks.
by belzrebuth
Wed Apr 08, 2020 3:48 pm
Forum: HELP!
Topic: Casio FZ-20M stucks right after boot
Replies: 1
Views: 761

Re: Casio FZ-20M stucks right after boot

Ok, so I loaded a disk and after it loads up the play button lights up (instead of the modify) and I can trigger the sampler via midi. I get sound out of the outputs but the panel is still locked up. So my problem is not exactly that the sampler is freezed but more like it "locks" or even better not...
by belzrebuth
Wed Apr 08, 2020 1:36 pm
Forum: HELP!
Topic: Casio FZ-20M stucks right after boot
Replies: 1
Views: 761

Casio FZ-20M stucks right after boot

Hi, I've got a Casio FZ-20M which just right after it gets to the menu screen (after the FZ-20M logo) just freezes and does not respond to any keypresses. The modify button is constantly lit as well. The voltages seem okay and it seems to be recognising a gotek usb drive I've installed on it cause i...
by belzrebuth
Wed Apr 08, 2020 10:58 am
Forum: HELP!
Topic: Roland R8M dead LCD
Replies: 1
Views: 812

Roland R8M dead LCD

Hi, I've got a Roland R8M with a dead LCD (just displaying black squares). It's not the LCD module itself as I've already replaced it with a new one (I've built a new ribbon for it as well just in case). Anyone might have a clue what could be the culprit? I see the LCD data is coming straight out of...