Emulator II not booting

[Andras]

Dear All,

A friend of mine has got a fully renovated Emulator II equipped with a Lotharek HxC2001 Rev F. The drive was working when he got his hands on it but as the renovation work has been completed it was no longer the case. Then the drive itself has been tested in another Emulator II and it was functioning well, at least the engineer told us when he gave back the whole stuff. The engineer ran out of ideas what the problem could be, seemingly all hardware components in the Emulator II are ok, memory test is running with no fault found. The current status is that the drive somehow communicates with the Emulator but loading of system or sample files does not start. The only file we could run from the drive is the memory test (which as I wrote is running perfectly). That also means booting of Emulator is not starting. We tried different revisions (2.1, 3.1) and on Emulator side the respective revision was displayed correctly however further then the loading got stuck.

We used the files downloaded from here:

https://hxc2001.com/download/floppy_drive_emulator/QuickInstall_FloppyDiskImages.zip

So, at this point we are not sure what and where the issue could be (drive and/or Emulator).
You can check the case in this short video:

http://gofile.me/5NJj4/NHcBNqB5F
password: emulator

Please, help us with your expert comments. Thank you in advance.

Andras

[Wolfram]

Hello Andras,

check the EPROMS. Maybe you ned to burn them again.
Be sure you have the right main EPROM. The HD main EPROM will only work on an EII HD.

[Andras]

Thanks for the tip, will give it a try. Just orderd a set of new eproms.

[Andras]

New EPROMs were installed however the issue is still present. Any further idea is welcome.

[andyfox]

Hello, did you trying checking the floppy cable? Is it damaged ? in reality this should not be the problem since the memory test HFE is loading. Anyway, are you sure the diskette (HFE) you are loading worked before? Be sure that the disk contains the 3.1 OS requested. It seems your Emu is waiting for the OS.

Andy

[Andras]

Hi Andy,
Thanks for the comment. Floppy ribbon has been swapped as well, still not working. We got a reasonable offer from Germany for thoroughly checking and repairing the Emu.
I will get back with the findings.
Cheers,
Andr

[dfiorucci]

Read my post on EII won't boot.
Check the values of the pitch and mod wheel pots if they are out of range they will damage IC27 which will cause it not to boot.
If the pots are out of range you will need to adjust their values first then replace IC27.
It took me almost 2 months to track this issue down with mine.