Ich habe Probleme, meine MMIV, LCD bekommen und HG440 der Arbeit an meinem München Bord. Ich kann es bekommen meine 32-Bit-Lyon-Adaptermodul arbeiten mit, aber ich kann nur zwei Modulschächte , so dass keine LCD oder HG440 verwenden. Wenn ich eine geregelte 5-Volt verwenden, Netz 1500mA Adapter (ANSMANN APS 1500) es für ein paar Züge ok funktioniert, dann geht drunter und drüber und Pannen aus der Platte ein und Modul unuseable werden.

Hat jemand wissen, ob es möglich ist, die MMIV, LCD und HG440 arbeitet an einem Muchen Bord zu bekommen? 5 Volt beträgt die richtige Spannung geregelt? Kann jemand auch Anleitungen posten oder einen Link auf, wie die interne Spannungsregelung Änderung zu tun?

I'm having trouble getting my MMIV, LCD and HG440 working on my Munchen board. I can get it to work using my 32-bit Lyon adaptor module but I can only use two module bays so no LCD or HG440. When I use a regulated 5 volt, 1500mA mains adaptor it works ok for a few moves then goes haywire and glitches out and the board and module become un-useable.

Does anyone know if it is possible to get the MMIV, LCD and HG440 working on a muchen board? Is 5 volts regulated the correct voltage? Can someone also post instructions or a link on how to do the internal voltage regulation modification?

It seems to be a problem with voltage (because everything is fine with Lyon adapter module).

I'm not sure whether München "S" boards exist... But I think: no.

That's why I guess the problem is with the external voltage of 5V. You should use a power adapter which delivers 8-9 Volt or more. Inside the München board there is a 5V voltage regulation unit. It can not work with 5V from external plug because it needs a voltage difference of minimum 1V to control the voltage of the modules...

"Plus" has to be inside the plug! And "minus" is outside. HGN 5001 or something like that is fine. It doesn't has to be regulated.

Sorry, I was wrong. München S exist!

So, please, check first what type of München board it is.

If it is an "S" type you can slightly increase voltage of the extern power adaptor. The reason is a power drop of 0,5 V (it depends on power consumption of the modules) inside the chess board in result of (too) weak power cables...

Otherwise see above: simply use 8V adaptor.

Yes mine is a Munchen-S board.

I believe I tried up to 9 volts with the same problem but will try again. People tell me not to go above 5V with this kind of set-up (Munchen&MMIV) but MMIV on Exclusive needed 8V ...

Thanks

That's because a normal Exclusive board has a built-in voltage regulator, which the Muenchen S does not have. 9 V are too much for it; many Risc-modules (also without regulator) have been accidentally roasted with that voltage. They were delivered with a special 5 Volt adaptor, the HGN5050.

I guess, 5,5 or max. 6 V could work...

best regards,
Robert

If it is an "S" then 8V will be too high! Try 5,5V or a maximum of 6V...

Do you have the possibility to check the voltage on the extern power adaptor during the München board is working?

A pragmatical idea would be to integrate the HG440 Eprom into the MM IV module and play with Lyon power adaptor module. But this would be only a workaround and not a real solution.

Hallo Robert, Du warst einen Tick schneller, aber was für eine Einigkeit bzgl. der Spannung 5,5-6V.

I just checked my mains adaptor it spits out 5.68 Volts on the 5V setting. It still seems to need more Volts. The LCD is quite faint and the chirping sounds are a little weak compared to when using the adaptor module. It worked ok up until the fourth out of book move each time (two occasions). The first time the machine reset back to the starting position and Level 1, the second time the LEDs went crazy with lots of LEDs stuck "on" but very faint. It seemed to work best with just the MMIV and display modules. When using all three I didn't have much luck also when just using the MMIV it didn't want to work either.

While the Risc modules may fry at a little over 5V is there any chance MMIV/MMV are OK to 8 or 9V?

Also is there any chance faulty circuitry inside the Munchen board could cause this kind of problem? The ribbon type cable near the power jack seemed a little old and stiff when I opened it up to replace some reed switches...

Danke

No sorry I'm not confident to check the voltage while the Munchen is running. I'd be looking to sell the Lyon Modul set once the MMIV is running on the Munchen so not a suitable solution.

Don't go on more than 6V!

Lyon Adaptor module, MM IV and HG440 are running fine? (In this combination?)

Yes, the problem could be inside the München board. It could be a weak power cable (ribbon type) or a loose connection or slack joint. To check this, you could open one of the modules (I would prefer HG440) and measure the voltage with a multimeter (Pin 14 and Pin 28 on the EPROM chip).

Have you tried another board?