RC Tank Warfare community hobby forum

Look at the recoil unit and test the contact relay, if it works (stops the cycling of the unit) then just glue a thin strip of plasticard against the metal portion of the unit where the relay switch makes contact.

AVATT wrote:Look at the recoil unit and test the contact relay, if it works (stops the cycling of the unit) then just glue a thin strip of plasticard against the metal portion of the unit where the relay switch makes contact.

Sounds like a reasonable piece of advice, Avatt, but it comes about eight years too late for Alan 123. Personally, considering that Tamiya Tank DMD units are now approaching the £200, I wouldn't be inclined to mix and match parts with one...especially the flash unit.
We had a thread here on the possibility of using non-Tamiya xenon flashes with a Tamiya DMD/MFU.
viewtopic.php?f=195&t=24792&p=232568&hi ... it#p232568

Yes knew late to need for Alan, but just in case he still has them or someone else has the same problem. Just went thru this and when I read here that it was a faulty DMD was gravely concerned. Fortunately toying with the recoil disclosed a simple fix. Cheers!

AVATT wrote:Yes knew late to need for Alan, but just in case he still has them or someone else has the same problem. Just went thru this and when I read here that it was a faulty DMD was gravely concerned. Fortunately toying with the recoil disclosed a simple fix. Cheers!

That reminds me, I have a photo somewhere of the printed circuit board in a DMD MFU -01. Must post it here. For anyone with a soldering iron, and a knowledge of PCBs, who happens to have a burned out resistor, or other component it could prove useful.

yes please do I would greatly appreciate access to that schematic

Basically the problem is that the board or the unit sends out a pulse to the recoil unit that is longer than the travel-time of the mechanical movement of the recoil unit. I fixed it with a small rubber ring that forces the recoil unit micro-switch to switch off after one pulse.

As promised. This is a peek inside a brand new Tamiya DMD MF-01 unit. (Fits: Tiger 1, King Tiger, and Panther) If you click on the pic, it should enlarge sufficiently to show more detail.

And another, for a closer look at the PCB layout: Couldn't get the focus absolutely spot on. I should have used my trusty old DSLR for that. Still, the pinouts are all labelled/ enumerated.

Thanks Much!