I had just recieved a Bowser M630 with Lok V5. I switched the horn CV’s and cycled through all 14 options. After a misclick on my MRC tech 6, the CV’s refuse to change, but everything functions normally. Resetting the decoder hasnt worked either, is the issue in the controller or the engine?
I’m not at all familiar with the MRC tech 6. Did you happen to put a value in CV 15 or 16 by chance?
Pete.
Also check the settings on CVs 31 and 32. You need to verify the correct settings with a manual from Bowser or the Loksound5DCC manual.
MRC Tech 6 should reset the decoder if you select Shift 9 9. Unless you accidentally locked the decoder.
https://dccwiki.com/Decoder_Programming_Lock
Scroll down to the ESU specific lock/unlock which also involves CV 124. ESU decoders are supplied with lock/unlock disabled in CV124.
If you write a value of 8 into CV 8 the decoder must reset to default unless it is locked somehow. You may need to power off and power on the locomotive after entering 8 into CV8.
Decoder lock and unlock are CV15 and CV16. Both should be set to zero to unlock the decoder, I believe, but it’s not in the manual for some reason, least not that I can find:
https://www.esu.eu/en/downloads/instruction-manuals/digital-decoders/
MRC Tech 6 manual:
http://www.modelrectifier.com/v/vspfiles/resources/dc-ac/0001200_Tech6_WEB.pdf
Tech 6 has many virtues but programming ain’t one of them. You need a clear picture in your head of what you are changing and to what because Tech 6 will not read CV values. Easy to lose your way when programming using the Tech 6. The handheld add on throttle (adds five more address slots and an LCD screen) helps a bit because at least you can read the numbers as you enter them. But once entered you cannot read them back to check.
If I forget what I’ve just done I always reset the decoder and begin again. If you go very far afield I’d recommend you write down the CV entries you intend to make in a list before you begin. Or just use decoder pro.
[#welcome] to the forum, your posts are delayed in moderation for a while.
Usually bricked decoders don’t work and can’t be programmed. You do need to cycle the power after a reset.
In cases like this what will help is a fresh CV file (~140 kB in size; CV file is not Sound file 10-20 MB in size), which you can request from the manufacturer for free. Resetting CV8=8 in the ESU decoder doesn’t restore all problems with incorrect programming.