Author Topic: my control this the By pressing RT / LT alone help me please v1537  (Read 2980 times)

Offline Bruno Souza

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my control this By pressing RT / LT continuously even I do not By pressing please can someone help me since grateful ja
excuse the English 'm on google translator :beg: :beg: :beg: :help: :help: :help:
« Last Edit: September 02, 2016, 09:35:39 PM by Bruno Souza »
Bruno Souza

Offline Bejita

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Re: my control this the By pressing RT / LT alone help me please v1537
« Reply #1 on: June 30, 2018, 07:56:48 AM »
Somebody can help this problem, i have problem same like this (LT RT Not Working)

Offline RDC

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Re: my control this the By pressing RT / LT alone help me please v1537
« Reply #2 on: July 01, 2018, 01:56:30 AM »
Take the controller apart and make sure the Magnets are still on the Triggers.

You really need an Oscilloscope to see what is going on with the Hall Sensors there.

Make sure R39 and R42 are 100ohms.
Make sure C36 and C38 are not shorted.

U10 and U11

1 - VCC, 125Hz, 3.3v p/p
2 - OUT, 125Hz, ~1.5v not pulled, ~0.3v pulled
3 - GND

If U10 and U9 check bad, make sure U9 is working.

U9

1 - 125Hz Out, to Hall VCC
2 - GND
3 - 125Hz In, from MCU
4 - 3.3v

Screwing up is one of the best learning tools, so long as the only thing you're not learning is how to screw up.

Offline jvcr

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Re: my control this the By pressing RT / LT alone help me please v1537
« Reply #3 on: September 20, 2021, 02:28:07 AM »
Thanks to RDC. I will add:
On the model 1697, these capacitors are called differently. For example, C33. But the question is, why do they refuse?
« Last Edit: September 20, 2021, 02:32:38 AM by jvcr »

Offline RDC

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Re: my control this the By pressing RT / LT alone help me please v1537
« Reply #4 on: September 20, 2021, 02:49:42 AM »
The above mentioned Caps are the same on the 1697. C32, C33, C35 and C37 are on the VDD rail for the Hall Sensors, and any of them shorted means both U10 and U11 would get no power and LT/RT both would fail, also the same setup as the 1537.

Caps fail due to age, stress (from installing or use), manufacturing defect or just because you held your tongue at the wrong angle while not even thinking about it doing it's job in there on that rail that is turned on/off 125 times a second. ;)
Screwing up is one of the best learning tools, so long as the only thing you're not learning is how to screw up.

 

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