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Author Topic: M-Unit Troubleshooting/Aux 2 flashing  (Read 1538 times)

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Offline Noah1981

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M-Unit Troubleshooting/Aux 2 flashing
« on: January 07, 2019, 01:17:28 PM »
Hello all, I got my ‘76 CB550f Back from the shop and there seems to be something wrong with the m-unit. The input side of Aux-2 is flashing, all other lights on the unit are off. There are also some times that the m-unit will not power up at all. Seems random. On the occasion that it does power up properly, I can use some buttons by just touching them and not actually pressing which leads me to believe it’s a grounding issue.. the answer to all this probably lies in knowing what a flashing Aux-2 means. Thanks in advance!
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Offline calj737

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Re: M-Unit Troubleshooting/Aux 2 flashing
« Reply #1 on: January 07, 2019, 01:42:50 PM »
Bad battery voltage or poor ground.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Noah1981

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Re: M-Unit Troubleshooting/Aux 2 flashing
« Reply #2 on: January 07, 2019, 01:45:23 PM »
Quote from: calj737 on January 07, 2019, 01:42:50 PM
Bad battery voltage or poor ground.

The battery reads 11.67. Too low?
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Offline calj737

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Re: M-Unit Troubleshooting/Aux 2 flashing
« Reply #3 on: January 07, 2019, 01:46:34 PM »
Way too low
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Noah1981

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Re: M-Unit Troubleshooting/Aux 2 flashing
« Reply #4 on: January 07, 2019, 01:50:09 PM »
Quote from: calj737 on January 07, 2019, 01:46:34 PM
Way too low

Thanks! Would that also explain the weird touch sensitivity on the switches?
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Offline calj737

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Re: M-Unit Troubleshooting/Aux 2 flashing
« Reply #5 on: January 07, 2019, 03:08:10 PM »
What buttons are you using? Some momentary buttons activate the MU differently with different push sequences. Press and hold, you get a function. Press and release, a different function from the same button.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Noah1981

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Re: M-Unit Troubleshooting/Aux 2 flashing
« Reply #6 on: January 07, 2019, 03:15:04 PM »
Quote from: calj737 on January 07, 2019, 03:08:10 PM
What buttons are you using? Some momentary buttons activate the MU differently with different push sequences. Press and hold, you get a function. Press and release, a different function from the same button.

A motone 3 button switch like this. It’s being activated/deactivated literally if I just touch it.

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Offline calj737

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Re: M-Unit Troubleshooting/Aux 2 flashing
« Reply #7 on: January 07, 2019, 03:52:45 PM »
Sounds like your wires behind the switch are loose. Probably need to carefully loosen the housing and check the wires. If they’re loose, they’ll constantly be activating functions on the MU and cause battery (or other) issues.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Noah1981

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Re: M-Unit Troubleshooting/Aux 2 flashing
« Reply #8 on: January 07, 2019, 04:09:42 PM »
That makes a ton of sense to me. Thanks for all your help.
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