Honeywell Galaxy G2 low voltage problem

[galaxy_owner]

Fuse F1 is the battery fuse have you checked this fuse isn't blown

Yes, checked that first, it's working fine, thanks

 

[galaxy_owner]

no.that's a capacitor and be a good idea to replaceit. the part i refer tois screwed onto that aluminium heat sink. it should get fairly warm in use.

thanks telectrix, you mean this part below?

 

[telectrix]

thanks telectrix, you mean this part below?

yep.youmay have to do some searching to find out what device it is. try cpc farnell. a quick test would be to measure resistances between the 3 legs. diode tests with multimeter should show a couple of 0.6V.

 

[Avo Mk8]

As above ^^^^
Seems to be a LM317T voltage regulator

https://cpc.farnell.com/stmicroelectronics/lm317t/v-reg-adj-1-2-37v-to-220-3-317/dp/SC08260?st=lm317t

 

[Avo Mk8]

i reckon that semiconductor (thryristor?) is goosed. cpc farnell do suchbeasts for less than a pint of ale. worth a punt.

Certainly is less than a pint of ale at 28p

 

[DPG]

As above ^^^^
Seems to be a LM317T voltage regulator

https://cpc.farnell.com/stmicroelectronics/lm317t/v-reg-adj-1-2-37v-to-220-3-317/dp/SC08260?st=lm317t

Classic 3 terminal voltage regulator. Used many of those.

 

[galaxy_owner]

Hi all, just an update. I ordered the LM317T voltage regulator and also a replacement capacitor. I replaced the voltage regulator first. That has solved the low voltage to the Aux and Battery charging cable (both are now just above 13v DC). However, the keypad is not working, the screen is blank and every 15-20seconds it beeps, but the screen remains blank. I have charged the 7ah battery and tested it before powering up the alarm with it plugged in.

I then replaced the Capacitor on the PCB, but that doesn't make any difference. So now i'm stuck again. Not sure what else to try.

Note, before I replaced the voltage regulator I fully charged the battery and plugged it in and the alarm did work for a few hours (as it was being fully powered by the battery). So I know the battery is ok. So it's only after I replaced the voltage regulator that has led to this specific issue.

Any suggestions would be much appreciated.

Thanks

 

[DPG]

Going to be difficult diagnosing this remotely I think.

 

[buzzlightyear]

I then replaced the Capacitor on the PCB, but that doesn't make any difference. So now i'm stuck again. Not sure what else to try.

New system will solve it.

 

[UNG]

Have you checked that you have got power at the keypad