Core voltage regulator hot!!!!

Testing/Troubleshooting
1

I am using a 16vac power adaptor with my MBSID.  The sid voltage regulator is fine, but the core is getting hot.  Should I use a circuit with a 7809 to step down the power before going into the 7805, or should I just heatsink the 05 and let it be???

2

I am using a 16vac power adaptor with my MBSID.  The sid voltage regulator is fine, but the core is getting hot.  Should I use a circuit with a 7809 to step down the power before going into the 7805, or should I just heatsink the 05 and let it be???

3

Hi,

16Vac should be no problem for the regulator.

It is normal that the regulator is getting hot. If you can’t touch it - give it a heatsink.

If there are no further problems, you just can " let it be"

greets

Doc

4

Hi,

16Vac should be no problem for the regulator.

It is normal that the regulator is getting hot. If you can’t touch it - give it a heatsink.

If there are no further problems, you just can " let it be"

greets

Doc

5

Well, mine voltage regulator was also very hot ( not normal hot ). Problem was that a placed some IC’s on the DIN en DOUT board in the wrong way :frowning:

So they seem the work as a diode or something. So unplug everthing on your CORE module ( all the external modules voltage lines ) and check if that solves your problem. If it is, then there is certainly something wrong with the external modules.

6

Well, mine voltage regulator was also very hot ( not normal hot ). Problem was that a placed some IC’s on the DIN en DOUT board in the wrong way :frowning:

So they seem the work as a diode or something. So unplug everthing on your CORE module ( all the external modules voltage lines ) and check if that solves your problem. If it is, then there is certainly something wrong with the external modules.

7

no the voltage regulator runs fine when using smaller voltage.  Say 9vdc.  But when I use my 16vac to power the core and the SID is when I run into problems with the regulator getting hot.

8

no the voltage regulator runs fine when using smaller voltage.  Say 9vdc.  But when I use my 16vac to power the core and the SID is when I run into problems with the regulator getting hot.