Hbl htv-160c1

[budm]

Re: Hbl htv-160c1

BTW, you may want to read the PDF, your circuit uses fullwave bridge without fiktering cap so you will know what expected voltage reading should be. Is your new meter True R.M.S?

[momaka]

Re: Hbl htv-160c1

Probably a long shot here, but I looked at the bottom side pictures again, and some of the joints look very very cloudy and could possibly have micro-cracks. Since these things tend to run miserably hot, I suggest reflowing all of the joints just for piece of mind.

Also, when I fixed my inverter, I tested it with a single 12V light bulb. So I'm thinking, doesn't this thing need a minimum load to oscillate properly?

[3d0]

Re: Hbl htv-160c1

Is your new meter True R.M.S?

No, I wish it was. Could that somehow explain the readings on my previous dmm?

Thanks for the link, I enjoyed reading it. Simple enough for me to understand & the illustrations are great.

[3d0]

Re: Hbl htv-160c1

Probably a long shot here, but I looked at the bottom side pictures again, and some of the joints look very very cloudy and could possibly have micro-cracks. Since these things tend to run miserably hot, I suggest reflowing all of the joints just for piece of mind.

Also, when I fixed my inverter, I tested it with a single 12V light bulb. So I'm thinking, doesn't this thing need a minimum load to oscillate properly?

Yes, the soldering is bad, cant really tell from the pictures. Lot's of small cracks on the joints.
Not sure about the minimum load, it could be possible. I'll try it after testing the diodes, resistors etc. something had to go wrong.