Hanns-G HH251 no power

[Davi.p]

Re: Hanns-G HH251 no power

Can you make me a new photo in the area that i've marked in yellow? It seems that something is not driving the mosfet you've photographed from near, also measure the 3 pins of the little transistor near the previous, the one that has a section with "D" shape from the up.

[selldoor]

Re: Hanns-G HH251 no power

Cant find a datasheet for BIT3501 looks like they can be got from BITEK.COM on application form.

Looking at the post with the three pictures - the last two at the right hand side
there are two solder joints that look bad - may be just the picture but better check

[maudam]

Re: Hanns-G HH251 no power

Tonight i was unable to test but looking around for data sheet i found something.
This is the description of bit3501:
High Efficiency ZVS CCFL Controller
http://www.amazon.com/Unknown-BIT3501/dp/B00DHCVY6W
http://it.utsource.net/ic-datasheet/...1-1873408.html

This is the link to a similar psu from delta which use same architecture.
Pdf in attach.


This other link is for a chinese supplier:
http://www.dzsc.com/product/infomati...121134131.html

[maudam]

Re: Hanns-G HH251 no power

Tomorrow i'll post pictures and other measurements.

[Davi.p]

Re: Hanns-G HH251 no power

Can you test JP113 well visible in third photo in post #15? In that post it seems that you shortcircuited 5.2v pin with gnd! ..

[devriestech]

Re: Hanns-G HH251 no power

Thank you for posting the schematic. I am using it to trouble-shoot a ViewSonic CCFL BIT3501 based Inverter PCB.