Oevia 252fhd-t11 DPS-408AP B power supply

[tom66]

Re: Oevia 252fhd-t11 DPS-408AP B power supply

So, with new meter, you have solid 24V going to inverters? Exactly what do you read?

[mcross]

Re: Oevia 252fhd-t11 DPS-408AP B power supply

Sorry for the late reply been busy. I am getting 24.4v to the inverters , VBL>4.7 ,VBRI> 3.5 and its stable, VLAMP is not used and theres no reading there.
mike

[budm]

Re: Oevia 252fhd-t11 DPS-408AP B power supply

VBL = BL_ON (Backlights ON)
VBRI = Dim (Backlights dimming control)
So Inverters need to be checked.

[mcross]

Re: Oevia 252fhd-t11 DPS-408AP B power supply

Will check the inverters, what should i look for?
Also on the main board , It has a @ U7 is a 1084 reg, it reads pin1=1.35
pin2=2.60
pin3=5.02
is this good or bad?
Mike

[tom66]

Re: Oevia 252fhd-t11 DPS-408AP B power supply

Can you post a picture of the inverter(s)?

[mcross]

Re: Oevia 252fhd-t11 DPS-408AP B power supply

Will do in a few mins

[mcross]

Re: Oevia 252fhd-t11 DPS-408AP B power supply

heres the invert pic's

[tom66]

Re: Oevia 252fhd-t11 DPS-408AP B power supply

There's usually a fuse on these marked "1A/76V", do you see one?

[mcross]

Re: Oevia 252fhd-t11 DPS-408AP B power supply

yes , tested good, all are good on all 4 boards

[mcross]

Re: Oevia 252fhd-t11 DPS-408AP B power supply

Sorry, made a bad reading on the master inverter fuse, was looking at the bigger white ones. on the master with meter set to 200k, get a slow climbing reading, the others on the slave boards read good no resistance
Mike

[tom66]

Re: Oevia 252fhd-t11 DPS-408AP B power supply

Great! The fuse is blown. It is a common fault. Replace it and it should work.

[mcross]

Re: Oevia 252fhd-t11 DPS-408AP B power supply

will do and let you know
mike

[mcross]

Re: Oevia 252fhd-t11 DPS-408AP B power supply

That did it Tom!
Thanks for the help, I have learned alot with this one. I have done about 20 tvs so far. I have a few to get to, may be back for you guys help. Thanks again
mike

[tom66]

Re: Oevia 252fhd-t11 DPS-408AP B power supply

Nice one. Thanks for the feedback too.

[budm]

Re: Oevia 252fhd-t11 DPS-408AP B power supply

Glad it was an easy fix, very common failure for CMO inverter board