AG Neovo E-17DA

[seanc]

Re: AG Neovo E-17DA

If you can work out where the pad connects to, you can run a jumper wire to the next component.

[sabre504]

Re: AG Neovo E-17DA

Tested tubes with another inverter board (trusty old xerox unit)
The screen flicked on and off again because i could not replace the
STU2040PL P channel transistor as the pad is trashed .
Just thought there may be a way to use another inverter to bypass the sense circuit using the wiring that is there

[retiredcaps]

Re: AG Neovo E-17DA

Even though the transistor is not in circuit suprisingly the screen flicked on then off so bulbs ok and vid card seems ok.

Now my question is if i work out which wires supply the inverter power and connected them to another inverter (universal one i have) do you think the sense circuit would still shut the monitor down

Yes the sense circuit could still shut the monitor down because the ccfl tubes or the wiring could be suspect. Your observation that the screen flicked on then off could indicate a dying ccfl tube or bad wiring.

[sabre504]

Re: AG Neovo E-17DA

Futher to earlier post i reassembled the unit after solering on some 4 amp fuse wire to the old fuses (not ideal i know) so i could try to measure voltages on the wiring.
Even though the transistor is not in circuit suprisingly the screen flicked on then off so bulbs ok and vid card seems ok.

Now my question is if i work out which wires supply the inverter power and connected them to another inverter (universal one i have) do you think the sense circuit would still shut the monitor down

Picture shows caps with power going to them

3 reds = 12v
1 yellow = 5v

[sabre504]

Re: AG Neovo E-17DA

Ah well got the parts i needed only to find when i started to change the blown part that it had taken out the track beneath .

Now think better off trying to find another inverter board than rescue this one ,but will keep it for parts that may be useful.
I have some universal inverters but i think wiring one of these in would be a pain as would have to get a 12v supply to it first, then sort the other wires.

Thanks for the help

[sabre504]

Re: AG Neovo E-17DA

Thats great thankyou have ordered them now just gotta find the right fuses
and change the caps

[jetadm123]

Re: AG Neovo E-17DA

Fairchild shows a FDD4243 as a possible substitute for the STU2040. And International Rectifier shows a IRF5305 as a sub for the FDD4243. There are differences in the current and Rds ratings, but the 20A the STU2040 is rated at is a bit of an extreme anyway.

[sabre504]

Hi need a bit of help if possible .
Have taken the inverter board from this AG Neovo E-17DA
only to find in picture one that someone has changed 2 of the caps for 63v 220uf whilst the others (still glued) are 25v 220uf Capxon.
I assume they should all be 220uf 25v 105c.
Also the 2 green fuses are blown so i need to change those.

Picture 2 is of the opposite side and this is where i need the help, one of the
transistors has burnt out (STU2040PL i have attached a datasheet )

I cant seem to find a match and was wondering if anyone else had dealt with one of these and knew of a match .

I have done searchs and checked lots of data sheets but there are so many variations i must admit i am getting a bit lost and until i can sort the power board i cant move on to test the rest of the monitor.

Any input i would be grateful