Hans G HH251 - 3 seconds to Black

[cholzberger]

Hi,

i found a blown Fuse on my powersupply can someone tell me which fuse to use to exchange F102 in the Attached Picture?

The Label on the Board says its an Delta DAC-12M070 AF Rev 00A

[leapius]

Re: Hans G HH251 - 3 seconds to Black

I'm not sure of the answer to your question but you shouldn't assume that this will fix the problem. Something caused the fuse to blow and it is highly unlikely to be a power surge from the mains that did it. There will most probably some failed component(s) on the board that caused it to blow.

[cholzberger]

Re: Hans G HH251 - 3 seconds to Black

Hey,

i bet it was me causing the fuse to blow while i was trying to fix the 3 seconds to black problem.

[ben7]

Re: Hans G HH251 - 3 seconds to Black

Hey,

i bet it was me causing the fuse to blow while i was trying to fix the 3 seconds to black problem.

Might not have been. The 3 seconds to black is almost always an issue with the backlight inverter. It could have burnt out the fuse.

Check to see if the secondaries of the backlight transformers have any resistance, if one doesn't, then it is bad.

Hope this helps ye,

-Ben

[Rtech]

Re: Hans G HH251 - 3 seconds to Black

The 'Y' on my list is 5amp..BUT suspect there a lot more wrong with it than that,suggest you add photos of top and bottom of the Board !!

[cholzberger]

Re: Hans G HH251 - 3 seconds to Black

nevertheless i have to replace that fuse at some point in time
and i have no idea which one to order

[cholzberger]

Re: Hans G HH251 - 3 seconds to Black

Top and Bottom of the Board attached

i dont know which are the secondarys on this transformators?

[ben7]

Re: Hans G HH251 - 3 seconds to Black

These points.

[cholzberger]

Re: Hans G HH251 - 3 seconds to Black

Ok,
both measure 530 Ohms

[Rtech]

Re: Hans G HH251 - 3 seconds to Black

The fuse goes onto a connector ??? does it say on the Board what voltage is supposed to be on there ???

[cholzberger]

Re: Hans G HH251 - 3 seconds to Black

Yes the Fuse does go to the connector cable between logic board and power supply. i guess its 5.2 V.

[budm]

Re: Hans G HH251 - 3 seconds to Black

Take the resistance reading on the output side of the fuse and the circuit ground that feeds the main board to see if it has really low resistance.

[cholzberger]

Re: Hans G HH251 - 3 seconds to Black

Ok i replaced the Fuse, now i have another problem, the monitor stays on for a while, then goes of after a few seconds, the higher i set the brightness the shorter the time to poweroff will be.

any suggestions on this one?

[Rtech]

Re: Hans G HH251 - 3 seconds to Black

Looks like you are now in the '2 secs to Black' mode, so folllow the instruction for that,and see how you go ?/

[cholzberger]

Re: Hans G HH251 - 3 seconds to Black

ok, i located an bad ccfl,... wonder where to buy 25" ccfls?!

[leapius]

Re: Hans G HH251 - 3 seconds to Black

http://www.ccflwarehouse.com/

[leov]

Re: Hans G HH251 - 3 seconds to Black

ok, i located an bad ccfl,... wonder where to buy 25" ccfls?!

Which one was it? I think I have the same problem in my monitor. I hear the clicking sound, but I cannot point out which ccfl is bad

[Rtech]

Re: Hans G HH251 - 3 seconds to Black

As heat rises ,I normally check the top set first.