Re: DELL 2007wfp - 2 Secs to black w/flickering
yes, all i did was changing the inverter and it was ready. its running perfectly.
thanks again LAS
Armandorf
Member
Last Activity: 10-05-2012, 11:22 AM
Joined: 03-10-2012
Location: Buenos Aires
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Re: DELL 2007wfp - 2 Secs to black w/flickering
i have to thank publicly to LAS, a user of this forum , who offered me his inverter(and some boards more) from his failed repair(he had a 2007wfp with the logic deaed)
He mailed the package from USA to Argentina.it arrived flawessly, and he was very kind with my doubts about shipping even after he send it.
Thanks to all of you, whom have helped in the process.
I could not brought my monitor back to live alone.Leave a comment:
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Re: DELL 2007wfp - 2 Secs to black w/flickering
Im moving my stuff to other place so till tuesday im stuck.
later I will desolder the new transformer
at first I thought that a faulty ccfll overcharged the transformer with that ccfl. but they glow. probably is the inverter only.
finding an inverter board complete can be the solution.Leave a comment:
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Re: DELL 2007wfp - 2 Secs to black w/flickering
yes the damage is only in the cover, i did it when i removed the old transformer that had an open winding, i dont have a good transformer out of the board, but i can desolder one of the other two original transformers.
comparing readings in the board without desoldering:
1st original 0.03ohm
2nd original(middle)0.04ohm
3st new open, infinite resistance
i believe the originals have 0.8ohm in each winding becuase:
middle pins are joined in the board. i suppose that the board is...Last edited by Armandorf; 07-26-2012, 04:11 PM.Leave a comment:
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Re: DELL 2007wfp - 2 Secs to black w/flickering
4001Rxxxxxxxx is the type i need? i have wasted so many time, at least i ve learnedLeave a comment:
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Re: DELL 2007wfp - 2 Secs to black w/flickering
i measured p1to p2 and p3 to p4. both readings marks open
i read that the 4001 was the important part of the transformer, i have a wrong transformer? i cant find the exact model en ebay...Leave a comment:
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Re: DELL 2007wfp - 2 Secs to black w/flickering
what do you mean with low ohm readings? in which pins I should measure?
in the pcb the 2 central pins of each side are joinedLeave a comment:
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Re: DELL 2007wfp - 2 Secs to black w/flickering
yes, the readings were 1.054K and 1.055K, and the readings in this transformer are equal to the other two.
looking the power supply, i searched for bad diodes or smd transistor shorted(continuity test)
and found something
i have 19.2v dc
an other 3 pins with 3.3v, 0,8v , 0v(it seems 2,5 mV with the tester in 200mV scale)
the last pin has no voltage but it doesnt seem grounded(continuity test with chassis marks open)
posted an edited pic of the solder layer for...Leave a comment:
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Re: DELL 2007wfp - 2 Secs to black w/flickering
yesterday arrived the transformer. it had SMD pins, so i put short wires(ends of used caps or resistences), soldered and mounted the transformer on the inverter.
i tested
but i still have the same problem; it flashes very quickly and i can see the [ No signal OSD] for a fraction of a second
i re checked the 6 ccfl´s with an inverter from a Lg 19'' and they flash once,1 second off, and lit on again, this time with an increasing brightness during the first 3 seconds .finally they still hang on with no...Leave a comment:
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Re: DELL 2007wfp - 2 Secs to black w/flickering
sorry i abandoned this thread for a long long time, thanks for the help, and i hope that this photos and information to be helpful in the future.
i had many issues with my mailing from china ebay, hopefully in 3 weeks will be arriving the little transformer.
if anyone needs a photo of some board of the
monitor i can post it.Leave a comment:
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Re: DELL 2007wfp - 2 Secs to black w/flickering
thanks for the information,
what about the tubes, theres a slight blackness in the ends, should they work a couple of years more?
im desoldering the transformer to see it from the other side, luckili it can be open near the pin.
im a bit nervous about shopping from ebay to argentina, i will research.
also tested other components all readings qhere equal with the other pair of transformers. did the same for mosfets on usb board
in the logic board, i find the caps slightly...Leave a comment:
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Re: DELL 2007wfp - 2 Secs to black w/flickering
transformers readings, pins numbered as described in attachment.
with the tranformers mounted in the board.( no need for desoldering?)
DMM set in the closest scale, in this case 2K ohm
[B]1rst transf.- [/B]
average resistance 1.062K-
1%= 10.62 ohms
1-8 resistance: 1.061 K (deviation -0.16%)
4-5 resistance: 1.063 K (deviation +0.16%)
[B]
2nd transf[/B]
average 1.0665K
1%=10.66 ohms
1-8 resistance: 1.064 K( - 0.21%)...Last edited by Armandorf; 03-15-2012, 01:50 PM.Leave a comment:
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Re: DELL 2007wfp - 2 Secs to black w/flickering
tubes photos,
i have another monitor, LG with a broken panel, so i have a test inveersor and tubes,no?
its a 19 screen, its compatible to test dell tubes with the LG?.
here i found a lot of infomation, great forum, keep it up...Leave a comment:
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DELL 2007wfp - 2 Secs to black w/flickering
Hi,i bought this monitor in late 2009, used,its from 2007.
im a happy owner since then.
lt has never been too bright, so i used the brightness at 66-100
doing that result in a whine(high frecuency sound). so i tried to use it at 50, just for precaution.
for 2 years no problems
A week ago, after using mi monitor for a couple of hours,i moved it to my desk(it was in a chair) and get out.
several hours later i power on and the image lasted 1 minute. then no backlight(but stayed gren light on)
if i unplugged it and waited a bit,...
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