Re: Dell UltraSharp 2007Fp 2nd problem
Thank You “dicky96” for noticing my keen interest.
I will look at the video at the link you provided.
I will be repairing these 2 boards till I fix them or till I destroy them.
I will eventually come back and let every one know if I found the problem.
Thank you all, for your help.
Radek
Member
Last Activity: 06-18-2023, 05:30 PM
Joined: 03-12-2016
Location: Sidney
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Re: Dell UltraSharp 2007Fp 2nd problem
While waiting for the parts, I stumbled on all 4 boards on eBay. So I ordered them all.
Finally I got a chance to replace 3 Mosfeds, ZD701 Zener, replaced FD3 and FD4 previously. Applied 19 Volts to the board and still did not get 3.3V and 12V where expected.
So I plugged all the boards tougheter and connected to monitor. Nothing.
Looks like job for rainy day.
Since I was tired of the mess, I installed the new USB board from eBay, still nothing.
Then I installed the used Logic board...Leave a comment:
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Re: Dell UltraSharp 2007Fp 2nd problem
Thanks nomaka.
Received all my parts, but unable to do anything due to my regular job interference.
I ordered all caps and will replace them as per your suggestion.
I will keep everyone informed as I go.
Thank You All.Leave a comment:
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Re: Dell UltraSharp 2007Fp 2nd problem
Thank you for the guidance and coming back to answer.
Great learning curve. Watched video on YouTube how to remove the MOSFET.
It looked much easier in the video clip.
Anyhow, removed the Q9 MOSFET for 12V as I figured if I bugger that one all I am loosing is speaker power. Laid it out on a paper (courtesy of YouTube) and tested.
[url]https://www.youtube.com/watch?v=mHpY_3tzJTc[/url]
Did 4 tests and it looked like failed the #3 test not switching “ON”.
So now I will order some of the 2SJ590 and...Leave a comment:
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Re: Dell UltraSharp 2007Fp 2nd problem
Valuable info from member "budm" should help me figure it out.
3) The 19v is also fed (J4) the USB Hub/3 Buck converter regulators (3.3V (Q6) for the Logic board where the VGA/DVI, control panel are, 5V (Q14) (this 5V is also fed into 3.3V linear regulator for the USB interface IC) for the 4-port USB hub (these 4 USB ports are protected by 4 fuses), 12V (Q9) for the powered speaker bar DC output jack. This 19V is fed through 3A fuse. MOSFETs Q6, 9, and 14 are 2SJ598, P-Channel.Leave a comment:
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Re: Dell UltraSharp 2007Fp 2nd problem
After I removed the zener diode, I powered on the board with 19V from the power supply.
New fuse did not blow. That is a good news. Some progress anyway.
Now the bad news is 3.3V reads 19V, 5V read 5V so that is OK and 12V reads Zero.
So that leaves me with identifying two bad components to get 3.3V and 12V. Not to be concerned about the 12V as I understand this is only for the speaker, but I will try to fix it anyway.
Back to the reading. If anybody can pinpoint this issue the better.Leave a comment:
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Re: Dell UltraSharp 2007Fp 2nd problem
Thanks for the reply.
Could not see any writing with my 30x loupe. I will see if I can get anything locally with 3.6V. Should I be concerned with Watt rating? I know it is only for spikes, so it will likely not need some huge capacity, but I am not experienced enough to judge.Last edited by Radek; 02-23-2019, 06:07 PM.Leave a comment:
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Re: Dell UltraSharp 2007Fp 2nd problem
I unsoldered the zener diode ZD701. It is located just beside the 3 A fuse with my soldered on ugly big wires.
Diode is shorted according my ohm meter.
So I have looked for at least an hour over this forum and I am unable to find the rating so I can purchase one. All I found is one end has 3.3V and other goes to ground.
Can anyone please give me some numbers for this diode??Last edited by Radek; 02-22-2019, 11:48 PM.Leave a comment:
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Re: Dell UltraSharp 2007Fp 2nd problem
Thank you. I am at work now. So I will get to it later.
I located the ZD701 and have to figure out how to test it, if I have to unsolder it or not, I am sure the answer is here somewhere as I was reading about the ZD here.
Mosfets, I think I located 4 of them on this board as I have it with me but will be able to look at this forum better when I get home. Need to figure out how to test them.
Thank again for pointing me in the right direction, appreciate your help very much.Leave a comment:
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Re: Dell UltraSharp 2007Fp 2nd problem
Not a good report.
Replaced pair of diodes FD3 and FD4 with new.
Did not like my large 2.7K resistor so I replaced that one as well.
Plugged it all tougheter and same thing 3A fuse blew.
Tried again with spare 3.5A fuse blew again.
Put back 3A new fuse and left the board by it’s self no other board connected.
Pulled up my adjustable power supply and fed 19V and the Ground to the respective pins
on the board, thinking maybe the short is in other boards....Leave a comment:
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Re: Dell UltraSharp 2007Fp 2nd problem
Thanks for the enlightenment. FD3 and FD4 is all I needed, to wake up.Leave a comment:
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Re: Dell UltraSharp 2007Fp 2nd problem
One more measurement. Fuse to Ground short 1.5 Ohm.Leave a comment:
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Dell UltraSharp 2007Fp 2nd problem
I have Dell UltraSharp 2007Fp panel Rev A05 built Sept. 2008. I have successfully repaired this monitor couple of years ago by soldering open resistor. See attached photos.
No green or amber light when turned on. Nothing.
There is few threads going, but I am starting a new one as I understand this is the forum etiquette. Pardon me if I am wrong.
I removed all 4 boards and connected them tougheter. I found 19Volts going to USB board. Checked for 3.3Volt 5 Volt and 12Volt. Nothing. Rechecked previously installed resistor, all good there. Discovered 3Amp fuse... -
Re: Dell 2007FPB teardown
Thank you all, Could not have done it without you
Yesterday afternoon and half a night was well spent. Ordered power supply from eBay for my 2007FPb 1200x1600 monitor, but that was a $40 bust. That was not it. Combing internet and
Finding Badcaps, measuring values on four boards components, I came across the defective resistor. Found 2.7K resistor in my parts supply and soldered it in. not the prettiest soldering job, but guess what it works.
Cheers,
Radek...Leave a comment:
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Re: New Members - please post your introductions here
Hi Everyone, My name is Radek.
Found the badcaps very informative and helpful on many occasions. Finally decided to join. Thank you all for valuable information.Leave a comment:
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