Re: Dell u2312
Had to order some clips to hold my probes on whilst I was pressing the buttons so sorry for the delay.
I have 3.3v on the on/off button and when its pressed it goes down too 0v.
Jasgriff
Badcaps Veteran
Last Activity: 04-04-2013, 08:06 PM
Joined: 02-27-2012
Location: England
-
Re: Atten 858D review
Have you looked at the other video of him desoldering the Inverter straight after turning it off? Either way I would much prefer to stay well away from anything live.Leave a comment:
-
Re: Atten 858D review
I had a read of the Atten issue on the eevblog forum. That must have been a one off.
You do find some very good videos. I looked at the ones posted above and as always I it inspired me to find an old board and get the soldering iron out. Its strange how I seem to be able to desolder chips nice and easy when they are not important. But when I am concertrating on a chip that is important I tend to nearly mess it up.
The guy in the video scares me when he starts to touch parts of the tv and desolder just after turning it off. Looks...Leave a comment:
-
Re: Broken Trace
If the trace goes to the pin of the IC then it is definately do able. Make sure it definately does before soldering though.Leave a comment:
-
Re: Broken Trace
Hi, looking at you very first picture on the bottom of the power board before you changed the capictor it should not have been connected to that reistor. There doesnt seem to be a trace going to it at all. I think thix is where you issue is.Leave a comment:
-
Atten 858D review
Retiredcaps has got me into watching crazy dave's videos and I came across this. Looks like they only cost around £35 and they might come in hand for removing SMD IC's rather than trying to use the soldering iron all the time.
What do you think?
[URL="http://www.youtube.com/watch?v=vva2t21sOAs"]ATTEN 858D Review[/URL]Retiredcaps has got me into watching crazy dave's videos and I came across this. Looks like they only cost around £35 and they might come in hand for removing SMD IC's rather than trying to use the soldering iron all the time.
-
Re: Broken Trace
We need 2 new clear pictures of or the board after you have fitted the caps so that we can see whats going on and offer advice on what to test.Leave a comment:
-
Re: Dell u2312
The power LED doesnt come on at all.Leave a comment:
-
Re: Dell u2312
Right done a little measurements from P802 on the power supply which connects to the signal board.
PWM = 2.514v
EN = 0v
5v = 5.209v
5v = 5.209v
5v = 5.209v
GND = 5.209v
GND = 0v
5v = 0v
ENA = 0.0v
EN = 0.102v
5v = 5.209v
RTNA = 0.008v
DET = 0v
After looking at the markings and then trying to double check them as it didnt seem right I noticed that they have put the connector on back to front.
Has anyone ever seen this before?...Last edited by Jasgriff; 09-17-2012, 10:35 AM.Leave a comment:
-
Re: Dell u2312
Ok,
There were a number of fuses that seemed to be connected to the on board usb ports and the external ones. I checked them both and none were blown. I then reconnected the external usb's and tested for voltage again and still got nothing I also tried a usb stick with a light on in the on board and and external usb and that didn't have any sign off life either.
I am now thinking that there should be 5v's kicking about going into the usb's that maybe also fed the third voltage regulator?Leave a comment:
-
Re: Dell u2312
Right,
I301
N252
G1084-33
Pin 1 = 0v
Pin 2 = 3.345v
Pin 3 = 5.209v
I302
GTC
LD1117AG
12A010HUE
Pin 1 = 0v
Pin 2 = 1.205v
Pin 3 = 3.345v
I308
Dll1ib
17-33
Pin 1 = 0v
Pin 2 = 0v
Pin 3 = 0v
On the Fuses. I meant 0.2 Ohms again my mistake.
Looking at I308 it seems to be connected to the USB hub which this monitor has. I do recall someone on here mentioning that...Leave a comment:
-
Re: Dell u2312
Retiredcaps all valid points and again noted.
I did a little playing around with the monitor again this morning so I will write up my findings shortly along with some accurate readings....Leave a comment:
-
Re: Dell u2312
Yes there is a F301, F304 and F305 too they are all measuring 2 OhmsLeave a comment:
-
Re: Dell u2312
Im getting nothing at all on any pin of I308. There are a few SMD fuses on the board too which I have been testing none of which are blown so far.Leave a comment:
-
Re: Dell u2312
Right...
I301 = 3.3v
I302 = 2.1v
I308 = 0v
P306 is a ribbon connector that connects to the switch panel. There seems to be 3.3v present on some of those pins....Leave a comment:
-
Dell u2312
Hi,
Got one of these to fix yesterday. I havent looked at an LED one before so I need a little guidance.
The monitor when plugged in shows no sign of life at all. I have stripped it down and plugged in the power supply and mainboard without having the monitor connected. The big cap is showing 330v and there dows seem to be voltage getting to the mainboard as I quickly tested the voltage regulators. I havent checked to see if they are correct yet which will be my next step.
Pics are only quick ones and as its dark here I had to use the flash but hopefully... -
Re: Acer x221w
Yeah thinking about it if there was a cold joint or a poor connection then I suppose it could make that noise.
I will crack it back open and check that. I can try a different set of CCFL's on it at the same time I suppose.
The picture quality on the Acer is ok. I just want to get it running and out of the way to make some space.Leave a comment:
-
Re: Acer x221w
Hi All,
Not been on for a while. Hope all are well!
Had another one of these to fix. The monitor was fully lighting up one CCFL but the other was only half lit. I assumed that it was the same as all of the other versions of this that I have fixed and changed the inverter. On testing all CCFL's works and I put the monitor back together and it was working fine. I left it on for a while to make sure that all was ok but it seems to be making a buzzing noise?
I have a feeling that if I leave it on it will burn the inverter like what...Leave a comment:
-
Re: Need to replace some dead Samxon's in a Gateway 900G
Budm's comment would be all you need to really consider. Seen as you say your a noob at then I have provided links to the actual caps you need to order.
[URL="http://www.digikey.com/product-detail/en/EEU-FM1E471/P12388-ND/613749"]CAP ALUM 470UF 25V 20% RADIAL[/URL]
[URL="http://www.digikey.com/product-detail/en/EEU-FM1E221/P12383-ND/613744"]CAP ALUM 220UF 25V 20% RADIAL[/URL]
Not sure what your other caps are as they are not listed but most would change all as...Leave a comment:
-
Re: iiyama ProLite E2200WS
Tried the monitor this morning with the replaced switch board and all is working well. The menu isn't coming on all on its own any more. I am going to leave it on all day but it looks like its cured.Leave a comment:
No activity results to display
Leave a comment: