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**jetadm123** · 04-09-2012, 11:19 AM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

I would suggest measuring the voltage across the large 120uf 450V cap. Assuming your outlet voltage is 220VAC, then you should see approx 220V x 1.414 = 311 VDC across that cap.

**Jasgriff** · 04-09-2012, 11:31 AM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

As jet recommends above....

I would also check the fuses whilst your at it they are in positions

F850
F851
F852
F853

From what I can make out.

**Batz** · 04-09-2012, 11:34 AM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

Thanks for the super speedy replies. I'll test these and come back to you guys.

**Jasgriff** · 04-09-2012, 11:38 AM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

Make sure you test the fuses with the power off

**selldoor** · 04-09-2012, 11:53 AM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

Hi yes try as jetadm123 suggests.
I usually give newbies a bit more instruction:

For this test you need to just connect the power supply to the mains - no other boards - make sure the board isnt touching another board and that you are not working on a conductive surface.
ASK if unsure about anything - we have all been there.

These are high voltages so great care needed
Set your meter to 600vDC and put the black (negative) probe on the Negative leg of the the capacitor. Put the red (positive) probe on the positive leg of the capacitor. Do not hold the probes too near to the metal points.
Remember heat sinks can carry a voltage that will give you a nasty jolt.
If you have not used your meter for some time practice a bit on 9v battery 1.2v 1.5v a couple together etc so you get used to holding the probes and looking at the meter.

I notice there are 4 yes at least 4 fuses on the board. If you like you can practice with your meter on those.
Simple rule here Measure voltages = power on
Measure Resistance = power off ( for 5 mins)
Set meter on Ohms 200 if you can and with the power off just measure the fuses and post your findings - should be the same as touching the probes together. The fuses I have spotted are two red ones at the top left of the board (looking at your picture) and two at the bottom- One on right of power socket looks the same sort as the two at the top. The other is on the left of the power socket and is a red vertical cylinder shape. The board will have marking near them with F in it.

EDIT - Im just going to have to find shorter answers. or type a lot faster

**Batz** · 04-09-2012, 12:07 PM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

Cool, thanks for the extra help. I had actually already gone away and done the work but I am not a total newbie as I did Electronics O level at school 25+ years ago and I know the basics to not blow my fingers off

So anyway this is what I did, I removed the main board from the case and all connectors. Measured all the fuses. Switched off at the wall then plugged it in. Measured the capacitor. Switched off at the wall.

All fuses are measuring close to zero resistance.

The big capacitor is varying between 390V and 405V. I am in the UK so the wall should be between 220V and 240V I did try to measure across the kettle lead but didn't get anything meaningful, probably me prodding the wrong bits. Edit: I just remembered it will be AC not DC and I didn't switch over!! Edit again: I just realised that I think I first tried to measure the voltage on the big capacitor before turning the dial from Ohms to Volts and I've just checked the fuse in the back of the multimeter next to the batteries and it is blown. I am obviously more of a noob than I thought .... oops. Down to Maplin tomorrow then ...

I measured a few spots on the reverse of the board where it states GND and +12V or +24V or +5V and these seem to be varying all over the place. Maybe it's my measuring but I don't think so.

I am not sure about using my meter other than dial it to V to do Voltages or Ohms symbol for resistances! And of course put the probes in the right sockets for each job. I have attached a photo of it in case it helps.

Attached Files

**Jasgriff** · 04-09-2012, 12:19 PM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

Just noticed that you also have some Fuse resistors on that board too I think I could see 3 of them they would be worth a check.

You say that you measured some other voltages can you give us the actual readings of +12 +24 and + 5v.

**Batz** · 04-09-2012, 01:04 PM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

Since I blew the fuse I can't get a continuity test to work. If I hold the probes together then the scale just wanders. I have done a bit of google-reading to refresh my memory on how to use a multi meter and I'll get a replacement fuse for the meter tomorrow and test those fuse resistors, I presume they are the components with references starting FR ?

**Jasgriff** · 04-09-2012, 01:06 PM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

Yeah they start with FR. Does the resistance setting work? if so use that to test them.

**retiredcaps** · 04-09-2012, 02:34 PM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

Originally posted by Batz View Post

Hi all, first post so be gentle!

Well lit, clear focused non inline pictures, punctuation, paragraphs, a picture of your multimeter, sigh I wish more first posts were this good.

Did I mention a picture of the multimeter!!!!

**jetadm123** · 04-09-2012, 02:40 PM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

Originally posted by retiredcaps View Post

Did I mention a picture of the multimeter!!!!

Actually, the photo is on post #7

**Jasgriff** · 04-09-2012, 02:40 PM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

Lol,

I was going to mention that you would love the fact he has included a pic of his multimeter.

I think Retired was praising such a good first post and the fact that he did included his meter.

**retiredcaps** · 04-09-2012, 02:47 PM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

And now some value add. Service manual with a schematic of the power board on page 38.

Once you get your multimeter fixed, the schematic will help.

**Batz** · 04-10-2012, 02:21 AM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

Thanks for all the kind comments, I made sure I got decent photos, it was great that I happened to have time during the brief Edinburgh summer which this year seemed to fall for one week in March, it's now sleeting down outside ...

Great work getting the service manual, I did some googling for something like this but couldn't find anything.

I'll post back once I have fixed the meter which may not be today as I am looking after kids on Easter break and one of them is 'wuffing her custard' every so often (as my sister would describe it! AKA being sick).

**Batz** · 04-10-2012, 02:42 AM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

I can't find a download link on that page to actually download that service manual. Did you manage to get it downloaded?

**selldoor** · 04-10-2012, 02:48 AM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

Its a little bit tricky - you have to switch off any stuff like ad blockers or allow
them on that site then it can take up to a minute for the link to appear.
Its in black at the bottom right hand side - small writing tho - not the big green ones.

**Batz** · 04-10-2012, 03:06 AM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

OK, got that now, thanks for the tip, I had to turn off AdBlock.

Having a quick skim through the manual this is not quite the same as my monitor, the main board shown in the manual is quite different to mine. The pictures in the manual on page 32 show two boards where mine has one larger board. My monitor is actually a 2209WAf according to the serial number panel. Built in 2010.

Nevertheless it should be helpful as there are probably similar components and build methods.

**jetadm123** · 04-10-2012, 09:10 AM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

Originally posted by Batz View Post

OK, got that now, thanks for the tip, I had to turn off AdBlock.

Having a quick skim through the manual this is not quite the same as my monitor, the main board shown in the manual is quite different to mine. The pictures in the manual on page 32 show two boards where mine has one larger board. My monitor is actually a 2209WAf according to the serial number panel. Built in 2010.

Nevertheless it should be helpful as there are probably similar components and build methods.

Yes, I also took a quick look at the schematic and it is different from yours as it has it's power supply and logic boards separate. Whereas on yours, as you pointed out, everything is intergrated on one board. Just goes to show you how quicky they change power supplies on what essentially is the same model monitor.

**Batz** · 04-10-2012, 10:09 AM

Re: Dell 2209W - no power at all - stripped down but can't see anything obvious

I got a pack of fuses for the multimeter from Maplin and it seems to be working fine again.

OK, things don't look too good for this board. All the fuses and fuse-resistors are registering continuity (i.e. near zero ohms).

The voltages are really hard to measure because the multimeter is auto ranging and although it has an auto/manual button I can't figure out how to work it.

Anyway here are the readings, they are all rapidly wandering up and down within a period of a second or so:

+5V near C964 between 0 and 1 volt (0 and 1000mV)
+24V near F851 between 16 and 21 volts
+12V near F853 between 600mV and 1.6V

The big capacitor registers between 393V and 402V

Input voltage measures 244V AC

Hope this helps!

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