Re: Dell E173FPf
Since I hadn't yet said it, thanks to all for your help.
goofy173
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Last Activity: 10-14-2014, 11:36 AM
Joined: 10-07-2010
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Re: Dell E173FPf
I did tear it down to just the lamps. Just connecting the C cables to the lamps, one side of the lamps are lit, the other side is dark, on all 4 horizontal lamps.Leave a comment:
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Re: Dell E173FPf
Ya. a schematic would be good. I think I'll just stick this stuff back on the shelf for a later date.Leave a comment:
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Re: Dell E173FPf
Power Supply = 12.19 VDC
On the capacitors, I don't see any series numbers. Here's all that's on them:
ICC
220uF
25 v
The other's the same, except 50 v.
We make pharmaceutical instruments. These may have been from a very large bulk order at some time.Last edited by goofy173; 10-14-2010, 01:54 PM.Leave a comment:
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Re: Dell E173FPf
OK on the MOSFET. Early in posting I had put that it was a MOSFET but I looked it up and thought it said it was a Schottky.
When I did check the brightness and contrast and turned them both up. The brightness would only go up to around 86 before the lamps shut off.
Where do I measure the output voltages of the power supply?
Not sure of the mounting of the lamps. Haven't had it far enough apart to see. I just assumed they were vertical because of the left side being dark.
I reversed the CN connections and...Leave a comment:
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Re: Dell E173FPf
Let's just talk about 1 monitor. That's all I want to get out of this.
The Lamps are dim. The left side more-so than the right.
I've replace a blown Schottky diode (Q850) as there was no lighting on this monitor originally. So then I replace the 2-220 µf caps (only had axial so they fit weird) with new ones, but it did not change the brightness level.Last edited by goofy173; 10-13-2010, 01:25 PM.Leave a comment:
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Re: Dell E173FPf
OK. Here we go....Leave a comment:
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Re: Dell E173FPf
Forgot the camera today. Try again tomorrow.Leave a comment:
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Re: Dell E173FPf
and the replacement caps I used were ICC, International Components Corporation Brand. One is a 50 volt and the other is a 25 volt: Stuff I had laying around.Leave a comment:
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Re: Dell E173FPf
1. Originally the lamps weren't lighting. I replace that Q850 which looks to be a Shottky Diode and now either LCD panel lights up nearly the same as the other.
2. I'll have to bring my camera from home, into work. My cell phone is the best we've got here which is only 2 meg pixel.
3. That is a very small chip. Numbers are hard to read but what I see is:
OZ9RRAG
4. I covered the Q850 in #1. You had asked the about the brand of caps. They are the same 220 µf but higher voltage, which I know makes no difference.
...Last edited by goofy173; 10-11-2010, 09:29 AM.Leave a comment:
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Re: Dell E173FPf
Try these pics again....Leave a comment:
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Re: Dell E173FPf
Thought the pics disappeared. Bad post.Last edited by goofy173; 10-08-2010, 01:46 PM.Leave a comment:
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Re: Dell E173FPf
OK. Check the lamps as in how?
BTW, I have 2 monitor screens. Both look just alike connected to this board.
I was working with our electrician and he wanted to test the voltage to the lamps. However just placing one lead of my Fluke 87 on the blue wire going to a lamp, shut them both off. Cycling the power turns them back on. We poked everywhere on the board with no difference so I don't believe this to be a bad connection.Leave a comment:
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Re: Dell E173FPf
I didn't find much help here searching because not many are talking about the Fpf's. The 2 caps I used are ICC brand. I also replaced that Q850 MOSFET or whatever it is as it was bad. Check all around that for damage or bad solder joints and found nothing. It's almost up to brightness on the right side, with obvious dimming on the left.
The 1st pic was before I changed the caps which are shown on the left side of the board, between the transformers....Leave a comment:
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Dell E173FPf
I've got 2 of these things sitting around. Lamps aren't coming on but the display is working. I checked the caps and they look good. Replaced them on one to make sure. No difference. What do I look for next? The 2 Transformers? Anyone have a real schematic for these?
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