Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor
Which MOSFETs you folks been using to replace the p5504edg and the p2804bdg? I saw mention of FDD6690 and FDD6685, do these look viable?
BShanahan14rulz
Member
Last Activity: 07-18-2020, 05:49 PM
Joined: 08-24-2010
Location: TN
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Re: need help on a laptop LCD panel, "2 minutes to black"
I just want to add that replacing the bulb is probably easier than you are thinking.
I usually don't take the screens apart unless I'm harvesting some diffusion plastic or diffraction gratings, but of the two screens I have taken apart, the tubes are in a metal "reflector" thing, and the whole thing slides out one side of the backlight panel.
So if the experts here reply that you may need new tubes, don't chalk it up as a loss just yet. I'm not an expert, but it does sound like as...Leave a comment:
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Re: Acer AL2416W
Ooops, I'm sorry. Here is a reposted version, with pictures attached instead of inline.
Picture names should, more or less, describe the board.
Controller board looks fine, but included the pics anyways, the first 3 pics.
Next two are just the pics of the recapped locations. I debated including these pics at all. The caps were a few mm bigger than the originals, but I still managed to get it to fit in without any shorts to the can or leads. Soldering has been tested with multimeter. Looks fine close-up (as fine as a...Leave a comment:
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Re: Acer AL2416W
Sorry, kind of using this thread as notes for myself.
[url]http://forum.allaboutcircuits.com/showthread.php?t=21285&page=2[/url]
Here, two different people have suggested two different pairs of mosfets that they have had success with on the al2416w inverter.
Original parts:
P5504EDG (P-Channel)
P2804BDG (N-Channel)
Potential replacement pair 1:
FDD5614P
FDD5612
Potential replacement pair 2:
FDD6685
FDD6690Re: Acer AL2416W
Sorry,Leave a comment:
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Re: Acer AL2416W power board
FYI, I have same board, and my transformer doesn't have that silver mark on it.
Is that solder, or is the copper being discolored?Leave a comment:
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Re: Acer AL2416W
Still haven't gotten around to pix, but I did find that one of the MOSFETs was shorted. It looks like I've got some research to do. IIRC, someone said it was best to replace the shorted mosfet and it's complementary brother. I haven't finished skimming the s3rvice manual (elektrotanya.com) , but I'll see if maybe there are more specs in there. There ARE a lot of good flowcharts and diagrams describing the internal heirarchy of the hardware as well as the processes of the firmware.
Still kind of iffy on testing something when said something is on, but...Leave a comment:
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Re: Acer AL2416W
Ok, I'll check fuses, from what I understand, less than 0.3 ohms when off is alright. I remember seeing two smd fuses, perhaps the third is hiding from me.
Transformers, you said not just to check continuity, but to reflow the joints? Will do. Should all resistances be the same from transformer to transformer? There are 6 identical transformers in a row, and I was going to test resistances for uniformity.
Polarity markings are silkscreened on the boards, all of my caps are oriented correctly. Will recheck solder joints.
As...Leave a comment:
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Re: Acer AL2416W
Update: Recapped all 10 caps on the TDK inverter board, though only 4 of them were visibly bad. Now instead of a split second of light (i.e. 1 or 2 tenths of a second), I get nothing. Still looks like it boots up, but no backlight activity.
I'm going to search for people with similar inverter boards to find how they troubleshooted (troubleshot?) their monitors, but if anybody wants to throw in some easy LCD monitor troubleshooting tips, feel free, I would appreciate it.Leave a comment:
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Re: Can't seem to open Acer AL2416W case
As long as it's open, you might want to think about replacing at least the four caps in the first bank anyways: C34, C35, C36, and C38.
I'm still a noob, but of the two AL2416W's I've taken apart, those 4 caps were popped on both monitors. I used Panasonic FC's (meant to use FM's), but a word of caution: the ones I used are slightly taller and wider. Instead of 4 inline, I staggered them. Not quite as good as new, but I can live with it.Leave a comment:
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Re: Acer AL2416W
Yes, I'm planning on recapping them. I can't say for sure, but my feeling is that I must have broken a cap when I was bending the legs. The bending motion exerts a slight pulling motion on the pin when bent the way I bent the first few, since I was using needlenose pliers and rolling the wire around the tip, using the capacitor can for leverage.
I also tested for continuity across all caps' legs once soldered on, and none of them were completely continuous. I should have looked at the resistance values too, though, to make sure they're all the same. Meh....Leave a comment:
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Re: Acer AL2416W
replaced with panasonic fc. Both FM and FC were the same size and capacity, but the FM was 50V while the FC was 35V. Both were slightly larger than the original parts.
I was originally going to use the FM (bought 10 of each) but it was late and I forgot
Anyways, it works much better now. Only problem is that the backlight sometimes is unstable. It dims/flickers very slightly from time to time, and if you turn it on from a cold start (i.e. if the backlight hasn't been on for a while), the backlight will go out after 1 or 2 seconds....Leave a comment:
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Re: Acer AL2416W
original parts seem to be wired in parallel. Just a random observation.
Now, I have one more question before I pull the trigger and order replacement caps. Here are my two candidates:
Panasonic FC: [url]http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=P10294-ND[/url]
Panasonic FM: [url]http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=P12392-ND[/url]
I've read that the FM is better than the FC, but in my particular situation, the FM has a higher voltage rating (all else being the...Leave a comment:
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Re: Acer AL1916W
mscott, what brand were the dark-green caps? Don't take it apart if you already put it back together, but just curious...Leave a comment:
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Re: New Members - please post your introductions here
Great info in here, perfect for an electronics packrat like myself.Leave a comment:
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Re: Acer AL2416W
Lucky13 and adm123,
Thanks for your suggestions. I was going crazy. It seemed like I had found that I needed a 35V 100uF cap. Then I hear about ripple response and start looking for something to match. In that process I notice ESR ratings. I did see a post somewhere stating that name-brand caps like rubycon, panasonic, etc., have drastically better specs than the mystery caps with no informations, like these NKCON caps... I've decided. I will get some panasonic caps of the best line I can find.
Thanks again for your inputs!Last edited by BShanahan14rulz; 08-25-2010, 10:25 AM.Leave a comment:
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Re: Acer AL2416W
So as long as the ripple response and ESR is equal to or better than the original component, and the capacity is the same, and the voltage is greater than or equal to the original, I should be fine? Somewhere I saw a post showing how awful the ESR and ripple response for these bad caps (pre-fail) are compared to good name-brands, so if this is the case, I should be fine with picking a name-brand with the same specs as what I had before? I will order some new caps next week from digikey, and hopefully have some time to install them soon.
I can't edit...Last edited by BShanahan14rulz; 08-25-2010, 10:21 AM. Reason: Add link to another useful post detailing replacement candidates for the FETsLeave a comment:
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Re: acer AL2416w HELP
A question and an observation here. I have the TDK TBD292LF inverter board to the AL2416W. It has 2 banks of 4 caps, and two more just hanging around. The center bank of 4 and the two caps just hanging around are F2056, while the other 4 closer to the end are labeled F2079, and are obviously blown on my board. All 10 caps are 35V 100uF, and all by the same maker. I didn't notice this at first, so I may end up having to order a few different caps to try out...
Now, for my question. This pertains to checking the surface-mount FETs...Leave a comment:
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Acer AL2416W
(I had posted this as a reply to the Acer 1916W thread, retiredcaps kindly informed me that it would be more polite to create my own thread, so here it is. Badcaps, I have quoted your reply in the other thread and can remove it if need be. Right now, I will search for ripple and ESR specifications of the original caps in order to find a suitable replacement, as RetiredCaps' link suggested)
Howdy all,
I have an acer 2416W, same problem. Inverter board has 10 NKCON electrolytics, 4 of which are blown. I plan to replace all 10, just to be sure.
From what... -
Re: Acer AL1916W
I have an acer 2416W, same problem. Inverter board has 10 NKCON electrolytics, 4 of which are blown. I plan to replace all 10, just to be sure.
From what I've found here, NKCON is taiwanese maker: Nakama.
My particular caps read 35V 100uF and are labeled F2056 and EVL. Same dimension ratio, color scheme, and failure mode (top vent fine, bottom plug popping out) as those in this post: [url]https://www.badcaps.net/forum/showpost.php?p=26927&postcount=88[/url]
Mine has 6 CCFL tubes, with a total 12 transformers all lined...Leave a comment:
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