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    Dell E198WFP Preventative Recap

    Howdy everyone,

    After a long time away (was here a few years ago recapping some moboards and their power supplies), I'm back and finally going to get around to doing some preventive recaps on my monitors. I've got a bunch of Dell E198WFP's. They are on pretty much all the time, and would like to keep them going as long as possible, so thus the reason why I want to do a preventive recap on them.

    I took a few long looks at budm's galleries and figured out how to get one of them apart. By the way Budm, you don't have the E198WFP on your site. I know it's a cousin of several others you have on there, but if you want to grab any of the pics I've uploaded to put on your site for others, please feel free to do so. And if I don't have a picture of something you think should be included, please let me know and I'll happily provide.

    One quick question - it seems that these flatscreens are particularly susceptible to being fried because of shorting/overloads in troubleshooting. Is there a proper way you are to power them off and then discharge the supplies before tearing down? I know I'm a little late in asking as I already tore one apart, but after reading budm's guides I had an oh crap moment on the high voltage warning. Or is it more of you have to be careful when you are live troubleshooting? I never did anything special when I recapped the computer's power supplies, but that may just be because I didn't know better.

    Before I dive in to the datasheets and try to remember all of the lessons Mockingbird and Momaka (and all the others) taught me on identifying the right replacement caps, can those of you who exclusively work on these displays weigh in on what all needs changed? I included diagrams I made of the boards with all of the caps and their specs. These cap manufacturers are all on the bad cap manufacturers list, so unless someone says otherwise I'll change them all.

    And are there any other recommendations you have to extend the life of these displays? Anything else that should be changed besides the caps?

    Thanks!
    Attached Files

    #2
    Re: Dell E198WFP Preventative Recap

    I have a saying if it aint broke leave it alone at first sign of a problem then recap
    Dell sometimes you will see united chemicon KY series and nichicon caps they are top of the line of capacitors. replace what's bad or ready to fail get rid of any Capxon
    Us Panasonic fm ,fr,fc series or united chemicon ky series. Mainboard check for bad 220uf 16v caps

    To extend the life of displays let monitor go to sleep when not in use and lower intensity of back lights.

    Comment


      #3
      Re: Dell E198WFP Preventative Recap

      Originally posted by 1supertech View Post
      I have a saying if it aint broke leave it alone at first sign of a problem then recap
      Dell sometimes you will see united chemicon KY series and nichicon caps they are top of the line of capacitors. replace what's bad or ready to fail get rid of any Capxon
      Us Panasonic fm ,fr,fc series or united chemicon ky series. Mainboard check for bad 220uf 16v caps

      To extend the life of displays let monitor go to sleep when not in use and lower intensity of back lights.
      Certainly I'll agree in some context's that if it ain't broken don't fix it. But this is the first time I'v heard of that analogy here. My understanding is that in alot of instances bad caps are just ticking timebombs and when they do blow, they can completely destory the device. And that is even more so relevant here (with displays) because when they blow they can take out other components that can be hard/impossible to replace. So I think it's certainly prudent that if you have the time and resources to do a prevantive recap you should if you want to try to get as much life as possible out of a device. Certainly don't see any harm in doing so?!?!?!?


      That said, I plan on replacing all of them as they are all on the list of known bad manufacturers. I identified all the caps for the power supply and am using all Panasonic FR's for replacement. I know there are cheaper options, but I used them predominantly in all of the motherboard and power supply recaps I did a few years ago. They've got a long life, and way better values than the original and it was just easier to identify replacements. Here's my notes if anyone's interested.
      Code:
      PS:
      Cap		Brand		uf	Volt	D MM	H MM	Info		ESR	Ripple		Digikey#	Replacement		DxH	ESR	Ripple		
      161		Taicon		220	10	6.3	11	PW		0.25	290		P14375-ND	EEU-FR1A221		6.3x11	0.130	455					
      159&160		Taicon		1000	10	10	16	PW		0.068	1050		P14378-ND	EEU-FR1A102L		8x15	0.041	1240					
      4		Taicon		47	25	5	11	PW		0.60	180		P14411-ND	EEU-FR1E470		5x11	0.300	280
      203&204		Taicon		470	25	10	16	PW		0.065	995		P14417-ND	EEU-FR1E471Y		10x12	0.043	1290
      153&154		Taicon		680	25	10	20	PW		0.052	1220		P14422-ND	EEU-FR1E681		10x16	0.028	1790
      Big question here, this is under the assumption that the "PW" series of Taicon caps are actually PZ. I couldn't find PZ listed in the cap datasheet depot, but did fine this Taicon cross reference listing PZ(PW) and when I looked at the Taicon PZ data sheet it had the (PW) as well. Can someone confirm this? Otherwise my initial specs of these caps for replacement comparison is totally wrong.


      Now on to the video card. Got several issues here. First the info/specs:
      Code:
      Video:
      Cap		Brand		uf	Volt	D MM	H MM	Info		ESR	Ripple		Digikey#	Replacement		DxH	ESR	Ripple		
      36		Teapo		4.7	16	5	12?	SY		Doesn't exist???	Only one cap available at Digikey for this uf/V	1189-2183-ND
      30&31		Teapo		330	16	8	11	SC		0.120	620		P12372-ND	EEU-FM1C331		8x11	0.056	950
      15		Teapo		100	25	6.3	11	SC		0.220	250		P14413-ND	EEU-FR1E101		6.3x11	0.130	455
      76		CapXon		470	25	8	11.5	KM		NO!	410		P14417-ND	EEU-FR1E471Y		8x15	0.041	1240
      Multiple	OST		10	50	5	11	RLP		1.40	120		565-1702-ND	EKZE500ELL100ME07D	5x7	0.50	210
      1. The Teapo 4.7uf 16V SY cap doesn't exist in Teapo's SY datasheet. But that's clearly what the cap says on it. Furthermore, there is only one cap available at digikey for this uf/V (1189-2183-ND). Mouser has a few more available. Thoughts?
      2. The CapXon cap doesn't have an ESR listed in it's data sheet (KM). I believe that means it's a general purpose cap. I choose a Panny FR for it's replacement using the ripple as a guide. This OK?
      3. There wasn't alot of choices to replace the OST cap(s). Had to get away from my panny picks and go with a United Chemi-Con KZE. Again, any concerns or better recommendation?

      Thanks!

      Comment


        #4
        Re: Dell E198WFP Preventative Recap

        Try this 4.7uf 50v
        http://www.digikey.com/product-detai...1597-ND/756113

        Comment


          #5
          Re: Dell E198WFP Preventative Recap

          4.7uf 16 on Digikey is only 85c

          Comment


            #6
            Re: Dell E198WFP Preventative Recap

            just FR everything - inc the logic board.
            i'v fixed about 5 like that.

            Comment


              #7
              Re: Dell E198WFP Preventative Recap

              Originally posted by 1supertech View Post
              4.7uf 16 on Digikey is only 85c
              Ahh, good catch. Totally forgot to look at that.

              Originally posted by 1supertech View Post
              I forgot you could go up in voltage on a cap if you had to. TY for the reminder! I took another look at Digikey searching 4.7uf and anything over 16V and that appears to be the best long life cap available.

              The only thing that concerns me though is that cap is not what I would think is a low ESR cap. It's specs are 1.9 Ohm and 88 Ripple. But I've got nothing to compare it to as the original cap doesn't seem to exist. I dug around some more on Teapo, and I can't find they manufacturer a 4.7uf/16V cap in any line. Guess it's counterfeit or badly misprinted.

              Comment


                #8
                Re: Dell E198WFP Preventative Recap

                Originally posted by stj View Post
                just FR everything - inc the logic board.
                i'v fixed about 5 like that.
                I would if I could but availability is the problem. For the PS, I found all FR caps. But the video board, nope. For example, this rogue 4.7uf 16V Teapo, that 1supertech found a good KY replacement, I looked at going Panny FR 4.7uf 50V which is EEUFR1H4R7. Only place that has that in stock is Farnell Element 14 in their UK stock. Minimum $20 to ship across the pond. Nope.

                Or the bucketload of OST 10uf 50V caps I need. Panny FR equivalent is EEUFR1H100 and you guessed it, only place that has it in stock is Farnell Element 14 UK again. Have to settle for the UCC KZE's.

                Comment


                  #9
                  Re: Dell E198WFP Preventative Recap

                  then use rubycon YXG or ZL

                  Comment


                    #10
                    Re: Dell E198WFP Preventative Recap

                    Originally posted by stj View Post
                    then use rubycon YXG or ZL
                    For which?

                    Instead of the UCC KZE I picked for the OST one's?? Thought KZE was a recommended line. And neither YXG or ZL is available at digikey for 10uf 50v.

                    Same story for the 4.7uf rogue Tepco. No YXG or ZL available at digikey in that capacitance. The KY that 1supertech pointed out is on the recommended line.

                    If there's better caps I'm all ears but they need to be available to me in the states. It appears that there's a bigger selection 'across the pond' in the UK.

                    Comment


                      #11
                      Re: Dell E198WFP Preventative Recap

                      here:
                      http://www.digikey.com/product-detai...0315-ND/266324

                      http://www.digikey.com/product-detai...0316-ND/266325

                      Comment


                        #12
                        Re: Dell E198WFP Preventative Recap

                        That's Panny's FC product line. I'm not crazy about those especially on the rated hours and ESR/Ripple compared to the KZE I picked for the OST's 10uf 50V. Same story with the KY that 1supertech recommended to deal with that rogue 4.7uf 16V Teapo. I'm using FM/FR for everything else on the video board, which is top of the line so I'd like to try to stay in that category for everything, even if I have to go to other brands. I also know that the rated hours doesn't always mean a hill of beans, but the KZE & KY series caps are supposed to be top of the line along with Panny's FM/FR.

                        Comment


                          #13
                          Re: Dell E198WFP Preventative Recap

                          First let me say thanks again to everyone who's helped. After mulling it over, here's what I'm planning on ordering to use for this preventive recap. Anyone have any final thoughts before I do?

                          Code:
                          PS:
                          Cap		Brand		uf	Volt	D MM	H MM	Info		ESR	Ripple		Digikey#	Replacement		DxH	ESR	Ripple		
                          161		Taicon		220	10	6.3	11	PW		0.25	290		P14375-ND	EEU-FR1A221		6.3x11	0.130	455					
                          159&160		Taicon		1000	10	10	16	PW		0.068	1050		P14378-ND	EEU-FR1A102L		8x15	0.041	1240					
                          4		Taicon		47	25	5	11	PW		0.60	180		P14411-ND	EEU-FR1E470		5x11	0.300	280
                          203&204		Taicon		470	25	10	16	PW		0.065	995		P14417-ND	EEU-FR1E471Y		10x12	0.043	1290
                          153&154		Taicon		680	25	10	20	PW		0.052	1220		P14422-ND	EEU-FR1E681		10x16	0.028	1790
                          Code:
                          Video:
                          Cap		Brand		uf	Volt	D MM	H MM	Info		ESR	Ripple		Digikey#	Replacement		DxH	ESR	Ripple		
                          36		Teapo		4.7	16	5	12?	SY		NO DATASHEET!		565-1597-ND	EKY-500ELL4R7ME11D	5X11	1.9	88	NOTE: 50V CAP, no 4.7uf 16V available
                          30&31		Teapo		330	16	8	11	SC		0.120	620		P12372-ND	EEU-FM1C331		8x11	0.056	950
                          15		Teapo		100	25	6.3	11	SC		0.220	250		P14413-ND	EEU-FR1E101		6.3x11	0.130	455
                          76		CapXon		470	25	8	11.5	KM		NO!	410		P14417-ND	EEU-FR1E471Y		8x15	0.041	1240
                          Multiple	OST		10	50	5	11	RLP		1.40	120		565-1702-ND	EKZE500ELL100ME07D	5x7	0.50	210
                          I'm not changing the main 120uf 450V cap as lots say I don't need to, and I can't find a suitable replacement at digikey. But if I should, and you can find a good replacement, I'm all ears.

                          Comment


                            #14
                            Re: Dell E198WFP Preventative Recap

                            Hi friend

                            Here is the datasheet for Teapo SY

                            http://www.teapo.com/WebSiteFile/Pro...ct_Data/SY.pdf

                            The specs for 5x11 in the SY series are 210 for the ripple and 0.580 for the impedance, which matches the KY you chose perfectly. Good job

                            Here are some changed you might like to consider:

                            Firstly, for the PSU:

                            P14375-ND EEU-FR1A221
                            P14411-ND EEU-FR1E470

                            Those parts are 6.3x11 and 5x11, respectively. The datasheet specifies those sizes as having an endurance rating of only 2000 hours.

                            Instead, please consider the following alternatives:

                            P14375-ND
                            1189-1726-ND (6000 Hours), 1189-1546-1-ND (7000 Hours), 565-3566-ND (6000 Hours).

                            P14411-ND
                            565-4239-ND (7000 Hours), 1189-1630-1-ND (7000 Hours), 1189-2240-ND (10,000 hours).

                            And for the logic board:

                            P14413-ND
                            565-1545-ND (5000 hours), 1189-1898-ND (5000 hours), 565-3556-ND (5000 Hours), 1189-1857-ND (5000 Hours), 1189-1300-ND (6000 Hours), 565-3574-ND (6000 Hours), 565-3910-ND (7000 Hours), 565-4059-ND (7000 Hours), 1189-2268-ND (7000 Hours), 1189-2239-ND (10,000 Hours).

                            565-1702-ND
                            For this cap we need to drop from RLP's 120 ripple to around 100 and tripple the ESR to 1.5. No one makes something with such a rating and a low ESR AFAIK in this diameter.

                            1189-1852-ND (5000 Hours) or 565-1598-ND (5000 Hours).

                            You should be ok here, and it's preferable to use a longer life cap here, eventhough the ESR and Ripple aren't as great as the originals, because they probably were overrated for the circuit anyway.

                            One last thing to keep in mind: YXM series (where a 10,000 hour part is included) is not a low-ESR cap. So its benefits in terms of longevity may be negligible because the effect that a higher ESR has on a cap is more heat, so the endurance rating gets negated. You're probably better off with the 7000 hour low ESR parts.

                            YXM is probably designed for circuits that don't need that much ripple filtering but get very hot for other reasons.

                            Good luck, and please keep us updated on your progress.
                            "We have offered them (the Arabs) a sensible way for so many years. But no, they wanted to fight. Fine! We gave them technology, the latest, the kind even Vietnam didn't have. They had double superiority in tanks and aircraft, triple in artillery, and in air defense and anti-tank weapons they had absolute supremacy. And what? Once again they were beaten. Once again they scrammed [sic]. Once again they screamed for us to come save them. Sadat woke me up in the middle of the night twice over the phone, 'Save me!' He demanded to send Soviet troops, and immediately! No! We are not going to fight for them."

                            -Leonid Brezhnev (On the Yom Kippur War)

                            Comment


                              #15
                              Re: Dell E198WFP Preventative Recap

                              Thank you friend for once again sharing your knowledge.

                              I totally forget about upping the cap's rated voltage to get longer life. And I forgot that you can't just go by the digikey rated life, you have to dig in to the data sheets and look at the size of the caps. You told me that, I've been out of this too long. I'm always in for a good puzzle and identifying the best replacement caps is a little bit of that. One day I'll get this down. I should start recapping everything in the house but alas my soldering skills are not the greatest and if I break something functional that is wife related under the guise of making it last even longer, I will be the one to have it's lifespan shortened.

                              I looked at the recommendations, and choose mostly all 7000 hour caps from your suggestions, with consideration to their price and getting the highest Ripple / lowest ESR from those.
                              Code:
                              PS:
                              Cap		Brand		uf	Volt	D MM	H MM	Info		ESR	Ripple		Digikey#	Replacement		DxH	ESR	Ripple		
                              161		Taicon		220	10	6.3	11	PW		0.25	290		1189-1726-ND	16ZLH220MEFC6.3X11	6.3x11	0.094	540	NOTE: Went up to 16v for longer life.
                              159&160		Taicon		1000	10	10	16	PW		0.068	1050		P14378-ND	EEU-FR1A102L		8x15	0.041	1240					
                              4		Taicon		47	25	5	11	PW		0.60	180		1189-1630-1-ND	35ZLJ47MTA5X11		5x11	0.4	450	NOTE: Went up to 35v for longer life.
                              203&204		Taicon		470	25	10	16	PW		0.065	995		P14417-ND	EEU-FR1E471Y		10x12	0.043	1290
                              153&154		Taicon		680	25	10	20	PW		0.052	1220		P14422-ND	EEU-FR1E681		10x16	0.028	1790
                              
                              Video:
                              Cap		Brand		uf	Volt	D MM	H MM	Info		ESR	Ripple		Digikey#	Replacement		DxH	ESR	Ripple		
                              36		Teapo		4.7	16	5	11	SY (specs=size)	0.580	210		565-1597-ND	EKY-500ELL4R7ME11D	5X11	1.9	88	NOTE: 50V CAP, no 4.7uf 16V available
                              30&31		Teapo		330	16	8	11	SC		0.120	620		P12372-ND	EEU-FM1C331		8x11	0.056	950
                              15		Teapo		100	25	6.3	11	SC		0.220	250		1189-2268-ND	35ZLJ100M6.3X11		6.3x11	0.17	700	NOTE: Went up to 35v for longer life.
                              76		CapXon		470	25	8	11.5	KM		NO!	410		P14417-ND	EEU-FR1E471Y		8x15	0.041	1240
                              Multiple	OST		10	50	5	11	RLP		1.40	120		565-1598-ND	EKY-500ELL100ME11D	5x11	1.50	100	NOTE: Went up in ESR/Down in Ripple.
                              I do have a few questions though please:
                              Originally posted by mockingbird View Post
                              Here is the datasheet for Teapo SY

                              http://www.teapo.com/WebSiteFile/Pro...ct_Data/SY.pdf

                              The specs for 5x11 in the SY series are 210 for the ripple and 0.580 for the impedance, which matches the KY you chose perfectly. Good job
                              First, I must credit 1supertech as he suggested that cap cause I forgot that you can up the voltage. That cap has been a bit of a thorn to me because it wasn't listed in the data sheet and it was driving me crazy. When you phrased the specs I took another look at the data sheet and realized how you came up with them. The cap itself isn't listed (4.7uf 16V) but it's size 5x11 is, and the specs for that size are all the same (0.580 ESR / 210 Ripple).

                              But now, having that information, leads me to think the replacement selected won't work. The KY replacement EKY-500ELL4R7ME11D has an ESR of 1.9 and Ripple of 88. That's the wrong direction compared to the replacement right (Ripple must be greater than or equal to original, ESR must be lesser than or equal to original). So that replacement cap won't work?? Or will it because the replacement cap's voltage has been substantially increased...?!?!

                              And sort of the same question here:
                              Originally posted by mockingbird View Post
                              565-1702-ND
                              For this cap we need to drop from RLP's 120 ripple to around 100 and tripple the ESR to 1.5. No one makes something with such a rating and a low ESR AFAIK in this diameter.

                              1189-1852-ND (5000 Hours) or 565-1598-ND (5000 Hours).

                              You should be ok here, and it's preferable to use a longer life cap here, eventhough the ESR and Ripple aren't as great as the originals, because they probably were overrated for the circuit anyway.
                              Are we going down in Ripple / up in ESR to get longer life rated caps vs using caps with better specs than the original but a short rated life???? (Also because as you mention we can safely do this because the original caps didn't need the specs it had so the replacements with higher specs than the original works and gets us longer life)....!?!? I definitely take your word for the recommended replacements, I'm just curious on how we're going in the opposite direction of the 'guidelines'.

                              As always thank you again for taking the time to share your knowledge.

                              Comment


                                #16
                                Re: Dell E198WFP Preventative Recap

                                Originally posted by bigjess007 View Post
                                Thank you friend for once again sharing your knowledge.

                                I totally forget about upping the cap's rated voltage to get longer life.
                                Certainly, my friend

                                That's not necessarily always true. Some datasheets will up the endurance of two caps of the same diameter if the voltage is higher, so for example, they might specify something like 2000 hours for 6.3mm caps from 6.3-10V and then 3000 hours from 16-25V, etc... But that's not universally true. More often, it's a larger diameter within the same series which drastically improves its characteristics. So for example, within the Panasonic FR series, 5mm caps are 2000 hours, but if you jump to 8mm, you go to something like 6000 or 7000 hours.
                                I looked at the recommendations, and choose mostly all 7000 hour caps from your suggestions, with consideration to their price and getting the highest Ripple / lowest ESR from those.
                                So with the first two instances where you switch from FR to ZLH and ZLJ, it has more to do with the series you changes to than the increase in voltage. 5mm and 6.3mm caps within the FR series are all 2000 hours, but once you get into the 8mm range, it goes to 6000 hours and up. ZLH starts at 6000 hours, regardless of the diameter, and then goes higher. ZLJ is a good example of what was stated previously. It starts at 6000 hours, regardless of the diameter, but even within the same diameter, you gain 1000 hours if you use a part that falls within the voltage range of 10-50V.
                                The cap itself isn't listed (4.7uf 16V) but it's size 5x11 is, and the specs for that size are all the same (0.580 ESR / 210 Ripple).

                                But now, having that information, leads me to think the replacement selected won't work. The KY replacement EKY-500ELL4R7ME11D has an ESR of 1.9 and Ripple of 88. That's the wrong direction compared to the replacement right (Ripple must be greater than or equal to original, ESR must be lesser than or equal to original). So that replacement cap won't work?? Or will it because the replacement cap's voltage has been substantially increased...?!?!
                                I can see where you got confused here. SY's datasheet doesen't seem to follow the same rules with regard to diameter and ESR/Ripple ratings as almost all other datasheets do. O the figures you're getting are from the first page, which don't have a 16V 47uF part listed, but list other 5x11 parts at those specs you mentioned.

                                Now when you scroll down to the second page, you see this:

                                So, considering that the 50V variant is 100 ripple and 2 Ohms (and yours is 16V), KY is well within spec here.
                                Are we going down in Ripple / up in ESR to get longer life rated caps vs using caps with better specs than the original but a short rated life???? (Also because as you mention we can safely do this because the original caps didn't need the specs it had so the replacements with higher specs than the original works and gets us longer life)....!?!? I definitely take your word for the recommended replacements, I'm just curious on how we're going in the opposite direction of the 'guidelines'.

                                As always thank you again for taking the time to share your knowledge.
                                For the 5mm OST RLP on the logic board, yes. If this was in the PSU, it wouldn't be a good idea. If this was on a logic board around a complex circuit, it wouldn't be a good idea. But this is on the logic board probably just providing some minor filtering for the IC. It's definitely worthwhile sacrificing ripple/ESR here for a longer life cap. And only in this case, because none of the long life 5mm caps go up that high in ripple and that low in ESR AFAIK.

                                Good luck my friend, G-D Bless, and please report your results here.

                                Attached Files
                                "We have offered them (the Arabs) a sensible way for so many years. But no, they wanted to fight. Fine! We gave them technology, the latest, the kind even Vietnam didn't have. They had double superiority in tanks and aircraft, triple in artillery, and in air defense and anti-tank weapons they had absolute supremacy. And what? Once again they were beaten. Once again they scrammed [sic]. Once again they screamed for us to come save them. Sadat woke me up in the middle of the night twice over the phone, 'Save me!' He demanded to send Soviet troops, and immediately! No! We are not going to fight for them."

                                -Leonid Brezhnev (On the Yom Kippur War)

                                Comment

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