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hansilili
Joined: 09 Mar 2007
Posts: 302
Location: Köln, Germany
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| Posted: Fri Dec 21, 2012 9:54 am Post subject: |
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| Zolzar wrote: | I will post a list of all the electrolytics once it has been compiled. It won't be board specific but it will all be here.
John |
That would be a great service, though board specific would be even better.
Good luck for the rest.
hansili
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HansA, alles andere ist euer Bier!
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Fri Dec 21, 2012 9:59 am Post subject: |
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Hi,
For my Marquee project I made the list attached to this post. Maybe its structure can be of help...
Regards,
barclay66
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Capacitors.xls |
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46 KB |
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656 Time(s) |
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Zolzar
Joined: 26 Jun 2009
Posts: 252
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| Posted: Fri Dec 21, 2012 12:43 pm Post subject: |
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Very nice. I have started a based on the listing in the service manual but info not have the dimensions.
John
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Fri Dec 21, 2012 12:53 pm Post subject: |
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Hi,
Thank You. I had to pay attention to the dimensions because space was limited in some areas (either diameter, height or both)...
Regards,
barclay66
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Fri Dec 21, 2012 5:24 pm Post subject: |
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| Tinman wrote: | Well, I got it from the horse's mouth itself some time ago. These were a special order from NEC just for this purpose.These caps are generally ok.
But you can do whatever you like. Try new one's and see if they get hot.
Marc |
I don't doubt that it's a special cap. Electrohome used film caps with extremely high voltage ratings in a similar location . Anyway, I'm glad this was posted, looks like I will need to run the set and check those 2.
On a side not, the Digikey site has an excellent search engine where you can toggle almost any parameter. You can get a cap in those specs and dimensions with a full 1.2amp ripple rating, and correct size/ lead spacing. It's an Epcos cap, which I think is who made the original ?
http://www.digikey.com/scripts/DkSearch/dksus.dll?lang=en&keywords=eco-s2ga470ba&WT.term=eco-s2ga470ba&WT.mc_id=Capacitors&WT.medium=cpc&WT.campaign=Capacitors&WT.content=text&WT.srch=1&WT.source=google
BTW, the reason I replaced these is the factory wire-bundle plastic tie-clip was right over these, and when they shut the lid it left a huge dent in the top of one and partially tore the foil at the rupture seam. 
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Fri Dec 21, 2012 5:31 pm Post subject: |
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According to this german forum topic the Rubycon LPHR can stand 8-18A p-p Current at 10-100kHz range
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projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Fri Dec 21, 2012 7:34 pm Post subject: |
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Not sure where I found it (it was long ago) but capacitor replacement list for PG plain powersupply is already exsiting, so I repost it, I hope the original author don't mind it. It wasn't me who did this.
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NEC MultiSync 9PG Plain Capacitor List.txt |
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1.8 KB |
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_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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Zolzar
Joined: 26 Jun 2009
Posts: 252
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| Posted: Fri Dec 21, 2012 8:30 pm Post subject: |
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Wow! You guys are unreal! What's nice about this list is it is specific to the board. The service manual isn't quite as friendly. It does show the location but provides no further reference without going back to the prints.
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Zolzar
Joined: 26 Jun 2009
Posts: 252
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| Posted: Sun Dec 23, 2012 1:14 pm Post subject: |
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ok .... so there are 338 electrolytic capacitors consisting of 48 unique values in a PG series projector. Replacing all of these will be a very daunting task so I will be starting with the deflection board and power supplies and see what happens from there.
John
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Sun Dec 23, 2012 6:14 pm Post subject: |
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Don't worry, I did exactly the same thing on a 9PG just a few weeks ago, It's a lot of fun 
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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Zolzar
Joined: 26 Jun 2009
Posts: 252
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| Posted: Mon Dec 24, 2012 12:04 am Post subject: |
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gjacky,
Did you do the whole projector or just the deflextion board?
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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Zolzar
Joined: 26 Jun 2009
Posts: 252
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| Posted: Mon Dec 24, 2012 3:14 am Post subject: |
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Thanks for the heads up. I have yet to shop around for the caps but I will take your advice on the replacements. I've pretty much used Newark as my supplier in the past so Ill see what they have available. I'm open to suggestions if you think I should inquire elsewhere.
John
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Mon Dec 24, 2012 8:24 am Post subject: |
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| Zolzar wrote: | gjacky,
Did you do the whole projector or just the deflextion board? |
I did it on the whole machine, but I didn't make a accurate list of parts, and as it turned out I missed some caps, so "only" 95% of the caps were replaced (and intentionally left the bipolar caps and tantallum caps alone). I did some simplyfication with cap values too, for example a 100uF cap is present in 6.3V 10V, 16V, 25V, 35V, 50V values and I only ordered 16V and 50V (low esr) types and that covered the whole range (except the system boards, because the 100u/50V were too big for them) you can do the same with 47uF caps.
I used cheap jamicon caps for the regular places, and various Chinise low-esr caps for more critical places, and Rubycon YXF (low-esr) for power supply bypass. While I know the Chinise caps are not the best, but they will support the machine until the tubes will be toasted. The new caps costed yet almost 100$.
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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Zolzar
Joined: 26 Jun 2009
Posts: 252
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| Posted: Mon Dec 24, 2012 10:27 pm Post subject: |
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Considering I got the PJ for free, $100 and the time to recap is a fair price to pay. I have a line on a vacuum desoldering station to help me safely remove the old caps where I can't get to the old leads.
John
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Mon Dec 24, 2012 10:49 pm Post subject: |
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| Zolzar wrote: | Considering I got the PJ for free, $100 and the time to recap is a fair price to pay. I have a line on a vacuum desoldering station to help me safely remove the old caps where I can't get to the old leads.
John |
I guess you haven't read "all" the threads on this subject, lol. Attempting to remove "any" caps in a NEC projector by desoldering is not wise. If the leads are not long enough to clip the old cap off with enough to solder to then you should bend the cap sideways until the insides of the old cap pull out and are left standing up on the board and then clipped off leaving enough to solder the new cap to. Attempting to desolder will surely damage the board. I have repaired to many damaged traces on NEC boards to recommend any other way to replace.
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Zolzar
Joined: 26 Jun 2009
Posts: 252
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| Posted: Tue Dec 25, 2012 1:10 am Post subject: |
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Mac! You're the man! Obviously I have not read all the threads on the subject. .:.LOL! I've read a bunch but never read anything specific to desoldering NEC boards. I'm going to take your advice. Thank you! Hopefully I'll have some time later this week to place the order for the caps.
Merry Christmas!
John
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Tue Dec 25, 2012 4:12 pm Post subject: |
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| macgyver655 wrote: | | Zolzar wrote: | Considering I got the PJ for free, $100 and the time to recap is a fair price to pay. I have a line on a vacuum desoldering station to help me safely remove the old caps where I can't get to the old leads.
John |
I guess you haven't read "all" the threads on this subject, lol. Attempting to remove "any" caps in a NEC projector by desoldering is not wise. If the leads are not long enough to clip the old cap off with enough to solder to then you should bend the cap sideways until the insides of the old cap pull out and are left standing up on the board and then clipped off leaving enough to solder the new cap to. Attempting to desolder will surely damage the board. I have repaired to many damaged traces on NEC boards to recommend any other way to replace. |
Mac you're right, however I removed 80% of the caps with the conventional way, and only hurt maybe two traces of the hundreds of caps (Sytem boards are bitches, I also cut the caps there). If the caps started to leak and the electrolyte already spilled to the PWB it is much harder to clean the board if you just cut off the legs instead of removing them correctly.
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Tue Dec 25, 2012 10:55 pm Post subject: |
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I did an entire set worth of boards using a cheap 45 watt soldering iron and a GOOT solder sucker and never damaged a thing, but thats not the point, i sure as hell would not be doing it that way again when its WAY easier to cut the legs off or pull the cap off its legs with pliers
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