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2016-03-11 03:12 <arossdotme> im not so sure that the Samsung cells are right for a few amp constant load looking at the review on that site
2016-03-11 03:48 <whitequark> a few amp is generally not a problem for cells
2016-03-11 03:48 <whitequark> once you're looking at >5A or 10A you start having problems
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2016-03-11 12:08 <wpwrak> eintopf: on the topic of fixing monitors by swapping capacitors: the important parameters are capacitance, voltage, and mechanical compatibility
2016-03-11 12:10 <wpwrak> if you can't get the right capacitance or voltage, you can always use some larger value. you may be able to get away with slightly smaller values than the original, too, but you'd be taking chances.
2016-03-11 12:11 <eintopf> wpwrak: https://youtu.be/df1q81l_d0M?t=4m24s
2016-03-11 12:11 <wpwrak> size increases with capacitance and voltage, so this limits how far you can exceed the original values.
2016-03-11 12:11 <eintopf> I think I need these, but I better lookup again which capacitance they use
2016-03-11 12:11 <eintopf> and I don't do experimenting stuff :D
2016-03-11 12:11 <eintopf> just replace the same values
2016-03-11 12:12 <wpwrak> pcb looks familiar :)
2016-03-11 12:12 <eintopf> pcb?
2016-03-11 12:12 <wpwrak> the board
2016-03-11 12:12 <wpwrak> the values are written on the caps. very easy to find those values :)
2016-03-11 12:13 <eintopf> yes, there is no unknown stuff on the board
2016-03-11 12:13 <eintopf> it's very open hardware friendly if you have the chance to open it
2016-03-11 12:13 <eintopf> -> Problem: Blinking power led, the display do not start properly. The main reason is the capacitors of internal power supply.
2016-03-11 12:13 <eintopf> exact my problem
2016-03-11 12:14 <wpwrak> now, you have to be careful about size. first, of course, you want to make sure the contacts have the same arrangement. those caps usually have them on one side, but there are also caps that have one on either side. you want to make sure you pick the right one.
2016-03-11 12:15 <wpwrak> if the original size isn't available, then you may be able to use something bigger, but you have to check the available space first
2016-03-11 12:16 <wpwrak> i'd also check for burnt components. e.g., on my two problem monitors, i have various spots and components that look overheated. so i'm not sure just fixing caps will solve the problems.
2016-03-11 12:18 <wpwrak> also, you don't need to replace all the caps, just the ones that look defective. you can tell by looking at their top. if it bulges to the outside or has even ruptured, the cap needs replacing
2016-03-11 12:18 <wpwrak> if the top is nice and flat it's probably okay
2016-03-11 12:18 <eintopf> yes ok.
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2016-03-11 12:19 <eintopf> and the sizes, I solder them out and take them to the electronic market
2016-03-11 12:19 <eintopf> and say the people "I need exact the same but not from china pls"
2016-03-11 12:19 <eintopf> okay, I mean with china, not the cheapest parts
2016-03-11 12:19 <eintopf> which are available
2016-03-11 12:20 <eintopf> I think they all comming from china
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2016-03-11 12:27 <xiangfu> wpwrak: Hello
2016-03-11 12:31 <eintopf> hi
2016-03-11 12:32 <eintopf> https://www.conrad.de/de/elektrolyt-kondensator-radial-bedrahtet-5-mm-1000-f-25-vdc-20-x-h-10-mm-x-19-mm-yageo-se025m1000a5s-1019-1-st-445112.html
2016-03-11 12:32 <eintopf> one of them
2016-03-11 12:37 <wpwrak> xiangfu: heya !
2016-03-11 12:38 <eintopf> I have all
2016-03-11 12:38 <eintopf> maybe I should open the case at first and look into
2016-03-11 12:38 <wpwrak> eintopf: yageo is also a reputable company. so there's a chance they will last a little longer
2016-03-11 12:39 <eintopf> ok
2016-03-11 12:39 <wpwrak> eintopf: yes, open the case, take pictures, check if there's anything else that looks bad, write down all the values
2016-03-11 12:39 <eintopf> they have all what I need from yageo
2016-03-11 12:40 <wpwrak> eintopf: in any case, you want to see which parts actually need replacing. you don't have to replace just everything. some caps will be perfectly fine.
2016-03-11 12:40 <wpwrak> xiangfu: how's life ? :)
2016-03-11 12:41 <eintopf> wpwrak: okay, I know what you mean
2016-03-11 12:41 <eintopf> wpwrak: https://www.youtube.com/watch?v=JEuPP6FKNMc
2016-03-11 12:42 <wpwrak> eintopf: when you look at the picture of that cap from conrad you can see the lines on the top. looks a bit like a peace sign
2016-03-11 12:42 <wpwrak> ah yes, that :)
2016-03-11 12:43 <eintopf> I had some printer, then i heard some "puff and zzzzsss"
2016-03-11 12:43 <eintopf> I think then the elko was exploding
2016-03-11 12:43 <eintopf> btw: it doesn't work after that again
2016-03-11 12:43 <eintopf> I just needed the stepper motors from that printer
2016-03-11 12:49 <xiangfu> wpwrak: We order 10 of N900, we will receive them next week.
2016-03-11 12:50 <xiangfu> wpwrak: I am trying to order 250 of them. but it really depends. but I THINK i can make it 50 in next week.
2016-03-11 12:50 <xiangfu> wpwrak: The link you sent to me. they don't ship to China. :(
2016-03-11 12:50 <xiangfu> not sure if they are real or not. they reply the us. they just don't ship to China
2016-03-11 12:54 <eintopf> stupid question: can I measure elkos with a multimeter?
2016-03-11 12:56 <larsc> to find out the max voltage, just increase it, once it starts to smoke you found it
2016-03-11 12:59 <eintopf> I meant the capacitity
2016-03-11 12:59 <larsc> to get the capacity charge it up and then discharge over resistor and measure the time it takes to discharge
2016-03-11 12:59 <larsc> some multimeters might support this
2016-03-11 12:59 <eintopf> ah, ok.
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2016-03-11 13:00 <larsc> https://en.wikipedia.org/wiki/RC_time_constant
2016-03-11 13:00 <eintopf> http://www.pollin.de/shop/dt/NzA0OTYxOTk-/Messtechnik/Messtechnik/Multimeter/5_in_1_Digital_Multimeter_MASTECH_MS8229G.html
2016-03-11 13:00 <eintopf> I have that
2016-03-11 13:00 <eintopf> ohh, I know RC thing from study
2016-03-11 13:00 <eintopf> "low pass filter"
2016-03-11 13:01 <larsc> the datasheet says it can measure capacitance
2016-03-11 13:03 <wpwrak> xiangfu: sounds great ! are all those from the same source or different sources ?
2016-03-11 13:03 <eintopf> yes, 40/400 nF/4/40/100 µF, ± 3 %
2016-03-11 13:03 <eintopf> but elko's? I thought the small ceramic one only
2016-03-11 13:04 <eintopf> but I can't put the cermaic one into a normal power supply
2016-03-11 13:04 <larsc> if it is larger than 100uF it can't I guess
2016-03-11 13:04 <wpwrak> xiangfu: (don't ship to china) interesting :) but their whole shipping arrangement looked a little odd, so perhaps that isn't surprising
2016-03-11 13:04 <eintopf> ah, ok.
2016-03-11 13:04 <eintopf> so if I solder some damage elko, I will measure the capacity... just because I can
2016-03-11 13:04 <eintopf> and then check
2016-03-11 13:08 <wpwrak> eintopf: you'd need something like this: https://www.conrad.de/de/komponententester-voltcraft-lcr-100-101392.html
2016-03-11 13:09 <wpwrak> or you can just charge the cap to a known voltage, add a resistor to the terminals, measure the time it takes to discharge to a certain voltage, then do the math :)
2016-03-11 13:18 <wpwrak> eintopf: or this (cheaper, but without inductance): https://www.conrad.de/de/komponententester-digital-voltcraft-smd-200-cat-iii-600-v-anzeige-counts-6000-123007.html
2016-03-11 13:24 <eintopf> I think I just replace the ugly looking caps
2016-03-11 13:30 <wpwrak> yup, you can't go wrong with that :)
2016-03-11 13:32 <eintopf> I think I will cleanup my second workspace (currently there is a papercraft stardestroyer project) and then open the monitor
2016-03-11 13:32 <eintopf> I will take pictures for you!
2016-03-11 13:51 <eintopf> I open the case
2016-03-11 13:51 <eintopf> two little pieces are falling down from the case :(
2016-03-11 13:51 <eintopf> I think it will hold without it
2016-03-11 14:14 <eintopf> another thing got broken
2016-03-11 14:14 <eintopf> some cable connector safety mechanism
2016-03-11 14:15 <eintopf> I thought I helped a little bit with a screwdriver
2016-03-11 14:15 <eintopf> but it was to much
2016-03-11 14:15 <eintopf> https://www.dropbox.com/s/e9df2svwa8ll90b/IMG_20160311_151211.jpg?dl=0
2016-03-11 14:15 <eintopf> https://www.dropbox.com/s/i24c7g4vgerhss9/IMG_20160311_151218.jpg?dl=0
2016-03-11 14:16 <eintopf> wpwrak: https://www.dropbox.com/s/zlww8tiksajfj1y/IMG_20160311_151323.jpg?dl=0 - do they looking okay?
2016-03-11 14:18 <wpwrak> ah, try not to break connectors :)
2016-03-11 14:19 <eintopf> wpwrak: do you think it's okay?
2016-03-11 14:20 <eintopf> when I put it into that again
2016-03-11 14:22 <wpwrak> not sure about the caps. maybe try to have them in focus ?
2016-03-11 14:22 <wpwrak> i guess the connector will be fine
2016-03-11 14:25 <eintopf> wpwrak: https://www.dropbox.com/s/q04nc5ske9hpb1q/IMG_20160311_152438.jpg?dl=0
2016-03-11 14:27 <eintopf> two of them (at another position looks fine) but these five I need to replace them
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2016-03-11 14:47 <wpwrak> ah yes, they look rather suspicious
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2016-03-11 15:27 <eintopf> wpwrak: i have solder them all out
2016-03-11 15:27 <eintopf> it think i heat my fingers too
2016-03-11 15:27 <eintopf> was difficult :(
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2016-03-11 15:58 <wpwrak> yeah, properly cooking one's own fingers can be tricky :)
2016-03-11 16:04 <eintopf> no the last one was most difficult
2016-03-11 16:04 <eintopf> and I hope I added no new other connections
2016-03-11 16:35 <eintopf> I go to into the city now
2016-03-11 16:36 <eintopf> and buy the missing parts
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2016-03-11 20:23 <eintopf> I have all parts
2016-03-11 20:23 <wpwrak> now the fun begins :)
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2016-03-11 20:42 <eintopf> wpwrak: https://www.dropbox.com/s/64qugjlq6vepbni/IMG_20160311_214103.jpg?dl=0
2016-03-11 20:47 <wpwrak> pretty :) and now, the fireworks !
2016-03-11 21:03 <eintopf> done
2016-03-11 21:03 <eintopf> I try to connect it with power
2016-03-11 21:04 <wpwrak> whoa ! what was that flash at the horizon ?
2016-03-11 21:06 <eintopf> it works
2016-03-11 21:06 <eintopf> but I got a little shock
2016-03-11 21:06 <eintopf> when I touched the power button
2016-03-11 21:06 <eintopf> now I have fear
2016-03-11 21:08 <wpwrak> (works) great ! (shock) leave it turned on :)
2016-03-11 21:10 <eintopf> thank you all
2016-03-11 21:10 <eintopf> now I am not frustrated anymore each morning when starting the pc
2016-03-11 21:10 <eintopf> or comming back when the monitor was in sleep mode
2016-03-11 21:10 <eintopf> took 5 minutes to bring some picture
2016-03-11 21:11 <eintopf> now I need to clean the screen
2016-03-11 21:19 <eintopf> I put it again on the vesa connector
2016-03-11 21:19 <eintopf> need to readjust the vesa connector tomorrow
2016-03-11 21:19 <eintopf> but it works
2016-03-11 21:19 <eintopf> and picture is somewhat better than before
2016-03-11 21:32 <wpwrak> nice bonus :)
2016-03-11 21:34 <eintopf> now I want to repair more monitors
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