Re: Dell P1110 21" CRT repair thread
ok I done a video of this monitor starting cold, no crackling or flashes this time
( sometimes it does not make)
as you can see the black is tinted in green, is out of brightness but this can't be noted very well in the video
I was exaggerating about taking 1 hour to full stabilize in good colors and normal brightness, it takes around 20-25 mins, I controlled using a clock
also another wrong thing I said is the monitor is based on the sony G500, according to the specs it seems is a sony G520...
laser
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Re: Dell P1110 21" CRT repair thread
thanks for your reply master
about the "big flash and cracking"... what the hell this could be,?a bad weld ?
the flyback? an aged cap?
I looked at the G board quicly and I don't noted any inflated cap
I will upload a video later showing my monitor starting cold before I make the IC 406 mod, then of course I will make a new video with the mod done to see the differences
if flashes and cracking still persist I will dismantle the G board to look around where...Leave a comment:
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Re: Dell P1110 21" CRT repair thread
BUMP
hello guys I have a monitor SUN 21 GDM-5410 , is the same monitor I believe is a sony CPD-G500 manufactured by SUN
long time ago I done a serial > TTL converter and I adjusted G2 several times because it goes out brightness frequently
This fuckiiing monitor is working fine but have the classic warm up time problem, it takes about 1 hour or so from cold start to normal brighntess
even when I turn on the monitor the screen goes totally green and there are big flashes and explosions until warms...Last edited by laser; 02-16-2016, 05:00 PM.Leave a comment:
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Re: Panasonic CEHFQ series datasheet ??
will fit because now I'm using 12.5 mm 2200 mf chemicon LXJ...Last edited by laser; 11-01-2014, 06:43 PM.Leave a comment:
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Re: Panasonic CEHFQ series datasheet ??
thanks master seems is the correct datasheet
btw,
what do you think: is this a good cap for the 12v line in a ATX power supply ?
...Leave a comment:
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Panasonic CEHFQ series datasheet ??
seems these series are old and discontinued but I want to know what kind of
caps are: low esr or long life ?
because I have one from junk, 16v 3300 mf maybe I will use it in a Antec power supply to rip 12v line
anyone have a datasheet or specs? thanksLast edited by laser; 11-01-2014, 04:12 AM. -
Re: Bad caps infestation in 21 trinitron monitor
in my samsung syncmaster there a a few chemicon caps but most of them are capxon caps which are total crap and were the ones which were bulged
I bet if you open your monitor which is from the same series than mine you will found those capxons
btw, I don't think that brightness problem is a combination of the drift-correction circuit interacting with the aging of the tube and the color-restoration feature....
I think is a myth, specially the myth of the firmware going corrupt ( it can't...Last edited by laser; 07-29-2014, 09:37 PM.Leave a comment:
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Re: Bad caps infestation in 21 trinitron monitor
thanks master for the reply and for all the links
I know about windas software etc even there is a resistor hack to cure partially brightness issue (resistor 459)
but I'm sure brightness problems is related to some caps losing capacitance over the time,
I'm sure replacing wasted caps the brightness will return to normality or near normality and there is no need to use windas software or the resistor hack
also I have a 21' samsung syncmaster monitor 1100mb,( no sony tube)...Leave a comment:
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Re: Bad caps infestation in 21 trinitron monitor
perhaps you are right, but that's the N board and haven't electrolytic caps
the only boards which have electrolytic caps are G and D
so which ones I must first starting to check/replace?...Last edited by laser; 07-22-2014, 06:26 AM.Leave a comment:
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Re: Bad caps infestation in 21 trinitron monitor
I don't understand what you are saying, if you can explain better...Leave a comment:
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Bad caps infestation in 21 trinitron monitor
Hi masters
I have a pair of 21 'trinitrons based monitors (sun GDM-5410)
1 of them works fine however it have the classic brightness problem which affects all trinitrons monitors, even in this case color restoration do not works, if I do it the monitor turns off
some ppl says is aging tube problem but I know is a capacitor issue
ok I dismantled one of them and I have not see any damaged or bulged cap, all the caps are chemicon and rubycons , excepting for the power supply big cap 450v 330mf which is a nichicon
The G board (easy to...Last edited by laser; 07-18-2014, 02:43 PM. -
Re: in ATX power supplies the more capacitance the less voltage
@mariushm
thanks the links and for the analysis
and yes all the caps I mentioned are all 6.3v
so your theory is the LOW ESR the less voltage.. ? is interesting
and you say that if I insert a 3300 cap high ESR will work great..OK
I will check this later
it happens in this PSU there is no place to fit caps larger than 1mm in size
and the ones at 1.25mm do not fit well
and in this moment I haven't a 3300uf cap high or normal esr to test this
...Last edited by laser; 08-08-2013, 12:46 PM.Leave a comment:
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Re: in ATX power supplies the more capacitance the less voltage
I used to believe idem theory as you until yesterday....it's a myth
lowering capacitance increase voltage which is good for stability
example: add more capacitance and my TV card don't works fine ( the TV image start to flash)
TV cards are the first ones to fail in a computer because a bad cap or low voltage
anyways
anyone can test what I'm saying...if anyone have a weak line in atx power supply can try adding or deducting capacitance and you will...Leave a comment:
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Re: in ATX power supplies the more capacitance the less voltage
@mariushm
I didn't drew some incorrect conclusions
please note that is very clear in this experiment that adding capacitance drops voltage in the 3.3 v rail
and it seems low esr or ultra low esr it does not change anything
in fact the 4700 uf KZE deliver less voltage than a 3300 uf MBZ and so on
despite you say that most of the things uses 12v, voltage of 12v is always here between 12.5v and 12.6 v ( never drops )
yet some things like TV cards uses 5v or 3.3v...Last edited by laser; 08-07-2013, 09:14 AM.Leave a comment:
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in ATX power supplies the more capacitance the less voltage
I have an Antec SP450 atx power supply in my PC and was very weak in the 3.3v line
the motherboard was reporting 3.1 v even sometimes the voltage dropped to 3.0v when I use my TV card or playing games
My PC is very power-hungry it have a core i5 95w,geforce GTX 560 (75w ), soundblaster X-FI ,TV card etc
OK trying to solve this I remember this power supply originally had on the 3.3 v rail comes with a fujityu 3300 uf buggy cap which I replaced with a rubycon 3300 mbz series
Then to solve the weakness in the 3.3v line the first step I did was removing... -
Re: ideal capacitance of ATX power supply in DC rails
chemicon KZE are low ESR I saw tons of them on motherboards
are those long life...are you sure?...Leave a comment:
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Re: ideal capacitance of ATX power supply in DC rails
yep...check:
[url]http://www.overclockers.com/forums/showthread.php?t=495380[/url]Re: ideal capacitance of ATX power s...t=495380[/url]...Last edited by laser; 04-03-2013, 01:14 PM.Leave a comment:
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Re: ideal capacitance of ATX power supply in DC rails
why not?...Leave a comment:
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Re: ideal capacitance of ATX power supply in DC rails
as I said in my previous post this Antec unit comes with lame fuhjyyu caps...I don't know if they were ESR or not ...I discarded all and replaced by Rubycon MBZ series which I consider the best ones...Leave a comment:
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Re: ideal capacitance of ATX power supply in DC rails
I'm not talking about moving the caps,I'm talking about adding more caps in parallel in the primary side to reinforce capacitance or just in case one of those in the secondary fail
Those good caps which I replaced could fail in the future because this unit works hot despite it have 2 fans..both are thermal controlled both works at low RPM... is a very silent unit
btw,
this Antec unit comes with buggy chinese fuhjyyu caps which some of them bulged then I replaced all by rubycon MBZ series...Last edited by laser; 04-03-2013, 11:03 AM.Leave a comment:
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