Re: Help me repair a TT850W PSU
i will surely check every psu that comes into my hands for that IC
if anything new should happen, i'll let you know
thanx again
KAMENi
Member
Last Activity: 04-06-2009, 06:30 PM
Joined: 09-09-2008
Location: near Zagreb, Croatia
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Re: Help me repair a TT850W PSU
unfortunately, i didn't find this IC anywhere in Zagreb, and no shop can order one.
i4004, thank You very much for the best intentions, but i'll have to say no to your offer. it's not my PSU and my cousin doesn't want to send it
thank You anyways
if someone should happen to run into a store that has this IC in its offer, please tell me their website, or contact via e-mail so i can order it
once again, thanx for all the help and support from both of You, Gianni and...Leave a comment:
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Re: Help me repair a TT850W PSU
i'll try to replace the IC if they can order one. if not, i will send it to i4004
thanks for your support guys
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Re: Help me repair a TT850W PSU
all 3 secundary points have 0.2 ohm to groundLeave a comment:
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Re: Help me repair a TT850W PSU
i didnt exactly unsolder the IC itself, i unsoldered the whole PCB board with it. it's 1 in x 1 inLeave a comment:
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Re: Help me repair a TT850W PSU
i have tried loading only 12v and it works normal (i connected old cpu fan). you know what load on 5v does. i didn't try on 3.3v because i didnt think the fan would start working on so low voltage.
do you think i can check the transformer myself? if i find it malfunctioning, i can get it rewound so that wouldnt be a problem
p.s. i can still solder the IC back on while i'm waiting for the shop to let me know if they can get itLeave a comment:
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Re: Help me repair a TT850W PSU
of course, I cant find this IC anywhere in Zagreb.
i have asked a shop if they can order it, but they'll let me know on monday, tuesday.Leave a comment:
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Re: Help me repair a TT850W PSU
i have unsoldered the ic1. it's a cm6800g.
i'll post the results when i replace it.
if anyone has any other ideas, you're all welcome to share them
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Re: Help me repair a TT850W PSU
i doubt it can be the transformer because if it were malfunctioning it wouldnt give out -5v either
i will replace the ic1 ASAPLeave a comment:
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Re: Help me repair a TT850W PSU
i keep it on when there is no load.
once i connect anything to 5v wire, it shuts down after 1 or 2 seconds topLeave a comment:
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Re: Help me repair a TT850W PSU
could it be that powergood is blown and "thinks" that it's not good?Leave a comment:
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Re: Help me repair a TT850W PSU
is there a way i can make the psu stabile so i can make some more measuring?Leave a comment:
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Re: Help me repair a TT850W PSU
there are 3 of them under that bunch of wires, all 3 are 2200uF and 16V and all look the same. none bloated or anything
only, i can't read what manufacturer is it. they are the same as the 2 on the pics above, only those are 6.3V
it appears they are chemi-conLeave a comment:
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Re: Help me repair a TT850W PSU
all 3 of them look normal. i can post some more pics...Leave a comment:
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Re: Help me repair a TT850W PSU
again it failed.
it measured 0.07v ac (on 2v DMM)
i tried it in a old socket A mbo. it was running for few seconds than decided to shut down
voltage was normal till that point. i can't force it to work longer for me to make thorough measuring
any more ideas besides the primary side?Leave a comment:
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Re: Help me repair a TT850W PSU
on AC it measured 0.009v for both 12v and 5v (on 2v AC on DMM)Leave a comment:
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Re: Help me repair a TT850W PSU
i replaced the capacitors. i'm putting the psu back together, and will post results when i try it
here are some pics of the unit
[URL=http://i39.photobucket.com/albums/e195/_KAMENi/napajanje1.jpg][/URL]
[URL=http://i39.photobucket.com/albums/e195/_KAMENi/napajanje2.jpg][/URL]
[URL=http://i39.photobucket.com/albums/e195/_KAMENi/napajanje3.jpg][/URL]
[URL=http://i39.photobucket.com/albums/e195/_KAMENi/napajanje4.jpg][/URL]
[URL=http://i39.photobucket.com/albums/e195/_KAMENi/napajanje5.jpg][/URL]Leave a comment:
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Re: Help me repair a TT850W PSU
sorry for not responding. i've been busy preparing few exams.
i hope i'll have time this weekend to replace the 2 caps and take some pics for upload
i must admit, i didn't think of measuring AC voltage when it was connected
regarding the replaced Q1. i will leave it the way it is because i don't have equipment to measure what's going on around it, so i'll say it's working fine
i'll focus on repairing the secondary side (with your help, of course)Leave a comment:
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Re: Help me repair a TT850W PSU
tranistor is blown. i found it to be Q1 on the scheme.
didn't check the components around it
this is what i refer to as PS tester:
[url]http://www.vemil.hr/opis.aspx?prikaziTemplate=0&Sifra=7710025[/url]
i replaced the damaged transistor and tried the PS in my cpu. it first managed to enter BIOS, and after restart didn't do nothing.
then i plugged my digital multimeter in the +5v and gnd wires of a molex and it said 3.7V
unfortunately i dont have a scope to see the waveform, so i'm pretty...Leave a comment:
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Re: Help me repair a TT850W PSU
is there noone to comment on this problem? i don't expect a straight solution, just a good discussion
i know that i don't have the good scheme, so i'm using the one i have just for referal
please, anyone?Leave a comment:
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