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Old 11-23-2018, 11:31 AM   #21
locojack
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Default Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

Does someone have the technical map of this power supply?
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Old 11-30-2018, 08:45 PM   #22
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Default Re: Thermaltake ATX supply goes BANG! - TR2 RX-750



Is this not a skid mark around this transistor? I do believe whatever this is has puked it's guts.
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Old 12-01-2018, 04:51 AM   #23
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Default Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

Quote:
Originally Posted by bcstedt View Post
Must be the lighting, I don't see any from here.
No

You have a lot of bad soldering joints when you see a ring around the joints those need to be reworked

I would recommend replacing all capacitors that are less than 100uf
at a minimum

It would be better if you replace all the caps except the the main capacitor
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Old 07-31-2020, 01:55 PM   #24
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Default Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

I had to pack up this project due to moving and am now getting back into the stash. I'm doing some more inspection and measurements and will respond shortly.

Anyone else have experience with this model PSU or similar?

Thanks for all the suggestions thus far.
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Old 07-31-2020, 08:16 PM   #25
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Default Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

Quote:
Originally Posted by everell View Post
Measure the voltage across the 400 volt input capacitor. If it measures 166 volts, the APFC (active power factor correction) circuit is not working.
Input cap voltage is 167V.
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Old 08-01-2020, 11:20 AM   #26
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Default Re: Thermaltake ATX supply goes BANG! - TR2 RX-750



Quote:
Originally Posted by RJARRRPCGP View Post
I definitely notice a gap in the solder joint right under R7!
R7 looks okay to me.

Quote:
Originally Posted by Behemot View Post
Also check the input cap for bulging, the top is rounded. May be just the plastic but better be sure.
Just the plastic insulator on top, all the caps look good (not by brand though, obviously).

I'm going to check the transistors for shorts and see what shows up.
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Old 08-01-2020, 11:50 AM   #27
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Default Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

Quote:
Originally Posted by bcstedt View Post
R7 looks okay to me.
It's below R7 and to the right of R6.
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Old 08-01-2020, 12:21 PM   #28
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Default Re: Thermaltake ATX supply goes BANG! - TR2 RX-750



Quote:
Originally Posted by RJARRRPCGP View Post
It's below R7 and to the right of R6.
Yeah that's a shadow, little dip in the solder.
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Old 08-01-2020, 01:32 PM   #29
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Default Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

Found some shorts!
Q7, Q8
D7, D?

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Old 08-01-2020, 08:00 PM   #30
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Default Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

Well, I found some of the bang! Looks like R9 spilled it's guts because ... ?





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File Type: jpg 20200801_205609c.jpg (541.6 KB, 33 views)
File Type: jpg 20200801_214006cu.jpg (216.0 KB, 36 views)
File Type: jpg 20200801_213945cu.jpg (59.8 KB, 36 views)
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Old 08-01-2020, 08:37 PM   #31
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Default Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

... Q5 and Q6 are shorted. 6R190C6



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File Type: jpg 20200801_222036cu.jpg (107.6 KB, 37 views)
File Type: jpg 20200801_221646cu.jpg (177.5 KB, 37 views)

Last edited by bcstedt; 08-01-2020 at 08:40 PM..
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Old 08-02-2020, 04:57 AM   #32
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Default Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

and q5 & 6 are driven by what?
that has to be checked next
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Old 08-02-2020, 12:35 PM   #33
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Default Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

Quote:
Originally Posted by stj View Post
and q5 & 6 are driven by what?
that has to be checked next
Driven by CM6800G!



Any thoughts on replacing the 6r190c6 with 20N60C3 or FCP20N60 (ON Semi) or ... ? I'm searching for details on issues or reliability related to these FETs and found a few situations where these substitutions were made. Also, in one review of this PSU they show the 20N60C3 instead of the 6r190c6.


Just curious.
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File Type: jpg hs_TR2_RX_750w_101.jpg (119.8 KB, 32 views)
File Type: jpg 20200802_142208ru.jpg (180.3 KB, 33 views)
File Type: jpg 20200802_142237ru.jpg (99.4 KB, 32 views)
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Old 08-04-2020, 05:32 PM   #34
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Default Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

Yeah me thinks IPx60R190C6 and 20N60 look like equivalents.

Think that 500V FET should be fine as well, it's two-forward when it has CM6800 without even looking, and most of them usually only had 18N50s (or 20N50s when over 600 W). Depends on what you can find around.
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