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Search: Posts Made By: zunasthegreat
Forum: Troubleshooting Power Supplies and Power Supply Design 02-26-2022, 06:58 AM
Replies: 14
Views: 1,049
Posted By zunasthegreat
Re: PSU weaken - occasional reset

Those are Teapo SC, very mediocre caps that really hate heat. 9 years of usage ... these gonna show way bumped capacity (3300uf showing 4000uf) and some might even be in the range of pF. The biggest...
Forum: Troubleshooting Power Supplies and Power Supply Design 12-27-2021, 03:41 PM
Replies: 2
Views: 717
Posted By zunasthegreat
Re: AXP AXP-500P12P 3.3V line issue

The fix was either the TL431 or the 2SA1015 transistor, replaced one more zener nearby that seemed dodgy and PSU works fine again.
Forum: Troubleshooting Power Supplies and Power Supply Design 11-08-2021, 09:12 AM
Replies: 2
Views: 717
Posted By zunasthegreat
Re: AXP AXP-500P12P 3.3V line issue

Update: After some playing with the load resistor for 3.3V (50ohm) the psu worked for like ~1h on the same P5PL2 with very stable 3.3V line @ ~3.4V but at some point it switch off. The mainboard...
Forum: Troubleshooting Power Supplies and Power Supply Design 11-07-2021, 09:15 AM
Replies: 2
Views: 717
Posted By zunasthegreat
AXP AXP-500P12P 3.3V line issue

Hello all

I have this PSU from a friend, it has very high 3.3V line output (3.55-3.6V) on the DMM that makes most boards buzzer beep and shut off. Once a while on some old P4 board (P5PL2) it run...
Forum: Troubleshooting Power Supplies and Power Supply Design 07-08-2021, 05:45 AM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

Same caps on both models dunno whats the deal with it. I'm now testing it with only 1X 12V SBR (MBR20200CT), stock had 2X Mospec F12C20C. Also swapped for 10th time the 5V caps and I now use 10V PW...
Forum: Troubleshooting Power Supplies and Power Supply Design 07-06-2021, 05:35 AM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

I recently got for cheap a 750 Ti with an Inter-tech SL-550 PSU. This PSU is 95% same as the NitroX from my other thread (https://www.badcaps.net/forum/showthread.php?t=89606). Upon checking for...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-12-2021, 07:23 AM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

All small Caps look dodgy and one koshin 47uf 50V shows ESR ... 6.9Ω on the meter. Put a new "fattier" 1K resistor and some nichicon caps and now works just fine.
Forum: Troubleshooting Power Supplies and Power Supply Design 06-12-2021, 02:16 AM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

8-pin IC is the DL0165R and main transistors are .... 13007.
Forum: Troubleshooting Power Supplies and Power Supply Design 06-11-2021, 02:43 PM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

Another familiar SL-8500BTX that needs some care. Any clue which of the two 47uf caps is the critical one for the 5VSB transistors ? I'll have to use 47uf 10V there or choose 100uf 16V ones (PW or...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-07-2021, 11:47 AM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

This is the "mighty" DR-8600BTX I talked earlier, use to have bulged JungFu WG caps I think. Did a partial re-cap on it with GP caps 1-2 years ago and now changed most of them again with "proper...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-07-2021, 02:28 AM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

CWT 405W with PCB discoloration, traces under the pcb that start to crack upon de-soldering and many dead caps. There is a strange burned resistor that looks awful under the C2 cap. Upon checking on...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-05-2021, 04:39 PM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

I messed around a bit with the load resistors and made some changes just for heat reduction near the CAPS. Stock load seemed kinda low-ish for 3.3V (10Ω) and 5V (20Ω).
Ι've switch the 20Ω to the...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-03-2021, 06:39 AM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

Also changed the critical 1uf cap with a nichicon PJ 2.2uf. It was the cap next to the 2 BJT's I think, also changed some 47uf caps with some spare old stock. For the +12V cap situation I have now...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-03-2021, 03:08 AM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

Hmm I think I can move that load resistor where the cabling for 12V + GND solder and on the resistor location I can put a slim KY 1000uf 16V or 2X HV 1500uf 16V.
Forum: Troubleshooting Power Supplies and Power Supply Design 06-02-2021, 12:44 PM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

Any point adding an X cap (0.22uf 275V) across L-N where AC cord goes ? No room on the pcb anyway ...
Regarding Y caps those without CE are fire hazard I guess, should I get 4.7nf 250V or 400V ?
Forum: Troubleshooting Power Supplies and Power Supply Design 06-02-2021, 04:30 AM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

Upon checking for better 12V cap I found the following 16V in the cap-bag : HD 2200uf 16V and PW 2200uf 16V.

I have nothing better than that VY with 3300uf @ 16V, my 3300uf's PW/HD are 10V. Just...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-01-2021, 12:28 PM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

"Stage 2" updates

1.New AWG 18 braided 4-pin CPU connector
2.New 8cm fan with better airflow
3.Added more molex cabling
4.Different set of 200V primary caps with some extra capacity (still...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-31-2021, 02:10 PM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

Did another try with a washer on the SBR and this time the finding is lets say interesting. Upon having the psu without its top cover there was no hiss or pitch sound while running the pc. Once I...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-30-2021, 01:57 PM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

Original owner paid 9.99€ 5y ago, he gave it for free for further testing. He also said some quality comments back then based on the fact that he had to use onboard GPU to boot with this gem "450W"...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-29-2021, 09:05 AM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

Another prospect that needs care

This gutless Force 450W was 9.99 5 years ago, worked for like 30minutes in total. The owner said this glorious unit would not make it into windows or would bsod...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-17-2021, 05:33 AM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

Yeap mag amp has different drawing on the GPS model. Probably user drawn error.
Forum: Troubleshooting Power Supplies and Power Supply Design 05-16-2021, 11:17 AM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

I tried FJ 3300uf 6.3V on that Delta made 550AB and it works fine so far. The interesting part is that I also tried two of those caps on my APS-550S (different OEM) and it could start. It made a...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-15-2021, 03:13 AM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

Thanks for all the knowledge and help very much appreciated. Btw checking reviews (https://www.techpowerup.com/review/be-quiet-pure-power-11-fm-650-w/3.html)I see expensive PSU units with really...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-14-2021, 10:05 PM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

I think some other key component might gone out of spec too, the +12V caps had no juice left at all. Another strange fact now is that the user said at some point that he had 2 HDD's gone bad. Could...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-11-2021, 01:41 PM
Replies: 39
Views: 4,485
Posted By zunasthegreat
Re: Chieftec GPS-550AB-A (Delta OEM)

I just removed some of the low esr caps and the "hot" boot issue is fixed so far.

+12V has now a Lelon RGA 3300uf 16V & nichicon HV 1500uf 16V
+5V has nichicon HD 3300uf 10v & nichicon VY 1000uf...
Showing results 1 to 25 of 73

 
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