zunasthegreat
Senior Member
Last Activity: 09-10-2024, 05:39 AM
Joined: 12-18-2017
Location: Euro-Fail
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The bulk has decent ESR and the capacity is really good around 320~330uF, the dead 20N60C belong to the PFC circuit system. Someone on another post said about removing the DC-1982 board from the PSU to make it PFC-less. The AC voltage here is 220V so I guess it will still work without PFC. -
Chieftec GPS-450-AA with dead 20N60C3
Hello everyone hope all doing well!
I have this PSU (GPS450-AA delta oem) around for like 4-5 years and I had it recapped early 2020 or 2021 with mostly UCC KY and Nichicon PW's. The bulk was and still is fine, the original Ltec's were bloated and empty. The previous issue was some major coil whine noise and at times random shutdowns when going idle. Today it started tripping the mains breaker and I think I have dead APFC mosfets (20N60C3). Right now upon checking I have the Q1 and Q3 FETs dead so far and I guess those are responsible for the PFC circuit. The only thing I care is If there... -
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 problem is their 10mm diameter. The 12V ones should be 2200uf 16V 10mmx30mm, the 3.3V/5V ones should be 3300uf 10V and those exist in 10mmX30mm size.
You live in Slovenia so I guess u can ask user: Behemot for cap replacements.Last edited by zunasthegreat; 02-26-2022, 07:01 AM.Leave a comment:
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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.Leave a comment:
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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 standby led is still on and the 5VSB looks fine at 5.05V, the PSU does the same 1-2sec fan spin and will switch off. It will do it on any board run for 1-2sec and then switch off. I even re-installed the old S20C40C but that made no difference. Primary caps Transistors etc look fine.Leave a comment:
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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 fine for a bit with voltage hitting ~3.4V. It started doing it after like 2h of usage.
The original caps had TUL CE branding without any other info, 2200uf 10V for 3.3V+5V. All caps are near ~3000uf with very high vloss so I swapped them with GP caps and on the 2nd round with some KY/PW, no change in high 3.3V with any cap setup. It was there with the originals too.
The 5Vsb...Last edited by zunasthegreat; 11-07-2021, 09:18 AM. -
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 3300uf and 16V 2200uf ones for 12V line. This model came with Niccon and the other SL-550 had ChengX GR. Looks OK so far no funny hiss sound on the P4 test pc with a 9600 XT under stress.Leave a comment:
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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 [URL="https://www.badcaps.net/forum/showthread.php?t=89606"]thread[/URL]. Upon checking for similarities I finally found the 2nd long lost 12V Filter cap, a 16V 100uf near the Fan connector. The new model has no PCIe cables but comes fully *loaded* with ChengX CAPS, no bulged or funny leaks just increased capacity atm (4-5y of use). Upon bench-testing them with the 750Ti I found this odd behavior. New unit works just fine...Leave a comment:
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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....Leave a comment:
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Re: Chieftec GPS-550AB-A (Delta OEM)
8-pin IC is the DL0165R and main transistors are .... 13007.Leave a comment:
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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 KY). This SL-8500BTX is from the crap bunch with just a MBR2060CT for 12V a fake? transformer and some uber-crap fan. Changed the stock 470uf (350uf real) primary caps with a set from the DR-8600BTX and some mixed quality filter caps. The million dollar question, any point to change that 12V 2060CT for a 30100CT ?...Leave a comment:
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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 ones". There is a version of this PSU with Passive-PFC, mine doesn't have one and fan seems to be hooked @ 12V.
3rd photo is from before the "proper" re-cap....Leave a comment:
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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 the DMM gives 1KΩ, I think I'll have to measure it out of the board....Leave a comment:
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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 3.3V and placed a 33Ω (2W) on the 5V. 12V still has a 330Ω but I've moved that res. near the 12V fan header and I've added another 2200uf 16V cap for the 12V.
This will be the end of tampering this gutless FORCE 450W as another champion is about to arrive ... a DR-8600BTX
Last edited by zunasthegreat; 06-05-2021, 04:40 PM.Leave a comment:
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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 the psu under testing with a 16V HD 2200uf. Realistically the weak link on this unit will never be its caps anymore ... something else will make this psu to proceed into oblivion. Btw some old (branded?) 5V heavy psu's with 15A Label @ +12V had in stock a single 1500uf cap for filtering.Last edited by zunasthegreat; 06-03-2021, 06:40 AM.Leave a comment:
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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.Last edited by zunasthegreat; 06-03-2021, 03:28 AM.Leave a comment:
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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 ?Last edited by zunasthegreat; 06-02-2021, 01:06 PM.Leave a comment:
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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 for the extra endurance will it be any better with a PW/HD 2200uf 16V instead ?Last edited by zunasthegreat; 06-02-2021, 04:31 AM.Leave a comment:
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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 crap brand OFC
)
For stage 3 I'll probably switch 13007's with some spare 13009's and I might update the 3.3V S10C45C. Btw I have some SBL2040CT and S16C45C, which is the more viable update if any ?
The best part is that It boots fine (for how long???) on the test-pc with Phenom II X4 OC'ed @ 3.4GHz...Last edited by zunasthegreat; 06-01-2021, 12:32 PM.Leave a comment:
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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 screwed the top of the PSU it started singing again ... looked to me like some kind of AC freq noise so I put the 450W laber on the inside where the "bulk" caps-ac part is, hiss sound now is officially gone and the 12V SBR has the plastic washer that always wanted.Last edited by zunasthegreat; 05-31-2021, 02:12 PM.Leave a comment:
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