Hello here in Cuba, is very common to use Huntkey 460W PC PSU, it have 6800 and TNY279, all friends tell to check TNY it usually die. It show short to GND from VCC, optocoupler line , and VCC zener show short but are OK. Only the TNY in one i be fixing.

Likes(0)Dislikes(0)

Thank you too Yogesh.

Best Regards

Likes(0)Dislikes(0)

Thanks for sharing your experience and for good explanations.

Likes(0)Dislikes(0)

The Blue ESR meter is good to measure resistors for people that don't have a good DMM. I trust my Brymen 869s more for resistors. The Blue ESR meter can test batteries also.

Likes(0)Dislikes(0)

Hi Robert

Well, components’ sellers are (at least not always) electronics’ technicians and they do that…
I recommended the same meter to George. I own it as well and I am satisfied with it. I am also quite satisfied with the analog one I built about fifteen years ago. It has an amazing accuracy for an analog circuit that is. Just wonderful. And the DC blocking capacitor in its input allows me to measure caps with the unit under repair powered from mains. It can reject effectively the 120Hz component after the rectification…I bought the Blue ESR only to make comparisons with that one!
I know the EDS-88A. In fact this is the one I intended to buy in the first place but I preferred the Blue ESR because of its numerical display, which renders it more flexible because one can measure sub-ohm resistors with higher accuracy than that of any ordinary multimeter.
Recently I bought a LCR bridge which is just amazing! Among its other characteristics it is capable of measuring sub-ohm resistances with an accuracy down to one mΩ level (!!), for the cost of 120$ only (including its basic accessories), plus the transporting expenses (sent from Japan). I also classified all the unknown coils and transformers I had in stock, spares from destroyed PC PSUs, for any likely use of them in repairs or in hobby constructions…

Greetings

Likes(0)Dislikes(0)

I am glad to hear that Albert. Also I am looking forward for your article. “Big troubles have (almost always) insignificant causes”… Remember? When you informed me that the fuse was intact I was sure about that. Once again this proved to be true…

Likes(1)Dislikes(0)

Hi Paris,
Yes, that is true. I always make sure new caps are good also. I have never found a brand new e-cap to be bad, but I am new to electronics and don't repair as a business. It's hard to believe that anyone would be stupid enough to go yanking on the e-caps like that, though I know that there are people like that. I cut them also like you do.
I would recommend that his first ESR meter to be a Blue ESR meter. Plus he can get the kit and gain more experience soldering. After looking inside my Blue ESR meter that I bought complete, I would recommend the kit. The soldering inside mine looked atrocious, so I re-soldered everything and added some IC sockets.
I also have a EDS-88A Series II DCR/ESR meter from Electronic Design Specialists Inc.. It is expensive, but very nice. I usually only use it for SMD caps.

Likes(2)Dislikes(0)

Paris I just fixed today one of my P.F.C. PSU's with the (F)AN4800 and TNY277 controlled Supplies. Thanks to you I noticed this 5Volt standby circuit around the TNY277 and a Transformer. It wasn't active, there was no 5V that came indirect from the BIG 400-450V Capacitor through a defect resistor. After I replaced the 4.7 Ohm 1/4 Watt (yellow purple 2x gold black) and the shrinksocket around it the supply is working like new.
A new repair article has born. I will show all photos and the schematic I had drawn to find the 5V Standby circuit.
Cheers!

Likes(2)Dislikes(0)

Hey Ulises

Thank you for your kind words and your support. George, after testing some cheap ESR meters, decided to buy a good one. I have also built my own meter, long ago, implementing a schematic I found in the web and works fine. Its display is analog, but nevertheless it meets the requirements for electrolytic capacitor testing. Thank you again.

Greetings

Likes(1)Dislikes(0)