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Search: Posts Made By: caprider
Forum: General Capacitor Questions & Issues 05-16-2022, 06:49 AM
Replies: 9
Views: 448
Posted By caprider
Re: ESR 0.6Ω capacitance -15% absolute must change?

After comparing with a good PSU. I see that the bad one is not starting (when connecting PSON and PSKILL to ground). The good one starts the fan, LED turns green and all output voltages are there,...
Forum: General Capacitor Questions & Issues 05-16-2022, 04:33 AM
Replies: 9
Views: 448
Posted By caprider
Re: ESR 0.6Ω capacitance -15% absolute must change?

Useful questions, thank you. I will dig more for the answers.

Looking for the IC that does PWM I found several op Amps and a PIC.

Is it possible that this PIC is actually performing the PWM:...
Forum: General Capacitor Questions & Issues 05-05-2022, 05:40 AM
Replies: 9
Views: 448
Posted By caprider
Re: ESR 0.6Ω capacitance -15% absolute must change?

I have 383VDC on the capacitors.

And 242VAC on the bridge rectifier input (mains voltage).
Forum: General Capacitor Questions & Issues 05-04-2022, 01:37 PM
Replies: 9
Views: 448
Posted By caprider
ESR 0.6Ω capacitance -15% absolute must change?

I have one (of 3) hot swap Supermicro/Ablecom PWS-0050 SP382-TS server PSU that is mal functioning. Supermicro IPMI reports it as bad and led is orange on.

I took it apart tested transistors,...
Forum: General Electronics Technical Discussion 05-02-2022, 01:51 PM
Replies: 12
Views: 459
Posted By caprider
Re: FCL30A015 diode reverse biased shows 35 Ohm, 0.05V forward. Is it gone?

So with a 21W load (car light bulb) on 12V the diode only passes the right way. With zero Amps leaked when reverse biased.

I think the multimeter is misleaded because it leaks some current on low...
Forum: General Electronics Technical Discussion 04-30-2022, 03:56 PM
Replies: 12
Views: 459
Posted By caprider
Re: FCL30A015 diode reverse biased shows 35 Ohm, 0.05V forward. Is it gone?

I did test them with a 1k resistor and 32V from a lab power supply.

According to the PSU they take about 0.03 A when forward biased and 0.0 A when reverse biased.

So according to this test,...
Forum: General Electronics Technical Discussion 04-29-2022, 11:44 AM
Replies: 12
Views: 459
Posted By caprider
Re: FCL30A015 diode reverse biased shows 35 Ohm, 0.05V forward. Is it gone?

It's a PSU from a Supermicro server that has 3 hot swap power supplies (n+1). It might be a FSP PSU, IIRC, I'm away now and can't check. So nothing Russian in there. :)

Server is over 10 years old.
Forum: General Electronics Technical Discussion 04-29-2022, 01:44 AM
Replies: 12
Views: 459
Posted By caprider
Forum: General Electronics Technical Discussion 04-28-2022, 03:01 PM
Replies: 12
Views: 459
Posted By caprider
Re: FCL30A015 diode reverse biased shows 35 Ohm, 0.05V forward. Is it gone?

I am not so sure any more. I have 4 of these diodes in the PSU and all read about the same.

If I create a circuit with my lab PSU at 32V and a 1k ohm 50W resistor (the smaller resistors that I...
Forum: General Electronics Technical Discussion 04-28-2022, 01:45 PM
Replies: 12
Views: 459
Posted By caprider
FCL30A015 diode reverse biased shows 35 Ohm, 0.05V forward. Is it gone?

Hello,

I am troubleshooting a power supply.

When measuring a FCL30A015 diode it shows 35 Ohm when reverse biased and 0.05 forward voltage.

See attached.

The datasheet does say "Extremely...
Forum: General Electronics Technical Discussion 04-23-2022, 01:30 PM
Replies: 7
Views: 452
Posted By caprider
Re: chaper alternative to CL1850 CLIFF (mains quick connection)

I tried AliExpress with no success.
I've tried names used by CLIFF.

What search term should I use?
Forum: General Electronics Technical Discussion 04-23-2022, 12:49 PM
Replies: 7
Views: 452
Posted By caprider
chaper alternative to CL1850 CLIFF (mains quick connection)

This looks like a handy little tool for safely connecting to wires to mains while testing some device you're working on:
...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 01-22-2022, 07:01 PM
Replies: 12
Views: 1,172
Posted By caprider
Forum: General Electronics Technical Discussion 01-20-2022, 11:56 AM
Replies: 9
Views: 512
Posted By caprider
Re: Inductor or resistor

Thanks. I didn’t know coils have the inductance value color-coded.

Based on lines it’s 1mH.

Can I replace it in this power supply with a coil of 1500uH, 100mA, 25Ω?
Forum: General Electronics Technical Discussion 01-19-2022, 04:32 PM
Replies: 9
Views: 512
Posted By caprider
Re: Inductor or resistor

And how many ohms does it have?
I can’t decide if first and last colors are red/brown (maybe orange?).
Forum: General Electronics Technical Discussion 01-19-2022, 04:15 PM
Replies: 9
Views: 512
Posted By caprider
Re: Inductor or resistor

So they are both based on “How to diagnose and fix everything electronics” (attached). But what’s their main purpose: coil or resistor?
Forum: General Electronics Technical Discussion 01-19-2022, 03:45 PM
Replies: 9
Views: 512
Posted By caprider
Inductor or resistor

See attachment.

This blown component is connected to the output of a bridge rectifier on a SMPS.

It looks like a resistor (it has colored marking lines), but it is marked as L1 on the PCB,...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 01-17-2022, 03:46 PM
Replies: 16
Views: 1,087
Posted By caprider
Re: Desoldering station/gun above ZD-915/474A++ ?

@sam_sam_sam thanks for the extensive review!

I am leaning towards ZD-915, in spite of it being a budget tool, sounds almost fun to maintain and repair it. "Fun" because it will not be heavily...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 01-16-2022, 01:37 AM
Replies: 16
Views: 1,087
Posted By caprider
Re: Desoldering station/gun above ZD-915/474A++ ?

I read that 474A++ gets clogged easily and the tips oxidize quickly. How’s your experience been?

If I had to choose one of those, I’d choose ZD-915. But it has the hard-to-remove-tank problem and...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 01-16-2022, 01:15 AM
Replies: 12
Views: 1,172
Posted By caprider
Re: Recommendations of quality soldering station and (separate) hot air station

Why a knock off when you can get an original JBC (https://eleshop.eu/jbc-bt-2bwa-soldeerstation-140watt.html) at about the same price?
Forum: Equipment Usage, Soldering, Techniques, and Reviews 01-15-2022, 04:56 PM
Replies: 16
Views: 1,087
Posted By caprider
Lightbulb Desoldering station/gun above ZD-915/474A++ ?

Hello,

I've been looking for a desoldering station (with sucker pump) for THT in the 100€ +/- price range.

After reading and and watching a lot of reviews, I've noticed that...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 01-15-2022, 03:43 AM
Replies: 7
Views: 651
Posted By caprider
Re: Fluxes in Europe

European provider for all things electronics: https://tme.eu/
Forum: Equipment Usage, Soldering, Techniques, and Reviews 01-15-2022, 02:05 AM
Replies: 12
Views: 1,172
Posted By caprider
Recommendations of quality soldering station and (separate) hot air station

Hey,

I’m looking for some recommendations of a decent quality soldering station and a separate hot air station. I’m just a hobbyist, so even if (ultra)premium tools are not required, I still want...
Forum: Announcements & Related News 01-15-2022, 12:20 AM
Replies: 30,096
Views: 3,002,397
Posted By caprider
Re: New Members - please post your introductions here

Yellow,

I’m a software developer, but I’m here for electronics discussions. I’m a hobbyist and a beginner.

I’ve successfully created a couple of simple electronics projects, e.g. related to...
Showing results 1 to 24 of 24

 
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