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Search: Posts Made By: stj
Forum: Equipment Usage, Soldering, Techniques, and Reviews Today, 04:34 AM
Replies: 1
Views: 350
Posted By stj
Re: solder mask question

?? use a brush! :D
Forum: Troubleshooting Power Supplies and Power Supply Design Today, 04:32 AM
Replies: 5
Views: 174
Posted By stj
Re: Can a failed input smoothing capacitor destroy the switching IC?

yes, it could blow the viper chip.
and it really should be 47uf anyway!!
Forum: Troubleshooting Game Consoles & Other Weird Devices Yesterday, 03:05 PM
Replies: 3
Views: 937
Posted By stj
Re: Celestron Telescope Motor Controller SMD Cap ID help

eeprom?
i suspect those stickers have a couple of microcontroillers under them!
Forum: Troubleshooting Game Consoles & Other Weird Devices Yesterday, 03:03 PM
Replies: 7
Views: 94
Posted By stj
Forum: General Electronics Technical Discussion Yesterday, 03:01 PM
Replies: 13
Views: 1,764
Posted By stj
Re: I am in need of a 80 buck converter that is adjustable rated 4 amps or better

one of the psu makers, i think kunkin makes one that is 5a 120v
Forum: General Computer & Tech Discussion Yesterday, 08:31 AM
Replies: 5
Views: 228
Posted By stj
Re: Reusing an old laptop screen

how do you program it?
you have to tell these things the panel spec.
some use jumpers - others use firmware uploads.
Forum: Troubleshooting Game Consoles & Other Weird Devices Yesterday, 04:33 AM
Replies: 3
Views: 937
Posted By stj
Re: Celestron Telescope Motor Controller SMD Cap ID help

0.1uf ceramics.
too large for 0.01uf
unless one shorts out, they are fine.
what's the issue?
Forum: Troubleshooting Game Consoles & Other Weird Devices 02-27-2021, 04:18 PM
Replies: 6
Views: 390
Posted By stj
Re: Xbox One dead LAN IC

it contains several 1:1 isolation transformers and sometimes some ceramic caps and/or resistors.
Forum: Troubleshooting Game Consoles & Other Weird Devices 02-27-2021, 11:37 AM
Replies: 6
Views: 390
Posted By stj
Re: Xbox One dead LAN IC

nice!
that's a magjack, the transformer has arced and burned up.
probably from lightning.

you need to remove it, and check all the small resistors.
and the inductor.
everything in the area...
Forum: Troubleshooting Game Consoles & Other Weird Devices 02-27-2021, 10:03 AM
Replies: 6
Views: 390
Posted By stj
Re: Xbox One dead LAN IC

you should also check the network transformer - unless it uses a magjack.
Forum: General Electronics Technical Discussion 02-27-2021, 07:46 AM
Replies: 10
Views: 231
Posted By stj
Re: Another Dead CFL...that seemed to have lasted.

if you need high wattage cfl's then the chinese have loads on ebay/ali including high-cri ones for fotographic studios.
those arent cheap btw! :D
Forum: Troubleshooting Audio Equipment 02-27-2021, 07:32 AM
Replies: 3
Views: 1,299
Posted By stj
Re: ONKYO TX-SR607 ; FL Tube LCD Replacement ?

look for electrolytic caps connected with it.
if you find one, try using a 1uf polyester in it's place.
Forum: General Electronics Technical Discussion 02-26-2021, 08:45 PM
Replies: 10
Views: 231
Posted By stj
Re: Another Dead CFL...that seemed to have lasted.

if it flashed, maybe the heaters burned out.

usually the heaters go open or the electrolytic dries out in the ones that die here.
Forum: Troubleshooting Computer Displays 02-26-2021, 04:27 PM
Replies: 1
Views: 153
Posted By stj
Forum: Troubleshooting Power Supplies and Power Supply Design 02-25-2021, 01:17 PM
Replies: 2
Views: 118
Posted By stj
Re: Ultra 350w ATX Power Supply

not arc'ing, that's conductive glue - glue that got old and went very dark and then burns
you need to chip off all brown glue - then do the caps
Forum: General Electronics Technical Discussion 02-25-2021, 01:09 PM
Replies: 16
Views: 338
Posted By stj
Re: Help substituting avalanche diode

not hard to find.
it's D907
Forum: General Electronics Technical Discussion 02-25-2021, 10:08 AM
Replies: 47
Views: 790
Posted By stj
Re: Oscilliscopes

do you get the spikes without any probes?

btw, try to find the cause - it will effect other stuff like radio.
i suspect it's a low current psu - like an led lamp.
Forum: Troubleshooting Game Consoles & Other Weird Devices 02-25-2021, 03:34 AM
Replies: 9
Views: 3,972
Posted By stj
Re: Sony Phat PlayStation PS2 power supply repair

nichicon HD's - that's the most common caps in ps2's
Forum: General Electronics Technical Discussion 02-24-2021, 07:01 PM
Replies: 8
Views: 180
Posted By stj
Re: How to read PCB symbol for 6 pin push-pull switch?

if thats your power switch then indentation towards the lcd display
Forum: General Electronics Technical Discussion 02-24-2021, 02:31 PM
Replies: 5
Views: 112
Posted By stj
Re: Switch selection

pictures, or it didnt happen! :D
Forum: General Electronics Technical Discussion 02-24-2021, 10:52 AM
Replies: 47
Views: 790
Posted By stj
Re: Oscilliscopes

well if you think it's a problem, go ask tautech i think he's called, on eevblog.
he's a siglent rep
Forum: General Electronics Technical Discussion 02-24-2021, 10:48 AM
Replies: 29
Views: 403
Posted By stj
Re: Question on AC grounding - found an old device that has me confused

the tv card hack was very well known in europe,
it was dos software called "voyager"
it linked over a com port and a level shifter.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-24-2021, 10:41 AM
Replies: 4
Views: 1,547
Posted By stj
Re: Any good discount electric desoldering pumps?

filters are a robbery, you can make your own better ones.
that said, thereare a number of threads here about "upgrades".
from changing the fan and it's power, to making filter discs, to adding an...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-23-2021, 09:25 AM
Replies: 4
Views: 1,547
Posted By stj
Re: Any good discount electric desoldering pumps?

zongdi ZD-915 is good.
costs about €60 if you look hard enough - average price €100
Forum: General Capacitor Questions & Issues 02-23-2021, 04:57 AM
Replies: 5
Views: 271
Posted By stj
Re: Nichicon PC(M) replacement

i would try to see what the caps do.
are they just smoothing dc, or on a dc/dc convertor output? or signal blocking?
Showing results 1 to 25 of 500

 
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