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Search: Posts Made By: stj
Forum: Troubleshooting Audio Equipment Today, 09:48 AM
Replies: 9
Views: 31
Posted By stj
Re: Sony CFS-B11 Radio cassette boom box

check the input to the amp i.c. - it could be cutting out from an internal fault.
Forum: Troubleshooting Game Consoles & Other Weird Devices Today, 08:51 AM
Replies: 18
Views: 234
Posted By stj
Re: Xbox 1.6 Motherboards and Polymer Capacitors

not chimp - you need something that supports TITAN.
https://github.com/gaasedelen/titan

https://fatxplorer.eaton-works.com/

btw, make a new ribbon cable using ATA133 80pin cable & connectors....
Forum: General Electronics Technical Discussion Today, 04:52 AM
Replies: 14
Views: 80
Posted By stj
Re: flourescent ballast resistance

i think it's 9w
but i have lots of spare PL in 7w - 11w, they used to be popular in retrofitted stuff.

i had an idea,
i will short the 2 pins on the ballast,
then connect the mains cable to a...
Forum: Troubleshooting Game Consoles & Other Weird Devices Today, 04:48 AM
Replies: 18
Views: 234
Posted By stj
Re: Xbox 1.6 Motherboards and Polymer Capacitors

the dvd drives are trash in xboxes,
i used to replace them with modified pc drives.
i cant remember the details right now.
you dont need the drives anymore anyway,
there is pc software that can...
Forum: Troubleshooting Game Consoles & Other Weird Devices Today, 03:30 AM
Replies: 17
Views: 244
Posted By stj
Re: Graco ST MAX II 495 PC PRO , paint spray machine help

some conformal coating disolves with white spirit.
Forum: General Electronics Technical Discussion Today, 03:23 AM
Replies: 14
Views: 80
Posted By stj
Re: flourescent ballast resistance

you asked for it.
this is the lid of a countertop vending machine
notice how the lamp is between the top housing and a colour filter to illuminate the goods.
ignore the tape and led lights - thats...
Forum: General Electronics Technical Discussion Today, 03:19 AM
Replies: 14
Views: 80
Posted By stj
Re: flourescent ballast resistance

that sounds more reasonable for a coil - thats why i started the thread
Forum: General Electronics Technical Discussion Today, 03:16 AM
Replies: 18
Views: 210
Posted By stj
Re: Reading input and output of bridge rectifier on the same scope?

weller (and hakko, etc.) should just make world models
removeable cables and multi-tapped transformers with a selector-switch.
(and a fucking fuse!)

if the japanese hifi companies could do it in...
Forum: General Electronics Technical Discussion Today, 03:13 AM
Replies: 18
Views: 210
Posted By stj
Re: Reading input and output of bridge rectifier on the same scope?

the scope groundclip was probably decent copper - your jumper may have been copper coated aluminium or steel.

that said, pull the rubber boot back on the groundclip and inspect where the wire...
Forum: Troubleshooting Game Consoles & Other Weird Devices Today, 03:06 AM
Replies: 18
Views: 234
Posted By stj
Re: Xbox 1.6 Motherboards and Polymer Capacitors

thats electrically fine, does the diameter match the pads on the board?

btw, you got these consoles in a bad way - do they boot and run?
if not then dont go mad on them till they do - just...
Forum: General Capacitor Questions & Issues Today, 02:53 AM
Replies: 1
Views: 30
Posted By stj
Re: 3300F 450V caps...

make an electric chair for communists - that uses a stored charge to not overload a domestic supply!
:D

dont forget to include inrush limiting.
Forum: General Electronics Technical Discussion Yesterday, 05:47 PM
Replies: 14
Views: 80
Posted By stj
Re: flourescent ballast resistance

it's a philips PL tube,
totally dead - maybe it's a bad lampholder or broken wire.
the problem is it fits into a tight housing - and the light is used in all directions.
so no room to use an...
Forum: General Electronics Technical Discussion Yesterday, 03:15 PM
Replies: 14
Views: 80
Posted By stj
Re: flourescent ballast resistance

component tester says: 141.6 ohms 3.35 henrys

hmm - doesnt sound like shorted windings.
Forum: General Electronics Technical Discussion Yesterday, 03:08 PM
Replies: 14
Views: 80
Posted By stj
Re: flourescent ballast resistance

no, it uses a glow-starter, just an oldschool 2 wire ballast
Forum: General Electronics Technical Discussion Yesterday, 01:46 PM
Replies: 14
Views: 80
Posted By stj
flourescent ballast resistance

what should a 13w magnetic ballast look like?
i have a setup playing dead here - ballast is reading 148ohms
that seems high but i have no other ballasts to compare against anymore!
Forum: Equipment Usage, Soldering, Techniques, and Reviews Yesterday, 11:18 AM
Replies: 1,118
Views: 184,527
Posted By stj
Re: ESR meter upgrades

not seen those before,
the ones i refered to are all one colour.
i think the blue has splines on the shaft, the light green has the half-moon shaft type.
i call it that anyway :D
Forum: General Electronics Technical Discussion Yesterday, 11:16 AM
Replies: 18
Views: 210
Posted By stj
Re: Reading input and output of bridge rectifier on the same scope?

the BNC's on chinese scopes are mounted through tin shielding - your not burning that out!
Forum: General Electronics Technical Discussion Yesterday, 05:44 AM
Replies: 18
Views: 210
Posted By stj
Re: Reading input and output of bridge rectifier on the same scope?

did it even have a thermal fuse in the transformer?
i cant remember.
Forum: Equipment Usage, Soldering, Techniques, and Reviews Yesterday, 02:17 AM
Replies: 9
Views: 303
Posted By stj
Re: Short finder

no, we need the revised scematic with the new current-source
Forum: Equipment Usage, Soldering, Techniques, and Reviews Yesterday, 02:15 AM
Replies: 128
Views: 18,073
Posted By stj
Re: New tool to find short capacitors on motherboards : shorty with display

can you get linear regulaters operating at sub-volt range?
these testers use very low voltage to avoid turning semiconductors on.
Forum: Troubleshooting Game Consoles & Other Weird Devices Yesterday, 02:14 AM
Replies: 18
Views: 234
Posted By stj
Re: Xbox 1.6 Motherboards and Polymer Capacitors

just a normal high temperature one - i use panasonic FR for just about everything i fix..
Forum: General Electronics Technical Discussion Yesterday, 02:10 AM
Replies: 18
Views: 210
Posted By stj
Re: Reading input and output of bridge rectifier on the same scope?

remind me again, you have 2 channels or 4 on your scope?
Forum: Equipment Usage, Soldering, Techniques, and Reviews 06-27-2022, 12:37 PM
Replies: 1,118
Views: 184,527
Posted By stj
Re: ESR meter upgrades

was the encoder blue?
i buy the light green ones - they seem better quality
Forum: Troubleshooting Game Consoles & Other Weird Devices 06-27-2022, 09:58 AM
Replies: 18
Views: 234
Posted By stj
Re: Xbox 1.6 Motherboards and Polymer Capacitors

remember to throw away the super-caps near the ribbon connector
the 1.6 wont boot without something there, so put 220uf or 470uf 16v in it's place.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 06-27-2022, 07:01 AM
Replies: 7
Views: 118
Posted By stj
Re: Grr... stupid DPAKs.

before i had hot air,

desolder and slightly lift each leg
put a bit of solder on the end of the iron and hold it on the tab.
eventually the component will slide down and you can extract it
Showing results 1 to 25 of 500

 
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