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Search: Posts Made By: stj
Forum: Troubleshooting Game Consoles & Other Weird Devices Yesterday, 02:27 AM
Replies: 60
Views: 8,474
Posted By stj
Re: Post your worthless and/or pointless repairs

0805? easy.
0603 is where i draw the line.
Forum: Troubleshooting Power Supplies and Power Supply Design Yesterday, 02:25 AM
Replies: 22
Views: 633
Posted By stj
Re: Compaq PDP-121P - Baked MOV

if it's shorted to the gate then you need to check the gate-drive circuit too.
Forum: Troubleshooting Power Supplies and Power Supply Design 04-18-2021, 12:51 PM
Replies: 6
Views: 228
Posted By stj
Re: Lexmark x264dn Laser Printer won't power on, Power Supply Delta EADP-100AF CB REV

it's probably the same,
delta psu part numbers usually indicate the wattage.
so the power used is the same.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 04-18-2021, 06:52 AM
Replies: 19
Views: 908
Posted By stj
Re: repairing traces...on a fine pitch board?

pointless?
do you know how expensive used dimms are becoming?

new stuff costs far less than used ddr or ddr2.
Forum: General Electronics Technical Discussion 04-18-2021, 06:49 AM
Replies: 3
Views: 62
Posted By stj
Re: Theory behind "sometime works, sometime doesn't"

crystals are a special case - you always want the area around them perfectly clean.
any capacitance between the pins or from the pins to anything else - even a long track with nothing on it will...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 04-17-2021, 05:17 PM
Replies: 11
Views: 165
Posted By stj
Re: 878d H-E Error

some of the soldering is total shit - even has splashes on the board!!
Forum: General Computer & Tech Discussion 04-17-2021, 05:15 PM
Replies: 20
Views: 547
Posted By stj
Re: Apple 2 europlus , characters on screen help

btw, check inside the psu for bad caps.
and RIFA's
Forum: Equipment Usage, Soldering, Techniques, and Reviews 04-17-2021, 11:50 AM
Replies: 11
Views: 165
Posted By stj
Re: 878d H-E Error

did you solder or change anything on the main board??
Forum: General Computer & Tech Discussion 04-17-2021, 07:31 AM
Replies: 20
Views: 547
Posted By stj
Re: Apple 2 europlus , characters on screen help

that still looks like a vram problem - or the associated circuits.
got any multiplexers like 74ls157, 158, 257 or 258 on the board?
Forum: General Electronics Technical Discussion 04-17-2021, 02:18 AM
Replies: 35
Views: 383
Posted By stj
Re: Kind of a different question...

apple: "that's not electricity your feeling, it's euphoria from the joy of owning apple"
:D
Forum: Equipment Usage, Soldering, Techniques, and Reviews 04-16-2021, 05:25 AM
Replies: 8
Views: 203
Posted By stj
Re: Nood to Replace small QFN very close to DIMM sockets - suggestions?

shield the sockets with tin-plate
i use old tuner covers.
and consider heating the underside first.
Forum: General Electronics Technical Discussion 04-15-2021, 04:06 PM
Replies: 35
Views: 383
Posted By stj
Re: Kind of a different question...

no, they are just using the backing to secure a thermal fuse.
Forum: General Electronics Technical Discussion 04-15-2021, 04:02 PM
Replies: 1
Views: 61
Posted By stj
Re: What's the use use of these things?

fiberglass sleeving.
you use it if you think something in or against it could get hot.
Forum: General Electronics Technical Discussion 04-15-2021, 07:31 AM
Replies: 35
Views: 383
Posted By stj
Re: Kind of a different question...

maybe you can just replace the 2pin socket with a cloverleaf style
Forum: General Electronics Technical Discussion 04-15-2021, 07:30 AM
Replies: 9
Views: 158
Posted By stj
Re: LED Resistor Calculations ...

got a link to the leds?
i get 6.6ohm for 3v and 150ma
Forum: Troubleshooting Power Supplies and Power Supply Design 04-15-2021, 03:56 AM
Replies: 22
Views: 633
Posted By stj
Re: Compaq PDP-121P - Baked MOV

when you fit a mov - put it in heatshrink sleeving btw.
that way if it blows again it wont burn the board or spread soot everywhere.
Forum: General Electronics Technical Discussion 04-15-2021, 03:54 AM
Replies: 7
Views: 129
Posted By stj
Re: DDR2 resistor packs... 0804?

buying 4??
you'l be lucky - last time i needed arrays like that i had to buy a bag of 100 :(
Forum: General Electronics Technical Discussion 04-15-2021, 03:53 AM
Replies: 35
Views: 383
Posted By stj
Re: Kind of a different question...

the metal in the socket bit is probably just for strength.
meter the resistance between that stud and the macbook body with the charger connected.
Forum: General Capacitor Questions & Issues 04-15-2021, 03:47 AM
Replies: 2
Views: 72
Posted By stj
Re: Old Cap Series ID in Toyota ECU

strange that they used multiple makes.
can you post a pic of the whole board - i'd like to see where the caps are.
Forum: General Capacitor Questions & Issues 04-15-2021, 03:44 AM
Replies: 11
Views: 481
Posted By stj
Re: Help! Need to replace capacitor on expensive motherboard.

yes, 270uf - your right.
depending on your standoff/case height you may be able to fit the cap on the other side of the board!
Forum: General Electronics Technical Discussion 04-14-2021, 09:00 PM
Replies: 35
Views: 383
Posted By stj
Re: Kind of a different question...

but is that stud actually earthed, or just for strength?
Forum: General Electronics Technical Discussion 04-14-2021, 02:13 PM
Replies: 35
Views: 383
Posted By stj
Re: Kind of a different question...

simple,
when you have a real man's electrical supply you run everything at half the current for the equivelent wattage.
so your cables, switches, breakers etc are cheaper and more compact.
you...
Forum: General Electronics Technical Discussion 04-14-2021, 10:10 AM
Replies: 35
Views: 383
Posted By stj
Re: Kind of a different question...

you need to ground the psu or the laptop

because here 340vdc hurts more than your 168v!
Forum: Troubleshooting Audio Equipment 04-14-2021, 08:00 AM
Replies: 2
Views: 1,093
Posted By stj
Re: Clarion FZ104PA stereo has no lights and dark LCD display.

it may be an idea to see if you can replace the lamps with leds and resistors.
Forum: General Electronics Technical Discussion 04-14-2021, 07:58 AM
Replies: 35
Views: 383
Posted By stj
Re: Kind of a different question...

lol
2pin charger is it?

welcome to modern switching psu design.
the mains input is connected to the 0v lead to the laptop via a ceramic cap!!!
i'v said in a lot of threads that these fucking...
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