Component identification

[weirdah]

I don't know what exactly are you asking me, I measured voltage in the motherboard connector and posted results above, as well as IDE power connectors and floppy ones. Where should I measure the voltage?

 

[weirdah]

Are you asking me to test for example isa bus voltages?

 

[weirdah]

Edited: Posted by error

 

[weirdah]

I connected the PSU to the motherboard and tested between black and orange and red wires in IDE connector. Voltages are unestable and lower than normal, it can be also noticed on the PSU fan as it doesn't get enough power to completely spin.

If I disconnect the PSU from the motherboard voltages seem to be as I posted before, and PSU fan spins correctly.

 

[Nigel Goodwin]

I don't know what exactly are you asking me, I measured voltage in the motherboard connector and posted results above, as well as IDE power connectors and floppy ones. Where should I measure the voltage?

You need a load - if it's not plugged into a working computer you need some other kind of load, the classic method is BIG wirewound resistors. Assuming it regulates from the 5V line, a 2.5 ohm 10W (or higher) resistor should do and draw 2A.

 

[gophert]

Put a "sandbar" 10w 10 ohm resistor across the 5v rail. It will draw 0.5A and allow the regulator to stabilize the voltage.

 

[weirdah]

I think one of those 2 resistors I show would be valid, right?
Brown, Black, Orange, Gold = 10k Ohm
Red, red, orange, gold = 22k Ohm

Thanks again!

 

[Mickster]

Those are probably 1/4W

You need something like this:

Uxcell a11111600ux0214 10W 10 Ohm 5% Winding Ceramic Cement Power Resistor, x 5: Amazon.com: Industrial & Scientific

Uxcell a11111600ux0214 10W 10 Ohm 5% Winding Ceramic Cement Power Resistor, x 5: Amazon.com: Industrial & Scientific

www.amazon.com

Or this:

uxcell 2 Pcs Aluminum Case Resistor 10W 10 Ohm Wirewound for LED Converter with Rod Post 10W10RJ: Amazon.com: Industrial & Scientific

uxcell 2 Pcs Aluminum Case Resistor 10W 10 Ohm Wirewound for LED Converter with Rod Post 10W10RJ: Amazon.com: Industrial & Scientific

www.amazon.com

 

[weirdah]

Ok, I don't have this kind of resistors, I will get a couple of them for testing asap.

By the way, the pc POST without expansions, floppy, hdd, tape drive... but I'm not sure if voltage is stable enough as it does not perform well with floppy, hdd...

Thanks!

 

[weirdah]

I tested on the board connector with psu on.

Red: 5,5v
Red: 5,5v
Black: Ground
Black: Ground
Black: Ground
Black: Ground
Orange: 12,6v
Gray: 0,7v
Yellow: 0,02v
White: 5,20v

Condensers get 6,24v except one that gets 5.20v (I suppose it may cause the reboot problem).