looking for smd resistor component
looking for smd resistor component
Can anybody guess the type of SMD in the picture.. Are both zero ohms registers?
I broke an 8TB haddisk by connecting a wrong modular sata cable.
I hope i can repair the pcb by replacing two 000 resistors.
any advice on solder and flux i should use ?
I broke an 8TB haddisk by connecting a wrong modular sata cable.
I hope i can repair the pcb by replacing two 000 resistors.
any advice on solder and flux i should use ?
Igor
Acorn Electron, BBC Master 128, Acorn Archimedes A3000
Acorn Electron, BBC Master 128, Acorn Archimedes A3000
Re: looking for smd resistor component
Without something definite to give a sense of scale it is hard to be certain. The pins of the IC look like those of a SOIC device with 0.05" lead pitch. On that basis the resistors appear to be 0603 parts. I'm not sure about the device with a square on it. It seems to be in parallel with a 0 ohm part. It should also be easy to check for 0 ohms - if it's still acting as a short circuit then I don't think changing it will fix the problem.
Re: looking for smd resistor component
Thx for your repley. I ordered 0603 0 ohm resistors. i hope that wil fix it.
Igor
Acorn Electron, BBC Master 128, Acorn Archimedes A3000
Acorn Electron, BBC Master 128, Acorn Archimedes A3000
Re: looking for smd resistor component
It worked !!! I used my camera as a microscope. I enabled the function magnify when zooming and set it the time to magnify to endless.
it wasn't pretty but the endresult was functional. The zero omhs resistors function as fuses. These ristors were connected to the 5 v input. The incompatible sata cable probably had 12V on the 5v input so never use cables for a modular PSU that did not originaly came with that PSU. Lessons learned the hard way.
it wasn't pretty but the endresult was functional. The zero omhs resistors function as fuses. These ristors were connected to the 5 v input. The incompatible sata cable probably had 12V on the 5v input so never use cables for a modular PSU that did not originaly came with that PSU. Lessons learned the hard way.
Igor
Acorn Electron, BBC Master 128, Acorn Archimedes A3000
Acorn Electron, BBC Master 128, Acorn Archimedes A3000
Re: looking for smd resistor component
Just to point something out... a zero ohm resistor is other wise known as 'wire'. You don't need to order anything, just replace the 0ohm resistor with a short bit of wire
BBC Bs, Master 128s, Master Compact, and Electrons, and an A3000 with an ARM3
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Re: looking for smd resistor component
Yes, but at what current would the wire act as a fuse?...
Mark
Mark
For a "Complete BBC Games Archive" visit www.bbcmicro.co.uk NOW!
BeebWiki - for answers to many questions...
Fault finding index • Acorn BBC Model B minimal configuration • Logic Levels for 5V TTL Systems
BeebWiki - for answers to many questions...
Fault finding index • Acorn BBC Model B minimal configuration • Logic Levels for 5V TTL Systems
Re: looking for smd resistor component
given that a 0603 SMD can handle best part of 2amp, and a piece of 28awg wire can handle 1.25A or two strands of 30awg kynar would carry 1.6A
yes it would act as a fuse
yes it would act as a fuse
BBC Bs, Master 128s, Master Compact, and Electrons, and an A3000 with an ARM3
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Re: looking for smd resistor component
This table says that the fusing current for 28AWG size copper wire is 14.5A
Even if this data source is not entirely accurate, the fusing current is considerably higher than the maximum rated current carrying capacity, which appears to be what you have stated.
Mark
Even if this data source is not entirely accurate, the fusing current is considerably higher than the maximum rated current carrying capacity, which appears to be what you have stated.
Mark
For a "Complete BBC Games Archive" visit www.bbcmicro.co.uk NOW!
BeebWiki - for answers to many questions...
Fault finding index • Acorn BBC Model B minimal configuration • Logic Levels for 5V TTL Systems
BeebWiki - for answers to many questions...
Fault finding index • Acorn BBC Model B minimal configuration • Logic Levels for 5V TTL Systems
Re: looking for smd resistor component
True I guess , 38awg then lol
BBC Bs, Master 128s, Master Compact, and Electrons, and an A3000 with an ARM3
Don’t Panic and Always Carry a Towel
Don’t Panic and Always Carry a Towel
Re: looking for smd resistor component
Yeah, zero ohms can be linked with bits of wire.
What's more confusing is how 0 ohm smd parts still have a mW rating......
What's more confusing is how 0 ohm smd parts still have a mW rating......
David