Fuse Replacement

[Keith W]

I know very little about the technical side of electronics but I can use a
soldering iron. I have two external hard drive cases which use what
"appear" to be identical power supplies. Said power supplies reduce the
current from 240volts AC to the required supply for the hard drive which is
12volts and 5 volts both at 2A which I assume means 2 amp. The sign beside
each is a bar with three dots beneath it which I assume means DC. Although
the power supplies look identical and have the same connectors it appears
that the wiring to the connectors does not match. I inadvertently plugged
the wrong power supply into one of the drive cases and the power supply
ceased working. I have opened the case and found that a fuse, which was
soldered into the circuit board, has blown. I am quite confident that I
could solder a replacement in and I am sure that I can get one in Maplin's
(English version of Radio Shack) but I do not know the technical description
for the part. Can anybody advise what component I should be asking for
please.
--
Keith W
Sunbury on Thames

 

[Franc Zabkar]

On Fri, 24 Jul 2009 17:10:52 +0100, "Keith W"
<invalidaddress@invalidaddress.invalid> put finger to keyboard and
composed:

I know very little about the technical side of electronics but I can use a
soldering iron. I have two external hard drive cases which use what
"appear" to be identical power supplies. Said power supplies reduce the
current from 240volts AC to the required supply for the hard drive which is
12volts and 5 volts both at 2A which I assume means 2 amp. The sign beside
each is a bar with three dots beneath it which I assume means DC. Although
the power supplies look identical and have the same connectors it appears
that the wiring to the connectors does not match. I inadvertently plugged
the wrong power supply into one of the drive cases and the power supply
ceased working. I have opened the case and found that a fuse, which was
soldered into the circuit board, has blown. I am quite confident that I
could solder a replacement in and I am sure that I can get one in Maplin's
(English version of Radio Shack) but I do not know the technical description
for the part. Can anybody advise what component I should be asking for
please.

Picofuse?
Circuit protector, Semiconductor Fuse, eg ICPN50, ICPF50?

If your hard drive has seen +12V on its +5V rail, then you will
possibly find a shorted TVS (transient voltage suppression) diode near
its power connector.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Keith W]

"Franc Zabkar" <fzabkar@iinternode.on.net> wrote in message
news:7djn65hbpgoiat6l99rjhgo7cg8rc2locq@4ax.com...

On Fri, 24 Jul 2009 17:10:52 +0100, "Keith W"
invalidaddress@invalidaddress.invalid> put finger to keyboard and
composed:

I know very little about the technical side of electronics but I can use a
soldering iron. I have two external hard drive cases which use what
"appear" to be identical power supplies. Said power supplies reduce the
current from 240volts AC to the required supply for the hard drive which
is
12volts and 5 volts both at 2A which I assume means 2 amp. The sign
beside
each is a bar with three dots beneath it which I assume means DC.
Although
the power supplies look identical and have the same connectors it appears
that the wiring to the connectors does not match. I inadvertently
plugged
the wrong power supply into one of the drive cases and the power supply
ceased working. I have opened the case and found that a fuse, which was
soldered into the circuit board, has blown. I am quite confident that I
could solder a replacement in and I am sure that I can get one in Maplin's
(English version of Radio Shack) but I do not know the technical
description
for the part. Can anybody advise what component I should be asking for
please.

Picofuse?
Circuit protector, Semiconductor Fuse, eg ICPN50, ICPF50?

If your hard drive has seen +12V on its +5V rail, then you will
possibly find a shorted TVS (transient voltage suppression) diode near
its power connector.

Thanks Franc. Now I can go into Maplin's with a chance of making myself
understood.
--
Keith W
Sunbury on Thames