6 May
2007
6 May
'07
10:03 p.m.
I found the problem with my PCW8256--it's an open "IC protector",
part ICP-N75. Rated at 2.7A. Am I safe in replacing it with a far-
easier-to-find-here-in-the-USA 3A picofuse? "IC protectors" must
be an across-the-pond thing--I've never seen one of these before--
what are they, other than a fuse?
Cheers,
Chuck
6 May
6 May
10:24 p.m.
I found the problem with my PCW8256--it's an open "IC protector",
Our messages crossed :-). As you'll now see, I'd dug out schematics,
described the cirucit, and suggested you check that IC protector
part ICP-N75. Rated at 2.7A. Am I safe in replacing
it with a far-
easier-to-find-here-in-the-USA 3A picofuse? "IC protectors" must
I think so (butI am not legally responsible, OK :-)). This one is just
in zeries with one of the secondaries of the chopper transformer --
between the transformer and the half-wave rectifier diode.
Incientally, how do you get it as 2.7A?
be an across-the-pond thing--I've never seen one
of these before--
what are they, other than a fuse?
They're quite common in consumer electronics over here. I don't think
they're particularly a European thing -- they're often found in
far-eastern stuff.
AFAIK they are just fast-acting wire-ended fuses. Nothing really special
about them.
-tony
11:04 p.m.
On 6 May 2007 at 23:24, Tony Duell wrote:
Incientally, how do you get it as 2.7A?
http://www.electronicsic.com/fuse.htm
...and a host of other places. From what I can garner from the Rohm
website, "N" means "normal blow"; "F" means "fast
blow".
AFAIK they are just fast-acting wire-ended fuses.
Nothing really special
about them.
I was hooking an older 5.25" drive onto the interface and I suspect
the draw may have been a bit much. I'll give the PF 3 a go, since
I've got a pile of those.
Looks like this is sort of a poor man's overcurrent detector. :(
Cheers,
Chuck
11:58 p.m.
On 6 May 2007. Tony said--
AFAIK they are just fast-acting wire-ended fuses.
Nothing really
special
about them.
The PF3 did the trick! I dropped the idea of a 5.25" on the PCW
(maybe later when the mood strikes me to add a PSU for the drive) and
found a Teac FD235F with a READY jumper that seems to work just fine.
Now the PCW seems to hate my (incorrectly formatted) disks just fine.
Are there any images of bootable PCW diskettes posted anywhere? I'm
not wild about Locoscript, but CP/M might be useful.
Cheers,
Chuck
6457
days inactive
6457
days old
3 comments
2 participants
participants (2)
-
ard＠p850ug1.demon.co.uk -
cclist＠sydex.com