"Maciej W. Rozycki" wrote:
> On Thu, 3 Feb 2022, Peter Coghlan via cctalk wrote:
>
>> Today I finally managed to check it out. The ceramic F4A mains input fuse
>> beside the power switch on the back panel had blown. When I opened it up,
>> I found a POWER-ONE MAP80-4000 power supply. The main ch
On Thu, Feb 03, 2022 at 06:06:10PM +, Peter Coghlan via cctalk wrote:
> Today I finally managed to check it out. The ceramic F4A mains input fuse
> beside the power switch on the back panel had blown. When I opened it up,
> I found a POWER-ONE MAP80-4000 power supply. The main chopper transi
With that much carnage, I'd probably drop a Mean-Well module in there. I
believe there would be enough room for one or two in the IGS I have (taller
white box, divider "shelf" over the mainboard, I don't know if there was a
lower profile model).
Thanks,
Jonathan
--- Original Message --
Phil Blundell wrote:
>
> Does that PSU have a PWM controller IC, or is it built entirely from
> discretes?
> If there is an IC driving the chopper transistor then you may be able to get
> some clues about the likely characteristics of the transistor from the IC
> datasheet.
>
It's all discretes.
What's a "Mean-Well module"? I somehow find myself imagining:
"I put a new module in my router. It blew up. At least it meant well" :-)
(My IGS has the rather heavy and over-engineered divider shelf with the
main board underneath and the fan and power supply above.)
Regards,
Peter Coghlan
J
Mean-Well is a maker of drop in power supplies. They sell a wide variety of
sizes and output configurations. The supplies are (mostly) not expensive,
though not as cheap as something you might dig up on e.g. AliExpress. They also
won't burn your house down :)
The name is rather unfortunate.
Al
I'm going through a few of my ESDI and MFM hard drives and ran across 2
Maxtor XT 2190 drives with all of the Drive Id's (1-4) tie together with 1
long
jumper and the drives have the write protect jumper is installed. Not sure
what theywould have been used for ??? Both are the same.
Jerr
On Sat, 5 Feb 2022, Peter Coghlan via cctalk wrote:
> > This PSU seems to have been used across various Cisco devices and I had
> > one fail several years ago in a WS-C1202 Ethernet/FDDI switch, also having
> > suffered from leaking caps. Back then RS still had it in stock at a hefty
> > pric
On 2/5/22 17:13, Jerry Wright via cctalk wrote:
> I'm going through a few of my ESDI and MFM hard drives and ran across 2
> Maxtor XT 2190 drives with all of the Drive Id's (1-4) tie together with 1
> long
> jumper and the drives have the write protect jumper is installed. Not sure
> what
