Faulty Freeview box

When I came to install a new digibox, it runs for about 2 minutes then cuts
out. If I leave it for a few minutes, it wall start again, but soon shuts
down again.
The supplier sent a replacement no problem, but didn't want the faulty one
returning.
Mainly out of curiosity, would it be fix-able? I'm guessing some sort of
thermal cut-out thing(?)

As you can see, my knowledge of electronics is limited, but I can wield a
soldering iron, if I know what component needs replacing.

Regards,
Neil

"Neil" wrote in message
...
When I came to install a new digibox, it runs for about 2 minutes then
cuts out. If I leave it for a few minutes, it wall start again, but soon
shuts down again.

Tut. It *will* start again

"Neil" wrote in message
...
When I came to install a new digibox, it runs for about 2 minutes then
cuts out. If I leave it for a few minutes, it wall start again, but soon
shuts down again.
The supplier sent a replacement no problem, but didn't want the faulty one
returning.
Mainly out of curiosity, would it be fix-able? I'm guessing some sort of
thermal cut-out thing(?)

As you can see, my knowledge of electronics is limited, but I can wield a
soldering iron, if I know what component needs replacing.

If it is overheating, take the top off the box and run it in an area with
lots of air flow. If it still cuts out, it's something else

tim

Is it one with a remote psu? Is it perhaps one of the newer tiny almost as
small as the plug type?

If yes to both, then find out what its spec is and fit a new one. I already
have a graveyard of switch mode crap supplied with various bits of kit, and
a good analogue unit may well be heavier, and get a bit warm, but seem not
to cut out, put clicks on the output and otherwise do silly things like
generatee huge amounts of rfi.

Just my findings on modern small 'efficient' power supplies.
Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"Neil" wrote in message
...
When I came to install a new digibox, it runs for about 2 minutes then
cuts out. If I leave it for a few minutes, it wall start again, but soon
shuts down again.
The supplier sent a replacement no problem, but didn't want the faulty one
returning.
Mainly out of curiosity, would it be fix-able? I'm guessing some sort of
thermal cut-out thing(?)

As you can see, my knowledge of electronics is limited, but I can wield a
soldering iron, if I know what component needs replacing.

Regards,
Neil

In article ,
Brian Gaff wrote:
If yes to both, then find out what its spec is and fit a new one. I
already have a graveyard of switch mode crap supplied with various bits
of kit, and a good analogue unit may well be heavier, and get a bit
warm, but seem not to cut out, put clicks on the output and otherwise
do silly things like generatee huge amounts of rfi.

Just my findings on modern small 'efficient' power supplies.

Without one you'd probably not be posting here. ;-)

--
*How can I miss you if you won't go away?

Dave Plowman London SW
To e-mail, change noise into sound.

"Brian Gaff" wrote in message
m...
Is it one with a remote psu? Is it perhaps one of the newer tiny almost as
small as the plug type?

If yes to both, then find out what its spec is and fit a new one. I
already have a graveyard of switch mode crap supplied with various bits of
kit, and a good analogue unit may well be heavier, and get a bit warm, but
seem not to cut out, put clicks on the output and otherwise do silly
things like generatee huge amounts of rfi.

Just my findings on modern small 'efficient' power supplies.
Brian

It's daft how manufacturers supply decent kit with inadequate wall warts.
None time out of ten when some little telly or whatever pack up its the PSU.

Bill

In article ,
Bill Wright wrote:
It's daft how manufacturers supply decent kit with inadequate wall
warts. None time out of ten when some little telly or whatever pack up
its the PSU.

I've got loads of wall warts left over from equipment that fails. Kept in
case needed. That says it is the reverse here.

--
*Middle age is when it takes longer to rest than to get tired.

Dave Plowman London SW
To e-mail, change noise into sound.

"Dave Plowman (News)" wrote in message
...
In article ,
Bill Wright wrote:
It's daft how manufacturers supply decent kit with inadequate wall
warts. None time out of ten when some little telly or whatever pack up
its the PSU.

I've got loads of wall warts left over from equipment that fails. Kept in
case needed. That says it is the reverse here.

No it doesn't. I've got a box of wall warts as well. All different voltages
and amperage capabilities. Just because the PSU is often the first thing to
fail doesn't mean there won't be times when the main item fails first.

Some of these things are rated at 1,500mA, 12V, yet they are only as big as
a matchbox. You can't miniaturise the Watt.

I regard my box of PSUs with scepticism. Often when re-used they fail
quickly.

Bill

In article ,
Bill Wright wrote:
I've got loads of wall warts left over from equipment that fails. Kept
in case needed. That says it is the reverse here.

No it doesn't. I've got a box of wall warts as well. All different
voltages and amperage capabilities. Just because the PSU is often the
first thing to fail doesn't mean there won't be times when the main item
fails first.

Then I'd remember buying new ones. ;-)

Some of these things are rated at 1,500mA, 12V, yet they are only as big
as a matchbox. You can't miniaturise the Watt.

You certainly can make PS smaller. Imagine a PC one that wasn't an SMPS?
It would fill the box...

I regard my box of PSUs with scepticism. Often when re-used they fail
quickly.

Perhaps you need to take them into a corner and give them a good talking
to.

--
*What boots up must come down *

Dave Plowman London SW
To e-mail, change noise into sound.

Dave Plowman (News) wrote:
In article ,
Bill Wright wrote:
I've got loads of wall warts left over from equipment that fails. Kept
in case needed. That says it is the reverse here.

No it doesn't. I've got a box of wall warts as well. All different
voltages and amperage capabilities. Just because the PSU is often the
first thing to fail doesn't mean there won't be times when the main item
fails first.

Then I'd remember buying new ones. ;-)

Some of these things are rated at 1,500mA, 12V, yet they are only as big
as a matchbox. You can't miniaturise the Watt.

You certainly can make PS smaller. Imagine a PC one that wasn't an SMPS?
It would fill the box...

I regard my box of PSUs with scepticism. Often when re-used they fail
quickly.

Perhaps you need to take them into a corner and give them a good talking
to.


SMPS is much harder to design well mainly for EMC, but also for
reliability. In fact I've seen many SMPS units with much longer
lifetimes than linear units used on STBs. I used to have some linear
unit as a teenager and occasionally left them plugged in without a load,
from memory 2 melted.

Other problems I have seen are the SMPS not being matched to the unit
for start up current, causing tripping out cycles even though the SMPS
is rated for the continuous current. Mostly the cheap ones are just
noisey, they claim EMC compliance by themselves with a resistive load,
but as soon as you put on a complex load it emits all over the place,
nevermind affecting sensitivity of the receiver.

A well designed SMPS is the dogs ******** for efficiency, size,
reliability etc. Anyone can design and produce cheap crap,... and many do.

--
Tony