sci.electronics.repair - 10 new messages in 4 topics - digest

sci.electronics.repair
http://groups.google.com/group/sci.electronics.repair?hl=en

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Today's topics:

* Canon A420 camera - 4 messages, 3 authors
http://groups.google.com/group/sci.electronics.repair/t/11a9e31849085804?hl=en
* UPS battery life - 4 messages, 3 authors
http://groups.google.com/group/sci.electronics.repair/t/b73fd839ce17fb50?hl=en
* I Don't Get It! - 1 messages, 1 author
http://groups.google.com/group/sci.electronics.repair/t/a367b736ad25687d?hl=en
* MESMARISING VIDEOS&HOT PHOTOS - 1 messages, 1 author
http://groups.google.com/group/sci.electronics.repair/t/ff5fc5cceeefa201?hl=en

==============================================================================
TOPIC: Canon A420 camera
http://groups.google.com/group/sci.electronics.repair/t/11a9e31849085804?hl=en
==============================================================================

== 1 of 4 ==
Date: Sun, Jan 2 2011 2:33 pm
From: adrian@poppyrecords.invalid.invalid (Adrian Tuddenham)

John Keiser <john.keiser2@hawaiiantel.net> wrote:

> Is this in all modes - Auto, Program, etc?

It seems to be.

Even using it with the manual exposure at its darkest setting gives
over-exposure and a coarse 'raster' effect.

I have now noticed that the display has a slight flicker which I don't
remember seeing before.

--
~ Adrian Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk

== 2 of 4 ==
Date: Sun, Jan 2 2011 3:54 pm
From: "Phil Allison"

"Adrian Tuddenham"

>
> I have re-set the camera by removing both power and memory batteriea,

** The camera has no memory battery.

> Any other suggestions?

** Try resetting the camera to all defaults.

See P28 of the "Advanced Use Guide".

.... Phil

== 3 of 4 ==
Date: Sun, Jan 2 2011 4:14 pm
From: "Phil Allison"

"Adrian Tuddenham"

>
> I have now noticed that the display has a slight flicker which I don't
> remember seeing before.

** The LCD display flickers when pre-viewing a scene lit by fluoro lamps or
other light source with mains frequency intensity variations.

.... Phil

== 4 of 4 ==
Date: Sun, Jan 2 2011 5:47 pm
From: who where

On Sun, 2 Jan 2011 22:33:02 +0000, adrian@poppyrecords.invalid.invalid
(Adrian Tuddenham) wrote:

>John Keiser <john.keiser2@hawaiiantel.net> wrote:
>
>> Is this in all modes - Auto, Program, etc?
>
>It seems to be.
>
>Even using it with the manual exposure at its darkest setting gives
>over-exposure and a coarse 'raster' effect.

Possibly the sudden freeing up of the mode switch is the clue. It may
be "detached" and stuck in an inappropriate mode.

Basically with the cost of these device dropping continuously you will
find - as we have - that repair is not a cost-effective alternative to
replacement. That said, you have littlle to lose by disassembling it
(not trivial) and exploring the internals with special attention to
the mode switch.

>I have now noticed that the display has a slight flicker which I don't
>remember seeing before.

==============================================================================
TOPIC: UPS battery life
http://groups.google.com/group/sci.electronics.repair/t/b73fd839ce17fb50?hl=en
==============================================================================

== 1 of 4 ==
Date: Sun, Jan 2 2011 2:43 pm
From: Jeffrey Angus

On 1/2/2011 3:50 PM, Jeff Liebermann wrote:

> I've used a Sawzall with a custom shaker attachment.
> <http://www.youtube.com/watch?v=4ZlJ05SJwpU>

There are betters uses of a sawzall.
http://www.youtube.com/watch?v=pPEBQ98VoEE

Jeff

== 2 of 4 ==
Date: Sun, Jan 2 2011 3:23 pm
From: "(PeteCresswell)"

Per nesesu:
>At work we had a very large UPS that used 600V of gel-cell 12V
>batteries each about the size of a largish car battery. In the 15
>years or so that it was in use, there were, perhaps, 5 power failures
>and the UPS failed every time even though all the routine maintenance
>and testing was observed. Other than the first time when it was only a
>month or so old and the inverter blew up [linerally] all the rest of
>the failures were due to battery failure.

This begs a question that's been bugging me for years: why
doesn't somebody make a UPS that hooks up to a 12-v non-vented
automobile battery?

Automobile batteries are available at many different
price/quality points, they're pretty much a universal standard,
the capacity is there in spades, public knowledge about
maintaining/replacing them is widespread, and push-comes-to-shove
in an extended outage, the battery in somebody's car can be
swapped in for a few more hours working time.

I guess there has tb a reason... but what?
--
PeteCresswell

== 3 of 4 ==
Date: Sun, Jan 2 2011 3:29 pm
From: Jeffrey Angus

On 1/2/2011 5:23 PM, (PeteCresswell) wrote:

> Automobile batteries are available at many different
> price/quality points, they're pretty much a universal standard,
> the capacity is there in spades, public knowledge about
> maintaining/replacing them is widespread, and push-comes-to-shove
> in an extended outage, the battery in somebody's car can be
> swapped in for a few more hours working time.
>
> I guess there has to be a reason... but what?

Short term vs long term capacity.

Automotive batteries really don't like being a long term
power source. You're actually better off getting a Marine
battery for that.

And you probably do NOT want "joe Consumer" dicking about
with a the current capacity (and capacity for impressive
flames and smoke) when he hooks it up wrong or drops a
wrench across the terminals.

Jeff

== 4 of 4 ==
Date: Sun, Jan 2 2011 5:41 pm
From: who where

On Sun, 02 Jan 2011 17:29:44 -0600, Jeffrey Angus
<jangus@suddenlink.net> wrote:

>On 1/2/2011 5:23 PM, (PeteCresswell) wrote:
>
>> Automobile batteries are available at many different
>> price/quality points, they're pretty much a universal standard,
>> the capacity is there in spades, public knowledge about
>> maintaining/replacing them is widespread, and push-comes-to-shove
>> in an extended outage, the battery in somebody's car can be
>> swapped in for a few more hours working time.
>>
>> I guess there has to be a reason... but what?
>
>Short term vs long term capacity.
>
>Automotive batteries really don't like being a long term
>power source. You're actually better off getting a Marine
>battery for that.

We had a distant radio-communications site that had grid power. It
needed battery backup as the grid certainly didn't provide the 100%
availability that we required of the radio systems. Because of the
distance and the cost of maintenance trips, it was visited annually
(unless a failure occurred).

After some analysis it was determined that the best backup battery
option was the standard "maintenance-free" auto battery, replaced each
year. More expensive batteries didn't stack up economically, and
these also were donated into auto use after retrieval, where they gave
additional service.

==============================================================================
TOPIC: I Don't Get It!
http://groups.google.com/group/sci.electronics.repair/t/a367b736ad25687d?hl=en
==============================================================================

== 1 of 1 ==
Date: Mon, Jan 3 2011 12:01 am
From: Ron

Okay, the new channel 32.2 has started broadcasting and I get it on
two of the converter boxes in the house, but on the DTV box in my
room, all I get is audio and a black screen which says "Audio
Service." I paid a good deal of money for the DTV converter, so I
expect it to do everything it's supposed to do. Does anyone know why I
can't get the proper picture, and what can be done to fix this?

Ron

==============================================================================
TOPIC: MESMARISING VIDEOS&HOT PHOTOS
http://groups.google.com/group/sci.electronics.repair/t/ff5fc5cceeefa201?hl=en
==============================================================================

== 1 of 1 ==
Date: Mon, Jan 3 2011 12:49 am
From: SAILAJA LOVES U

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