Digest for sci.electronics.repair@googlegroups.com - 8 updates in 4 topics

etpm@whidbey.com: Aug 26 09:36AM -0700

I have an old Canon camera, model SD300, that I modified for taking
pictures in near IR and near UV. The largest capacity SD card it will
take is a 2GB.
I bought 2 cards and took a lot of pictures and they were all fine
when I looked at them later when I put the SD cards in my computer and
tablet. The cards have sat around for about a year and now most of the
pictures are corrupted. Fortunately I had saved the pictures I liked.
Is there something I could have done that caused this problem? I am
using micro SD cards in an adapter so they will fit the camera and my
tablets. Should I just use full size cards and only view the pictures
on my computer?
Thanks,
Eric

 
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micky <NONONOmisc07@bigfoot.com>: Aug 26 02:32AM -0400

In alt.home.repair, on Tue, 25 Aug 2020 11:20:58 -0500, Mark Lloyd
>> more than 2 years. More than 5 years?
 
>We had to rescan earlier this year, just because of a new subchannel
>(56-4, AntennaTV) that the local NBC station added.
 
So does that mean if you hadn't rescanned, you'd still have gotten all
the channels but that one.
 
Could you have just punched in 56,4 and the tv would find it, and then
ou could add it to the internal list, but they said to rescan because
that's a simple instruction and applies to everyone, whereas the
instructions for adding a station vary by tv.
 
Mark Lloyd <not@mail.invalid>: Aug 26 11:34AM -0500

On 8/26/20 1:32 AM, micky wrote:
 
[snip]
 
>> (56-4, AntennaTV) that the local NBC station added.
 
> So does that mean if you hadn't rescanned, you'd still have gotten all
> the channels but that one.
 
Yes, it was just that one that needed to be added.
 
> ou could add it to the internal list, but they said to rescan because
> that's a simple instruction and applies to everyone, whereas the
> instructions for adding a station vary by tv.
 
I can't try 56.4 now, since its already scanned (checking it would
require disconnecting the antenna, rescanning, then reconnecting the
antenna. Too much to do for something that probably won't worh and won't
help if it does). Trying 22.4 (the physical channel is 22) is ignored
(on all t TVs I tried).
 
 
--
Mark Lloyd
http://notstupid.us/
 
"Religion is all bunk." -- Thomas Edison
legg <legg@nospam.magma.ca>: Aug 25 06:07PM -0400

On Mon, 24 Aug 2020 10:33:38 -0700 (PDT), "ohg...@gmail.com"
 
>T901 sub transformer is open (lightning). I subbed in a 12V control transformer and it works as it should, but it's too big to mount in the confined area. The original transformer is a through the hole PC mount.
>Yamaha part number is XA754001 obsolete as of 2008. Anyone have one to sell, or do they know of a close enough sub to fit the board for this model. I don't mind relocating foils or redrilling if I have to but customer prefers to keep it authentic if at all possible. Thanks.
 
What's the size and pin spacing/function?
 
RL
"jfeng@my-deja.com" <jfeng@my-deja.com>: Aug 25 03:56PM -0700

How abut a wall wart?
Tim Schwartz <tim@bristolnj.com>: Aug 25 08:33PM -0400

> T901 sub transformer is open (lightning). I subbed in a 12V control transformer and it works as it should, but it's too big to mount in the confined area. The original transformer is a through the hole PC mount.
> Yamaha part number is XA754001 obsolete as of 2008. Anyone have one to sell, or do they know of a close enough sub to fit the board for this model. I don't mind relocating foils or redrilling if I have to but customer prefers to keep it authentic if at all possible. Thanks.
 
A lot of surround receivers have a 12V standby supply derived from a
small transformer on the board. If you look at the size of the one you
need, you might find something very close in an old surround receiver.
NAD, Arcam certainly used them, and I'm sure others as well.
 
You might also want to look at all of the pins on the old one, as you
might have an open thermal fuse. On some transformers it might be
possible to replace it. Sometimes it will take unwrapping the
transformer tape to find it. I would NOT suggest bypassing a thermal
fuse as a long term solution.
 
Regards,
Tim
"ohg...@gmail.com" <ohger1s@gmail.com>: Aug 26 08:07AM -0700

On Tuesday, August 25, 2020 at 8:33:59 PM UTC-4, Tim Schwartz wrote:
> fuse as a long term solution.
 
> Regards,
> Tim
 
 
Thanks for the advice fellas. For posterity, here's a solution by substitution, although the sub may be just as hard to find in the near future. By wasting far too much time, I discovered that the Sony 1-448-852-11 transformer is the same as the Yamaha XA754001. Same size, footprint, and even the same plastic foot snaps. Perfect fit with no mods required. All is well.
 
John
legg <legg@nospam.magma.ca>: Aug 25 04:30PM -0400

On Mon, 03 Aug 2020 11:03:34 -0400, legg <legg@nospam.magma.ca> wrote:
 
<snip>
>the OS on a USB-connected HDD.
 
>I'm discouraged by this experience with DVD media and
>hardware, for data.
 
Final replacement for the drive on IDE interface solved
the last of the issues, on the older machine. This drive
had been replaced with a similar 'new' HT/LG model once
already, without results. The new Sony part is datecoded
2008, 'new in box', though it's obviously been rifled and
reboxed some time ago.
 
The Sony DRU-190A had no issues, though it had me worried
when explorer didn't seem to see a blank DVD. Installed
software did see them and interrogated/tested.
Labelled data DVDs were properly listed in explorer.
Perhaps the older OS didn't normally list blank media - my
memory fails me.
 
I'm staring ar 6 duff optical drives on the shelf - all
HT/LG of the same vintage. 2008-2010. Half SATA, half IDE.
 
RL
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