Electronics Forum / Repair / March 2005

I have a toshiba  satellite notebook (s204-2805) that has a mushy key
on the keyboard. (letter key).
It no longer responds unless forcably pushed, then works ok.
My question is can the key pad on the keyboard itself be cleaned

   I have a San Jose CD/MP3 car stereo that I would desperately like
to repair. The part in question is an LA4743B, manufactured by Sanyo.
The part is discontinued. It is a 45W, four channel(bridge) power
amplifier in a 25-pin single-row plastic package(w/integrated

Amplifier part still works great, after all those years tuner is
hardly receiving anything. Changed cable antenna connection, checked
to see if the internal antenna connection was ok, used the FM wire,
but it can't find anything automatically, only real bad reception of

Just wondering what the typical initial voltage is of a new aa or aaa
nicad battery before the first time you charge it. I just bought some
and the voltage ranges from .9 to .99 volts which seems too low to me, I
know it is very bad to let batteries full to this voltage normally ...

I have a 60" big screen tv,and the picture fluctuates when it is on.  Ihad
somebody come and look at it and they told me that it was a power problem,
probabaly the large signal panel.  Any comments, or ideas where i could
find a good price for one. thanks

I just got this 12 inch 1GHz G4 with a heavily broken screen which someone
had presumably discovered costs too much to fix at Apple and threw in my
direction, not particularly expensively
Is there anywhere I can buy the screen from some Samsung

press *65# as system pin code to access secret menu to reset factory
setting
hope these help!

First time posting here, not sure what the netiquette is.
I have a Sony  model KV-35V68. Has a 32 in. screen. The problem is that
the picture/screen cuts out.  sound is fine and when the picture/screen
is working it is is fine also. It does this in a flaky manner:

But probably something that you guys would know.
How do I get WIN2000 to retain mapped network drives after reboot without
error messages if the remote system is off?
I know you can answer "yes" and "don't show any other error messages" (or

I have a Sony protable SW receiver for which I would like to build a
power supply.  Trouble is determining the size of the plug needed.
Since I only have the jack portion (in the radio) it's a bit hard to
measure.  I see the jack is yellow, aren't these color coded?  If so,

Hi, my toshiba VCR started having 'muffled sound' problems
when recording (and to a lesser extent while playing back).
When I checked out the VCR I heard a piece rattling around !
I opened up the box and found that a small part had come loose,

The new parts are ok.
The question is this: if I connect an oscilloscope between PIN7 o
TDA8170 and ground, the vertical opens, also if (obvisiouly) I don'
see the image correctly.

My son has recently asked me to sort out his "Leappad" electronic
reading aid. Its a bit of kit which looks like a large green and blue
hard back book. You open it and place a printed paper book inside it.
As you open the pages it allows you to place a stylus on the printed

Hi.  I've got a tranformer that lost its barrel plug, and I'd like to
solder a new one on.  I'm fairly knowledgable about audio applications, but
mostly clueless about electronics.
This transformer has an input of 120V and and output of 9VAC, 1200 mA.  

Hello, R504 and R524 are burned beyond recognition in this set.  Can anyone help me out with component values?  Also, C432 (107/200) is about to blow its top.  Are there any other components I need to check?  Any help is greatly appreciated.
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