Electronics Forum / Repair / January 2005

We just got an air purifier that came with a 6.5", 6.5W
UV-C germicidal bulb, and we'd like to replace it with a
more powerful UV-C bulb (15W).  The socket and
starter seem pretty standard (mini bi-pin socket, FS5/

I would like to hear from anyone who has one of these.
Mine is several years old & works fine but I'd like to find
out about getting documentation, schematics, parts sources,
etc., from other than Ryobi.

I have a Viesonic PS790 monitor On the base of the mainboard in the
rear is a 4 pin plug like the audio plug used to connect CD-ROM audio
to motherboard. It is hidden behind a small breakout in the shell. I am
curious as to what it is.

I recently heard that alkalines batteries are much better than heavy
duty batteries.They say that they last longer.Is there truth to this? I
have tried to experiment with this and it does seem to be true.Just
wondering what you all have to say.

Can anyone help me to substitute the discontinued LM383 with another 5
pin T0-220 package amplifier?
The application is a small guitar amp. It's not my amp and I don't
exactly don't know why it's blown but I suspect too much thermal

Paypal verified payments please. Got 5 or 6 left.

Hi all, new here, just hoping for some info or insight into a problem, I was
given a large Sony TV, its quite old tho, probably about 8 yrs, but it still
kinda works.  the only problem is, that sometimes the screen just goes
black, although it still displays the channel number in ...

   Just throwing this idea out there for discussion. Okay I know there are
large LED screens available. Many used for sports events and advertising.
But what I wonder with the use of the same techniques used in say processor
production. Would it not be possible to make say a ...

help on intermitant loss of color

The problem just started but the unit will go into overload anytime the
volume is turned up when the unit is not hot. after going into overload
10+ times, the unit is hot then it is good to go. ( no overload)
I have read that solder joints are a problem but is there anything else i

      I am trying to repair an RCA 9" Color TV #E09344 (5/2002)
I need to find a replacement Horz Output Transistor # ST1803DHI
Where would be the best place to get one? Most places have a min order price
and I only need 1 part.

I'm in the process of repairing some minor problems on an older Marantz 2250
Stereo Receiver.  I am trying to get all of the illumination working and
have discovered that it uses a set of odd bulbs I'm not familiar with.  They
look exactly like an old glass tube fuse - 1 3/16" L X ...

Hi;
Thanks again for the help regarding the transmission. Your replies helped us
prevent the tranny guy from sucking about $1000 out of our pocket. Turned out
to be the 3-2 shift "assembly" whatever that exactly means.

I don't know if this is just the design, or if a repair is possible.
I recently received a Technics turntable, I think the model that made
them famous.  The cartridge and needle are in the clear lucite lid of
the turntable, and they move horizontally (no azimuth? issues) as the

I have never repaired an XBOX but I saw this in a local for sale
newsgroup and thought that if it may be a simple fix I can e-mail the
guy and fix it for him:
"I have a broken xbox that has never been opened or modded,Im not sure