Electronics Forum / Repair / June 2008

I have a GE 9" under the counter TV (Model 09GP108) which has video that
fades out after the set is on for while, then comes back, and repeats the
process periodically thereafter.  There is a NPN transistor labeled TP15
which appears to get hot enough to discolor the board ...

This Saturday I replaced seven popped Nichicon electrolytics
in my iMac G5; it took me nearly five hours of intense battling
with too-tight hole sizes and high-thermal conductivity planes
but the job got done and the fix worked.  Has anyone worked

Triple footswitch , no name , no ratings on switches, GFX 65, 1999.
Impossible to use as a mind of its own which channel it wanted to be in.
On resistance anywhere between 200 ohm and 100K on each of them.
At least easy enough to get inside them, dissolve away the grease and deburr

Dear group,
I'm posting here because I'm hoping you guys of anyone can solve my
problem.  My component supplier can't, Nokia can't (or won't) and
without it, I'm missing the functionality of my phone.

Does anyone know how to get into the service menu of a Hitachi CP-X430W? It has
a faint double image, apparently in the red channel, and the optical alignment
is correct. The cyan leading ghost image shows up on all screens including OSD
menus. I've seen similar but correctable ...

I need to figure out which smd class this ic chip is.
If you take a look at this pic http://members.aol.com/ta7205/MVC-181f
The 8 pin chip with the red dot is the one I need to replace.
I have an  SOIC 8 version sitting just to the left of the chip.

My HDTV has one HDMI input. I would like to bring something
out front so I can switch between our XBox 360 and DVD recorder
without unplugging either.

I have an T43 Thinkpad whose LCD had been slowing dying (took on
pinkish hue until eventually the screen went dim)--I had diagnose
this as a problem with either the backlight or the inverter.
So, I replaced the CCFL (yes, I realize replacing the inverter woul

A rheostat is in a simple series circuit with another component. The
input is connected to one end of the rheostat.  The output is taken
from the wiper terminal.  Some schematics show the remaining other end
of the rheostat left unconnected and others show the wiper and

I realize this is the electronics.repair group and not a computer group, but
my question is really about wire.
Long story short:   I've had 1.5 Mbps DSL for years.  I found I could
upgrade to 6.0 Mbps service and did.  Earthlink sent me a new modem.  New

Twice in 2 weeks, faults caused just by normal handling of kit, ie gripping
at the edge to pick up the kit and pushing in some vital control component.
Only an inch or so in from an edge so precisely where a thumb could go on
picking up relatively heavy kit.

Hi, i have to buy a oscilloscope for testing Mobile Phones, Dvd/Dvx player,
Power supply and monitor lcd, i have to choose from this model: Fluke PM
3082 and HP 54600B. PLease wath is the best choose for me? Thank you.

What are the benefits of using a permanent magnet for a coil core.
I recently came across a design for a switching power supply that used
magnets as cores for the inductor. I have never heard of such a thing,
except maybe in speakers.

We bought a Creative ZEN V mp3 player. It comes with a USB-cable to
charge the li-ion battery through a pc. I want to charge this player
with a power supply (220V in). I think the ZEN needs 5 V at 2.4A (max)
it says at the internet. I do have already a power supply witch says:

Believe it or not, about 30 years ago I worked in a car stereo
installation shop as well as a CB radio installer.  Back then, we had
to manually connect each wire.
Times sure have changed, but I'm not sure if this is for the good.