Electronics Forum / Repair / September 2007

I've got a problem. A friend of mine managed to plug in the power supply
of his external harddrive upside down, which damaged both, harddrive and
usb-interface. Now I'm trying to repair at least the harddisk, which has
short-circuit in the 5V-supply-line, caused by a defective ...

My VS-4504R Mitsubishi won't move the red bar down unto the white
horizontal to make a nice white.  The verical is okay.  Is there an
adjustment on the circuit board or does the gun have adjustments?
thanks

   I have a Magnavox TV model RJ5540 AK01,  chassis 27G1-01AA
(mfg 04/89) in my shop that won't turn on.   Note: I do not have SM
(Photofact 2676).   Customer said it was hard to turn on and the problem
got worse over time.  Now it won't turn on.  The reg. B+ goes to 34V

2 of the same fan blowing air in over the heatsink but there is a noise like
a variable direction wind or slightly gusty wind as though one fan has a
bearing problem.
It would seem one fan is fighting the other to some extent, significant ? or

I have this model and have noticed that on warm up,
the picture will have a series of ghost images off to
the right of the first image that subsequently fade
out after about the 5th generation...

No movements or laser light , totally dead CD player. Just -- in the
display.
Function sw and door latch sw ok. Plenty of 5V etc supplies around on the
chippery. Crystal and ceramic resonator have oscillation.

I have been trying to materialize my (maybe wicked) ideas. I am trying
to use a broken tv and a spare monitor (LCD) to watch television. This
means that I use the reception print of the TV only, to convert the
antenna signal and the monitor to watch these. It works (simply as an

I have a system that worked. Had a lamp and a ballast. It quit
working. I replaced lamp and ballast, check everything except the voltage
between the ends of the tube. The filiments light. My question, its a two lamp
ballast that has two unused wires. Having only one lamp connected, ...

The reverse-racist group calling itself the NAACP (the same ones who
gave an award to child molester Michael Jackson, because he's black
and they wanted to stick up for the 'brutha') have found a new darling
in violent thug Mychael Bell. Bell is the worst of the celebrated Jena

I have a Sony Beta - SL-HF750
It plays the tape, I can hear sound when connecting the VCR to the TV
using RCA cables - but there is no picture.  All I get is a snowy
picture and Scrambled Lines if I choose Super Beta.

Hello..
I hope this post is related to this group because I think this is
about electronic a little bit.
Hmm, my car battery is almost dead. But, when I jumpstart it, it

Hi, Y'all...
I got a good deal on this off eBay. The seller indicated problems, but they
seemed to involve only digital sound inputs. I mainly planned to use it for
analog sound, so I figured that would be no problem.

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Could someone tell me what kind of a component is TAG 8730
Thanks.

Hi...
I decided to check the idling current settings in a Denon AVR-3000. There is
a complicated process involving connecting a meter of test points,
adjusting intermediate voltage settings, then final settings of 3mv +/- .5mv