Electronics Forum / Repair / May 2005

I am working on a Magnavox 25TR12 C102 (Chassis 25P606-00AA). Originally had
a problem where the set wont power on, had low standby voltage. Replaced
C432 (known problem) and fixed cold solder on 2 res next to the cap. Now,
the set automatically powers on when plugged in. It ...

Monitor powers up into standby (amber LED).
When the PC is turned on the monitor switches out of standby (green LED)
but there is no display.
Any idea what to look for?

Just had my old Soundstream USA 364 installed in a new car (after
working just fine in my old one) and, within a few days, the left side
of the "channels 1-2" half went completely dead. The right side is just
fine, as is the "channels 3-4" section.

You know some breaks the "rules" by going whiter than whites (above
the standard max on the video color contents signals?
Well on dish and on certain DVD that has too bright images and extreme
flashes like "Blizzards" the opening before menu comes up is powerful

I have an Epson Photo Stylus 750 printer that I can't get to print black.
I've tried the Windex in the ink snout tube trick, I've tried multiple cartridges many, many clean cycles and no black. Some black printed with the Windex but no more.
Is it possible the head is shot? If so ...

I have recently acquired (for free) an older Mitsubishi VS-5071 Projection
TV (1993 model) that has been in storage for a few years, and barely used
before that. The color seems fine, however there is a noticeable amount of
distortion in parts of the picture. Whole rows of the ...

A while back, I posted about a high voltage failure problem on an NEC AS120
monitor.
The symptoms were as follows:
An audible snap, followed by the sound of high voltage bleeding off.

I'm working on a Philips 170B1 17" LCD monitor with a bad back light
inverter.  The inverter has 2 transformers (one for each tube).  One
of the transformers is arcing internally.  What are my chances of
finding either the transformer, or entire board for a reasonable

I have a 15 year old Sony KV-27EXR15 TV.  Been a super TV for me for
15 years.
For the past couple years, when I first power it up (cold), the video
flashes on and off about 5 times before it stabilizes and stays on.

Does anyone know what all I have to do to get this set going? Both oif the
4834 transistors were blown, the fuse resistor and three of those small
condensers also, the
HOTr chceks good Could I have Flyback trouble?

I want to devalop a car driving game using a steering wheel.I want to
know behavior of steeing wheel signals to vehicle wheel.How i can
decide the vehicle wheel angle and speed from the steering wheel
position and torque signals.

Our apartment (built early 60's) is woefully underpowered.  There's
one 20A circuit to service the entire living room, dining area AND
kitchen.  However the stove and oven have separate 220V circuits
and breakers.

This DTV307 60" unit is hell to transport and is located nearly 30
minutes drive from our shop out in country and is a big-time dog now.
Original compliant was botchy picture traced to a spotty CRT, changed
that.  Unfortunely had to change all other two CRTs to stop the

I seem to always be looking for data sheets and specs.
I found this site which may be helpful.
http://www.datasheetcatalog.com/
If anyone has anymore "Free" sites, please post.

Other than flexibility and ease of routing the wire--is there any
practical advantage for using multi-strand copper wire in a 12V DC
application over insulated solid copper wire? Application is supplying
power to a 12V 6 Amp water pump.