Electronics Forum / Repair / July 2008

I have two Panasonic VCR's, model numbers PV-V4540 and PV-9450.
They are almost idenical on the outside and very simular on the
inside.
The "newer" model - PV-V4540 - seems to have a head going bad from

This is an Insignia Model: IS-HTIB102732 progressive scan home theatre DVD
receiver.  It was accidentally plugged it into a 220 volt source and
"clouds" of white smoke apparently started coming out of the left hand side
where the power supply is,  even though the person who did ...

The vertical deflection went out on my TV a few days ago.  It started
acting funny a few days prior to it going out altogether.  I'd turn the
set on and the thin horizontal line would appear, then fully deflect,
and oscillate back a forth a few times, sometimes staying a line for ...

Any suggest a circuit for a homebrew nand chip programmer ?
thanks,

I am looking for a firmware module for my Laserjet 3200.
In USA and Canada, HP send it for free (cause the original was defective
on all the printers), but not here in Europe.
If you have one, please, send an e-mail to:

Here's one I've never had before. Earlier this week, my wife informed me
that a business-related CD ROM that she uses regularly on my machine, was
failing to read. She was right. Further investigation revealed that the
machine, a Dell, could no longer see my 250GB data drive either. ...

I need a "Silicon Power Cube" which I believe is just a couple of SCR's,
potted, on a heat sink.  Looks like this:
http://i4.photobucket.com/albums/y129/filmteknik/misc/cube1.jpg
http://i4.photobucket.com/albums/y129/filmteknik/misc/cube2.jpg

I need to build a surge suppressor to go on the input of an alarm
circuit. The circuit operating voltage is 24 volts DC. This is a two
wire input with an end of line resistor. I pulled a toroid input
filter off an old RCA TV chassis and plan to connect my circuit

For twenty odd years, I have had the same Terry's Anglepoise bench lamp in
service. I have always used perfectly normal 60 watt incandescent lamps in
it, without any problem at all. Although the metal shade used to get quite
warm, it was never enough to actually burn you when ...

How do I get rid of ,, antivirius2009.   can,t get yo my hot mail or
yahoo mail. this web page come up everytime. Thanks Calvin

I've been asked to look at a Nashuatec 3413S photocopier with a "code
55" error. My research suggests that this is probably caused by a
failed exposure (fusing) lamp.
http://translate.google.com/translate?hl=en&sl=ru&u=http://www.tact.ru/cgi-bin/i
konboard/printpage ...

Hi,
I´d like to put the sound-generator and amplifier of an Roland HP1700 into
an old HP1600 piano (keyboard is better).
Unfortunately the keyboard connectors are different. Does somebody know the

Nowadays i m facing a new problem. My PC's monitor blinks(it goe blank
and after a second the screen revives), this heppens atleast 3-4 times
an hour.
Can anyone help me out of this problem??

I need a replacement type or a datasheet for an Ixys IXFH1555 maybe
n-channel 500V 15-20A mosfet. It worked in a wig welding inverter.
Thanks Malte

I resently got my turntabl out of storage from a move and tested it
out all 3 speeds are stuck on 78 what needs fixing or is a new part
that is needed?