Electronics Forum / Repair / April 2006

I have a 7 year old 32" Sony Trinitron TV that just took a dump. The TV
itself turns on, but the tube is obviously not getting power. There's
no image whatsoever, and there's no trademark "buzz" when first
powering it on.

I have asked this question before but maybe someone has some insights
into the following this time around.
How do you troubleshoot complex CPU boards like late model Midway,
Sega, Namco arcade pcb's that have many custom chips with no data

I have a LCD monitor that is wavy and produces more ripple as the
resolution goes up.
I have just replaced 2 surface mount capacitors, their ESR ( using Dick
Smith meter) readings are 88 and 97 respectively, so there must be bad

Got rid of 20 year old set the other day and got a new Insignia
IS-TV040919  $89 at best buy. Old set had a 2 year old Allegro ABV441
DVD/ VCR combo  hooked up with quite a few adapters to make it work
with the 20 year old tv but work it did both VCR and DVD played just

is there no free schematic repository on the net?
i can find almost any guitar amp or arcade machine out there somewhere but
commn things like TV's must be purchased.
i would think that TV co would give away their schematics. personally if a

Way back in the 1950's, Waterman came out with a scope, mil version was
the AN/USM-24C.  A mediocre scope- AC coupled only, 5MHz bandwidth,
poor triggering, but it did have one really neat feature-- selectable
100/10/1/.5/.2 microsecond intensity markers.  They made risetime

I have a Zenith 32" Model# A32B41W TV that fried from higher inpu
voltage; someone miswired a receptical and instead of 120 volts the T
received 240V!!! Lots of smoke filled the living room when the powe
was restored.

While trying to register Siemens 242 handset to 2415, I de-registered
the original handset following someone's advice. It turned out 242
cannot work with 2415 model at all.
However when I tried later to register the 2415 handset with the base

Hi all. I run a professional amplifier service shop. I've seen most
different topologies used for high power audio amplification. But, this
Peavey amp really confuses me. It's a Peavey PV-1.3k massive 4U high
stereo power amp. It came into my shop with one channel badly blown,

I have an old stereo system from the 70s that has an 8track,
record player and tuner + aux
Anyhow, it has AM, FM mono and MPX
But on MPX it plays mono only...  I am unsure what to look for.

i have this Z27A11S zenith tv. It will not turn on. i opened it and changed
a few caps that appeared good to me.
put the board back in and it turned on. great! ah, no. once i put the board
in and buttoned up the back of the set it would not turn on again.

This Grundig TV set shows the red LED when powered on through its
mainswitch. At a 1Hz rate one can tell that the supply is trying to do
something. Commanding the set thru the REMCO does not work either.
I removed its chassis and tried to diagnose the problem.

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Hi there i have had a sony handycam for about 2 years but have only
used it about 6 times in all,
and suddenly as i was using it on holiday the screen went all yellow
and fuzzy, is there any thing that i can do.

Hello again folks. Well, all suggestions made on the previous post were
tried and the end result is I'm back to square one! Just to remind you, this
36" RCA has what looks like distorted video, both RF and composite inputs
garner the same results. Image is shifted to the left ...