Electronics Forum / Repair / March 2005

My inlaws gave me their Mitsubishi projection screen tv when it quit
working. It will com on bu not stay on, then the standby light will
start blinking once per second. I need the schematics and or service
manual to run down the problem.

Thanks for the info. I removed the H.O.T and tested it and it is shorte
so I will need another one. Also, with the H.O.T removed I plugged i
the TV and it is still chirping at me. I don't know what the "yoke
"are and I do not have a chipper-checker. Please advise.

I have a Tektronixs 422 scope that I've had for years.  I'm getting ready to
put it up on eBay - but is has a "whine" when it's on.  The traces are fine,
everything works - but I want to be honest and not have any buyer trouble.
Is this normal in an older scope? What is it, can it ...

Has anyone used Plas-T-Pair?  Does anyone know what I could use in
place of the powder?  I have the liquid already.
I have a still-in-the-bubble-pack bottle of Plas-T-Pair by the Rawn
company that sounds like it would be very helpful to me now in fixing

Hello
I am not sure if there is a more specific forum for TV related
problems so please let me know if this is the case
I have a Sony Trinitron kv-m2511u/5 which is 25" monitor.   Picture is

I bought a Panasonic HDTV monitor (27") recently. I noticed a problem
with the lower left corner of the TV where it shows a purple tinge and
any scrolling text seems to go up when it reaches there (like as if
there was a bump).

Looking for a replacement Line Output Transformer for my rather elderly
Oscilloscope. Have tried a few places in the UK but I fear old age may be
getting the better of it.
Has any one any ideas of a possible source of one as I am very loathe to

I have 60" rear projection that is having a picture problem.  The picture is
a little too wide and slightly bowed at the bottom but it is ok in the
middle.  I'm thinking that the problem is with the deflection ic because it
controls the geometry of the picture.  Any help would be ...

My graphics card has an S-Video output that can be sent to a TV using a
scart adaptor.
Problem is, for some reason the output signal is in the ntsc format, and
living outside america, my TV uses the more common PAL D format.

I repaired a guitat tuner today - blown 78L05 as
no supply reversal protection.
I was intrigued by another 3 pin TO92 device marked
8054

My RCA TV CTC 197CE2 was clicking three times and than shutting off
I read on another thread to change the flyback transformer. I did thi
and now when I plug in the TV it sounds like it is chirping at me an
it will not turn on. Does anyone know what I should replace next? An

looking for the service manual for the sony k32v26.  Seems like I have
no power, not even enough to go into standby, so its possibly the
power suplly side of things.  If anyone can give me tips on manusla or
schematics i would appreciated it.

onkyo tx-sr601 produced loud thump while viewing dvd Lion King and sent
dvd to the dvd's screen saver...powered down all...disconnected
electricity to all...powered back on...dvd player plays...all
components play...except

Traces comes on full bright and intensity control has little affect
Manual indicates ther should be .4V on pin 3 of U1 but I get -.61V
Pin 7 reads -.176V which baffles me as the schematic shows 3 and
shorted together. My thinking is that U1 is bad

Does anyone recognise this as a fault .. and/or have a fix
Sony CCD-F385E video 8 camera .. (i.e. quite old)
now only displays in monochrome ...
Thanks