Electronics Forum / Repair / April 2008

   I repaired RCA TV model 14F512T with no vertical deflection problem.  R409
1ohm was open.  IC301 ("TDA4864AJ" on device)  is bad, but I couldn't get a
direct replacement (not available).  A "substitute", part number 264870
(STV9302A) was sent, is NOT A DIRECT REPLACEMENT.  After ...

I need a schmatic to assist in finding an elusive intermittent.
                                         Thank you,
                                                          Dale

I posted this a while back and am still needing help so here it is
again. PLEASE E mail me directly hlbucklin@verizon.net
My electronics tech is having trouble fixing an SAE Two amplifier
model A-14. It has no audio output. If he shorts across a relay the

I'm gradually getting rid of most of my TV parts stock, the business
is now all but dead and I have little if any use for most of my parts.
This spring I'm turning my attention to my CRT stock; I'm anxious to
get rid of them while I can still do so for free. My stock covers

Checking the coding function of the r/c, not something I do very often.
Manufacturer's original for controlling amp,tuner and CD but with 3
different receivers, one for each separate, from one IR controller.
The ident "pulse" code for all button presses, was always 101 then one bit

Dear Menders
I have a Gould DSO 400 storage Osciloscope
Old (1986) but a good tool, the psu has gone down and I desperatly nee
to get a schematic for it or a 420/ 450 or other simular Gould scope

Does anyone have experience in repairing Blu-Ray disc players?
Would you say that they are, in general, more difficult to repair than
ordinary DVD players?
Are they more prone to tracking problems due to the finer data

I have just fixed our Apex DVD player that had the No Disk error and
wanted to share the solution as it's generic.
It was at the point of not recognizing any kind of disk that we put
in. Checked all the obvious standard stuff.  Did some searching and

This is something circa 1982. Consisted of a largish, for hand held,
camera and a matching VHS recording pack carried on a shoulder strap. It
ran off a NiCd battery pack. Also came with a mains power station that
could recharge the NiCd pack and distribute the wideo signal

On many occasions, I have said on here that DVD players rarely suffer from
dusty lenses, for the reasons I have also stated. This morning, I had a
Sammy HT-Q20 home cinema rig on the bench that was really struggling to
play. The fan vent on the back panel was full of dust. When I ...

Does anyone recall those power saving "discs" for light bulbs they were
selling back during the oil embargo days of the 70's.  The disc was placed
in a standard light bulb fixture and the light bulb was screwed in next.
The disc was nothing more than a diode that "saved energy" ...

I own a Mr. Coffee TFTX85 and after cleaning it up the machine does
not want to work.  When I depress the on button it does not seem to
catch and when the light indicates on it goes off in about 5 seconds,
if anyone has a suggestion please advise, the machine is a favorite

I have a high voltage power supply (Swan 117cx) that may be the cause
of high distortion in the radio it supplies power to.  How would I
test for excessive ripple, etc?  The voltages are correct.  
** Posted from http://www.teranews.com **

50V , low wattage lamp (or seriesed lower V ones) (assuming normal testing
is 10 to 20W range) to visually show if the volume is set too high, also if
high level high f oscillation on the output; sacrificial, fusewise, if
overdriven.

Have you ever had to repair a cable and you know the wire is probably broken
at one of the plugs but you cant tell which end?
If you have a multimeter that measures capacitance you can really shorten
your work. Measure capacitance of the bad wire to adjacent wires. If its