Electronics Forum / Repair / February 2006

I have an 8640b with issues.  As frequency is increased in each range,
it falls off to nothing or very low at the high end.  Low end seems to
work ok.  I aligned the two seperate detents on the range selector
switch, but still the same problem.  Is this a common failure, or am I

Can an old (>30 yrs) ballast end up by quickly burning out new
starters? (This is in a 12" 32W circline bathroom fixture.)
Would an old ballast have any telltale signs if it is malfunctioning?
Would it have that burnt smell itself? Thanks.

Anyone finding bad CRT sockets with green corrossion inside
the socket causing arcing? Seems common,even on rebuilt
boards from global in Mississsauga, Ontario. Also, CRT burn-in
at shutdown. SSI board causing this?

Does anyone know where I can download a service manual for this scanner
at? Thanks, Rob

I recently had the lenticular screen replaced on my Toshiba Theaterview
50" RPTV (I believe it is a model TZ50V61) due to a crack.  After the
replacement I notced that the screne is very shiny and when viewing the
TV from an angle the colors are very distorted.  This was not the ...

The other day, a photocopier engineer told me that laser printers that
use a closed cartridge system, use the same amount of toner each print
regardless of whether you are printing a single full stop, or a full
page of text.

Hey i have a JVC stereo, Model number UX-V10GN only a year old, for
some reason it stopped working. It does not produce sound, Everything
else on the unit work's perfectly, like it play's the CD no problem but
no sound is produced. Have checked the speakers and their cables they

The unit doesn't have power.  I found two diodes (in parallel) on the
power supply board seem got burnt (burn mark on the PCB).  Took the
diodes off the board, one is dead (zero resistance).  The other one
seems to work.  I replaced the dead one with a light emitting diode

I have a friend who has a 15 inch LCD monitor that is supposed to
connect with a VGA cable. Unfortunately, a prior owner of the LCD
monitor cut the cable off (Why would someone do such a thing?)
He told me that he took the monitor apart and disconnected the cable

I have a sony dat recorder dtc1000es that shows no life at all when
switched on but all the power supply voltages read ok.  There is
nothing on the display and the eject button does nothing.  In response
to a tip on the euras database i changed all the 10uF caps on the drum

   I have video tape recordings of B&W movies and shows like "I Love Lucy"
which I would like to transfer to DVD without the commercials.  Note: I am a
service tech.  I am working on an automatic method to pause the DVD recorder
during the color commercials.  Years ago, the color ...

I have not used this camera for about three years. My son wanted to use it
for school project. The play back works fine. When the camera is turned
on, the scrren as look in the view finder is dark. It almost look like
that the shutter did not open but it is open. Any ideas on what ...

The power supply was damaged from a power surge caused by lightning.
Does anyone have a circuit diagram for the VEPS 1008 vcr type power
supply module? If not is there any place I can send it to for repair?
Thanks.

OK, so I found that the dampers ARE sealed and are mounted to the
chassis by a press-fit onto a riveted post.
Does anyone have a service manual to any Sony CDX-??? Mobile CD Changer?
I'd appreciate a part number for the shock dampers so I can order a set