Electronics Forum / Repair / December 2007

After I commented on a freezer post last week, my ancient Sears
Coldspot freezer has been acting up.  Before I unload everything so
that I can move it, and hopefully find a wiring diagram on the back, I
would like a generic wiring diagram so I can see what possible

I have a blown up Fosgate amp.  The faceplate has been ripped off &
the model isn't anywhere on it, the best I can tell from images is it
is a Punch 401s.  All four switching fets in the power supply circuit
are blown into oblivion.  The only marking on one of them I can make

have a problem when download a file off the internet it come up on the note
pad but it have all kind numbers ,letter that i cannot understand , it's
french to me would like to know what i'am doing wrong. Thanks in advance.

I have a 42" ESA Plasma TV, PDP4294LV1. The picture is fine, but the
audio cuts out. When you turn it on the audio is fine, but after 90
seconds or so the audio dies and then after 15 minutes t comes back on
again. If we watch it for long periods (Sunday afternoon football, it

    I am trying to build a "frequency upconverter" that allows me to input
a frequency in the range of 50 to 70 Mhz.   The output will be in the
UHF band.   Note: This will be a low level signal output.
   I found one semi-conductor, UPC8163TB, that meets the specs on the

I have a Crown D-75 amp that is missing a cap on the on-off switch.
Does anyone know where I can purchase one, or maybe something cheap I
can squeeze on there?
Also, one of the volume pots are scratchy.  I haven't tried cleaning

I am scratching my head over an old Tek 2445.
It might work for hours without problems, then it might do a few HV
discharges in the A9 high-voltage assembly and then it continue to
work. Or it doesn't and just continues with a rapid series of these

I've had this Viewsonic PF790 19" CRT monitor for quite a few years now and
it has been used daily since it was new without any issues. Recently I have
noticed that large white images will cause the horizontal size to shrink
about 1cm overall. I keep my desktop set to black so if ...

I am wondering if anyone in the group has experience with either of
these design program. I'd be interrested in sharing ideas.
yag1064

The other night I switched my tv input over to my Echostar DVR 5000 HD. The
Echostar had been switched on for months though I hadn't viewed it for a
while. The picture was very distorted. It was very blocky and totally
unwatchable.

I have a 14 y/o RC car that has a broken antenna on the remote. Is
there a way to fix that? The car won't work without it. The antenna is
like the ones that are on boomboxes. There was a small piece of metal
that kept it attached to the remote and the piece broke off.

Hey all,
I have a Samsung Syncmaster 175V LCD monitor with a dim picture.  It's
almost like the backlight is bad, but then when you use the on-screen
display, the menu is perfectly bright.

I have a 52" Hitachi rear projection HDTV. The red gun was too hot and
throwing off the colors of the display, so I opened up the bottom of
the cabinet to see if there was anything that could be adjusted/
cleaned up to try and correct the color. I found a series of knobs

My trusty Makita finally died.
BJ's had a Coleman battery-powered 21.6v with two batteries for
fifty bucks.  
Seemed reasonable, so I grabbed it.

Yes, just like magic, rub the magic lantern and say abracadabra, well it is
pantomime season
.
I could not read 3 of the 5 characters on a heat damaged TOP66 power