Electronics Forum / Repair / January 2005

I have a almost dead rasterops 2075 monitor. When you power it on there's a
high pitching buzzing/whining from the power supply section that gets softer
over the next minute - then its a steady soft but audible anoying buzz. I've
checked the output voltages from the power supply. ...

I have low hours IBM P260 monitor
Suddenly after an hour both focus trims (voltage) suddenly start walking (in
about 10 seconds) , I suspect the divider (part of the flyback)
Any help or low cost source for a flyback would be appreciated.

I'm looking for a certain type of reopenable cable tie:
http://sites.inka.de/klee/electronics/binder.gif
The tie in the above picture was included with a scanner (Travelscan
Pro) for "bundling" a USB cable.  For purposes such as this it is the

I have an old Pioneer SD-P5065 projection TV.  Using my laptop I ran a few
monitor tests, and all the tests/colors checked out except for the color
blue.  All other colors displayed fine.  The blue is barely visible.  On
normal CRT's I know I should try to adjust the screen pot on ...

We have had cable internet for about two years now because my son and
his girlfriend who've been living with us needed it for her Ebay
business. Prior to that we had dial up. We generally managed a 45K or
there abouts connection with it. It was sometimes slow but I never

Well I am an electrical engineer but an amateur repair engineer. A
friend of mine just gave me a sharp vcr VC AA-350, whom he previously
took to a repair center for it was a totally dead unit (power supply
problem). The technician changed a transistor in the power

Emerson EV406N  budget vcr, original problem was glue on a tape that really
gunked up the video head and some of the tape path & ac head
Now thats all cleaned, load a tape, it tries to pull the tape across the
head and play but halfway it screeches, finally struggles and gets the ...

Hi...
Curious if anyone can tell me if I might be doing
myself some harm...
Nicads in the cordless phone gave up.  New one was

I've got a Rasterops Monitor that is faulty. There is a component on the
power supply section that gets abnormally hot. Can somehelp help me identify
the component
On the components casing:

Many public libraries have a limited variety and quantity of consumer
electronics schematics and service manuals so I suggest those techs or
repair shops that are no longer in need of their service literature
that instead of throwing them in the garbage and pollute the

Hello-  The tuner on this TV is not working.. all I get is a blue
screen when I tune channels.  OSD is fine as well as both inputs. If I
go into auto programming, the TV searches for channels as normal but
non is found ! I checked my voltages. 33v and 5v are there. But since I

We just brought home an Emerson EWF2004 20" flat screen TV. It won't
recognize that it's being fed from an antenna rather than cable.
We've done the channel setup scan and it hits the VHF channels fine, but the
local UHF channels ended up strewn across the CATV channel numbers... ...

I am the owner of a Panasonic SC-HT 670 5-disc Home Theater system.  My 21
month old son decided to play with it one day and pulled some of the disc
trays out, not off, but out.  Now the system won't do a thing.  When it is
plugged into the wall and the power button is pressed, it ...

We have a 32" Sony Vega which is out of warranty.  Less than one week
after the warranty expired we had a problem with the "red
screen/blue-purple screen".  An authorized Sony repairman fixed the
problem.  Less than a year later, after being unplugged prior to the

thanks again,
I have a theoretical background in electronics (communication
engineering degree) but I have no experience in repair, so please bea
with me.