Electronics Forum / Repair / November 2006

I have a mission ms10 subwoofer.
It died a few months ago and since the local engineer looked at it, i
seems that I need a new component for it called a "s53 ami" powe
amplifier module.

A friend asked me to look at his laptop (I have 15+ experience in
assembling computers and home made repairs - but mostly desktops).
The laptop died during a night, it was ok in the evening and completely
dead the next morning. It's 15 months old HP Pavilion.

I have an old GE range.  Model # J BP26 0w2A.  It came with the hous
when I bought it 16 years ago.  Last year I replaced the bottom heatin
element.  This saturday I replaced the broiler element.  After that th
oven doesn't heat at all.  I suspect it is the temperature control.

I have a few old transformers that output 12volts at 300milliamps.
I was wondering if it was all that important to use resistors to get
the current within the stated specs for a pc case fan I wanted to try
to run on it.

I'm doing scheduled maintenance on a number of PA system amplifiers
located in a night club.
Normally these machines get a clean with compressed air and optional
paintbrush for stubborn fur balls.

Hallo NG,
ich stehe gerade etwas unter Schock, da mein Notebook (ACER TravelMate
291 LMi) gerade den Dienst quittiert hat:
Wenn ich die Start-Taste drücke, dann leuchten die Status-LEDs kurz

what kind of 6 pin memory chip can work  with only 2 pins ? (no power
pins used) does it exist ? how can it be read or write to?

My son just replaced the LCD in his sony laptop and now have a problem
that I don't quite understand. When I power up the laptop into windows,
I get a 1/2" hazy white border on all four edges of the monitor. Any
guesses what could cause this?

I need help ID'ing 3 parts on the power supply PCB:
D808
R828
Q824

I am trying to troubleshoot an HP 7140 LCD.  The LCD backlights, but
remains completely black.  I am able to access the machine using an
external monitor.  I have cracked it open and am ready to replace some
parts.  I don't want to spend time and money throwing parts at this

r6 in the power supply,a samsung BN44-00053c is burnt open.
its either 6.8 or 680 by what remains of the multiplier band

An older friend asked me to hook up their DVD player to their HDTV via the
component cables. Yes, not complex but again, they're older and somewhat
technophobic.
I got the DVD hooked up to HD1 and in fact it plays the DVD when HD1 is

I have a Pansonic stereo system with separate high and low speaker
terminals.  There is only one stereo power amp ... thus it is not a true
bi-phase arrangement.  I can't find the answer to how the hybrids work, so I
am posting my guess here.

Say for 12, 15 or 18 inch ones - does anyone produce just the cone with
cylindrical back extension with coil for known or standard makes. ?
Where the original has burnt threw the cylindrical former due to DC fault so
could not try rewinding on the original. Seems a shame to chuck ...

Should I be concerned?  What is this fan's job?  Is it to keep the oven
ventilated of food vapors or to cool the magnetron?  If the latter then I
need to replace it asap.
Thanks,