Electronics Forum / Repair / November 2004

DLP (Digital Light Processing) using the TI MMD (Multiple Mirror Device)
has the potential to produce very accurate color rendition.  And indeed
DLP is one of the major players in digital cinema.  Thus, we were
surprised to see what might be described as "muddy" yellow and red on

hey, just got a second hand hp p1100 monitor, works gret, but
sometimes the top of the screen shakes/wobbles for a quick second,
sometime it happens after a few seconds, sometimes after a few mnutes
and sometimes not at all, any idea what this could be?

I have a View Sonic VE170m with the back light flashing on for just a second
when first turned on.
I have the monitor apart and wondered if there is a way to manually turn the
lamp power supply

Hi PRR15 and PRR17 1/8 watt resistors in power supply primary burned
beyond recognition. Anyone with a similar model can tell me their
values? Exact model no. is DVD-511/XAA though I presume any DVD-511 or
DVD-711 or maybe other models may have the same power supply

Yesterday I accidently get Tea over my keyboard. I opened it, cleaned
everything, but it won't work anymore. I suggest now it is not from
the tea, but from a rubber connection board. I don't know how's the
correct name of it, but like to describe it:

Hi! Im new here and I have a question.
On my iMac DV+ the screen starts to "pump" and shake, and after 5 to 10
minutes the screen makes a "blink" and the iMac freezes.
So far i found out (with the help of a service manual) thath the

when replacing ic's is it a good idea to fit a socket.

Where is the best place to purchase Sony VCR Parts ?

Hi All;
I was given a NEC MultiSync 77F 17" monitor. It's only 13 months old but the
previous owner turned it on one morning and it didn't work, but was working
perfectly normally the night before. It shows the green LED front panel

Does anyone have a service manual to the Fisher AD-850 CD player they
would be willing to sell?  This is an early model from 1983 that I'd
like to get going.  I need to repair an apparent control logic
problem.  The laser reads the disc fine, but it seems to get stuck

Can I use a LCR bridge in inductance mode to measure difference in
inductance if I suspect one of the windings in an electrical motors to have
shorted turns...?
What is the preferred way to check for shorted turns within an inductor...?

Hi;
Code said TCC or circuit. The original TCC solenoid was found with crumbling
electrical connections. Ran good for one night after it was replaced.
The only way it can know for sure if the TCC is bad or not engaging is to

I am trying to fix a Magnavox turntable(MCU061) made by Nippon Columbia Co.
The transformer was bad(open primary) so I subbed AC power to the board
through a variable AC supply. It will run at about 4v at the correct speed
but it's very unstable and the 33-45 sw does nothing. I ...

Can someone out there please send me a scan of at least the schematic from
TR-31?  This is for a Magnavox 2TR107M reel to reel tape recorder I am
trying to restore that belonged to my father.    Thank you.   Remove xyz in
email address to reply.

I recently built a robust lamp dimmer to drive an ignition coil.  The dimmer
circuit uses both a triac and diac along with a capacitor, resistor, and
variable resistor.  The dimmer feeds a 1 uF AC capacitor which in turn
drives the coil.  I have the coil in a mineral oil bath to ...