Electronics Forum / Repair / October 2006

A friend of mine is joining me at a benefit performance for a child
with a very serious medical condition in November.   At rehearsal he
told
me that his Polytone Minibrute is blowing fuses, and was using a little

I've got a CM11A computer interface which has a transistor that decided
it doesn't want to play any longer. The transistor is identified on the
board as Q2 and it looks like it might be a 2SD667 but I can't quite
make out the number for certain and not having a schematic doesn't ...

I am in search of a replacement Fresnel, & Lenticular screen for a 47"
widescreen Projection screen TV that were damaged.  Measurements of just the
screen, no frame are 41.75" x 23.75".  Anyone have any boneyard projection
screen tv's laying around.  Thanks

Can anyone out there offer guidance.
It appears my microphone has blown. A few years ago I did some first
year electronics and would ideally like to spend very little money
repairing my microphone.

Model nr is unreadable but someone told me it's a D110 chassis.
Old, must be about 12 years.
Set was dead but after replacing a few caps and lopt the green light comes
on but no picture, adjusting the lopt

I have a powersupply inside a Samsung LCD monitor that turns itself off
without fail after 20 minutes.
All the Switchmode DC rail voltages such as 12V, 5V and 3.3volts all
completely disappear.

The simple electronics on my old ProForm Air Stepper has failed.  The
electronics control a very small motor/drive gear which simply tightens a
belt on a flywheel.  Low power stuff.
There are 2 modes:  programmed and manual.  Programmed, which takes the user

Returning to USA/UK tool terms etc
What is the name in the USA for what we call
a Jubilee clip in the UK, presumably named in
Queen Victoria's jubilee year of 1897.?

I'm sure this question has been asked a thousand times but it's confusing
for someone like me, who is an electronics nut but not active in the repair
business.
Where in the heck is the best source for service manuals?

I've got a power supply for a cordless drill that's supposed to output
22V 450mA but only gves 2V.  I've checked the (4) diodes and they're
OK.  There's a capacitor in there that I haven't checked.
What might be the most likely cause?

My cable provider (Cox) wants $10/month to rent a digital cable box.  Can I
purchase one outright to use, rather than rent one?

Does anyone have a schematic for this set, chassis 27214-00 ? The
switching power supply is fried, someones kid spilled Koolaid or something
inside it, and I'm thinking of attempting a last-ditch repair effort. I plan
to sub the power supply with that from a completely different ...

Has anybody ever run into a problem with this unit, whereby the 19kHz pilot
level is intermittent? It doesn't seem to be a thermal problem, and I have
cleaned the switches and controls. I don't know if the phase adjustment pot
on the main board might have a problem.

My PHB bought a DesignJet 2500CP on ebay a couple of years ago,
and an hour of searching HP's website and calling 800 numbers
resulted in pretty much nothing.
What's happening is, when we go to power up the plotter, it

Hiya, my zanussi zz bs 772 electric built in-oven takes ages to heat u
on the fast heat up and it was heating up to 140 then going down -
put in a new thermometer, but I’m now thinking its a probe (a long tub
thats at the back) does this sound right? :