Electronics Forum / Repair / February 2006

In trying to test the laser power supplies I mentioned in an earlier
post, I dug out my HV meter...it's a Heathkit, inherited from my great
grandpa.  It didn't appear to be funcioning, so I disassembled it...In
the probe end, I found 2 large resistors, constructed of some material

Please see above post
--
M.Joshi

hi!anyone have or know a site were i can get info of repairs for arcade
machines? not just video arcades mechanical too?

I dont have the model #s but these are last years silver cased combos
and the TV combos too .. all Panasonic .
I`m sure by now some of you have seen these with a bad Lazer
block/pickup . You get a message on the tv .. Please check the disk for

I have a 32 inch Toshiba model CF32G50. The coax connector has worked it's
way loose inside the jack hole. I took some pictures of the area, and here
is the hole where the connector was originally connected into:
http://www.geocities.com/dannykewl3/CoaxConnectionAreaBare.jpg

Let me recommend you a nice software program that I've tested recently.
Video DVD Duplicator creates the full copy of DVD discs, copies DVD
movies to DVD (DVD+R/DVD-R/DVD-RW) or CD (CD-R/CD-RW), converts DVD to
DivX, DVD to VCD. Fast. easy and reliable, it can be a nice

I am experimenting repairing a dead thinkpad x20. The machines power light
flicks momentarily when the dc jack is inserted or removed.
I accidentally shorted a couple of pins on this IC, and now the behaviour is
much different, with lights doing funny things.

I am trying to design a Emitter Follower. I am trying to give the load
resistance as 50 Ohm.
Could some one tell me how to calculate the Biasing resistance on the
Base circuit of the transistor.I am assuming that the Short circuit

I have opened an ordinary battery to get the carbon rod and the black
powdery stuff around it stained my drawer. I had some nicads in there
and I was wondering if the nicads would be affected?
Some of the batteries did have some white stuff on the positive

got a Tek 2215a to repair. At start, caps on +5V was dead, making a
direct link between +5 and ground.
now I can see lines or signals on crt but wit maximum intensity, which
is not good.

There's a simple component that frequently gets flaky on
a certain kind of synthesizer I use. The component is
called a "data encoder." Its something attached to a knob
that you turn to scroll through lists. It looks like a

I have a 2002 RCA P46924, chassis CTC195M26A.  Last fall it stopped
working and I had to replace the flybact and the HOT.  I finally got
around to doing it and now it looks great but it intermitently turns
off (both audio and video) and on within 1-2 seconds.  Sometimes it

Picture went out on TV that we LOVE  it is 17 years old but alway been
excellent.
We have sound but just blank screen.  Was like poof its gone...  Help
looking for ideas of what  to do we think picture tube.  Hard to fix??

I have an Analab 2.0 Z80 Trainer. It looks like a very capable single
board computer. Unfortunately it is missing the PROM with the monitor
code. An internet search yields zero info on this unit. I have two
manuals but neither one contains the monitor listing. Does anyone have

I have an old EIZO 14'' FLEXSCAN 9060S monitor and I need it to b
working at least for a month. At first it worked fine although wa
second hand already. But then it started switching itself off after 1
minutes or so. I decided that I have nothing to lose and starte