Electronics Forum / Repair / July 2004

My Weller w100 is dead. I opened it and everything looks "ok". My
meter was dead so I couldn't check the cord. Any other suggestions?
TIA GT

I have a medical grade isolation transformer.  I'd like to find out if it
is approriate to use it to improve safety when working inside a mains
connected electrical device (not a TV/monitor but something with an open
power supply).  If so, how should it be configured?  I noted it ...

I have a couple of questions regarding VCRs.  Is it possible to have a VCR that
does NOT have a an idler?  Also, is it possible for a VCR to eat tapes because
the motor needs to be replaced?  The reason I'm wondering is because I recently
had to drop my Sylvania SSC719C TV/DVD/VCR ...

Couldn't find a better news group for repair of power tools, so...
Bosch 1632VS reciprocating saw. Bronze bushings in the recip. mechanism (up
front) are pressed into the aluminum casting. When saw gets warm, bushings
are free to slide with the shaft, which results in the wearing ...

I've had a 350W power supply running a P4-2.5GHz/512MB/80GB/GF4ti system
for quite some time now (probably over 1,000 hours on-time).  I was using
it the other day, when out of nowhere I hear this loud 'click' and the
system is powered down.  Opening up the power supply reveiled ...

My good old workhorse 2335 scope just quit the last days: fault is on
the A15 boord (HV): All diodes and transistor are ok checked by curve
tracer.
So it looks I won't get forward without a schematic. Is there any

I would like to know where I can get a use power supply for a infocus
570 or schematics for the power supply.

I got a 2235 scope off of eBay.  It was supposed to be in mint
condition, but when it arrived it had a trace problem.  The trace gets
dimmer as it sweeps from left to right.  The focus adjustment in one
direction seems normal, but in the other direction it makes the right

I'm having to check several circuits with many capacitors in them.
I have heard of using the following tools:
1. capacitor testor - for out of circuit tests (measure leakage &
capacitance)

My monitor has caput'd and there is a clicking noise coming from the
motherboard.  Anyone know what this could be?
chris
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Remote is a universal RCA a few years old.  First few months I owned
it - fine.  Then, intermittently, it would stop operating the TV set.
I even had it programmed to operate a 2001 model Philips VCR we bought
new back then.  That quit responding to this rc completely after about

I have some old TV, and it works fine. Only recently I discovered that
voltage between shield of composite input and gnd of device being
connected is about 130 Volts DC!!!!! Its about 80V when voltmeter is
set to AC.

I've googled a little around but I'm still confused...
I got a heavy used logicanalyzer with color CRT & touchscreen. But
unfortunately the screen is very dim. Even with cloudy daylight I have
to darken the room :-(

Hello Group:
Have a Mits. model VS60VX2 in shop with some burnt and blown up
resistors and need help to ID them please.
The resistors are in circuit with Q4A03 and Q4A04, associated with

Power supply on my SV-5000W beaks down when I leave it on for long
time. It happend already two times.(Approximately every 2 years). Does
any one have schematics or knows what part needs to be replaced? VCR
is essentially dead no lights and strong smell of something burnt