Electronics Forum / Repair / April 2007

Drawer jamming or not opening with a rubbing noise in the background.
Probably due to the toothed belt slipping on the motor pulley because the
spindle of the driven pulley or its "bearing" has worn and allows the 2cnd
pulley to tilt over. At the moment I intend packing out the gap, ...

Only used , not abused, domestically, ie not bumped around ina van at any
time.
Mechanically broken dome end of GT badged Sovtek 5881, neat circular crack.
Black deposit around a jet out of the envelope matching a black deposit on

All valve, no solid state devices, probably made 2002 from barcode date? and
2001 date on Sovtek 5AR4.
Powered on for about 5 seconds with cracks and bangs then HT light went out
and dead.

I require an LED display unit, part# NSM4202A for a job I am doing.
Unfortunately, all the suppliers of this, now obsolete, part want a minimum
order of around US$300.00 - US$500.00. This will push the value of the job
beyond reason. Can anyone suggest a supplier for this item? The ...

Anyone have a Toshiba projection set sitting around with a digital converter
board they can part with? I replaced all the 10 @ 16 surface mount caps on
this one, Fixed some of the problem but not all, This set was donated to the
Church if I can get it going,

I need to fix an igniter box, I suspect it might be the high voltage
rectifier, what modern equivelent could I use for the rectifier diodes?
The box is a rotax type NB 25/3, 24 volts in, 2kv out, 12 joules.
It's a simple circuit comprising of a trembler mechanism, induction coil,

i have a kenwood KR-V6010 IT STARTED OUT THAT YOU WOULD HAVE TO LET IT
WARM UP BEFORE IT WOULD WORK THEN IT JUST STOPED WORKING ALTOGEATHER
IT LIGHTS UP AND EVERY THING THERE IS  JUST NO SOUND ANY IDEAS?

VONSUR AV Systems offers Professional Audio/Video sales and custom
installs, at an affordable price.
We specialize in Harmony Universal Remote Control programming and
Upscale Custom Home Theater Installations.

I posted this a bit earlier in sci.electronics.design, but this list seems
to be more alive at this time of the day:
I need to convert a single ended signal to a differential one. Theres is
plenty of documentation on the other way ( differential to single ended )

I've recently been given a dual input 19" Dell Trinitron monitor that
needs repair. I'm wondering if this is a fixable problem and if you
fine folks can advise me on how to fix it myself. I have generally
good electronic repair skills but have never tackled a monitor before.

Over 3000  STATIONS on your PC or Laptop for free!!
Instantly Turn your Computer into a Super TV
Now you can watch hundreds of LIVE worldwide channels on your PC, free
of charge:

I have an Eizo F55S monitor and the image is not very sharp. I guess i
is a low contrast problem. I have adjusted the contrast to 100%, bu
this does not eliminate the problem. Are there any internal switche
that could help?

Hi again, I have a 25" RCA Stereo Monitor TV that I am playing with now.
It has no source video, just black screen, but the audio is fine and the
menu functions show on the screen if I press the menu button. You see
the audio bar too, if the audio is adjusted. The channel shows ...

A while ago I have been given a digital readout system for the lathe
(DRO) from Mitutoyo, with AT11 series linear scales (rulers).
It needs a bit of work done though, mostly because the connectors have
been cut off from the linear scales. After a bit of research on the

 I recently purchased a broken 54520A hoping to be able to repair it.
The seller said that the screen was faulty. However, after the
oscilloscope arrived, I saw very soon that the problem was not the
screen but something else.