Electronics Forum / Repair / October 2007

Does anyone have a service manual for this tv?
Thanks

Does anyone know what the differences are between these two models of
scopes (if any)?

Ideally identifying which and dismissing the roady would make more sense for
this locally based, but made big-time band.
Failing that - concerning cut grommets encircling valves to act as retainers
in inverted amps. Lining the holes in the chassis where the valves pass

I have an AVO 2 panel valve tester which I intend to clean and get working.
I have the circuit diagram and operating instructions. The Serial No. is
12372-147.
As I don't know if it is faulty or not I am proceding with caution.

The amp goes into standby after about 5 seconds.  All the output
transistors checked ok, so I put an oscilloscope on supplies and
checked +/- B (50 volts).  The +50volts are fine, but the -50volts
supply goes to -50volts and then within a second goes back to zero.

In response to someone who emailed me a couple of
months back saying he did not believe it
was possible to desolder , with a hot-air gun,
ICs soldered in plated through hole pcb boards,

I picked up a Xerox Phaser 6100 which starts the warmup cycle and then fails
with a fuser low temp error. I've only done a quick check so far and
verified that the fuser is stone cold. Before I tear into it, does anyone
know if there's a common problem with these? I'm thinking so ...

As per subject really. I have the user manual and service manual, but I need
the schematics to debug a start-up issue.
This unit has been out of support for 12 years. But it is (well, it was!) a
damn good unit.

I have this power supply we  stripped out of a pc we're junking. It
has a 12V 10A section. I would like to use it as a 12V bench supply
for testing and running equipment. I have no plans for the other
supplies. Can I run it and the other supplies unloaded? And can I just

Hi. Got a Mits WS-55907 here. Odd problem if they are linked somehow,
otherwise 2 separate problems.
Anyway, first off, I will replace the convergence STK392-570 chips, as I
have good power to them.

My TV works fine except that it won't stay on the channel it's set to.
It keeps cycling through the channels as if the channel-up button is
being pressed.  The problem is not in the remote, since it happens when
the batteries are removed from the remote and the remote is put in a ...

we are Chinashoesaaa International Trade Co.,Ltd in Fujian of China.We
are very professional supplier of selling Brand shoes such as
Nike,Jordan,Adidas,Puma,or more Air Max,Air Force1,Shox,Dunk,and so
on,also T-shirt,jean,Watch,Sunglasses,Hat,Handbag in hot sell. We

Need to reuse, after someone yanked the wires out, it is a non standard
form.
Any tips for removing the little gold plated IDC prongs without destroying
the outer plastic ? As long as the shell is not butchered then I can rob the

A friend of mine at work has a Techwood PLR85 Home Theater Receiver.
He recently had a party, and had a couple speakers outside, connected
to the receiver (indoors).  A sudden rain shower got the speakers (not
the receiver) wet outside, and since then, whenever he tries to power

Just got 7 420W pc power supplies in which have all the same capacitor
1000uf 16v popped, as these were made in 2006 i am suprised, that was a
problem of the past or are there more people here that still have
trouble with capacitors?