Electronics Forum / Repair / September 2007

What I;m doing now is doing test of a rf signal generator.
When I turned it on, it showed Uncal warning and generated no rf
signal.
Meaning of  error code was that PLL is unlocked.

I own a Tektronix TDS754D 4 channel sampling scope. Unfortunately
three of the four channels are showing wrong voltage levels. I already
took some measurements on the aquisition board. For me it looks like
the input amplifier ceramic circuit boards already produce the error.

I am trying to figure out why my firewire port doesn't work anymore on
my camcorder.
I am wondering just how the inside of it works - where the pins meet,
but I can't seem to find any information or images of what it looks

Can anyone suggest a company in Melbourne, Australia that could repair
a Sony Hi-Fi amplifier (str-de525) which has a non-working subwoofer
output?
Thanks

Just curious as to some idea of what you find people will cough up for equipment
repair.
I got a surprise last year when Shuttlesound (a UK pro-audio distributor)
informed me that they charge £35 (IIRC) per 'unit of labour'. The unit in

This tv is somehow stuck in display mode.  It scrolls this message on
the screen:
I-CON MENU
AUTO CLOCK SET

Why always me, and this is at the other place ! I mean the new old
shop rather than the old new shop. There I usually didn't have as many
problems like this, but today it happened.
This set was blown out in a storm, and it shows. A rebuilt LSB in now

Just obtained this "600 watt"  RCA HTS6000 3 disk DVD receiver and wondered
if anyone had any information about it please?  All I can find is
http://www.radioshack.com/graphics/uc/rsk/Support/ProductManuals/3105020_PM_EN.pdf
Looks like a high quality, well constructed item with ...

I am trying to figure out why my firewire port doesn't work anymore.
I am wondering just how the inside of it works - where the pins meet,
but I can't seem to find any information or images of what it looks
like.  Does anyone know?  I have taken apart the cable, but not the

I've got an intermittent problem on a 27" Sony TV
KV-27S36 where the picture "rolls up its eyballs"
and then goes blank:  The bottom of the screen
goes blank first, and an up-shifted picture shows

I have a problem with my Panasonic DMRE85 when it comes out of standby
mode. It seems that whenever the hard drive has to fire up from
standby (when the machine's on but the HDD has gone into "sleep"
mode), or when I switch from DVD to HDD, then it thinks for a second

Was running this box on 98 remember ? Well I had to do it. Put in the
XP disk.
I had to get a patch for my incredibly cheap soundcard, which I
shouldn't have because I run my main music out the PC, but oh well.

Not mica and not the grey plastic-like stuff, anyone familiar.?
They are on a Kustom 6160A mixer amp, USA Kustom , not Custom, under TOP66
trannies.
They have shrunk on the upper section (hottest ?) to the point of very

Not to take too much of your time, here's what happened:
I took my magnavox projection tv rear off to clean the guns and the mirror.
While wiping it out I hit the color adjustment knobs in the back. I tried to
"fix" it and obviously it got worse. Is there a "trick" to setting the

Tascam MS-16 diode
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My Tascam MS-16 seems to have the zener diode problem perfectly