Electronics Forum / Repair / September 2007

I am working on my daughters Marantz 1977 player piano. I've got some ac
type buzz in the 170 volt dc solenoids. I figure that the filter cap is bad
(Sprague suggests 1000 hour life span, so 1977 to 2007 that's 30 years, so
1000 divided by 30 = 33 hours per year,, bet its got ...

Anybody got any data on a VGT7616-2077 ? Particularly interested in pinouts.
It's used in a Burle video surveillance camera, so if anyone has any
schematics for any Burle cameras, it may appear on one of them. Can't give
the model unfortunately as, even though there is a model / ...

In the name of Allah, Most Gracious, Most Merciful
[19:1]   K. H. Y. `A. S. (Kaaf Haa Yaa `Ayn Saad)
[19:2]   A narration about your Lord's mercy towards His servant
Zachariah.

I'm trying to fix a Gateway pc with bad caps on the MB. I managed to
remove the bad ones ('Chhsi' brand name) and clear the holes.
I need (3) 1000uF 6.3v HM(M) and (2) 1500uF 10v WG(M) electrolytic caps.
I'd been believing the replacements would cost ~ $1 each. But the local

Hi. Got an ATC221 RCA set (D52w20YX1). Had no green image, just raster.
Green crt board cold. Replaced board, got green back but tube is weak. Has
anyone got one of these sets due for scrapping with a theoretically good
tube? I can get new but customer doesn't want to spend too ...

Greenhelm Engineering is looking for volunteers who wish to make a
difference by applying their engineering and technical skills. To get
involved in the Greenhelm projects or to learn more about the
organization, please visit www.greenhelm.com .

I lost the original remote. The television has gone into a "Installing
Guide Plus data now. Turn TV off during installation. Home to delay,
Cancel to abort."  It has not gone off this mode in three days???
Thanks for reading this!!!!

hi all, I have an old notebook and i want to upgrade cpu. I find a
ciryx gp100 100mhz socket3 cpu. this cpu need 3,45 volt but the old
cpu uses 5 volt. I don't know where(if there are any) the jumper to
select voltage is on the mainboard. I don't know the type of mb and

I collect old calculators, digital diaries and databanks.  Is there
anyone out there who can repair them.  I am happy to pay the going
rate for this.

I need a small circuit that can disconnect AC power (means will have a
relay) when it detects freezing on coil. I have a non working
appliance that I want to power up but also include a antifreeze
circuit design  so that when it senses ice or freezing on the coils it

No audio on RCA TX808H tv.  It's a 13" tv and should be relegated to the
trash pile, but it's my gf's dad's tv and he was hoping it could be fixed.
If it's not the speaker or audio cable then it looks like maybe some board
repair is in order.

Does anyone know whether an Infinity subwoofer BU-120 is the same as
their HTS20?  Externally they look identical.  TIA

I have a Sony V402A VCR remote. Some of the functions have quit
working (Slow, Enter). The Sony manual is no help. Batteries fresh.
Has anyone run into this?
Thanks Chuck

A life saver at www.stevesgiftsandmuchmore.com visit our tools section
page 2 and view an ultra powerfull roadside flashlight.

My TEKTRONIX 5403/D41 oscilloscope is died. The fault is likely in the
low-voltage power supply section, but unfortunately I have not the
manual, so that I cannot repair it...
Can anybody help me..? A simple *.jpg scan of the supply-schematic may