Electronics Forum / Repair / February 2006

Could someone please help me with a schematic or service manual for
Polycom PVS-16XX video conferencing station. The unit powers up and
begins to perform its reset procedure with the camera head moving left,
then comes to dead centre (horizontal and elevation) and then goes limp

Hallo members, my Philips brand of DVD player have some kinds of
electric shock if you
touch the metal panel. I measure the leakage voltage is 125 volts but
the leakage current

Any takers? It's an 8 pin DIP found on a barcode scanner laser
diode driver PCB.
Google appeared to be hopelessly useless.
There's also an 8 pin SMT part labeled:

I have a Panasonic TX-25X1 tv which has developed a fault, the sound
only works through composite inputs as scarts and tuner have no sound.
everything else works fine
Any suggestions welcome

I have a GE TV, model 31GT720 with a strange problem with the audio
processor. On occasion, the processor will flip by itself to the SAP
channel. When I go in via the remote to try to switch it back to the
main audio channel, it won't change to anything else. It's just stuck in

 I have a Compaq Presario 1060 laptop (WIN95), bought around 1997.  It has a
game port connector.  I have two analog joysticks (Kraft and Quick Shot,
QS201) which I am unable to use in Dos mode (Windows shut down).  I can use
them at the Dos "Prompt".   I couldn't find a Dos mode ...

I've been following the electronics newsgroups for some time, and decided to
try a small repair job.  I have a 20Wx2 small single-board amplifier which
has only worked on one channel since it was given to me.  Due to its' small
size, I'd like to repair it.  Anyway, I used a DMM to ...

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I've got a Rat Shack (micronta) 22-174B that I use for my hobby, which
is building guitar effect pedals. It's a cheap unit, but it's got the
functions that I need, such as a capacitance meter, hfe, etc.
Anyhow, I can't get good ohm resistance readings at all anymore. It is

hi i was doing some keyboard repairs at a school today and both my
desolder pumps stopped working - i determined that the cause was not a
blockage as usual but that it needed lubrication - i asked the janny
for some wd40 but he didnt have any but he suggested washing up liquid

Well after spending most of a day, pondering the schematic, changing a
few caps and a lot of thinking and probing, it seemed that I could make
it verticle jitter by probing the pieces parts of the set, but not with
100% certainty.  Then sliding each yoke back a little and rotating,

I have a toaster with a problem. It has a large self-adjusting width
single slot with an electric motor to lower and raise the
bread/waffle, whatever. The heating elements consist of 2 long white
ceramic cylinders, one on each side. The problem is that these only

My Rotel RCD-02 (which is similar to the RCD 961 / RCD971 in europe
is no longer playing compact dics.
Unfortunately this may be due to my own fault as the unit was lef
switched on and placed on top of my Marantz class A amp which get

Hi, I've been searching with no success for a specific type of audio
Y-adapter.  Was wondering if anyone knew of a source.  I should
probably mention I've tried using combinations of RCA-to-3.5 mm to get
the desired result, but for my application space is tight and the RCA

I'm trying to repair the TV specified in the thread's title.
It was working fine but about a week ago it started intermittentl
shutting itself off and back on.  The picture looked fine while it wa
on, but after about a minute or two, the screen would shrink to a shor