Electronics Forum / Repair / March 2005

I have a Sanyo 900MHz cordless phone (model CLT-9922). In recent
weeks, when I put it on the base unit to charge, I don't hear a *beep*
sound which confirms that charging is taking place. However, the LED
on the base unit does light up as if to indicate the phone was

If you were looking for a technician's job, how and where would you
look? We have advertised in the classifieds for weeks, several times
during the last year, trying to find someone to help us with
televisions and audio gear. Response has been disappointing.

Hi all, I need the schematic for the input board for this CA12. It has
burnt surface mount components that can no longer be identified. The board
locations of these parts are: R175, Z101, Q110, Q106 and Q108. If anyone
out there has the manual and I can get a copy of the input board ...

I've been having a nagging problem over the last 15 months or so where the
blue tube on my Pioneer PRO-510HD never seems to completely shut off causing
visible blue hue during dark scenes . Hue is basically trapezoidal and
accompanied by inverted arc running along top of screen. ...

I’m looking to transfer my old VHS home videos to DVD.  Anyone
have opinions on these Dual-Deck VHS VCR/DVD Recorders?
Thanks
TP

The scope is a Tektronix 2465a, I don't have the S/N offhand, but I
can get it tomorrow if needed.  It's a newer unit, with all
pushbuttons instead of toggle switches.
The problem is that when in delayed sweep, measuring delta t using

I have a problem with this DVD player.  Occasionally it gets a burr up its
butt and doesnt want to play a certain disc.  A couple cycles through Power
On/Off and it works.  The real issue I am having that I cant pinpoint is
that it makes this clicking noise when I load in a disc, ...

I've just picked up an old Panasonic TX2122 TV. It has a problem with
the picture which shows up as two wide vertical white bars one the
screen, which are obviously some sort of distortion on the signal.
I get this when receiving a picture via RF. However if I play a video

I've got an InFocus LP435z DLP projector that's driving me nuts!
The lamp (HID type) intermittently fails to ignite.  Sounds like a bad lamp but it's not - the problem is it doesn't even
*try* to ignite.  The unit makes a distinctive noise when the "starting" circuit is going and ...

I have an old Sony Beta VCR, model SL-2000, which has a broken guide
pin. That's one of the steel pins that pop up from the threading ring
where it pivots on a plastic hinge.
The plastic hinge has broken and I'd like to fix it. I had another one

 I've been given a wavefront travel case Theremin to repair.... seems the
power supply is dead, it has a 3 pin DIN connector alas I am not 100% sure
as to what the voltages should be on these pins? Is there anyone out there
who knows? I tried e-mailing the company however haven't ...

I lost vertical deflection to the top half of the screen--the bottom half is
perfectly normal.  From this and reading here it looks like the npn or pnp
of the vertical deflection is blown (I am no technician so this is as far as
I got).  At any rate,  I would like to get a TDA4856 ...

Hi all. I have here a Sony KV-24FS100. 2003 model. Came in with the
following symptom -- hit power button and red led flashes twice. After doing
some looking over and tests, where starting would produce a shaky hum for a
couple of seconds, I looked over the horizontal section. All ...

I hope this is not off topic.  I repaired leaking tubes on this set.  I now
need to adjust convergence.
I am using the convergence menu built into the set.
My question is how wide and tall do I make the grid on screen?

Can anybody in this group provide any guidance to obtain schematic diagram
for TV Toshiba model.This model use processor TMP47C432AN.symptom is no 5V
on pin 42 of processor chip.
Without schematic is very difficult to locate culprit.