Electronics Forum / Repair / March 2004

 I am looking for a schematic and any other available information on
a Zenith K731 AM/FM table radio, circa 1963, which I won in an ebay
auction last year. I had a couple offers in my email awhile ago
(responses to an earlier request for the same info), but they were

I have a a Panasonic stereo system that had a problem where it wouldnt
come out of standby mode. I traced the fault to a faulty resistor and
replaced it. Now the lcd display shows all of the segments. I have
been told that the IC needs to be reset somehow but I am not sure how

I'm searching the schematics of the HP moseley 7035A.
My HP has a drift issue.

I have an old TEAC DC-D2200. When playing audio CD I have
a channel (right) wich give no sound or very disturbing sound.
according to the service manual, this part is made
of I/V converter and a Low-pass filter with KIA4558 (dual dip 8 OpAmp)

I found this wonderful tip on how to repair the over-brightness
problem in my DELL P1110 monitor:
http://geocities.com/gdaewoo_cmc1511b/cpd-e500_dell-p1110.zip
Now... the only problem is that the last time I repaired monitors/TVs

I have an Iilyama 502 21" high resolution video monitor - on high contrast
images it exhibits some ghosting on the right edge. This ghosting can be 2
or 3 evenly spaced edges following the the true edge.
I know there is edge enhancing circuitry but I am looking for some clues.

this HP 21" monitor runs fine. On initial warm up the picture remains steady
for some minutes. After that, randomly, the picture shows a glitch. This
shows sometimes with a horizontal stretching for a brief moment (then
returns to normal) sometimes the lower half of the screen ...

Hello I'm in search of front display light bulb for a Pioneer SX-737
receiver, I'm looking for an exact replacement, I'm not going to alter
anything with in this receiver. It works perfect other than a darker spot in
the display. There's a picture of the light bulb at:

Zenith combo TVSR1302S - Problem: It tries to come "on" but doesn't!. Checked
all voltages  and they're within specs. Changed D2058 (switch transistor) that
controls the 9V supply along with electros since this is the voltage going to
the VCR motor. Motor oscillates back and forth ...

I have a Zenith Sentry 2 that I brought in 1994 the picture is good but
when you turn off the TV you can still hear the sound. Any suggestions?

Have a satellite receiver, RCA Model DRD420RE with burned components
in the primary side of the switch mode power supply. These parts are
badly burned and charred to the point of being unrecognizable. Need
part ids for the following:

Dear friends,
I have a problem with my toshiba tecra 8100. There is no power at all
even with AC adapter plugged in. The AC adapter led is not on either.
I went to a repair shop and they said that there is corrotions in my

The Mitsubishi CS-3515R in question powers up with the picture compressed to
a horizontal line half way between the top and bottom of the screen.
Sometimes, if the set is left on for a while, the picture appears; on
occasion alternating between the line and a full picture.  Other ...