Electronics Forum / Repair / May 2004

Would like to get any info on the Bell & Howell School Model 34
Oscilloscope!
Thanks

I have a Sony Wega 36FS100 and I have a 0.5"x0.5" puncture in the right
speaker casing.  Really the only issue here is an eyesore, it looks like the
plastic was cracked and pushed in.
Question is, has anyone gotten to the point where they can remove this

I've got one question: The TDA 3562A (datasheet available at:
http://elve.le.ttu.ee/~tsamel/datsheet/TDA3562A.pdf) provides, as far as I
can understand, principal two inputs:
1st: Luminance/Chrominance (SVHS)

Anyone who read my " people are so ignorant " post   -  sorry. Particularly
if you were one of the four.
As I said, I haven't been using newsgroups recently, and I've just spotted
that the return e-mail address I'd got set for usenet use, is one I had to

I have a TV that has a NPN Horiz. Output transister with the number 1881 on
it.  Since it is Japanese and and AF application NPN xsistr, I suspect it is
a 2SD1881.
I cross that to an NTE2353.  That is a Horiz. Output transister, but it is a

I have located an open resitor on the neck PCB.  It looks like 1K ohm.
Anybody know if this is a typical value the G2 voltage limiting resistor.
It is a Zenith SMS1935S.
Thanks

I have this HP laser printer which senses the presence of a paper
butwhen I want to make a test print the machine does not pick the
paper. The printer will initialie alright but just @ the momment it
has to pick the paper all the motors ceases all the 3 LEDs on the

I've got a big problem - perhaps anybody can help me:
I want to connect my DVD player to my TV, but there is a problem: The TV
(Telefunken PALcolor 560V) is very old (20 years *g*) and it has no Video
input. It has a 6 pin diode connector, but only the audio relevant pins are

Someone (Patch?) answered a post from somebody who had one of these which
was shutting down spontaneously; with a query as to whether it sounded like
the tape transport was trying to cycle before it did so.
The OP's unit didn't fit the symptom, but I have one which does.  I posted a

I have a HP camera that took an unplanned trip down a flight of stairs that
now needs repaired. The only part I'm not able to repair or replace is this
tiny a.s snap action (basic) switch that closes when the shutter is closed.
This thing measures 6mm tall, 5 mm long, and 1mm wide. ...

I got this SMC Barricade router SMC7004BR. One day it got turned off. Now
when I turn it on, it will take several minutes to power up (warm up?), then
will start working perfectly. If I turn it off and then back on, when the
router is 'warm', it turns on right away. Takes another ...

   I have a Zenith TV 9-2065 (mfg 1999) in my shop, no color, good
B&W (I checked color setting).   However, the menu is in color.  This could
have been caused by a power surge,  but the customer isn't sure.  I do not
have schm.  What is the most likely cause?

I am looking for a couple of the old 5101 CMOS RAM 4x256Kb chips and
information on them and the manufacturer.
Thanks
Lionel

Hi All,  but this question only really applies to UK readers.
I am looking for a long range video transmitter, a wireless type.  So that i
can transmit video from one location to another (if it did audio it would be
an advantage but not essential) So far the longest range one i have ...

I have a Dell UltraScan P991 (AKA Sony) monitor that exibits excessive
screen briteness and retrace lines. Opening it up and there is no pot
adjustment for screen
or G2 on the flyback or anywhere else I see. Is this adjusted  with DAS