Electronics Forum / Repair / August 2004

I am working on a multiband portable radio, The BandLeader by Randix,
Model No. MB 5552.  One of the wires going to the speaker has broken
off the PCB.  The other wire goes to a LA4100 chip.  I did a google
through 10 pages of matches and found out the LA4100 is a 1 Watt audio

I am searching for a schematic, or alternatively information on a
replacement tuner lamp, for a Proton 320 clock radio. I'd appreciate any
information very much as I have it apart on a table and can't go any
farther. Thanks in advance.

Voilà :-)

My KOSS KS2503 Home Theatre died while watching a movie.  I replaced the
fuse and it blew again.  I would like to replace the power supply, but KOSS
won't sell it to me.  Can anyone tell me where I can get KOSS parts?

does anyone know something about the bimetallic switch below:
ELTH
Type 261
16(3)250

I have a panasonic camcorder NVGS4 (I think) and on Sunday it refused
to read the SD card. I have been happily taking stills on it for a
couple of years, and have always deleted them when transferred to the
pc, so it isnt full.

Anyone have any of these used, or know if they are making any as
aftermarket? No. On the FBT is: 24D25240B23-185
I cant believe so far no aftermarkets were made up on this classic Arcade
Game! If anyone has a Used working One, send it to me and I will get a bunch

i'm looking for the service manual for a Pioneer PDP-V401e plasma display.
or alternative - a way to repair the Y drive assembly.
the story goes - i had a white band across the bottom 1/4 of the screen.
i sent the display off and found out that an opto-coupler had failed, there

Hi all;
Anyone ever run into this ? Set comes in no green, tube is fine. Problem was
the basic 82K resistor but it now has a more interesting symptom, lucky me.
Now when you go to the menus the base greyscale shifts. When you got a blue

just out of curiousity. does anybody know what IC does a USB thumb drive
installed with? just came across my mind to upgrade my 64MB to say ....
256MB by swapping the IC inside the thumb drive.
thanks

Need Owners Manual, For Sylvania model SST4272.

I have a Mitsubishi CT-20AM1S(A), which looses the tune on the VH high band.
Would it be a faulty tuner or a fault on the board. I think this has a AL-5
chassis.
All other bands are fine and it will hold its tune for up to a day then

I picked up two non-working Tek Scopes a TDS540 and a TDS520.
Previous owner swapped the processor boards, unprotected the
calibration ram and let 'er rip.  Apparently there was all manner
of complaining from the scope before it locked up.

This one's for the archives.
My microwave is a Kenmore, model #99921 (564.9998210) with a Sanyo 11355
controller board.  Symptoms were that the light would come on with the door
open, but the only activity out of the display was to show a 0.

I am working on a multiband portable radio, The BandLeader by Randix,
Model No. MB 5552.  One of the wires going to the speaker has broken
off the PCB.  The other wire goes to a LA4100 chip.  I did a google
through 10 pages of matches and found out the LA4100 is a 1 Watt audio