O.k...last post before bed time! I ran the motor for some time while playing with the oscilloscope. The motor quieted down considerably and now is virtually silent. The current went down to ~15 mV at 4.4V. I guess some old lubricant...I hooked up the oscilloscope to the generator output (blue/white) and it shows 200mV peak to peak (see pic below). Question

That was quick! I received some very friendly (off line) advice, and ran the motor on its motor leads (red and blue), and at 4.5 V it draws 30 mA. It spins up nicely, but makes a bit of a ruckus, like it may need a bit of lubrication. Although with platter mounted I was not able to hear anything before the fuse blew. Is this noise normal when it runs

Thanks again for all your input! I had a bit of time and tested the slide motor. It seems to run well and the slide moves reasonably fast at about 4.5V while drawing about 60mA. That much for "why the H-bridge transistor died".... I am a bit confused about testing the motor for the table. I think I have the "servo controlled DC motor"

Hi Martin, Soren, Thanks much for the replies! Did you use non-backed (i.e. "100% wood") veneer? The links you posted, did you buy from them before, or are these just examples? I am asking since I already bought some veneer online, and the product that arrived at my doorstep looked somewhat different than the picture given on the website.

Here is a picture of the veneer remnant that I have. The original may look a tad more red than it came out on the pic. Thanks! Rudy

Hi Vintage Enthusiasts: I am trying to find veneer with the proper grain to fully restore my recently re-capped and re-bulbed (thanks for the bulb set, Martin!) Beomaster 1900. The local stores here in Tampa do not have anything close to that finely grained rosewood or teak that was used on these beauties. I was wondering if anyone had figured out a

Thanks much for your detailed input!! Much appreciated! I will test the motor and do the powersupply ramp-up you proposed and report back! With regard to the cartridge, I do not have a cover at this point (a typical ebay trade, I guess...). There is also a dent in the aluminum top of the cartridge (the 33/45 speed adjust panel popped out during shipping

Hi Martin, Thanks for your input! With regard to "fit the platter motor plug to the wrong connector", is there anything that should be connected to that second plug (P2) labelled "LED"? I do not see anything in there that was disconnected and could fit there... Checking the servo motor: I thought to connect a power supply where the

Thanks for your insight!! Failure is not an option...;-). I read a bit up on motor controls to understand your H-bridge comment. I gleaned from the 4002 circuit diagrams that I have, that TR20 is connected to on of the leads to the slide motor ("servo"). A closer look at the circuit board revealed that the trace from emitter to P5 is indeed

Thanks for your quick reply! Is there a way to confirm prior to repair that the items connected to the board are in proper order aiming to prevent killing the board again once it is fixed? Thanks! Rudy