Smoothing Rectifier Resistor

I just cannot leave a sleeping dog alone. About 5 months ago I decided to make improvements to my Seeburg DS160, which was playing just fine. Refinished the sides, re-chromed many parts, polished stainless steel pieces, repainted upper grill and am now in the process of putting the machine back together Now when I make a selection the phono plays the record it wants to play, which is never the selection I make Looking at the trouble shooting manual I have eliminated clutch worm binds on clutch shaft and bind in trip mechanism. That leaves me with "Smoothing Rectifier Resistor Open". It would help a novice like I if they would at least tell you the resistor is R514 or whatever the actual part number is, but no, they do not identify the resistor well enough so I can find it. Will someone be so kind as to assist me by telling me which resistor they are talking about if possible by part number?

New error now going on, it plays more selections than selections made.

Also notiice that from parked position it immediately selects U8?

Best
Darrell

Hi Darrell,
It's in the service manual, my "Seeburg Mechanism Guide" and in the parts manual--But I doubt that's your problem--betcha that it is the same problem you had with the 100- 77 (78?) D model---
Ron Rich

Darrell, the smoothing resistor is on the mech at the right connecting the selenium rect to the terminal strip.

It is not really needed and is not your problem.

Possible causes:

Excessive write-in current. Are both 0A2 tube glowing? the voltage at the 10mfd cap that filters the W-I voltage should be approx 145vdc.

Sparking at the center plungers on the Tormat block. Test for this by starting a scan without making a selection. Manually pull up the add solenoid on the scan assembly.

Poor ground return on the Jones plugs.

Poor ground on the RCA plug on the RCA plug.

In odd cases a 12AX7 that has developed hot spots on the cathode will become overly sensitive. Test with another tube.

Remotely possible that the ceramic filter caps in the pulse amp or at the 2050 socket have lost capacitance allowing transients.

Rob/NYC

Ron & Rich

Ron has partially won his bet. After cleaning and tightening the RCA plug the phone began to make selections, however it seems that now it is almost always off by one letter. For instance if you select B-1 it plays A-1, C-1 plays B-1 and so forth.

The manual lists the three things I posted. Ron's manual lists 4 items. I am going to try the easiest first, add lubriaction at points mentioned. If that does not work I will need to investigate some of the other excellent ideas both of you have presented,

Thanks a bunch.

Best
Darrell

Darrell,
Try all four numbers at the ends of the rack. If you now get the "wrong ones" check L/R alignment of the TMU--
Ron Rich

Hi Ron

Selected A-1 played A-1 likewise with B-1, C-1 and D-1.
Went to other end of rack selected V-8 played V-8 likewise with U-8 S-8 and T-8, with the exception when I selected S-8 while U-8 was playing U-8 immiediately ejected record & went to S-8 and wile that was playing I selected T-8 and once again it immediately ejected the record and then played 3 random selections before parking.

Best
Darrell

Hi Darrell,
You have a "ground" problem of some type, or a problem in the TSU/USPU/TES circuit.
I would first check that the screw holding the 5A fuse on the front of the mech was tight--and all "soldering" in that area is good. Then I would measure the resistance on the socket of the ground connector of the mechanism plug, thru to the ground lug on the bottom terminal strip of the mechanism. I have found many sockets that have lost the ability to make a good connection on the TSU mech socket. Should that be good, the EZ-ist way for me to proceed would be to swap the above items, one at a time. Ron Rich

Ron

Plan on checking all the above, as I suspect that is what causes the now very rare playing record ejection when making a selection from the key board.

It is amazing what cleaning and tightening the RCA Plug and lubricating mech points in your guide will accomplish! Yet the manuals never suggest that as an option .

The phono is currently selecting and playing flawlessly.

Thank you so much,

Best
Darrell

ds100h wrote:Ron

Plan on checking all the above, as I suspect that is what causes the now very rare playing record ejection when making a selection from the key board.

It is amazing what cleaning and tightening the RCA Plug and lubricating mech points in your guide will accomplish! Yet the manuals never suggest that as an option .

The phono is currently selecting and playing flawlessly.

Thank you so much,

Best
Darrell

The reason the manuals don't mention "cleaning and tightening" of such things as connectors is....
Because AT THE TIME they were printed, these models were not AGED as they are now.
Corrosion, tarnishing, and other AGE-related issues were not part of the servicing equasion back then.
How could they be, it happens "in the future".

Well put Matt--you done stolt the wordz rite outta my mouth--(Attsa the reason I wrote my "Seeburg Mech Guide" )
Darrell--
Seeburgs SELDOM "Eject" records. If, when, they do, there is a MAJOR problem. Now if you mean it "Rejects" records when a selection is made, that's usually a keyboard or sometimes, a TSU problem.
Ron Rich