Grundig SO 120 Record Changer wont stop changing

My Grundig Record changer, model TW 504 G is conintually trying to change records (after much much lubrication). If I leave the ballast arm up it is in an infinite loop. If I put the ballast arm down it drops, plays for 3 seconds, and then the tonearm returns to its resting position and the phono turns off.

There must be a "end of record" mechanism stuck but I can't find it! I find where the tone arm moves a lever as it goes across the record but the leaver isnt connected and doesn't push anything. Any help would be appreciated!

There are five parts that work together to trip the changer at the end of the record:

1. The trip finger is rigidly attached to the tonearm shaft. It moves with the tonearm.

2. The trip slide is pushed by the trip finger or the reject control. It is a lightweight slide attached to the main change cycle slide. The trip finger pulls it away from the turntable hub, beginning when the arm is about 3 inches from the spindle.

3. The trip friction clutch is located on the change cycle drive gear. the trip slide moves it, and it transfers motion to the drive pawl. It must NOT be lubricated, or it will malfunction.

4. The drive pawl is also mounted on the change cycle drive gear. The friction clutch moves it toward the turntable hub. It must also not be lubricated.

5. A projection on the turntable hub strikes the drive pawl once each turntable rotation. The turntable hub projection pushes the drive pawl back while the record is playing, because the pawl advances just a small amount. When the arm enters the runout groove, the drive pawl advances farther, and the hub projection drives it hard, starting the change cycle.

A projection on the trip slide resets the drive pawl at the end of the change cycle. It also pulls the trip slide back to its starting position.

The following can cause the trouble:

A. The trip slide is bent. This usually happens if someone raises the overarm from the shutoff position during the change cycle, or tries to keep the control knob from switching off after the last record.

B. The drive pawl or friction clutch is gummed with lubrication.

C The drive pawl has become disconnected from the trip slide.

D. The reject control linkage is disconnected or bent.

E. The friction clutch has been disassembled and reassembled wrong.

F. The turntable bearing has been replaced with a bearing of a different thickness, or washers have been left out. This makes the turntable projection hit the cycle gear instead of the drive pawl.

This is a wonderful reply. Thanks. The drive pawl had become disconnected from teh trip slide. I had only been looking at the trip finger and slide. NOw it works like a Perfectly.

I am having a similar, but slightly different issue with my TW504G. When I initially load an lp and select "reject," the spindle correctly drops the lp. But the tonearm lifts, moves slightly to the right, then drops back into place and the machine switches off.

I have a copy of the service manual, and it describes the procedure by which the return locater plate will determine where the tonearm drops. I have been studying these parts, but can't yet determine why the cycle isn't completing. Is this a common occurrence?