Seeburg S100 Phonojet Hey Ron need your Help!

Hey Ron need your help ! Working on a Seeburg S100 Phonojet. Got two problems... First, got a trip problem in the SCC6-56. Doesn't trip every time I make a selection and sometimes the trip relay stays energized and I need to unplug to reset. When it stops triping, I can make it trip manually by pressing the relay or by making contact with probes on the base and the emitter of the transistor SCS3100... Also after I make that contact, it does restart triping for a couple sélections ... I think its the SC3100 that is defective ... What are your thoughts on that ? Second problem (related or not... ) When it does trip on its own or when I make it trip, the record plays backward.... the motor turns backward. For some sélections, once in a while it does turn the right way... I'm stumped on that ...

Oh yeah ! Forgot to tell you that I re caped the SCC...

Are you "sure" of what you wrote here ?
If the trip relay is staying energized but the mech is NOT detenting to pick up a record, the relay contacts themselves, or the clutch reset contacts ( the outer set of two, that lay sideways under the large stack of contacts) are not making good contact-- If remaining energized after picking up a record, it also can be a set on the relay, or the bottom set on the upper stack, that should open when the needle touches the record.
As for the motor running backward--I doubt that's happening, on that model--most likely the tone arm is failing to shift--lack of proper lubrication---Ron Rich

Thanks for the input ! The trip relay SOMETIMES stays energized and mech doesn't detent. But when mech detents relay always reset. I Cleaned every contact and verified aligment.... Looks good. How do you explain that sometimes it does make selection and others scan twice plays nothing ??? Battery test is ok, read out is good... So its trip circuit ??? Its intermittent.... As for motor, you were right ! Lubrication and tonearm springs were the culprits !

Its probably a dirty contact somewhere... but where ??? will do them again...

I don't have a schematic of that mech handy--but if the relay is energized, and the mech detent coil is NOT energizing, there are only three possibilities that I can visualize.
If the coil IS energizing, but the mech won't detent--more "lubrication" problems, in the clutch area.
1. On the "center set of (two) contacts " that "lay sideways", the one closest to you, is not making good contact--"miss-adjusted"--should be open 1/64 n in PLAY position--closed in scan)
2. The "detent set" of contacts on the detent relay are not making good contact.
3. The wire, in the mech cable, going between the detent relay, and the set of contacts, in #1, above is intermittent--
Aside from that, you well may have write-in problems, in the pricing unit,TES, or SCC.
Ron Rich

Thanks Ron! Will do my homeworks

My second Juke is an SE100 Goldenjet, I beleive very similar to the S100 as I use a manual that covers both.

Mine also had an intermittent fault selecting as you describe, which was present when the previous owner sold it to me.

-It was only when I moved it to the garage and found it played OK for a while after - that I realised it could be a loose contact.

After a long search it turned out to be a broken leg on the silicon controlled switch (SCS3101 309472) thyristor in my SCC-9 control centre (which may be a later version to your control centre). it is this component that takes input from the tormat phono connector input and triggers the system to select.

I changed the SCS3101 and it was OK!


ps - I got my spare from jukebox-revival.nl their part number SKU000695 and a couple more in case the same one in my SS160 packs up!

Good luck - Kevin, ss160uk