STD3 needs 5 minutes to select

STD3 jukedox all recapped , black & gray boxes resoldered . This machine works just perfect in every way accept the fact it takes aprox 5 minutes for it to take a selection .
Cold turn on . Select a song , it will scan without picking up the selection till you wait aprox 5 minutes warm up then it works fine all day .

Ken,
What, didja "re-solder" on the boxes ?? Did you check -13 and -27 dc when cold/hot ??
Ron Rich

Hi Ron . I always resolder the long connector pins in the boxes . I have not tested the voltages . I suppose this is done on the test screws at the end on the select chassis .
I have not worked on many of these 70's machines and sure coming up with some strange problems .

BTW ... That ROWE 74 i was having so much trouble with it rejecting then not rejecting . I finally had to ad a wire from the non ground side of the eject circuit to the reject micro switch . It fixed the problem .
As for the original problem i can only guess a wire somewhere inside one of the plastic connectors had lost its connection within one of the pins where its crimped . I had this happen in a pinball machine but i found it by some sort of luck .
After servicing the amp ... sure good sound for such an ugly jukebox !

I saw the customer who got your new computer ( same guy has this std3 ) and he has already read and understood the programing . He has it on basic free play now and really likes your product in his machine .

Hi Ken,
I'm still confuzzed--which "long connector pins", in which "boxes" ?? If you are "opening" black and gray boxes to do that, you are taking an awful risk of degrading the LSI. Of the thousands of those boxes I've repaired, I can count the number of "cold soldered joints" I found, on one hand ??
Glad he is happy with the SMC Gen 2 Computer--I think it's the greatest thing since sliced bread---but you might consider me to be somewhat influenced, since I built it--
Ron Rich

Its routine to resolder the pins in the black & gray boxes . I have done it in every one . I have repaired a few of them by replacing bad transistors .

I have tested the voltages on this STD3 and they are normal cold or warm . Still takes 5 minutes at cold turn on .

Hi Ken,
I sat for days/weeks re-working both black and gray boxes--it is NOT "routine", for me to "solder the pins"--And I would advise anyone not to set a soldering iron onto the boards, unless you know how to, and have taken proper "static" precautions. In fact, if you don't know the proper procedures, you should not even attempt to open one of these as you will degrade the (NLA),LSI.
It's my guess that the problem in this phonograph is mechanism related to the read-out, or trip circuits--like a dirty/poorly adjusted detent switch, and or, the clutch shifting lever switch (2M-1)--- Ron Rich

Well maybe another description of this . The machine is in a regular heated room and turned off . If you just turn it on and dont touch it and come back in 5 minutes it works fine .

As for the ''boxes'' again , when i open them the solder on some of the connector pins have rings in the solder and some of them are loose in the solder . This is typical of all circuit boards with the same connector pins in a jukebox .
I have cleared up a number of strange symptoms in this age of jukebox by pulling every board and resoldering the pins . I am suprized you have never had this type of problem .

Ken,
I really don't have any more ideas on the STD --try "freeze mist" on it ??
Yes--I have seen cold solder ( or "dry solder") joints on equipment before, but Seeburg's wave solder machine used for the DTP/DRD's was excellent. I fixed two DTP's and one DRD in the last two days and looked at every solder joint--all were still perfect-?? Ron Rich

Thanks for the help anyways . I suspect its a resistor or transistor in the select/power supply box somewhere drifting .

Ken,
I just had a brain poof--which power supply board is installed in that phonograph ?
Ron Rich