Shopping out a CFTBL- got to the bowl # 86 lamps. Noticed one socket is missing from board. Also one socket does not light up. Checked continuity on pins through traces to all bulbs and they check fine. Measured voltages at sockets and they are measuring 7.3 except for the socket that wont light which is 4.6 as well as the board traces where the socket is missing. Could it be the voltage is insufficient to light the bulb and the reason that this socket as well as the missing socket are reading 4.6 points to something wiring wise and not with the bowl light pcb itself? Just trying to figure out where to look. I assume I can replace the # 86 socket on this board?

Thanks will try. I was testing in all lamps test while changing bulbs. Any ideas where I can find a lamp socket for the missing one?

Thanks so much UFO- you're right the magical socket does come to life. Now if I can just locate a socket to solder onto the pads thats missing. Been looking around different electronic companies online. Not sure what to look for. I think the # 86 bulb goes into a T 1 3/4 socket for pcb. Hard to find a right angled one

I have about 16 of these sockets now gunstar which i am going to salvage off old TZ clock boards. How many do you need?

Well I spoke too soon. Found exact replacement sockets and replaced my missing one. Ran ramp light test and only 6 bowl lights work. The two that are out are on same on trace. Continuity shows good wiring between sockets and the connect with the header pins. Dmm shows much higher voltage on this pin on wire connector.
Also noticed similar issue on main chase ramp. Smaller length board at end of ramp has 2 sockets out which are connected to each other.
Could this be a problem with the chase board? What should be testing

Thanks everyone

Will check. Doubt it's connectors on the board. As o said it's getting voltage. It looks like it's getting too much when you measure the connectors at the lamps themselves. Testing transistors and triacs is not something i have done before. Is there somewhere I can read how?

UFO , since you have rebulit the board, perhaps you can lend me some insight as to what to check on the board . I am happy to order your board if I know that the issue

Also asmig, I assume I just remove the board and check on the bench since its resistance we are measuring

The lower part of the curly ramp has two bulbs out which are on the same pin. It is identical to what is going on with the bowl. As i said earlier, when I put the dmm on the pins of the connectors all bulbs read fairly similarlypine but the pin that is controlling the bulbs that are out is about 4 times as high in reading

Okay this morning i explored the board. Reseated the connectors and boom everything works. Doesnt explain the voltage issue but at least i know the issue is at the board. Will follow and reflow header pins if needed. Must be a temper-mental little thing