Holy Smokes! I mean, acrid, copious amounts of smoke! Who knew that a tiny little SCR could make that big of a stink!
SCR # Q52 on the Lamp Driver board burned up when I started the machine last night.
Am I correct in suspecting that a short in one of the lamp sockets has caused this?
According to the schematic, Q52 is connected to two plugs:
J2 pin 5 (connected to the light under the K insert)
J3 pin 13 - but the schematic doesn't say where this wire goes. I will try and trace it out today.
In the meantime, are there any other reasons why this tiny little SCR would blow?
EDIT: OK, I traced the wired and it goes back to the rectifier board (J3 pin 3). This is labelled as a LDA board return. It's connected to pins 1&2 (GI return) and pin 4 (another LDA board return). So this remains a mystery...
I guess I will just replace the SCR and just give each socket a thorough check before I power on again. I hope 5064's are the same as 5060's cause I don't seem to have any 5060's...