Yes, stamina indeed is needed to remove a multi-pin component like a pot or relay from a PCB. I've done it w/a good size "solder blob" moved around the pins w/a small flat blade screwdriver prying edges. But this is not something one has fun doing. Easy to destroy the part & damage the PCB/contacts.
But this is a stumper for sure. The relay has a "must-latch" of 9V
. And you are measuring > 11V at its activation pins
. And this relay worked before.
I've not had relays go bad except perhaps for decades-old ones.
My only ideas:
1) Looking at pg#2 PIN CONFIGURATIONS (bottom view)
, we are *sure* you've got > 11VDC across pins #1 & #12 and its of correct polarity
(+ / -)?
2) And if so, we are sure the relay is not latching pins 4->5 & 9->8 when powered
& have checked that w/an ohmmeter?
If both these are the case then I'd think the relay must be bad. One way to hurt relays is heating their pins for a *very* long time - long enough for the internal wires attached to the pins to come loose. BUT the relay passes the coil ohm test (about 1028R). Although this was in-circuit measurement it appears to counter the loose wire idea.
Guess would then be relay is somehow stuck in open position... I'd be tempted to give it a short, sharp wack
Edit: If ordering, be sure you've a BC337-25 Q1P replacement around too