OP
OP
Managed to get the main lamp driver board working 100%, 3 new SCR's and solder reflow the header pins has sorted out all the issues.
Also fixed my spare board - the IC's are socketed, and one of them had a bent pin! Straightened it and inserted it correctly and all is good.
However, the auxilliary lamp driver board has a big issue. It wont light any of the "Chamber Lights" - But it does light all the others - although these seem to be on too much? Looking at the schematic I can see the 4 chamber lamps are controlled across the 2 chips (one on each 1/2 of each chip), and they are all controlled off output number 3 - suggests the problem is therefore most likely to be the driving flip flop ic. - I guess its not flipping the output. Part MC14013B
I'll get one of those ordered.
Now, finally onto trying to get the playfield to sit properly. It looks like the left hand hinge bracket in the cabinet is too far forward, or the hinge on the pf is too far back. Both don't look like they have been messed with, so not sure why it is out so far. I then thought the cab might be skewed, but its square. It could be a factory error and maybe has always been a real tight fit. Anyhow I'll try moving the pf hinge forward 1/4" and see if that sorts it.
Also fixed my spare board - the IC's are socketed, and one of them had a bent pin! Straightened it and inserted it correctly and all is good.
However, the auxilliary lamp driver board has a big issue. It wont light any of the "Chamber Lights" - But it does light all the others - although these seem to be on too much? Looking at the schematic I can see the 4 chamber lamps are controlled across the 2 chips (one on each 1/2 of each chip), and they are all controlled off output number 3 - suggests the problem is therefore most likely to be the driving flip flop ic. - I guess its not flipping the output. Part MC14013B
I'll get one of those ordered.
Now, finally onto trying to get the playfield to sit properly. It looks like the left hand hinge bracket in the cabinet is too far forward, or the hinge on the pf is too far back. Both don't look like they have been messed with, so not sure why it is out so far. I then thought the cab might be skewed, but its square. It could be a factory error and maybe has always been a real tight fit. Anyhow I'll try moving the pf hinge forward 1/4" and see if that sorts it.
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