## Board `PH00524-2`

The board controlling the vacuum valves does not show up in the schematics
delivered with the SEM.  To us, it seems like the functionality was updated by
merging a few of the boards from the schematics into a single board with even
more smartness.

`PH00524-2` contains connectors named `FK*`, `FM*`, and `FL*`, leading to the
assumption that the boards `FK`, `FM`, and `FL` have been integrated into it.
So far, the connectors seem to match up with the ones shown in the SEM schematics.

There is also a Z80 based system + an EEPROM on the board.

## Front Side
![Image of PH00524-2](./ph00524-2.jpg)

## Back Side
![Image of the back side of PH00524-2](./ph00524-2-back.jpg)
