I was not able to find a schematic for this board.
I was, however, able to identify most of the major components and am posting them here in case it helps someone else:
The main microcontroller: MC68HC705C9A by NXP
The serial eeprom: AT24C type from Atmel
LED driver array: MC1413 by ON Semiconductor
Various triacs on board: MAC97 by ON Semiconductor, and BTB10 by ST Micro
Zener diodes: 1N4740 from Vishay
There is a small IC on the backside that I could not identify and many 3 terminal devices that look like surface mount transistors. These components are covered with some epoxy or lamination that makes their part numbers unreadable.