Schematic Needed on older DH-500 (PC-9A)

I have an older Hafler DH-500 with a PC-9A power board instead of the PC-9C that I have found on the online manuals. Does anyone have the earlier manual or the schematics? The board is in pretty good shape so I think I can read all the resistor codes, but the diodes are all most all dead and I want to be careful and sure.

I did notice that Fantasia audio provides the schematic (for both the PC-9c and PC-9a) with the upgrade kit for the PC-9 on ebay, but since I probably have the replacement parts in stock, I hesitated to buy it.

Thanks in advance!!