The parts-placement diagram in the Thomas book shows the ghostly-gray foil traces. Also the board number, but not quite clearly enough to make out. It's a mirror image of "EPT36001(glob)". It's on the board's edge just forward from the speaker amp chip.
It's definitely one or more revisions older than the "-14" versions sold from the mid-90s to the mid-2000s.
73
It's definitely one or more revisions older than the "-14" versions sold from the mid-90s to the mid-2000s.
73