Akai AM-A70 speaker relay fires in and out

I'm looking at fixing my Akai Am-A70, problem is the relay keeps going on on off randomly,

Power supply voltages seem to line up with the schematic

+/- 54vdc
+/- 16vdc
+ 12vdc

Offset at emitters on one channel under 10mv the other 100mv, no adjustments that I can see

Where to start from here?
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