very quick service and manual as described - would happily trade here again!
Text excerpt from page 14 (click to view)
IC DESCRIPTION-1/3 (CXA2523AR)-2/2
Pin No. 42 43 44 45 46 47 48 Pin Name COMPP ADDC OPO OPN RFO MORFI MORFO I/O I I/O O I O I O Description User comparator non-inverted input pin. Capacitor connection pin for ADIP amplifier on return circuit. Not used. Non-inverted input pin for user operational amplifier. RF amplifier output pin. Check point for eye pattern. Input pin where Groove RF signal is AC coupled. Output pin for Groove RF signal.