Sony HCD-RX80, Service Manual, Page: 60 / 90

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Pin No. Pin Name I/O Function
88 EQ-H/N O Equalizer H/N select output
89 BIAS O Bias ON/OFF signal output
90 REC-MUTE O REC mute ON/OFF selection output
91 NR-ON/OFF O NR ON/OFF signal output
92 R/P-PASS O REC/PB/PASS selection output
93 TC-MUTE O TC mute ON/OFF selection output
94 A-PLAY-SW I Deck A play detect
95 B-PLAY-SW I Deck B play detect
96 RELAY O REC/PB head selection output for IC602
97 A-HALF I Deck A cassette detect
98 POWER O POWER ON/OFF signal output
99 SW-F-CON O Super woofer mode signal output (Not used)
100 STK-MUTE O Power amp ON/OFF signal output