Sony XR-4880, Service Manual, Page: 24 / 35

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Pin No. Pin Name I/O Function
50 NCO O Not used
51 AMSON O “L” is output in AMS mode
52 N/R-OUT O FWD/REV control output
53 MTLON I/O Metal control input/output
54 TAPMUT O Tape mute control output
55 DOLON I/O Dolby control input/output
56 AMSIN I Input to detect existence of song during AMS mode
57 to 75 NCO O Not used
76 ST I/O Combination stereo input and monaural output
77 SD-IN I SIGNAL DETECTOR input terminal
78 REIN 1 I
79 REIN 0 I
80 AD ON O Power supply control output of AD conversion
81 PW SEL I Power selection initialise
82 ILLON O Illumination power supply control output
83 REL I Input to detect rotation of reel table
84 POS3 I
85 POS2 I
86 POS0 I
87 POS1 I
88 LM LOD O Loading motor control output (to a direction of loading)
89 LM EJ O Loading motor control output (to a direction of ejection)
TAPE power supply control output
When ‘on’ is output, “H” is output, otherwise when ‘off’ is output, “L” is output.
91 CM ON O Capstan motor control signal output terminal of TAPE
92 PW ON O System power supply control output
93 FM ON O FM power supply control output terminal
94 TUNON O TUNER power supply control output terminal
95 DAVSS – Ground
96 to 99 NCO O Not used
100 DAVDD – Not used (Power supply for DA converter)
Tape position signal detection input
Rotary encoder input terminal
90 TAPON O