Sony XR-4890 Service Manual page 22

Pin No. Pin Name
50 NCO
51 AMSON
52 NROUT
53 MTLON
54 TAPMUT
55 DOLON
56 AMSIN
57 to 75 NCO
76 ST
77 SD_IN
78 REIN 1
79 REIN 0
80 AD ON
81 PW SEL
82 ILLON
83 REL
84 POS3
85 POS2
86 POS0
87 POS1
88 LM LOD
89 LM EJ
90 TAPON
91 CM ON
92 PW ON
93 FM ON
94 TUNON
95 DAVSS
96 to 99 NCO
100 DAVDD
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I/O
O Not used
O "L" is output in AMS mode
O FOR/REV control output
I/O Metal control input/output
O Tape mute control output
I/O Dolby control input/output
I Input to detect existence of song during AMS mode
O Not used
I/O Combination stereo input and monaural output
I SIGNAL DETECTOR input terminal
I
Rotary encoder input terminal
I
O Power supply control output of AD conversion
I Power selection initialise
O Illumination power supply control output
I Input to detect rotation of reel table
I
I
Tape position signal detection input
I
I
O Loading motor control output (to a direction of loading)
O Loading motor control output (to a direction of ejection)
TAPE power supply control output
O
When 'on' is output, "H" is output, otherwise when 'off' is output, "L" is output.
O Capstan motor control signal output terminal of TAPE
O System power supply control output
O FM power supply control output terminal
O TUNER power supply control output terminal
– Ground
O Not used
– Not used (Power supply for DA converter)
– 28 –
Function