Sony HCD-MD1EX - System Service Manual page 73

Pin No. Pin Name
87 CE
88 ST-MUTE
89 FM/AM SELECT
90 SIRCS
91 —
92 —
93 FAN SPEED
94 FAN STOP
95 —
96 MD1
97 to 99 —
100 BACKUP
I/O
O PLL serial chip enable signal output to the FM/AM tuner unit
O Tuner muting on/off control signal output to the FM/AM tuner unit "L": muting on
O FM/AM selection signal output terminal Not used (open)
I Sircs signal input from the remote control receiver (IC902)
O Not used (open)
I Not used (fixed at "L")
O Fan motor speed control signal output terminal Not used (open)
O Fan motor on/off control signal output terminal Not used (open)
O Not used (open)
I Setting terminal for the CPU operational mode (fixed at "H" in this set)
I Not used (fixed at "L")
System reset signal input from the reset signal generator (IC708) "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
Function
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