Sony XR-2800, Руководство по обслуживанию

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Pin No. Pin Name I/O Function
73 SYSRST O Reset signal output terminal “L”: reset Not used (open)
74 VREG O CPU regulator output terminal Connected to capacitor
75 GND — Ground terminal
76 X OUT O Main system clock output terminal (4.5 MHz)
77 X IN I Main system clock input terminal (4.5 MHz)
78 CE I CPU chip enable signal input (fixed at “H”)
79 VDD — Power supply terminal (+5V)
80 RESET I
System reset signal input from the reset signal generator circuit and reset switch (S901)
“L” is input for several 100 msec after power on, then it changes to “H”
*1 loading/tape operation motor control
MODE
TERMINAL
LM LOD (pin
8
) “L” “H” “L” “H”
LM EJ (pin
9
) “L” “L” “H” “H”
STOP
LOADING/
FORWARD
EJECT/
REVERSE
BRAKE