Sony XR-C7220, Руководство по обслуживанию

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Pin No. Pin Name I/O Function
76 KEYACK
I
Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
and eject keys in the power off status On at input of “H”
77 BU-IN
I
Battery detect signal input from the SONY bus interface (IC701) and battery detect circuit
“L” is input at low voltage
78 ILL IN
I
Auto dimmer control illumination line detection signal input terminal
“L” is input at dimmer detection Fixed at “L” in this set
79
TEL-ATT I Telephone muting signal input terminal At input of “H”, the signal is attenuated by –20 dB
80 NOSESW I
Front panel block remove/attach detection switch (S504) input terminal
“L”: front panel is attached
81 ACC IN
I Accessory detect signal input terminal “L”: accessory on
82 to 85 NCO O
Not used (open)
86 HSTX I
Hardware standby input terminal “L”: hardware standby mode Reset signal input in this set
87 MD2 I
Setting terminal for the CPU operational mode (fixed at “L” in this set)
88 MD1 I
Setting terminal for the CPU operational mode (fixed at “H” in this set)
89 MD0 I
Setting terminal for the CPU operational mode (fixed at “H” in this set)
90 RESET I
System reset signal input from the reset signal generator (IC652) and reset switch (S503)
“L”: reset “L” is input for several 100 msec after power on, then it changes to “H”
91 VSS —
Ground terminal
92 X0
I Main system clock input terminal (3.68 MHz)
93 X1
O Main system clock output terminal (3.68 MHz)
94 VCC —
Power supply terminal (+5V)
95 to 99 NCO O
Not used (open)
100 9K/10K I
Frequency select switch (S502) input terminal
“L”: AM 9 kHz/FM 50 kHz step, “H”: AM 10 kHz/FM 200 kHz step
Used for the XR-C7300/C7300W only
101 NCO O
Not used (open)
102 NCO I
Not used (open)
103 AMSIN I
Whether a music is present or not from CXA2510AQ (IC301) is detected at auto music sensor
“L”: music is present, “H”: music is not present
104 REEL I
Rotation detect signal input from supply reel sensor and take-up reel sensor on the deck
mechanism
105 POS0 I
106 POS1 I
107 POS2 I
108 POS3 I
109 LM-EJ O
Motor drive signal output to the loading/tape operation motor drive (IC361) “H” active
(For the eject direction and reverse side operation) *1
110 LM-LOD O
Motor drive signal output to the loading/tape operation motor drive (IC361) “H” active
(For the loading direction and forward side operation) *1
111 CM-ON O Capstan/reel motor (M901) drive signal output terminal “H”: motor on
112 TAPEON O Tape system power supply on/off control signal output terminal “H”: tape on
113 N-ROUT O
Forward/reverse direction control signal output to the CXA2510AQ (IC301)
“L”: forward direction, “H”: reverse direction
114 AMSON O
Tape auto music sensor control signal output to the CXA2510AQ (IC301)
“L” is output to lower the gain for audio level at FF/REW mode
115 MTLON I/O
METAL control in/out terminal
At initial mode: auto/manual mode selection input of METAL function (manual at “L” input)
At manual mode: METAL on/off control signal output to the CXA2510AQ (IC301)
(METAL on at “H” output)
At auto mode: input at MTLIN (pin
`⁄‚¤
)
Tape position (EJECT/FF/REW/
REV/FWD mode) detect input from
the tape operation switch on the deck
mechanism POS0: “L”: EJECT mode, “H”: others mode
POS1: “L”: FF and FWD mode, “H”: others mode
POS2: “L”: REW mode, “H”: others mode
POS3: “L”: REV and EJECT mode, “H”: others mode