Sony XR-C7220 Service Manual page 29

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Pin No. Pin Name
76 KEYACK
77 BU-IN
78 ILL IN
79
TEL-ATT
80 NOSESW
81 ACC IN
82 to 85 NCO
86 HSTX
87 MD2
88 MD1
89 MD0
90 RESET
91 VSS
92 X0
93 X1
94 VCC
95 to 99 NCO
TE
L 13942296513
100 9K/10K
101 NCO
102 NCO
103 AMSIN
104 REEL
105 POS0
106 POS1
107 POS2
108 POS3
109 LM-EJ
110 LM-LOD
111 CM-ON
112 TAPEON
113 N-ROUT
114 AMSON
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115 MTLON
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I/O
Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
I
and eject keys in the power off status On at input of "H"
Battery detect signal input from the SONY bus interface (IC701) and battery detect circuit
I
"L" is input at low voltage
Auto dimmer control illumination line detection signal input terminal
I
"L" is input at dimmer detection Fixed at "L" in this set
I Telephone muting signal input terminal At input of "H", the signal is attenuated by –20 dB
Front panel block remove/attach detection switch (S504) input terminal
I
"L": front panel is attached
I Accessory detect signal input terminal "L": accessory on
O
Not used (open)
I Hardware standby input terminal "L": hardware standby mode Reset signal input in this set
I
Setting terminal for the CPU operational mode (fixed at "L" in this set)
I
Setting terminal for the CPU operational mode (fixed at "H" in this set)
I
Setting terminal for the CPU operational mode (fixed at "H" in this set)
System reset signal input from the reset signal generator (IC652) and reset switch (S503)
I
"L": reset "L" is input for several 100 msec after power on, then it changes to "H"
— Ground terminal
I Main system clock input terminal (3.68 MHz)
O Main system clock output terminal (3.68 MHz)
—
Power supply terminal (+5V)
O Not used (open)
Frequency select switch (S502) input terminal
I
"L": AM 9 kHz/FM 50 kHz step, "H": AM 10 kHz/FM 200 kHz step
Used for the XR-C7300/C7300W only
O
Not used (open)
I
Not used (open)
Whether a music is present or not from CXA2510AQ (IC301) is detected at auto music sensor
I
"L": music is present, "H": music is not present
Rotation detect signal input from supply reel sensor and take-up reel sensor on the deck
I
mechanism
I
Tape position (EJECT/FF/REW/
I
REV/FWD mode) detect input from
the tape operation switch on the deck
I
mechanism
I
Motor drive signal output to the loading/tape operation motor drive (IC361) "H" active
O
(For the eject direction and reverse side operation) *1
Motor drive signal output to the loading/tape operation motor drive (IC361) "H" active
O
(For the loading direction and forward side operation) *1
O
Capstan/reel motor (M901) drive signal output terminal "H": motor on
O
Tape system power supply on/off control signal output terminal "H": tape on
Forward/reverse direction control signal output to the CXA2510AQ (IC301)
O
"L": forward direction, "H": reverse direction
Tape auto music sensor control signal output to the CXA2510AQ (IC301)
O
"L" is output to lower the gain for audio level at FF/REW mode
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METAL control in/out terminal
y
At initial mode: auto/manual mode selection input of METAL function (manual at "L" input)
i
At manual mode: METAL on/off control signal output to the CXA2510AQ (IC301)
I/O
(METAL on at "H" output)
At auto mode: input at MTLIN (pin `⁄‚¤)
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Function
Q Q
3 6 7 1 3 1 5
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
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