Sony MDX-C8970 Service Manual page 57

Pin No. Pin Name
74 X0A
75 NCO
76 KEYACK
77 BU-IN
78 SP LATCH
79 DSP REDY
80 TEST
81 EMPH
82 WAKE UP
83
TEL-MUTE
84
TU-ON
85 ILL IN
86 HSTX
87 MD2
88 MD0
89 MD1
90 RESET
91 VSS
92 X0
93 X1
94 VCC
95 DOOR-IND
96 DSP ON
97 NCO
98 AMP STBY
99 to 106 NCO
107 AD-ON
108 NCO
109 NOSE-SW
110 CSV REQ
111 CSV CE
112 CSV RST
113 NCO
114
FM-ON
115 DOOR-SW
116 NCO
I/O
I
Sub system clock input terminal (32.768 kHz)
O Not used (open)
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 (IC271) and battery detect circuit
I
"L" is input at low voltage
Serial data latch pulse output for spectrum analyzer section to the liquid display drive controller
O
(IC701)
Transfer enable signal output from the liquid crystal display drive controller (IC701)
I
"L": transfer prohibition, "H": transfer permission
I Setting terminal for the test mode "L": test mode, Normally: fixed at "H"
O Emphasis control signal output to the MD mechanism controller (IC501)
O DC/DC converter power supply on/off control signal output terminal Not used (open)
I Telephone muting signal input terminal At input of "L", the signal is attenuated by –20 dB
O Tuner system power supply on/off control signal output "H": tuner power on
Auto dimmer control illumination line detection signal input terminal
I
"L" is input at dimmer detection
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 (IC506) and reset switch (S703)
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)
LED drive signal output of the illumination LED (LED706) "H": LED on
O
"H" is output to turn on LED when front panel is opened
O Power supply on/off control signal output for the CXD2727Q (IC300) "H": DSP on
O
Not used (open)
Standby on/off control signal output to the power amplifier (IC481)
O
"L": standby mode, "H": amp on
O
Not used (open)
A/D converter power control signal output terminal
When the KEYACK (pin &§ that controls reference voltage power for key A/D conversion input is
O
active, "L" is output from this terminal to enable the input
O
Not used (open)
Front panel block remove/attach detection signal input terminal
I
"L": front panel is attached
I
Serial data transfer request input from the CSV (IC801)
O
Chip enable signal output to the CSV (IC801) "H": active
O
Reset signal output to the CSV (IC801) and flash memory (IC805) "L": reset
O
Not used (open)
FM system power supply on/off control signal output
O
"L": AM power on, "H": FM power on
I
Front panel open/close detection signal input "L" is input when the front panel is closed
O
Not used (open)
Description
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