Sony WX-7700MDX Service Manual page 73

Pin No. Pin Name
72 NCO
73
X1A
74
X0A
75 FP PULSE
76 DSPREDY
77 MD ON
78 BU IN
79 KEYACK
80 AD ON
81 ACC IN
82 SIRCS RST
83 POWON
84 TESTIN
85 RAMBU
86 HSTX
87 to 89 MD2 to MD0
90 RSTX
91 VSS
92 X0
93 X1
94 VCC
95 ILLIN
96 IDET
97 MOT–
98 MOT+
99 CLOSE SW
100 OPEN SW
101 BOOT
102 to 104 NCO
105 SUBP ON
I/O
O
Not used
O Sub system clock output terminal (32.768 kHz)
I Sub system clock input terminal (32.768 kHz)
Detection input terminal from the front panel open/close detect and open/close angle detect sensor
I
"L" is input when the front panel is full opened
Transfer enable signal input for micro controller interface from the CXD2727Q
I
"L": transfer prohibition
Power on/off signal input of the MD mechanism deck section from the MD mechanism controller
I
"H": power on
Back-up power supply detect signal input from the SONY bus interface IC
I
"L" is input at low voltage
Input of acknowledge detect signal for the key entry Acknowledge signal is input to accept
I
function and eject keys in the power off status On at input of "H"
A/D converter power control signal output terminal
O When the KEYACK (pin ul) that controls reference voltage power for key A/D conversion input
is active, "L" is output from this terminal to enable the input
I Accessory power detection signal input terminal "L": accessory power on
O System reset signal output to the SIRCS controller "L": reset
O System power on/off control signal output terminal "H": power on
I Setting terminal for the test mode "L": test mode, normally fixed at "H"
Internal RAM reset detection signal input from the RN5VD33AA
I Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset
Hardware standby signal input terminal "L": hardware standby mode
I
Reset signal input in this set
I Setting terminal for the CPU operational mode
System reset signal input from the reset signal generator and reset switch "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
— Ground terminal
I Main system clock input terminal (3.8684 MHz)
O Main system clock output terminal (3.8684 MHz)
—
Power supply terminal (+5V)
Auto dimmer control illumination line detection signal input terminal
I
"L" is input at dimmer detection
Detection signal input from the front panel open/close motor over-load detection circuit
I
"L": over current
Front panel open/close motor drive signal (panel close direction) output to the BA6288FS
O
"H" active *2
Front panel open/close motor drive signal (panel open direction) output to the BA6288FS
O
"H" active *2
I
Detection input from the front panel close detect switch
I
Detection input from the front panel open detect switch
Detection signal outnput at the flash memory writing mode to the display controller
O
"L" is input when writing mode
O Not used
O Power on/off control signal output for the sub panel illumination LED "H": power on
Description
"L": front panel close
"L": front panel full open
WX-7700MDX
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