Sony D-E990 Service Manual page 15

Pin No. Pin Name
39 HOLD
40 EX BATT
41 XSPDOE
42 XOE
43 XLAT
44 XSOE
45 DRVLT
46 XPOWLT
47 XDOUTON
48 XAPC OFF
49 NC
50 to 64 SEG14 to SEG0
65 to 68 COM3 to COM1
69 to 71 V3 to V1
72, 73 C1, C0
74 STOP
75 TEST
76 XHPSW
77 XLIGHT
78 RESET
79 XIN
80 XOUT
I/O
I HOLD switch (S804) input terminal
I External battery detection signal input terminal
O Control signal output to the spindle motor driver (IC402)
O Optical pick-up power ON/OFF control signal output terminal "L": ON
O Serial data latch pulse signal output to the CXD3027R (IC601)
O Serial data output enable signal output terminal
O Latch signal output to the spindle motor driver (IC402)
O Latch signal output to the power control (IC401)
O Digital output LED control signal output terminal "L": ON
O APC mute signal output terminal "L": mute
— Not used (open)
O Segment drive signal output to the liquid crystal display Not used (open)
O Common drive signal output to the liquid crystal display Not used (open)
O Bias signal output to the liquid crystal display driver Not used
O Capacitor connected terminal for the liquid crystal display driver voltage-up
O VCD control stop signal output terminal Not used (Fixed at "L")
I Test terminal for IC (Fixed at "L")
O ON/OFF control signal output to the headphone amplifier (IC351)
O LCD back light control signal output to the liquid crystal display Not used (Fixed at "L")
System reset signal input from the power control (IC401) "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
I System clock input terminal
O System clock input terminal Not used (open)
Description
"L": hold ON, "H": hold OFF
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