Sony D-E880 Service Manual page 15

Pin No. Pin Name
37 XNTSC I
38 AVLS
39 HOLD
40 EX BATT
41 DRVRST
42 XOE
43 XLAT
44 XSOE
45 DRVLT
46 XPOWLT
47 XDOUTON
48 XAPC OFF
49 XVRST
50 to 64 SEG14 to SEG0
65 to 68 COM3 to COM0
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 Not used (fixed at "H")
AVLS (Automatic Volume Limiter System) switch (S803) input terminal
I
"L": normal mode, "H": limit mode
I HOLD switch (S804) input terminal
I External battery detection signal input terminal "H": external battery
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 to the CXD3027R (IC601)
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 on the switch unit
O Common drive signal output to the liquid crystal display on the switch unit
O Bias signal output to the liquid crystal display driver
O Capacitor connected terminal for the liquid crystal display driver voltage-up (for bias)
I Not used (fixed at "L")
I Test terminal for internal connection (normally: fixed at "L")
O ON/OFF control signal output to the headphone amp (IC351) "L": ON
O LCD back light control signal output to the liquid crystal display on the switch unit
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 from the CXD3027R (IC601) (4.2336MHz: 1/4 dividing of 16.9MHz)
O System clock output terminal Not used (open)
Description
"L": hold ON, "H": hold OFF
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