Sony HCD-C770 Service Manual page 103

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• DVD BOARD IC902 PT3000 (CHANGER CONTROLLER (MOTOR, SWITCH) )
Pin No. Pin Name
1 VSS
2 RESET
3 CLK
4 LAT
5 P15
6 P14
7 P13
8 P12
9 P11
10 P10
11 P9
12 P8
13 LATCHO
14 CLKO
15 DO1
16 DI2
17, 18 P7, P6
TE
L 13942296513
19, 20 P5, P4
21, 22 P3, P2
23, 24 P1, P0
25 DO2
26 DI1
27 PULLUP
28 VCC
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I/O
— Ground terminal
I
Reset signal input from the system controller
I
Serial data transfer clock signal input from the system controller
I
Serial data latch pulse signal input from the system controller
I Disc insert (8/12cm) detect switch input terminal "L": disc insert
I
Disc insert (12cm) detect switch input terminal "L": disc insert Not used
I
Disc in (8/12cm) detect switch input terminal "L": play position
I
Disc in (12cm) detect switch input terminal "L": play position
Stocker in/out detect switch input terminal "L": in the midst disc is moving between play
I
position and stocker except the moment disc in/out from stocker
Disc position detect switch input terminal
I
"L": disc is play position side in the midst disc is moving between play position and stocker,
"H": disc is stocker side in the midst disc is moving between play position and stocker
I Disc out detect switch input terminal "H": disc out from play position
Stocking detect switch input terminal
I
"H": in the midst disc is moving between play position and stocker
O
Serial data latch pulse signal output to the changer controller (rotary encoder)
O
Serial data transfer clock signal output to the changer controller (rotary encoder)
O
Serial data output to the changer controller (rotary encoder)
I
Serial data input terminal Not used
O Not used
O
Elevator up/down motor drive control signal output
O
Rollar motor drive control signal output
O
Loading motor drive control signal output
O Serial data output to the changer controller (rotary encoder)
I
Serial data input from the system controller
—
Connected to power supply (+5V)
—
Power supply terminal (+5V)
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2 9
8
Description
"L": reset
Q Q
3 6 7 1 3 1 5
co
.
HCD-C770/C990
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9
103