Sony HCD-C770 - Page 105

105
HCD-C770/C990
• DVD BOARD IC902 PT3000 (CHANGER CONTROLLER (MOTOR, SWITCH) )
Pin No. Pin Name I/O Description
1 VSS —
Ground terminal
2 RESET I
Reset signal input from the system controller “L”: reset
3 CLK I
Serial data transfer clock signal input from the system controller
4 LAT I
Serial data latch pulse signal input from the system controller
5 P15 I
Disc insert (8/12cm) detect switch input terminal “L”: disc insert
6 P14 I
Disc insert (12cm) detect switch input terminal “L”: disc insert Not used
7 P13 I
Disc in (8/12cm) detect switch input terminal “L”: play position
8 P12 I
Disc in (12cm) detect switch input terminal “L”: play position
9 P11 I
Stocker in/out detect switch input terminal “L”: in the midst disc is moving between play
position and stocker except the moment disc in/out from stocker
10 P10 I
Disc position detect switch input terminal
“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
11 P9 I
Disc out detect switch input terminal “H”: disc out from play position
12 P8 I
Stocking detect switch input terminal
“H”: in the midst disc is moving between play position and stocker
13 LATCHO O
Serial data latch pulse signal output to the changer controller (rotary encoder)
14 CLKO O
Serial data transfer clock signal output to the changer controller (rotary encoder)
15 DO1 O
Serial data output to the changer controller (rotary encoder)
16 DI2 I
Serial data input terminal Not used
17, 18 P7, P6 O
Not used
19, 20 P5, P4 O
Elevator up/down motor drive control signal output
21, 22 P3, P2 O
Rollar motor drive control signal output
23, 24 P1, P0 O
Loading motor drive control signal output
25 DO2 O
Serial data output to the changer controller (rotary encoder)
26 DI1 I
Serial data input from the system controller
27 PULLUP —
Connected to power supply (+5V)
28 VCC —
Power supply terminal (+5V)