Sony HCD-C990 Service Manual - Page 105

HCD-C770/C990 • DVD BOARD IC902 PT3000 (CHANGER CONTROLLER (MOTOR, SWITCH) ) Pin No. 1 2 3 4 5 6 7 8 9 Pin Name VSS RESET CLK LAT P15 P14 P13 P12 P11 10 11 12 13 14 15 16 17, 18 19, 20 21, 22 23, 24 25 26 27 28 P10 P9 P8 LATCHO CLKO DO1 DI2 P7, P6 P5, P4 P3, P2 P1, P0 DO2 DI1 PULLUP VCC I/O Description - Ground terminal I Reset signal input from the system controller "L": reset 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 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 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 I Stocking detect switch input terminal "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) 105