Yamaha GX-700 Service Manual page 23

ROTARY TRAY initialization operation
Start
10sec timer start
ROTARY MOTOR forward rotate
NO
POSITION SW
OFF ?
YES
Timer 20ms
NO
POSITION SW
OFF ?
YES
POSITION SW
NO
ON ?
YES
Timer 20ms
POSITION SW NO
ON ?
YES
DISC NO. count
STOP SW
NO
OFF ?
YES
DISC
NO
NO. 3 ?
YES
ROTARY MOTOR retard
DISC NO. clear
STOP SW
NO
ON ?
YES
ROTARY MOTOR 32ms back pluse
ROTARY MOTOR STOP
STOP SW NO
ON ?
Timer 60ms
YES
STOP SW
ON ?
Overrun count clear
END
NO 10sec timer
time up ?
YES
ROTARY MOTOR STOP
ERROR
10sec timer
NO
time up ?
YES
NO
POSITION SW
OFF ?
YES
10sec timer
time up ?
YES
Overrun count
NO Overrun
count = 3 ?
YES
YES
ERROR
NO
NO
GX-700/GX-700VCD
22