70
MJ-L5, SP-L5
Power on check
Power can not on by MD key operation if DEMO mode
information from the CD receiver is not received.
Did the power turn on by the CD receiver, and receive
power on of the system bus communication.
Was EJECT key pressed ?
Check the trigger that is
turned the power on, and
issue the system power on
request of system bus
command.
Was PLAY key pressed ?
Was a disc inserted ?
Transfer the system power on request
command to the CD receiver.
Power on for mechanism (pin 75)
Digital power on for mechanism (pin 76)
Power on for system (pin 77)
Mechanism reset on (pin 21)
Release power down detection of mechanism (pin 24)
Power on process is not done until system power on
from the CD receiver is received.
(It keeps waiting for system power on information.)
System power
on request
Power on
process
MDRST
→
1
Turn on the power of
the periphery circuit.
P.S.VM+5
→
1
P.S.VMD+5
→
0
P.S.+5
→
1
MDRST
→
0
PDOWN
→
1
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Is DEMO mode ?
System power on ?
No
EJECT KEY ?
No
No
No
No
PLAY KEY ?
System power on ?
Wait for 500msec.?
Disc insertion ?
Power on end
No
Wait for 300msec.?
No
Wait for mech.
mode stop?
• Power on sequence of MD microcomputer
Wait until the power
supply of mechanism
system becomes
stable.
Wait for the completion of
the initialize process of
mechanism controller.
Start the communication with
mechanism controller.
Waiting time of information
reception from mechanism
controller.
Release the
mechanism reset
signal (pin 21).
