Operational Flow Chart - Pioneer RS-A9/EW Service Manual

1

7.3 OPERATIONAL FLOW CHART

-SYSTEM RESET
A
Herdware reset release
Test program mode
Pin39=Low
Pin39=High
No
B
Unit check program start
C
DSP initialization failure
D
DSP error
PW lamp on and off
E
DIT reset
Pin47=L
F
124
1
2
Initialization of reset release
Hi
Low
Pin16:Low
Yes
Pin15:Low
Normal
System power on
ON
ON
DSPPW on (Pin40:H)
DSP Initialization OK
Normal
Mute OFF(Pin42:L)
DSP error
Pin51:H
No
Pin48=H
Un lock
Pin48:H?
No
Yes
Bup or Acc off
1
2
3
Bup,Acc check
Acc:Pin15,Bup:Pin16
and
Main loop
Abnormalities
Bus communication
OFF
DSPPW on (Pin40:H)
Error
DSP initialization
failure
PLD,DSP initialization
Pin16:Low and Pin15:Low
RS-A9/EW
3
4
1
Microcomputer dispatch stop
Power saving mode
Pin16:Low
and
Yes
Pin15:Low
OFF
DSPPW off (Pin40:L)
Mute on (Pin42:H)
No
Power on commond
About 3 seconds
Mute off (Pin42:L)
4