Diagnosis; Operational Flowchart - Pioneer RS-P99/EW5 Service Manual

1

5. DIAGNOSIS

5.1 OPERATIONAL FLOWCHART

A
-SYSTEM RESET
Herdware reset release
Test program mode
Pin39 = Low
B
Pin39 = High
No
Unit check program start
C
DSP initialization failure
D
DSP error
PW lamp on and off
E
DIT reset
Pin47 = L
F
14
1
2
Initialization of reset release
Hi
Low
Acc:Pin15,Bup:Pin16
Pin16:Low
Yes
and
Pin15:Low
Normal
Bus communication
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
RS-P99/EW5
2
3
1
Bup,Acc check
Yes
Main loop
Abnormalities
OFF
DSPPW off (Pin40:L)
Mute on (Pin42:H)
Power on commond
DSPPW on (Pin40:H)
Error
DSP initialization
failure
PLD,DSP initialization
About 3 seconds
Mute off (Pin42:L)
Pin16:Low and Pin15:Low
3
4
Microcomputer dispatch stop
Power saving mode
Pin16:Low
and
Pin15:Low
OFF
No
4