Operational Flow Chart - Pioneer DEH-1900R/XU/EW5 Service Manual

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7.3 OPERATIONAL FLOW CHART

A
Power ON
VDD
Pin 8
bsens
B
Pin 36
bsens = L
asens
Pin 35
asens = L
C
SWVDD←H
Pin 1
Source keys
operative
D
Source ON
SYSPW←H
Pin 15
E
Completes power-on operation.(After that, proceed to each source operation.)
F
60
1
2
Starts communication with Grille microcomputer.
300 ms
300 ms
In case of the above signal, the communication
with Grille microcomputer may fail.
If the time interval is not 300 msec, the oscillator
may be defective.
DEH-1900R/XU/EW5
2
3
3
4
4