Operational Flow Chart - Pioneer DEH-2790MP/XN/ID Service Manual

5

7.3 OPERATIONAL FLOW CHART

Power ON
bsens
Pin 64
bsens=L
asens
Pin 63
asens=L
swvdd←L
Pin 21
Source keys
operative
Source ON
SYSPW←H
Pin 43
Completes power-on operation.(After that, proceed to each source operation.)
5
6
AVREF1, VDD, AVDD=5V
Pin 7, 68, 74, 75
Starts communication with Grille microcomputer.
300ms
300ms
In case of the above signal, the communication
with Grille microcomputer may fail.
If the time interval is not 300msec, the oscillator
may be defective.
DEH-2790MP/XN/ID
6
7
7
8
A
B
C
D
E
F
65
8