Operational Flow Chart - Pioneer FH-P4200MP/XU/UC Service Manual

5

7.3 OPERATIONAL FLOW CHART

Power ON
VDD=5V
Pin 14,60
bsens
Pin 73
bsens=L
asens
Pin 72
asens=L
ASENBO←H
Pin 17
Starts
communication
with Grille
microcomputer.
SWVDD←H
Pin 38
Source keys
operative
Source ON
SYSPW←H
Pin 1
Completes power-on operation.
(After that, proceed to each source operation)
5
6
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.
FH-P4200MP/XU/UC
6
7
7
8
A
B
C
D
E
F
81
8