Operational Flow Chart - Pioneer CRT3557 Service Manual

5

7.3 OPERATIONAL FLOW CHART

Power ON
VCC = 5V
Pin 16, 62
bsens
Pin 19
bsens = L (B.UP ON)
asens
Pin 20
asens = L (ACC ON)
dsens
Pin 18
dsens = L (DETACH ON)
ASENBO←H
Pin 40
Starts
communication
with Grille
microcomputer.
SWVDD←H
Pin 7
Source keys
operative
Source ON
SYSPW←H
Pin 48
Completes power-on operation.
(After that, proceed to each source operation)
5
6
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-P3800MP/XU/UC
6
7
7
8
A
B
C
D
E
F
65
8