Operational Flow Chart - Pioneer DEH-P450MP Service Manual

1

7.3 OPERATIONAL FLOW CHART

A
Power ON
VDD=5V
Pin 41
bsens
Pin 93
B
asens
Pin 92
dsens
Pin 90
C
ASENBO←H
Pin 71
CSENS
Pin 77
D
Starts
communication
with Grille
microcomputer.
swvdd←H
Pin 1
Source keys
operative
E
Source ON
SYSPW←H
Pin 21
F
Completes power-on operation.
(After that, proceed to each source operation)
70
1
2
bsens=L
asens=L
dsens=L
2V < CSENS < 3V
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-P450MP/XM/UC
2
3
< <
- CSENS 2V, 3V CSENS
= =
Last source returns.
CD loading functions are available.
Keys except for EJECT key are not available.
300ms
3
4
4