Operational Flow Chart - Pioneer DEH-P5850MP/XN/ES Service Manual

1

7.3 OPERATIONAL FLOW CHART

Power ON
A
VCC = 5 V
Pin 14
bsens
Pin 73
B
asens
Pin 72
dsens
Pin 39
C
ASENBO←H
Pin 80
CSENS
Pin 91
Starts
communication
with Grille
microcomputer.
D
SWVDD←H
Pin 38
Source keys
operative
E
Source ON
SYSPW←H
Pin 1
Completes power-on operation.
(After that, proceed to each source operation)
F
68
1
2
bsens = L
asens = L
dsens = L
2 V < CSENS < 3 V
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-P5850MP/XN/ES
2
3
- 2 V < CSENS < 3 V
Last source returns.
CD loading functions are available.
Keys except for EJECT key are not available.
300 ms
3
4
4