Operational Flow Chart; Power On - Pioneer DEH-P730 Service Manual

7.3 OPERATIONAL FLOW CHART

Power ON

VCC=5V
Pin 16
bsens
Pin 73
bsens=L
asens
Pin 74
asens=L
dsens
Pin 41
dsens=L
ASENBO←H
Pin 82
csens
Pin 93
2V<CSENS<3V
Starts
communication
with Grille
microcomputer.
SWVDD←H
Pin 40
Source keys
operative
Source ON
SYSPW←H
Pin 23
Completes power-on operation.
(After that, proceed to each source operation)
<
- CSENS 2V , 3V CSENS
=
Source returns to the original one(before you open).
CD, MD and TAPE loading functions are available.
Keys except for EJECT key are not available.
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-P730,P7300
<
=
65