Operation Flow Chart - Pioneer DEH-P440 Service Manual

5

7.3 OPERATION FLOW CHART

Power ON
VDD=5V
19pin
bsens
93pin
bsens=L
asens
92pin
asens=L
dsens
2pin
dsens=L
adpw←H
22pin
ASENBO←H
71pin
CSENS
77pin
2V<CSENS<4V
Starts
communication
with Grille
microcomputer.
SWVDD←H
23pin
Source keys
operative
Source ON
SYSPW←H
21pin
Completes power-on operation.
(After that, proceed to each source operation)
5
6
- 2V<CSENS<4V ,
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-P440/XN/UC
6
7
7
8
A
B
C
D
63
8