Operational Flow Chart - Pioneer DEH-P750MP Service Manual

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7.3 OPERATIONAL FLOW CHART

Power ON
VDD1=5V
BSENS
Pin 73
ASENS
Pin 72
dsens
Pin 39
ASENBO←H
Pin 80
TE
L 13942296513
CSENS
Pin 91
communication
with Grille
microcomputer.
SWVDD←H
Pin 38
Source keys
operative
Source ON
SYSPW←H
www
Pin 1
.
Completes power-on operation.
(After that, proceed to each source operation)
5
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Pin 14
BSENS=L
ASENS=L
dsens=L
2V < CSENS < 3V
Starts
x ao
y
i
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6
8
Q Q
3 6 7 1 3
<
- CSENS 2V , 3V CSENS
=
Last source returns.
CD 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.
u163
.
DEH-P750MP/XN/UC
6
7
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
<
=
m
co
7
8
9 9
A
B
C
2 8 9 9
D
E
F
81
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