Diagnosis; Operational Flowchart - Pioneer AVH-P4000DVD Service Manual

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5. DIAGNOSIS

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5.1 OPERATIONAL FLOWCHART

A
Power ON
Vdd = 3.3 V
Pin 9
BSENS
Pin 75
B
ASENS
Pin 74
ACCPW
Pin 7
Starts
C
communication
with Display
microcomputer.
TE
L 13942296513
SWVDD
Pin 37
Source keys
operative
D
SYSPW
Pin 6
Completes power-on operation.
E
(After that, proceed to each source operation)
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F
30
1
http://www.xiaoyu163.com
2
H
500 ms
H
In case of the above signal, the communication
with Grille microcomputer may fail.
If the time interval is not 500/300 msec, the oscillator
may be defective.
Source ON or
Back Camera ON
H
x ao
y
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AVH-P4000DVD/XN/UC
2
http://www.xiaoyu163.com
3
8
Q Q
3 6 7 1 3
300 ms
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.
3
4
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
m
co
4
9 9
2 8 9 9