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1
5. DIAGNOSIS
5.1 OPERATIONAL FLOWCHART
A
B
ASENTO <- H
Pin28
C
Initial communication is
started on a TUN microcomputer.
IC8001
TUNACT
Pin27
IC102
D
H : Normal
E
F
42
1
2
IC102
Initial communication is
started on a monitor microcomputer.
L : Error
IC102
LSWVDD <- H
Initial communication is
started on a key microcomputer.
IC4001
H
Initial communication
Sorce key ON
AVH-P7900DVD/RE
2
3
Power ON
IC102
VDD = 3.3 V
Pin9
IC102
BSENS
Pin18
BSENS = L
IC102
ASENS
Pin19
ASENS = L
IC102
DSENS
0.85 ≤ X ≤ 2.45
Pin140
In H/U independent operation, it is ignored.
SWVDD <- H
Pin37
IC102
IC4001
SWVDD
Pin37
L : Error
H : Normal
Pin105
IC4001
IC7001
LSWVDD
Pin105
L : Error
H : Normal
H
H
formation
SYSPW <- H
IC102
Pin6
3
4
Initial communication is
started on a DSP microcomputer.
IC3001
BRST
Pin48
L : Error
IC102
H : Normal
4
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