Diagnosis; Operational Flowchart - Pioneer DEH-2350UB/XNES Service Manual

1

5. DIAGNOSIS

5.1 OPERATIONAL FLOWCHART

A
Power ON
Vcc = 1.2 V
PVcc = 3.3 V
B
C
communication
with Grille
microcomputer.
D
SWVDD <- H
Source keys
operative
E
Source ON
SYSPW <- H
F
Completes power-on operation.
(After that, proceed to each source operation)
16
1
2
Pin 5
Pin 1
BSENS
Pin 141
BSENS = L
ASENS
Pin 143
ASENS = L
DSENS
Pin 140
DSENS = L
Starts
Pin 128
In case of the above signal, the communication
with Grille microcomputer may fail.
If the time interval is not 300 msec, the oscillator
may be defective.
Pin 7
DEH-2350UB/XNES
2
3
300 ms
300 ms
3
4
4