Diagnosis; Operational Flowchart - Pioneer DEH-4200SD/XNEW5 Service Manual

5

5. DIAGNOSIS

5.1 OPERATIONAL FLOWCHART

Power ON
VCC1 = 3.3 V
Pin 14
BSENS
Pin 16
BSENS = L
ASENS
Pin 18
ASENS = L
DSENS
Pin 17
Starts
communication
with Grille
microcomputer.
SWVDD <- H
Pin 47
Source keys
operative
Source ON
SYSPW <- H
Pin 46
Completes power-on operation.
(After that, proceed to each source operation)
5
6
500 ms
500 ms
In case of the above signal, the communication
with Grille microcomputer may fail.
If the time interval is not 500 msec, the oscillator
may be defective.
DEH-4200SD/XNEW5
6
7
7
8
A
B
C
D
E
F
19
8