Diagnosis; Operational Flowchart - Pioneer DVH-P5000UB Service Manual

5

5. DIAGNOSIS

5.1 OPERATIONAL FLOWCHART

Power ON
VDD1 = 5 V
Pin14
BSENS
Pin17
BSENS = L
ASENS
Pin18
ASENS = L
DSENS
Pin21
DSENS = L
ASENBO <- H
Pin38
CSENS
Pin91
2 V < CSENS < 3 V
Starts
communication
with Grille microcomputer.
SWVDD <- L
Pin50
Source keys
operative
Source ON
SYSPW <- H
Pin46
Completes power-on operation.
(After that, proceed to each source operation)
5
6
Except 2 V < CSENS < 3 V
Last source returns.
DVD loading functions are available.
Keys except for EJECT key are not available.
300 ms
300 ms
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.
DVH-P5000UB/XN/EW5
6
7
7
8
A
B
C
D
E
F
25
8