Diagnosis; Operational Flowchart - Pioneer AVH-X1500DVD/XNUC Service Manual

5

5. DIAGNOSIS

5.1 OPERATIONAL FLOWCHART

VDD50 : pin 24
bsens : pin 110
asens : pin 111
socstb : pin 37
ASENBO : pin 100
DDCCLK : pin 65
VDCNT5 : pin 69
VDCNT8 : pin 70
SYSPW : pin 66
5
6
RESET
VDD50=3.3V?
Y
bsens=L?
Y
asens=L?
Y
socstb=H?
Y
ASENBO←H
DDCCLK←Clock Out
(Frequency of 413.9 kHz)
VD5, 8←H
Starts
Communication
with Display microcomputer
Source keys operate
↓
Source ON
SYSPW←H
AVH-X1500DVD/XNUC
6
7
Standby
7
8
A
B
C
D
E
F
39
8