Diagnosis; Operational Flowchart - Pioneer AVH-X1700S/XNUC Service Manual

1

5. DIAGNOSIS

5.1 OPERATIONAL FLOWCHART

A
VDD : pin 26
bsens : pin 124
B
asens : pin 125
C
LS2_STB : pin 31
ASENBO : pin 112
D
DDCCLK : pin 73
VDCNT5 : pin 77
VDCNT8 : pin 78
LCDPW : pin 81
GEPW11 : pin 37
E
SYSPW : pin 74
EV58CNT:pin 62
F
26
1
2
RESET
VDD = 3.3V?
Y
bsens = L?
Y
asens = L?
Y
LS2_STB = H?
Y
ASENBO←H
DDCCLK←Clock Out
(Frequency of 413.9kHz)
VD5, 8←H
LCDPW, GEPW11←H
Starts
Communication
with Display microcomputer
SYSPW←H
EV58CNT←H
Source keys operate
↓
Source ON
AVH-X1700S/XNUC
2
3
Standby
3
4
4