30
AVIC-W8400NEX/XNUC
1
2
3
4
A
B
C
D
E
F
1
2
3
4
5.4 DIAGNOSIS OF BACK LIGHT
NO
YES
NO
YES
NO
NO
YES
AV UNIT(Side A)
10.8 V to 15.1 V
SERVICE IF UNIT
AV UNIT
MONITOR UNIT
Confirm that CP1:P201(AV UNIT) is 10.8V to 15.1V.
Does the mecha
operate after
POWER ON?
Trouble of 8 V DC/DC
converter of AV UNIT.
POWER ON
ACC OFF -> ON
Failure of Flexible Cable and
Connector between SERVICE IF
UNIT and MONITOR UNIT.
Is the
Backlight Cable of
TFT LCD connected
correctly?
Failure of Flexible Cable and
Connector between TFT LCD
and MONITOR UNIT.
IC5101 failure
TFT LCD failure
IC201
NACC8
DC/DC
P201
L201
K Bup
IC5101
BackLight
POWER IC
CP1
CP2
D5101
CP3
CP4
Implementation failure of
Resistors(R4049, R4043) of
IF UNIT
(SERVICE).
Pin10 and Pin22 of
IC5101 are 3.3 V?