25
AVIC-W8400NEX/XNUC
5
6
7
8
5
6
7
8
A
B
C
D
E
F
5. DIAGNOSIS
5.1 TROUBLESHOOTING
TROUBLESHOOTING
Symptom
Check point
Comments
Suspected defective unit
No Power
Check the Fuses and Power supply.
Refer to "Fuse Check" and "Diagnosis of Back
Light" on this manual.
AV unit
No Back light
Refer to "Diagnosis of Back Light" on
SM and check each check point.
AV unit, IF unit, Monitor unit or LCD
Black screen / White screen / Vertical Lines
In some cases, Key LEDs are lit.
1. Check the FFC connection between
Monitor unit (
CN5002
) and Service IF
unit (
CN2701
).
2. Try to remove and re-insert above
FFC (both side of connectors).
Check wether FFC is not inserted completely to
the connector (slanting insertion).
Check whether there is no foreign object in the
connectors.
Slanting insertion of FFC
SOC unit, Monitor unit or LCD
Will not boot up.
Opening screen is appeared but reset by itself.
Try to perform Self-Check Program in
Test mode.
If test mode check is ok, the storage SD card
might be defective.
Storage SD card or SOC unit
Touch Panel does not responding.
Try to perform Touch Panel Test in
Test mode.
Touch Panel
"AMP Error" is displayed.
Check the speaker connection.
If the speaker connection is no
problem, check the check points on this
manual.
DC offset is detected (Low active).
Refer to "Diagnosis when AMP Error is
displayed" on this manual.
When Power AMP is defective, this error will not
be displayed.
AV unit
"Product overheat. System will be shut down
automatically in 1minute." is displayed.
Try to restart the unit by ACC Off/On.
If not solved, check the check points on
this manual.
This error is displayed when SOC temperature is
more than 95 degrees C.
Refer to "Diagnosis when Product overheat is
displayed" on this manual.
SOC unit or Storage SD card
No sound via speakers
Check RCA output.
Refer to "Audio Block Diagram" on this manual.
If sound is output via RCA output, Power AMP
might be defective.
Power AMP
No Sound
Check analog audio and digital audio.
Refer to "Audio Block Diagram" on this manual.
If no sound for digital sound only, SOC unit might
be defective.
AV unit (DSP,E-VOL) or SOC unit
"
Error-02
" is displayed on Bluetooth related
functions. Cannot use BT hands free call, BT
audio etc.
Check Bluetooth version in Test mode.
If "ERROR!" or "NO_SET" is
displayed, replace BT Module.
BT Module
No BT microphone sound
Check the microphone (cord)
and mic jack.
Microphone (for hands-free)
Poor or no GPS reception
Check the GPS antenna location,
metal sheet and GPS antenna.
GPS antenna or CHIPS B COMP Unit
Vehicle Icon rotates or map rotates
Check 3D Calibration Status screen or
External Connection Test in test mode.
CHIPS B COMP Unit (Gyro sensor)
Vehicle Icon is behind the actual position.
Check 3D Calibration Status screen or
External Connection Test in test mode.
CHIPS B COMP Unit (G sensor)