Troubleshooting - Pioneer AVIC-F700BT Service Manual

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5.4 TROUBLESHOOTING

QQ
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- FLOWCHART
A
No Power
Key illimination is
lighted?
B
NAVI5V is OK?
YES
NAVI3V from the
NAVI unit is OK?
C
Key illumination is
lighted more than 20
seconds?
TE
L 13942296513
LCD backlight is OK?
No Display
(White or Gray screen)
D
NAVI unit failure.
E
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40
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http://www.xiaoyu163.com
2
Check the following signal in the
NO
AV unit.
(BSEN/ASEN/ILM, 8 V Power
supply)
YES
Check the Power supply (D/D
NO
converter) block and Control signal
(48pin NAVICON) of the System
(No output)
u-com in the AV unit.
NAVI unit failure.
(NAVI3V is supplied from NAVI
NO
unit and also NAVI3V is
(No output) generated from NAVI5V)
YES
Initial communication error
between NAVI and AV unit.
NO
- Confirm communication line
between 2 unit. (*1)
Key illimination
- Change the NAVI unit
go off after 20
YES
seconds.
NO
block for "LCD Panel
YES
LCD Panel unit failure.
x ao
y
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AVIC-F700BT/XS/UC
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http://www.xiaoyu163.com
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8
Q Q
3 6 7 1 3
Power supply
NO
unit" is OK?
YES
u163
.
3
4
2 9 9 4 2 8
(*1)
Normal operation after ACC ON
- RESETB: High
- OFFINFO: L -> H
- OFFANS: H -> L
- CTOSYS: UART
- SYSTOC: UART
- CPUWDT: L
- BATFAULT: L
Notes:
All siganl mentioned above are control
key signal from System u-com (AV
unit) to NAVI unit.
The "H" voltage is different depends on
the location.
- Port of system u-com: 5 V
- Connector of AV unit: 3 V
1 5 0 5 8 2 9 9 4
LCD unit failure.
m
co
4
9 9
2 8 9 9