AVH-P4400BH/XUUC
33
5
6
7
8
5
6
7
8
C
D
F
A
B
E
5.3 DIAGNOSIS FLOWCHART
Is the image
in error?
Go to FE related
repair process.
Is VD8,
VCC5 power
supply voltage OK?
Execute
check 7.
Is AVCC5
voltage OK?
Execute
check 8.
Standby
OK?
Execute
check 1.
Is VDD5
(VCC33, VCC12)
power supply voltage OK?
Execute check 2.
Can the
playback
start?
Is SDRAM
IF OK?
Execute
check 6.
Is DACCLK
normal?
Execute
check 9.
Is the audio
circuit OK?
Execute
check 10.
Is the video
circuit OK?
Execute
check 11.
Repair the
defective part.
*1)Note
Normal?
NO
YES
YES
YES
Is AVCC5
voltage OK?
Execute
check 8.
Reset OK?
Execute
check 3.
Is VSENS
OK?
Execute
check 4.
YES
YES
YES
YES
YES
YES
YES
Go to FE
section check.
YES
YES
NO
NO
NO
Go to FE
section check.
NO
Replace the unit.
YES
YES
Normal?
YES
Go to FE
section check.
Is 27 MHz
OK?
Execute
check 5.
NO
YES
YES
START
END
END
Is FE section
normal?
Replace the unit.
YES
Go to FE
section check.
NO
NO
NO
Does the
operation
take time?
Is the
life of flash
memory OK?
Conduct check
item 12.
YES
YES
NO
NO
Is the sound
in error?
Is the
USB play
in error?
Is the iPod play
in error?
Is 48 MHz
OK?
Execute
check 13.
Is the USB
circuit OK?
Execute
check 14.
Is the iPod
circuit OK?
Execute
check 14.
Go to the
product check.
The product
is normal?(iPod
attestation IC)
YES
YES
Product repair
YES
NO
NO
NO
NO
YES
NO
YES
Replace the unit.
YES
Replace the unit.
YES
NO
NO
*1)
With service, even when exchange of a flash ROM
is required, please replace core unit .
(Since the key etc. are not written in in case of the
flash simple substance)
LS2 BACK END section flow
NO
NO
NO
NO
NO
Summary of Contents for AVH-4400BT/XUEW5
Page 87: ...AVH P4400BH XUUC 87 5 6 7 8 5 6 7 8 C D F A B E ...
Page 88: ...AVH P4400BH XUUC 88 1 2 3 4 1 2 3 4 C D F A B E 9 2 EXTERIOR 1 A D E B B C A C ...
Page 97: ...AVH P4400BH XUUC 97 5 6 7 8 5 6 7 8 C D F A B E ...
Page 149: ...AVH P4400BH XUUC 149 5 6 7 8 5 6 7 8 C D F A B E F F PCB UNIT SERVICE SIDE B ...