Diagnosis Flowchart - Pioneer AVH-P5050DVD Service Manual

1

5.3 DIAGNOSIS FLOWCHART

BACK END section flow
A
Does the
B
operation
NO take time?
YES
Is the life of flash
memory OK?
Conduct check item 12.
NO
YES
C
D
E
F
36
1
2
NO
NO
Is the image
Is the sound
in error?
YES
Is AVCC5
NO
NO
voltage OK?
voltage OK?
Execute check 8. Execute check 8.
YES
Is the video
NO
NO
circuit OK?
Execute check 11.
Execute check 9.
YES
NO
Execute check 10.
Go to FE
section check.
Repair the
defective part.
Go to FE
section check.
NO
AVH-P5050DVD/XN/RC
2
3
START
Can the
NO
Standby OK?
playback
Execute check 1.
start?
YES
in error?
YES
Is AVCC5
Is SDRAM
NO
IF OK?
Execute check 6.
YES
Is VD8, VCC5
Is DACCLK
NO
power supply
normal?
voltage OK?
Execute check 7.
YES
Go to FE
Is the audio
section check.
circuit OK?
YES
Normal?
YES
FE section check.
END
Is FE section
normal?
Replace the unit.
NO
Normal?
END
3
4
Is VDD5
NO (VCC33, VCC12)
power supply
voltage OK?
Execute
check 2.
YES
YES
NO
Reset OK?
Execute check 3.
YES
NO Is VSENS
OK?
Execute check 4.
YES
YES
Is 27 MHz
NO
OK?
Execute check 5.
YES
YES
Replace the unit.
NO
Go to FE related
repair process.
YES
YES
4
NO