Diagnosis Flowchart; Check Flow At Ms7 Back End - Pioneer AVH-P5200BT Service Manual

1

5.3 DIAGNOSIS FLOWCHART

Check Flow at MS7 Back End

A
NO
Does operation
take time?
B
YES
Flash life
NO
OK?
Execute check 12
YES
C
D
E
F
44
1
2
NO NO
Is the image
erroneous?
YES
AVCC5 voltage
NO NO
OK?
Execute check 8
YES
Video circuit
NO NO
OK?
Execute check 11
YES
NO
Go to FE Check
Repair defective parts
Go to FE Check
NO
AVH-P5200BT/XNUC
2
3
START
STANBY
NO
Can playback
start?
Execute check 1
YES
Is the sound
erroneous?
YES
AVCC5 voltage SDRAM IF
NO
OK?
Execute check 8 Execute check 6
YES
DACCLK
VD8,VCC5
NO
normal? Power supply voltage OK?
Execute check 7
Execute check 9
YES
Audio circuit
Go to FE Check
OK?
Execute check 10
YES
*1) Caution
*1) When a flash ROM generally needs to be
replaced by service, do not replace an IC but
a core unit (as no key or others is written in a
flash alone).
Normal?
YES
Go to FE Check
END
FE part normal?
Replace unit
NO
Normal?
END
3
4
VDD5
NO
(VCC33,VCC12)
OK?
Power supply voltage OK?
Execute check 2
YES YES
RESET
NO
OK?
Execute check 3
YES
NO VSENS
OK? OK?
Execute check 4
YES YES
27 MHz
NO
?
OK
Execute check 5
YES YES
Replace unit
NO
Go to FE-related
repair
YES
YES
4
NO