Sony KDL-43W780C Service Manual ▷ View online
IC9104
F9104
C9155
SL
9107
C9171
SL
9109
3
SYSTEM
3_PWR
25
IC9105
F9106
C9163
SL910
8
4
26
In this case, corrupted
data are written to
eMMC/ NAND flash in
proper way.
So, we have to check the
logs of exception or
errors.
Erase eMMC/
RawNAND is a last
option. If still NG after
erase, please replace
eMMC/RawNAND
27
Troubleshooting
3-1-5. NO POWER – AYU2L failure
AYU2L Fail Suspected
(1) Check DDR &
eMMc / RawNAND
interface OK?
Replace Board
Find Some
Error message
Replace
AYU2L or Board
eMMC/ RawNAND
data fail
No
AYU2L LOG is
displayed
No
Yes
Store SW log,
Check SW
behaviors.
No
Yes
Yes
No
Check
eMMC / RawNAND
using CheckSW
No
Check DDR
using CheckSW
Find Some
Error message
Data fails are
especially in
environment area.
If this Area has
broken, check soft
cannot run
DDR device fail
No
Yes
Erase
eMMC/ RawNAND
From the error
message, we can
find which device
has failure.
Move to device
analysis phase.
eMMC /
RawNAND erase
Product SW rewrite
Recover?
Product SW
writing issue
Yes
Check error message
It is unacceptable
error?
Erase & Replace
eMMC/ RawNAND
Yes
Product SW write
If still NG after SW
rewrite, please go to
(1) Check
MMC/RawNAND
interface
28
Troubleshooting
3-1-6. NO POWER – AYU2L replacement
AYU2L replacement
Product SW write
Recover?
AYU2L issue
Yes
No
AYU2L
replacement flow
eMMC / RawNAND erase
Data on eMMC/NAND need
to be erase first before
changing AYU2L.
Board Issue
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