Sony BRAVIA KDL-55W900A, Руководство по обслуживанию

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RB1G
CHASSIS
W900A/904A/905A
Troubleshooting
AYU2 Fail Suspected
3-1-3. No POWER: Ayu2 Failure
AYU2 is working,
but specific block fails;
like no picture,
I/O damage etc
Yes
See AYU2
replacement flow
I/O damage, etc
No
Y
Store Error
message.
N
Find Some
Error message
R NAND d t f il
AYU2 LOG is displayed
No
Yes
Yes
No
Check RawNAND
using CheckSW
No
If it is
unacceptable
Errors,
it is RawNAND
device failure
Check DDR
using CheckSW
Find Some
Error message
DDR d i f il
No
Yes
RawNAND data fail
No
Store SW log,
Check SW behaviors.
AYU2 power is OK
Yes
Check
DDR & RawNAND
interface
device failure
Data fails are
especially in
environment area.
If thi A h
DDR device fail
Erase RawNAND
From the error
message, we can
find which device
has failure.
Software was written
Yes
No
If this Area has
broken, check soft
cannot run
In this case,
corrupted data are
written to NAND
flash in proper
Erase RawNAND
has failure.
Move to device
analysis phase.
Software was written
successful ly
at least one time
Replace both
AYU2 & RawNAND
No
es
way.
So, we have to
check the logs of
exception or errors.
Erase RawNAND
Note:
33
Replace Ayu2
Erase RawNAND
is a last option.
Note:
(AYU2) – IC9000
(Brownie)- IC9001