RB1G
CHASSIS
W600A/ W603A/ W605A/ W607A/ W650A/ W651A/ W653A/
W654A/ W655A/ W656A/W657A/ W658A/ W670A/ W674A
31
Troubleshooting
AYU2 Fail Suspected
Software was written
successful ly
at least one time
Replace Ayu2
Find Some
Error message
Replace both
AYU2 & RawNAND
RawNAND data fail
No
AYU2 LOG is displayed
No
AYU2 is working,
but specific block fails;
like no picture,
I/O damage, etc
Yes
Yes
Store SW log,
Check SW behaviors.
No
Yes
No
Yes
AYU2 power is OK
Yes
Check
DDR & RawNAND
interface
See AYU2
replacement flow
No
Check RawNAND
using CheckSW
No
Store Error
message.
If it is
unacceptable
Errors,
it is RawNAND
device failure
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
In this case,
corrupted data are
written to NAND
flash in proper
way.
So, we have to
check the logs of
exception or errors.
Erase RawNAND
is a last option.
Erase RawNAND
From the error
message, we can
find which device
has failure.
Move to device
analysis phase.
3-1-3. No POWER: Ayu2 Failure
Note:
(AYU2) – IC9000
(Brownie)- IC9001