Sony RB1G Service Manual page 31

Troubleshooting
3-1-3. No POWER: Ayu2 Failure
AYU2 Fail Suspected
AYU2 is working,
Yes
but specific block fails;
like no picture,
I/O damage, etc
No
Yes
AYU2 LOG is displayed
No
Yes
AYU2 power is OK
No
Yes
Software was written
successful ly
at least one time
No
Replace Ayu2
See AYU2
replacement flow
Check DDR Find Some
using CheckSW Error message
Yes
DDR device fail
From the error
Check
message, we can
DDR & RawNAND
find which device
interface
has failure.
Move to device
analysis phase.
Replace both
AYU2 & RawNAND
No
Check RawNAND
using CheckSW
No
RawNAND data fail
Check SW behaviors.
Data fails are
especially in
environment area.
If this Area has
broken, check soft
In this case,
cannot run
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.
W600A/ W603A/ W605A/ W607A/ W650A/ W651A/ W653A/
W654A/ W655A/ W656A/W657A/ W658A/ W670A/ W674A
Store Error
message.
Yes
Find Some
If it is
Error message
unacceptable
Errors,
No
it is RawNAND
device failure
Store SW log,
Erase RawNAND
Note:
(AYU2) – IC9000
(Brownie)- IC9001
RB1G CHASSIS
31