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1-4. NO POWER MUFFIN2 FAILURE
Muffin2 Fail Suspected
Yes
Muffin2 LOG is
displayed
No
No
Power uCom and
DDCON/LDO OK?
Yes
No
Crystal X1000
Is there 24MHz?
Yes
No
Muffin reset released?
ORESETB=High
Yes
Yes
eMMC clock present?
No
Replace Muffin
XBR-49X835D
Write DDR check
Is there DDR error?
bootloader
No
Check Muffin Log
Follow 1.2&1.3
related to eMMC
Is there "CRC error"
No
Store SW log, check SW
Replace crystal
behaviors.
Check uCom
Follow 1.2
Write DDR check
Is there DDR error?
bootloader
No
eMMC
data corruption
1-5. NO POWER MUFFIN2 REPLACEMENT
Yes
Replace DDR
Yes
Replace eMMC
Yes
Replace DDR
TROUBLE SHOOTING
Muffin2
replacement flow
Data on eMMC need to
eMMC
erase
be erase first before
changing Muffin
If cannot be erased,
erase after replacing
Muffin2 replacement
Muffin
SW write
27
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