09/03
2-59
DC 3535/2240/1632, WC M24
4-340
Status Indicator RAPs
Initial issue
4-340 IOT RAM Failure
MCU PWB RAM test failed.
Procedure
Switch the power off, then on. The problem continues.
YN
Return to Service Call Procedures.
Check the connection between the MCU PWB and the MCU NVM PWB. If the check is OK,
replace the MCU PWB (PL 13.1).
CAUTION
Careful replacement of the MCU NVM PWB (REP 1.15) is important to avoid serious machine
failure.
If the problem continues, replace the MCU NVM PWB (PL 13.1).
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