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041-331 MCU PWB F8 Open RAP
BSD-ON:
BSD 1.9 - Power Interlock Switching (2 of 2)
BSD-ON:
BSD 1.7 - DC Power Distribution
Fuse 8 on the MCU PWB has blown.
NOTE: Remove the cause of Fuse meltdown before replacing the MCU PWB.
When turning the power OFF, turn OFF the power switch first and then the main power switch.
Chip fuses on the MCU PWB seldom fail because of an internal MCU problem. The cause is
almost always a short circuit in the wiring or components fed by the fuse. You MUST determine
the source of the short before replacing the MCU PWB.
Procedure
1.
Check the HCF PWB
(PL
10.8) circuit +24 Volt
age, and then replace the faulty parts or repair the circuits.
2.
Turn the power OFF and replace the MCU PWB
Initial Issue
WorkCentre 5335 Family Service Documentation
(options),
CAUTION
IOT wirenets
for overcurrent and overvolt-
(PL
18.2).
BUS Updated 12/2011
041-340 MCU NVM (EEPROM) Data Fail RAP
BSD-ON:
BSD 3.1 - ESS-MCU Communication
The specific values of the NVM (EEPROM) data are not in their specified addresses.
NOTE: When turning the power OFF, turn OFF the power switch first and then the main power
switch.
Procedure
1.
Turn the power OFF and ON.
2.
Install the correct version of the IOT firmware.
3.
Initialize the IOT NVM. If the problem persists, replace the MCU PWB
07/2011
2-759
(PL
18.2).
Status Indicator RAPs
041-331, 041-340
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