BUS Updated 12/2011
07/2011
2-761
WorkCentre 5335 Family Service Documentation
041-347 , 041-500
Status Indicator RAPs
Initial Issue
041-347 Serial I/O Fail RAP
BSD-ON:
BSD 3.1 - ESS-MCU Communication
The Serial I/O control clock is not input from the MCU PWB FPGA (Field-Programmable Gate
Array) to the CPLD (Complex Programmable Logic Device).
NOTE: When turning the power OFF, turn OFF the power switch first and then the main power
switch.
CAUTION
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.
Turn the power OFF and ON.
2.
Turn the power OFF and check whether there is any foreign substances or improper sol-
dering at the FPGA (Field-Programmable Gate Array) and CPLD (Complex Programma-
ble Logic Device) pins on the MCU PWB.
If no problems are found, replace the MCU PWB (
PL 18.2
).
041-500 Write to IOT-ROM Error Detection (During
Download) RAP
Job Fail. An error has occurred during the process of writing data to the IOT-ROM. (During
Download. Not able to carry out normal operation because ROM content is missing.
Procedure
Retry job. If retry failed, replace the IOT-ROM and perform download again.