BUS Updated 12/2011
07/2011
2-756
WorkCentre 5335 Family Service Documentation
041-325, 041-326
Initial Issue
Status Indicator RAPs
041-325 MCU PWB F2 Open RAP
BSD-ON:
BSD 1.9 - Power Interlock Switching (2 of 2)
BSD-ON:
BSD 9.1 - CRU Life Control
BSD-ON:
BSD 9.3 - Development and Toner Dispense Control
Fuse 2 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.
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.
Dispense Motor for revolution failure:
Component Control
[093-002] (
PL 8.2
)
2.
Check the Toner Dispense Motor +24 Volt
IOT wirenets
circuits for overcurrent and over-
voltage, and then replace the faulty parts or repair the circuits.
3.
Check the CRU Fan +24 Volt
IOT wirenets
circuits for overcurrent and overvoltage, and
then replace the faulty parts or repair the circuits.
4.
Turn the power OFF and replace the MCU PWB (
PL 18.2
).
041-326 MCU PWB F3 Open RAP
BSD-ON:
BSD 1.9 - Power Interlock Switching (2 of 2)
BSD-ON:
BSD 9.2 - Charging and Exposure
BSD-ON:
BSD 8.5 - Registration
Fuse 3 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.
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.
Check the HVPS (
PL 18.1
) c24 Volt
IOT wirenets
for overcurrent and overvoltage,
and then replace the faulty parts or repair the circuits.
2.
Check the Registration Clutch (
PL 15.1
) c24 Volt
IOT wirenets
for overcurrent and
overvoltage, and then replace the faulty parts or repair the circuits.
3.
Turn the power OFF and replace the MCU PWB (
PL 18.2
).