Specifications

Chapter 14: Removal and Replacement Procedures --- Electrical Modules
14-11
RRP 6.5 MCU PWB
NOTE: If you replace the MCU PWB, you lose the current Total Print Count
data recorded there. Write down the Total Print Count data
before replacing the MCU PWB.
Removal
1. Remove all of the covers.
2. Remove the Fuser Assembly (RRP 4.1).
3. Remove the controller (ESS). (RRP 6.2)
4. Remove the ESS enclosure (RRP 6.1).
5. Remove the Inteconnect PWB enclosure (with PWB)
6. Disconnect all P/Js on the MCU PWB.
7. Remove the four 6mm silver screws securing the MCU PWB to the Electronics Box.
8. Remove the MCU PWB.
Replacement
1. Position the MCU PWB in the Electronics Box.
2. NOTE: Enter the operating parameters into the NVRAM if you replace the old MCU PWB
with a new one.
3. Reinstall the four 6mm silver screws securing the MCU PWB to the Electronics Box.
4. Reconnect all P/Js on the MCU PWB (P/J 11 through P/J 20), plus P/J 21 if a Toner Sensor
Assembly is installed.
5. Reinstall the Interconnect PWB enclosure with PWB
6. Reinstall the ESS enclosure.
7. Reinstall the controller (ESS).
8. Reinstall the Fuser Assembly.
9. Reinstall the covers.