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Chapter 3 Removal and Replacement Procedures (RRPs)
Version 3 2007.03.15
Removal 29 MACHINE CONTROL UNIT (PL9.1.20)
Never fail to perform the diagnostic operation described below. Otherwise the data will be
lost in the worst case.
Use a wristband to protect the PWB from electrostatic damage.
1) Perform NVM Save to evacuate the MCU data.
2) Turn on the power while pressing the key, key, and [MENU] key on the control panel.
3) Enter the password, press the key twice, and press the
3
key once. The diagnostic screen
comes up.
4) Press the key several times until “IOT Diag” is displayed. Press the
3
key once.
5) Press the key several until “NVM Settings” is displayed. Press the
3
key once.
6) Press the key several times until “NVM Save” is displayed. Press the
3
key once.
7) Press the
3
key twice, and NVM Save is performed.
8) After NVM Save is complete, press the [CANCEL] key several times until “IOT Diag” is dis-
played.
9) Press the key several times until “Complete” is displayed.
10) Press the
3
key three times. “Ready to Print” is displayed.
11) Turn off the power.
12) Remove the POWER CORD from the AC outlet.
Steps 13 through 17 are for reference. Before removing this component, check that Steps 13 through
17 have been performed.
13) Remove the FUSER. (Removal 8)
14) Remove the REAR COVER. (Removal 12)
15) Remove the LEFT COVER. (Removal 22)
16) Remove the SHIELD ASSY ESS. (Removal 27)
Continues to the next page.