Xerox WorkCentre 5222 Service Manual page 829

Replacement
Fatal error occurs to machine software if MCU PWB is replaced before EPROM is installed on
MCU PWB and powered on.
This procedure installs a new MCU PWB. Refer to step 3 of Remove to install the same MCU
PWB.
Pin breakage occurs if the EPROM is carelessly replaced.
1. Install the EPROM from the old MCU PWB on the new MCU PWB
Figure 2 MCU PWB EPROM Location (j0st40901)
Repairs and Adjustments
REP 9.1.1
CAUTION
CAUTION
(Figure 2).
2. Install the MCU PWB and connect P/Js.
3. Install the rear covers.
a. Install the Rear Lower Cover
b. Install the Rear Middle Cover
c. Install the ESS Cover Assembly
4. Switch on the machine power.
5. Verify that the serial numbers and billing data are the same.
a. Access Diagnostic Routines.
i. Enter UI Diagnostics
ii. Access Diagnostic Routines.
b. Check serial number and billing data.
i. Select Adjustment/Others.
ii. Select Machine ID/Billing Data.
iii. Check that the Serial Number and Billing Data for IOT, Sys1, and Sys2 are the
same.
If they are the same, return to Service Call Procedures in Section 1.
If the data are different, perform
February, 2008
4-52
(PL 10.2).
(PL 10.2).
(PL 9.2).
(UI Diagnostic Mode).
GP 4 Serialization/Billing Maintenance.
WorkCentre 5225, 5230
Launch Version