Xerox WorkCentre 5022 Service Manual page 548

6.5.2.18 Checking and Repairing the Billing Counter (621-
400)
Purpose
• If there is any difference between the Billing/Meter values at the 2 locations, the error
code (116-334 NVM Data Mismatch or 124-311 Serial Number Fail) will be displayed. The
corrective action for this condition is listed here.
Overview
• The Billing Counter for WorkCenter 5022/5024 is a Software Meter. The Billing Counter
number of sheets is stored in 2 locations - the [External (Master) EEP ROM] on the ESS/
MCU (AIO Controller) PWB and the [Mounted (Backup) EEP ROM] in the PWB.
Figure 1 j0mg41804
• When the power is turned ON, the Billing/Meter values that is stored in the EEP ROM at
the 2 locations will be checked. If a difference appears between the values at the 2 loca-
tions, the error code (116-334 NVM Data Mismatch or 124-311 Serial Number Fail) will be
displayed.
Procedure
1. Enter the CE Diag Mode and input 621-400 in the Chain-Link to perform NVM matching.
2. Input '1' in [NVM new value] if you want to restore the data from the External (Master)
EEP ROM to the Mounted (Backup) EEP ROM and input '2' if you want to restore the data
from the Mounted (Backup) EEP ROM to the External (Master) EEP ROM.
Input Value Operation Data Copy
0 Do nothing Default (NVM value)
1 NVM Restore Restores the data from the External (Master) EEP ROM to
the Mounted (Backup) EEP ROM
General
6.5.2.18 Checking and Repairing the Billing Counter
Table 1
Input Value Operation Data Copy
2 NVM Restore Restores the data from the Mounted (Backup) EEP ROM to
the External (Master) EEP ROM
3. Press <Start> to perform the repair.
4. Pressing <Clear (C)> returns you to the [Diagnostics Mode Base] screen.
06/2014
6-120
Table 1
Figure 2 j0mg64011
Version 1.0
WC 5022/5024