09/03
4-13
DC 3535/2240/1632, WC M24
REP 1.13
Repairs and Adjustments
Initial issue
REP 1.13 ESS NVM PWB
Parts List on PL 13.1
Removal
1. Gather all available settings information. This includes the machine NVM log, the
Machine Settings floppy disk, copies of the Configuration Report, etc. If possible save the
current Machine Settings to the floppy.
WARNING
To avoid personal injury or shock, do not perform repair or adjustment activities with
the power switch on or electrical power applied to the machine.
2. Remove the Connector Cover (PL 10.2).
3. Remove the DIMM Cover (PL 13.1).
CAUTION
The ESS NVM PWB has a lithium battery. Dispose of the used battery following the manufac-
turers' instructions after replacing. Do not throw it away at customer's site.
CAUTION
PWBs can be damaged by electrostatic discharge. Observe all ESD procedures.
4. Remove the ESS NVM PWB (Figure 1).
Figure 1 Removing the ESS NVM PWB
Replacement
1. Install the new ESS NVM PWB and reassemble the machine. Connect the PWS and
switch on the power.
CAUTION
GP10 is used to maintain the integrity of the serial number and billing data, when one or more
serialized PWBs must be replaced.
To maintain the integrity of the serial number and billing data, never replace all three listed
PWBs at the same time. If any of the following billing data PWBs needs replacing, only replace
them one at a time.
• ESS NVM PWB (PL 13.1).
• MCU PWB (PL 13.1).
• ESS PWB (PL 13.1).
Failure to comply with the board replacement procedure in GP 10 could result in catastrophic
NVM corruption.
2. Follow the procedure in GP 10. If two or more serial numbers DO NOT match the M/C
label serial number, escalate the service call to Field Engineering or the NTC.
3. Go to dC301 on the PWS. Initialize SYS-System, then initialize SYS-User.
4. If a good Machine Settings floppy is available, exit, then reenter the PWS Tool. Select
Read from Floppy when starting the tool. If no floppy is available, or if the data on the
existing floppy is questionable, go to step 6.
5. Go to dC351 and select Restore Machine Settings. When restoration is complete, go to
step 8.
6. If a good Machine Settings floppy is not available, or if the data on the existing floppy is
questionable, go to dC351. In the Special Batch Write area, select the appropriate market
region, then press the Batch Write NVM button.
7. Using the resources gathered in step 1 of the removal procedure, reenter NVM data to
restore the machine configuration.
8. Ensure that the network information (IP address, etc.) is correct. Contact the customer’s
system administrator to configure, if necessary.
9. Go to dC351 and select Save Machine Settings. Save the settings to floppy disk per the
procedure.
Remove ESS NVM PWB
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