Rep 1.12 Ess Pwb - Xerox DocuColor 2240 Service Manual

REP 1.12 ESS PWB

Parts List on PL 13.1
Removal
1. Gather all available settings information. This includes the NVM log, the Machine Settings
floppy, Configuration Report, etc. If possible save the current Machine Settings to disk.
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 Right Cover (REP 14.3).
3. Remove the Top Cover (REP 14.1).
4. Remove the Rear Cover (REP 14.2).
5. Remove the ESS Top Cover (PL 13.1).
Protect the Hard Drive harness. The Hard Drive is mounted to ESS Top Cover; the har-
ness remains connected to the ESS PWB while removing the cover.
a. Remove screws (11) from ESS Top Cover.
b. Lift ESS Top Cover and place it upside down on Toner Cartridges.
c. Disconnect the Hard Drive harness from the ESS PWB.
PWBs can be damaged by electrostatic discharge. Observe all ESD procedures.
6. Remove the ESS PWB (Figure 1).
Repairs and Adjustments
REP 1.12
WARNING
CAUTION
CAUTION
3
Remove PS-1 ROM (ALL) and
PS-2 ROM (DC2240/1632)
2
Remove
ESS
NVM
1
Remove
MAC
ROM
8
Disconnect
Fan P/J310
Figure 1 Removing ESS PWB
Replacement
1. Reinstall the NVM PWB and the ROM/RAM/EPROMs that were removed from the original
PWB. Discard the MAC ROM from the new ESS PWB and install the MAC ROM removed
from the old ESS PWB.
GP10 is used to maintain the integrity of the serial number and billing data when one or more
serialized PWBs must be replaced. Never replace all three listed PWBs at the same time. If
any of the PWBs needs replacing, only replace them one at a time.
• ESS NVM PWB (PL 13.1).
• MCU NVM PWB (PL 13.1).
• ESS PWB (PL 13.1).
Failure to comply with GP 10 could result in catastrophic NVM corruption.
2. Follow the procedure in GP 10, to verify that the serial numbers and billing information is
correct.
02/03
4-10
4
5
Remove RAM
Disconnect Connec-
tor
7
Remove
jacks from
9 plate
Remove Screws (9, DC2240/1632) /
(7, DC3535) and remove ESS PWB.
Lift straight up to disconnect P/J460
on bottom of PWB
CAUTION
DC 3535/2240/1632
6
Remove
RAM (2)
Initial issue