Xerox WorkCentre Pro 423 Service Manual page 298

WorkCentre Pro 423/428
REP 9.5.1 Option Mother PWB
Ref. PL:PL9.5
Removal
On printer or Fax-equipped machines, ensure that
outstanding jobs have cleared before servicing or
interrupting the power to the machine as follows:.
• FAX equipped machines: Ensure that the "Job in
Memory" indicator on the control panel goes out.
Press "Job Status:Stop" button and confirm that the
job has cleared from the "Current Jobs" folder.
• Printer machines: Ensure that "Ready to print or
fax" is indicated on the printer control panel.
WARNING
Switch off the machine and disconnect the
power cord.
CAUTION
Be careful not to damage parts by static electricity.
Electronic parts may be damaged by static electricity. Be
sure to wear a wristband when handling electronic parts. If
no wristband is available, touch the metal frame before work
to eliminate static electricity as far as possible.
Procedure
1. Remove the following parts.
1) Rear Cover(PL9.10)
2) Cover(PL9.5)
4-24 CHAPTER 4 DISASSEMBLY/ASSEMBLY AND ADJUSTMENT
03/02
2. Remove the NCU-C PWB. (Figure-1)
1) Remove the PWBs (3).
2) Remove the NCU-C PWB.
(Figure-1)j0hn4905
3. Disconnect the connectors. (Figure-2)
1) Disconnect the connectors (4).
(Figure-2) j0hn4906
4.2 Disassembly and Assembly
4. Remove the Option Mother PWB. (Figure-3)
1) Remove the screws (8).
2) Remove the Option Mother PWB.
(Figure-3) j0hn4907
Installation
Procedure
1. Perform the removal steps in reverse order.