Electrical; Main Pwb Replacement - Xerox 5915 Service Manual

9.1.2 Main PWB Replacement

Removal
1. If the machine is ready, make a copy
of Table Diag. Modes from the succeeding
pages.
2. Enter Diag. Mode and record the data of Chain
Codes into Table Diag. Mode.
NOTE: • If there is any unreadable data,
perform its appropriate adjustment
after the replacement of the Main
PWB.
3. WARNING: Power off the machine and
disconnect the power cord.
4. Open the Front Cover and then machine.
5. Remove the Rear Upper Cover.
6. Disconnect all connectors from the Main PWB.
7. (Fig. 1): Remove the Main PWB.
(Fig. 1)
4-35
Installation
1. Install the Main PWB.
2. (Fig. 2): Perform the Dip Switch(SW2) Setup.
3. Enter Diag. Mode and key in [20-96]. Perform
the initialization.
NOTE: • The initialization is required because
the new Main PWB's NVM values
are unstable.
Items to be Initialized:
. Set the initial value in each item
of Reference Chain 20.
. Set the initial value in each item
of Chain 50.
. Reset counters of Chain 30.
. Reset the jam histories of Chain
40.
Reference NVM stands for Nonvolatile Memory.
4. Key-in to NVM the data recorded in the table
in Removal Step 2.
5. Perform the Basic Copy Quality Adjustment.
.................................................... (5.1.4)
Section 4 Disassembly/Assembly/Adjustment

8. Electrical