
272 UDC 6300 Process Controller Product Manual 1/03
8.8 Parts Replacement Procedures, Continued
How to replace the
MCU/Inputs printed
wiring board
To replace the MCU/Inputs printed wiring board
(Part Number 51309176-002), follow the procedure listed in Table 8-17
and refer to Figure 8-5 for parts location.
Table 8-17 MCU/Inputs PWB Replacement Procedure
Step Action
1
Remove the chassis from the case. (See Table 8-14).
2
Remove the Bezel/Keyboard and Display board (See Table 8-15).
3
Access the Printed Wiring Boards (See Table 8-16)
4
Identify the MCU/Inputs PWB and remove the Communications
Option board if present (see Table 8-18).
5
Make sure the power select jumpers on the new board are in the
proper location for the voltage desired (see Figure 8-6).
6
Reassemble the Communications Option PWB to the MCU/Inputs
PWB if present.
7
Assemble the interconnects to the new MCU/Inputs board and
reassemble the boards reversing the procedure in Table 8-16
8
Reattach the Bezel/Keyboard and Display board.
Continued on next page
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