Micromod Micro-DCI: 53MC5000 PLC AND PRINTER INTERFACES - Manual (Page 115)

10.0 PARTS REPLACEMENT
10.1 PARTS REPLACEMENT
The parts replacement procedure to access the DDI-A and DDI-B APB boards is provided in Table
10-1; see Figure 10-1.
WARNING
ALWAYS REMOVE POWER BEFORE ATTEMPTING TO INSTALL,
DISASSEMBLE, OR SERVICE THE CONTROLLER. FAILURE TO
REMOVE POWER MAY RESULT IN SERIOUS PERSONAL INJURY
AND/OR EQUIPMENT DAMAGE.
Table 10-1. Parts Replacement
Step Procedure
1 Insert a small screwdriver into the notch at the top center of the front display panel (item 4).
2 Twist the screwdriver to release the latch and slide the bezel straight forward.
3 Disconnect the display ribbon cable (item 8) from its socket at the back of the panel.
4 Use the plastic front edge board ejector to pry the expansion board (item 7) free of its
options connector board (item 6) socket.
5 Carefully slide the expansion board forward to access the ribbon cable (item 9) socket
behind the option cards.
6 Disconnect the ribbon cable from J11 on the expansion board.
7 Continue to slide the expansion board from the cabinet.
8 Remove the two screws that secure the option card retaining bar to the expansion board
brackets.
9 Grasp the suspect APB option card (item 11 or 12) at the edges and gently pull it free of its
expansion board sockets (2 sockets). The option card may have to be rocked slightly top
to bottom (not side to side).
10 To replace an option card: Note: Before installing the new APB card ensure jumpers J1
through J4 (
•—•) are set as shown below and illustrated in Figure 10-2:
J2 T- •—•
J1 R- •—•
J4 T+ •—•
J3 R+ •—•
(All of the jumpers are connected across the two pins in their own row and none of the
jumpers are cross connected into each other’s row of pins.)
Align the new card pin edges with the expansion board sockets and gently push the card in
until it is seated.
11 To install the option card retaining bar: Place the side of the retaining bar that has the
foam tape against the edges of the option cards and align each end of the retaining bar to
a bracket mounting hole. Install the two screws that secure the retaining bar to the end
brackets.
12 To install the expansion board: Reconnect the expansion ribbon cable to the expansion
board socket J11 and slide the board into the cabinet. Seat the board into its socket until
the ejector latch engages the lock pins.
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Section 10. Parts Replacement
PARTS
10-1