Honeywell UDC 3300 manual 2nd input board, Second Input Board Replacement Procedure Step Action

2nd input board

Follow the procedure listed in Table 9-19 to replace the Second Input board—P/N 30756715-501.

Table 9-19 Second Input Board Replacement Procedure

Step

1

2

3

4

5

6

7

8

9

10

Action

Remove the chassis from the case. See Figure 9-1.

Remove the printed wiring boards from the chassis. See Figure 9-3.

Lay the boards flat and identify the 2nd Input board. See Figure 9-4.

Remove the transformer plug from connector J14.

The 2nd Input board is attached to the Power Input board by three mounting posts. Locate these posts under the power input board.

Use a small pliers and squeeze the ends of each post together and push it up through the board. Remove 2nd Input board.

Orient the new 2nd Input board onto the Power Input board and push the mounting posts down through the Power Input board until they click into place.

Replace the transformer plug onto connector J14. Make sure the Input 2 jumper (W1/W2) is in the correct position. (Refer to Table 2-4.)

Slide the printed wiring boards back into the chassis. Make sure the connections to the display/keyboard assembly are made and that the release points on the chassis snap into place on the printed wiring boards.

Reinstall the chassis into the case. Push in hard, then tighten screw.

Power input board

Follow the procedure listed in Table 9-20 to replace the Power Input board—P/N 51309404-502 (90 to 264 Vac) or 51309404-501 (24 Vac/dc).

Table 9-20 Power Input Board Replacement Procedure

Step

1

2

3

4

5

6

7

8

9

10

11

Action

Remove the chassis from the case. See Figure 9-1.

Remove the printed wiring boards from the chassis. See Figure 9-3.

Lay the boards flat and identify the Power Input board. See Figure 9-4.

Remove the 2nd Input board, if present. See procedure in Table 9-19.

Remove the transformer connections to the Digital Input board and Auxiliary Output/Communications board, if present.

Remove the connector from plug WG if present (current output models only). Slide a small screwdriver under the connector and lift the release.

Replace the Power Input board.

Reinstall WG connector and transformer connections to Digital Input board and Auxiliary Output/Communications board, if present.

Reinstall the 2nd Input board. See procedure in Table 9-19.

Slide the printed wiring boards back into the chassis. Make sure the connections to the display/keyboard assembly are made and that the release points on the chassis snap into place on the printed wiring boards.

Reinstall the chassis into the case. Push in hard, then tighten screw.

266 UDC 3300 Controller Product Manual 4/00