Graco 309909H important safety instructions Replacing Display Circuit Board

Page 18

Repair

Replacing Display Circuit Board

CAUTION

To avoid damaging circuit board, wear a grounding strap.

1.Remove User Interface cover. See page 16.

2.Disconnect wires from display board (410). FIG. 4.

404

413	418	N
413	418
407

406

405

419

403

401

TI4755a

FIG. 4

3.Remove two screws (411).

4.Loosen setscrew (419) from knob (405) and remove knob assembly. Remove jam nut (N).

5.Remove and replace display board (410).

6.Reassemble. Refer to Electrical Schematic, page 22.

410

411

407

403

416 406

416

TI4756a

18

309909H

Image 18

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