Graco ULTRA 1000 Instructions-Parts List Manual page 25

CIRCUIT BOARD REPLACEMENT
1. Remove the pressure control covar and screws.
2. Turn the pressure control knob all
the way counter-
tension on the circuit board (23). Also check
to
be
clockwise to the minimum setting to release spring
trol knob shaft ara exposed below the pressure ad-
sure only three or four threads of the pressure con-
justmant nut
(SI.
Back down the nut, if necessary.
See Fig 18.
CAUTION
Step 2 is essential to reduce the risk of damaging
the circuit board while removing or installing it.
3. Disconnect ALL wires from the board, incLding the
attention to'whera connections are made.
-
two heavy black wires. Refer to Fig 19. Pay close
4:. To remove the board from the box, pull out the
black plastic-tipped pin (330). Push the bortom of
the circuit board toward the wall of the box and
carefully slide the board out.
5. Install the board in the box at the same angle as it
was removed. Reconnect the wires as indicated in
Fig
19. Ease tha pin (330) into the retainer.
CIRCUIT BOARD 218-397A. 6 Wires
/ 3
To.reduce the risk of malfunction, be sure the flat
CAUTION
blade of the insulated male connector are
centered exactly in the wrap-around blade of the
female connector when connections are made.
Route all wires carefully to avoid interference with
trol cover.
the circuit bosrd, bourdon tube and pressure con-
~ ~~
6. Perform the Stall Pressure Calibration on page 27.
Fig 18
Fig 19