Circuit Board Replacement - Graco E Series Instructions-Parts List Manual

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eyes or on the skin, injury from moving parts, or
electric shock.
Refer to Fig 212-1 and
Remove the pressure control cover and screws,
2. Turn the pressure control knob all the way counter-
clockwise to the minimum setting to release spring
tension on the board. Also check to be sure only
three or four threads of the pressure control knob
shaftareexposed below the pressure adjustment nut
(S). Back down the nut,
CAUTION
is
Step 2 essential to reduce the risk of damaging the
circuit board while removing or installing it.
3. Disconnect ALL wires from the board, including the
two heavy black wires. Pay close attention to where
connections are made. See Fig 26-2.
To remove the board from the box, pull out the black
4.
plastic-tipped pin (330). Push the bottom of the cir-
cuit board toward the wall of the box and carefully
slide the board out.
Install the board in the box at the same angle as
was removed.
REF 321.
Fig 2 6 2
26

CIRCUIT BOARD REPLACEMENT

if necessary. See Fig 26-1.
REF 320
CIRCUIT
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Fig 2 6 1
Be. sure the flat blade of the insulated male
connector is centered in the wrap-around blade
the female connector when the connections are
made.
Route all wires carefully to avoid interference with
the circuit board, bourdon tube, or pressure control
cover.
These precautions are essential to reduce the risk of
a malfunction.
7. Perform the STALL PRESSURE CALIBRATION
starling on page 28, if you installed a new board.
.
KNOB
PRESSURE CONTROL
CAUTION
of