Graco FinishPro 390 Repair Electrical Manual page 13

Step 1
110-120 AC
Cord plugged in.
Switch ON.
V
Wires connected
to control board.
- -
Meter on AC Volts
J4
J3
Control
Board
To
Power Cord
Step 3
Cord plugged in.
100 + DC
Switch ON.
Pressure Switch
Turned to high.
V
Meter on DC volts.
- -
Red
Yellow
Blk
Control
Board
FinishPro 390
261779 Control Board
Airless Motor will not run
Pressure
Control
Motor
Assembly
2X Yellow
White
Power
Plug
BEEP
� �
Yellow
Red
Blk
Red (+)
Black (-)
Replaceable Fuse
FUSE
Black
Green
Step 4
Checking the motor
thermistor switch .
Unplug the motor
wires from control
board.
Carefully insert the
meter probes into the
2 yellow wires.
Meter should read
continuity.
Note: motor should be
cooled down.
Step 2
110-120 AC
Cord plugged in.
Switch ON.
V
Wires connected
to control board.
- -
Meter on AC Volts
F1
Control
FUSE
Board
J4
ON/OFF
Switch
To Compressor
Step 5
Motor plugged in.
Cord plugged in.
Switch ON.
Pressure switch
unplugged.
Control
Board
Insulated Jumper wire
stripped on the ends
J1
13