Graco ProMix II Series, Service Parts, Page: 18 / 40

Service
◆
EasyKey™ Display
18 310653D
Replacing Power Supply Board
1.
Follow Before Servicing procedure, page 14.
2.
Unlock and open EasyKey™ door with its key.
3.
Disconnect cables (G1, G2, G3). F
IG
. 10.
4.
Remove 2 screws (H) and remove cover (J).
5.
Noting their location, remove 5 screws (Y) from
power supply board (521a). Remove board.
6.
Apply thermal compound to the heatsink (Z) on the
back of the new power supply board (521a).
7.
Install the new power supply board with the 5
screws (Y).
8.
Install cover (J) with 2 screws (H).
9.
Connect cables (G1, G2, G3).
10.
Close and lock EasyKey™ door with key.
11.
Turn on power at main circuit breaker.
12.
Turn EasyKey™ power on to test operation.
Replacing Power Supply Fuses
1.
Follow Replacing Power Supply Board, steps
1-4.
2.
Remove the fuse (F1, F2, F3, or F4) from its fuse
holder. F
IG
. 10.
3.
Snap new fuse into holder.
4.
Follow Replacing Power Supply Board, steps
8-12.
WARNING
Servicing the power supply board exposes you to high
voltage. To avoid electric shock, turn off EasyKey™
power and shut off power at main circuit breaker
before servicing.
WARNING
Servicing the power supply board exposes you to high
voltage. To avoid electric shock, turn off EasyKey™
power and shut off power at main circuit breaker
before servicing.
Fuse Part No. Description
F1, F2 114788 2 amp, time lag
F3, F4 15D979 .4 amp, quick acting
F
IG
. 10
G1
G2*
H
521a
Do not remove
this screw
Y
F3, F4
F1, F2
J
Back of Board (521a)
Z
G2
H
TI4887a
(line in fuses)
(power out fuses)
(power to
fluid plate)
(power
in)
(power to
display board)