Graco ProMix Auto Service Parts page 20

Replacing Power Supply Board
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.
1.
Follow Before Servicing
2.
Unlock and open EasyKey™ door with its key.
3.
Disconnect cables (G1, G2, G3). F
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.
Z
Back of Board (521a)
F . 15
IG
20
™
procedure, page 17.
. 15.
IG
Do not remove
F3, F4
this screw
H
J
H
11.
Turn on power at main circuit breaker.
12.
Turn EasyKey™ power on to test operation.
Replacing Power Supply Fuses
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.
F1, F2 114899
F3, F4 15D979
1.
Follow Replacing Power Supply Board, steps
1-4.
2.
Remove the fuse (F1, F2, F3, or F4) from its fuse
holder. F . 15.
IG
3.
Snap new fuse into holder.
4.
Follow Replacing Power Supply Board, steps
8-12.
F1, F2
Y
521a
G2 G2
Service
™
Description
2 amp, time lag
.4 amp, quick acting
G1
TI4887a
311189C