Graco ProMix II Service And Parts page 18

Service ◆ EasyKey™ Display
Replacing Power Supply Board
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.
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 . 10
IG
18
procedure, page 14.
. 10.
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
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.
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 . 10.
IG
3.
Snap new fuse into holder.
4.
Follow Replacing Power Supply Board, steps
8-12.
F1, F2
Y
521a
G2 G2
Description
2 amp, time lag
.4 amp, quick acting
G1
TI4887a
310653B