Graco ProMix Auto Series, Service Parts

Page: 21 / 48

Service
311189L 21
Replacing Power Supply Board
1.
Follow Before Servicing procedure, page 18.
2.
Unlock and open EasyKey™ door with its key.
3.
Disconnect cables (G1, G2, G3). F
IG
. 16.
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
. 16.
3.
Snap new fuse into holder.
4.
Follow Replacing Power Supply Board , steps
8-12.
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.
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
. 16
H
521a
Do not remove
this screw
Y
F3, F4
F1, F2
J
Back of Board (521a)
Z
H
TI4887b
(line in fuses)
(power out fuses)
G2
24 Vdc input
G3
line power in/out
G1
IS power to
fluid plate