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fPE
OF
PROBLEM
OTOR W O N T OPERATE
gnosing circuit board in-
ator lamps. The normal
ndition is red lamp on,
1ar lamp on when board
is
ring
pump
to run.
~llow Pressure Relief Pro-
dure. Remove gun from
l e e .
Remove pressure con-
)I cover and check for faulty
nps.
ndition
of
circuit board
mdition A both lamps on:
Imp won't operate and
>tor is not running
ondkion B
0th lamps off
WHAT
TO
CHECK
It check Is
OK,
t o t o next check
.
Check leads from bridae
(3081
to motor to be
sure thei are securelyiastened and properly
mated.
:.
Check G1 and G2 connections between cir-
cuit board
123)
and bridge
W S )
for damage
or 10088 terminals.
,,
Check for l o o s e motor brush lead connec-
tions and terminals. See page
2 2 .
..
Check brush length which should be 1/2"
minimum. See page
22.
the same rate on both sides of the motor.
NOTE also that the brushes do not wear at
i.
Check for broken or misaligned motor brush
springs. Rolled portion of spring must rest
squarely
on
top of brush. See page
2 2 .
i. Check motor brushes for binding in brush
holders. See page
22.
1.
Check motor armature commutator for burn
spots, gouges and extreme roughness.
Remove motor cover and brush inspection
plates to check. See page
22.
mature tester (growler) or perform spin test.
See page 19.
good bridge or performlng brldge
teat.
See
page
20.
CAUTION: Do not perform this check until
armature is determined to be good. A bad
armature will immediately burn out a good
bridge.
I.
Check motor armature for shorts using ar-
j.
Check bridge (308) by sybstituting with a
2. Check sprayer power supply cord (3111.
Disconnect TP6 female and TP1 female and
sprayer. Meter should read 105 to 125 VAC.
connem
volt meter to these leads. Plug in
Unplug sprayer. Reconnect TP1.
3.
Check ONlOFF switch (303). Disconnect TP:
and connect volt meter to TPB female and
TP2 male. Plug
in
sprayer and turn on. Mete
should read 105 to 125 VAC. Turn off and
unplug sprayer. Reconnect TP2.
I . Check jumper wire
(5%).
Disconnect TP3
and connect volt meter to TP6 female and
TP3
female. Plug in sprayer and turn
on.
Meter
should read
105
to 125 VAC. Turn off
and unplug sprayer. Reconnect TP3.
5. Check circuit breaker
1309).
Connect
v o l t
meter to TP6 female and TP4. Plug in
sprayer and turn
on.
Meter should reed 105
to 125 VAC. Turn off and unplug sprayer.
7 7
-
1.
2.
3 .
4.
5.
6.
7.
8.
9.
"
1.
2.
2
r
3.
4.
5.
WHAT TO
DO
When check is not
OK
refer to this columr
Replace any l&e terminals and crimp to
leads. Be sure male terminal blades are
straight and firmly connected to mating part.
Clean circuit board male terminals. Replace
loose or damaged terminals. Securely recon-
nect leads.
Tighten terminal screws. Replace brushes if
leads are damaged. See page
22.
Replace brushes. See page
2 2 .
Replace spring if broken. Realign spring witb
brush. See page
22.
Clean brush holders. Remove carbon with
small cleaning brush. Align brush lead with
slot in brush holder to'assure free vertical
brush movement.
Remove motor and have motor shop resur-
face commutator if possible. See page
30.
Replace motor. See page
30.
Replace bridge. See page 24.
Depress circuit breaker button to reset. if cil
trical Short", page 16.
cuit breaker continues to open, see "Elec-
Replace power supply cord. See page
23.
Replace ON/OFF switch. See page
2 3 .
Replace jumper wire. See page
25.
Replace circuit breaker. See page 24.
(Continued)
Troubleshooting continued on next page
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