Brother BAS-340 - Control Box

4. Checking air valve's voltage
PB
<D Presser foor (R) valve
® Presser foot (L) valve
@ Work clamp valve
® Inner clamp valve
® Option valve 1
@ Option valve 2
(!; Option valve 3
, . ...;; @ Needle cooler valve
@ +24V
<1J> +24V
NOTE: @to@ are options.
@1 Control box
J 7 J 2
·~ 0
J4~ lmJs
000 0
ggg J 8
000
Jll ~ J3
~0
J9~ ~
li1~
Jlol 1~
I 1m I
L--.J
-58-
1) Turn the power switch OFF . Disconnect
connector P8 from J8, then measure the
resistance of each valve.
Resistance
of each valve (from <D to~) should
be approx.
300fl.
2) Connect connector P8 to J8, then turn the
power switch ON.
Insert the test probes into connector P8 from
the lead wire side, then measure the voltages.
Check points
Acceptable value
Between pins 1(-)and 10(+)
0.1V- 24V
Between
pins 2(-) and 10{ +) 0.1V- 24V
Between pins
3(-) and 1 0( +) 0.1V-24V
When the work clamp pedal is treadled, each
reading should be max. 24V
I min. 0.1V.
3) When the optional valve is used:
Measure
the resistance between each valve and
<i]). (Refer to step 1.)
Measure the resistance between each valve (-)
and @(+)when each valve operates. (Refer to
step 2.)
J 1
J2
J3
J4
JS
J6
J7
J8
J9
J10 :
Solenoid connector
Synchronizer connector
Connector for emergency stop, zero-point
signal and thread breakage detection
X-drive pulse motor connector
Y -drive pulse motor connector
Foot switch connector
Programming device connector
Air valve connector
Machine
light connector (6V AC, 2A)
Marker
light connector (SV AC, 3A)
From the library of: Superior Sewing Machine & Supply LLC