Test the voltages per table f.1, Troubleshooting and repair, Internal voltage test – Lincoln Electric LN-8 SVM132-A User Manual
Page 66
INTERNAL VOLTAGE TEST
(continued)
TABLE F.1 – VOLTAGE TEST POINTS
F-16
TROUBLESHOOTING AND REPAIR
F-16
LN-8
ACCEPTABLE
CHECKPOINT
TEST
VOLTAGE
LOCATIONS
DESCRIPTION
LEAD NO.
READING
Input Circuit Breaker
Input voltage before the
#31 and #32
103 to 126VAC
and
circuit breaker and 2
Resistor R4
ohm resistor (R4).
Input Circuit Breaker
Input voltage after the
#31 and #32A
103 to 126VAC
and
circuit breaker.
Resistor R4
Input Circuit Breaker
Input voltage after the
#531 and #32A
103 to 126VAC
and
circuit breaker and 2
Resistor R4
ohm resistor (R4).
Gun trigger receptacle
Check voltage across
#524 (pin A) and
34 to 42VDC
pins A and C
gun trigger -
#528 (pin C)
- trigger open.
Terminals #7 and #32A
Auxiliary terminals
#7 and #32A
103 to 126VAC
located on relay board
(gas solenoid)
Note: Gun trigger must
be activated.
Terminals #626 and
Drive motor field
#626 and #627
102 to 125VDC
#627 located on relay
voltage.
board
Terminals #539 and
Drive motor armature
#539 and #541
4VDC (min) -
#541 located on control
voltage.
90VDC (max).
board
Note: Gun trigger must
be activated and
armature voltage will
be dependent upon wire
speed setting.
Control board
Check that 115VAC is
#32A (pin 12) and
103 to 126VAC
connector plug
being applied to control
#7 (pin 2)
board when gun trigger
is activated.
Relay board connector
Check that 115VAC is
#32A (pin 1) and
103 to 126VAC
plug
being applied to the
#531 (pin 4)
control board.