Lincoln Electric Ranger 305D Service Manual page 66

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TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
The machine welds normally in all
modes and the range of weld out-
put seems normal, but one or both
of the front panel displays is blank.
displaying an obviously incorrect
value, or only parts of numbers are
illuminated.
A control cable type wire feeder
does not function when connected
to the 14 pin amphenol receptacle.
Machine operates normally in CC-
STICK mode, and has normal AC
auxiliary output.
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely,
contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
1-888-935-3877.
TROUBLESHOOTING & REPAIR
All manuals and user guides at all-guides.com
POSSIBLE AREAS OF
MISADJUSTMENT(S)
MISC. WELD ISSUES
1. It is normal for one of the dis-
plays to be off when there is no
load across the weld output ter-
minals. In CV-WIRE mode, only
the "VOLTS" display will be illu-
minated, in all other modes only
the "AMPS" display will be illu-
minated.
1. Check circuit breaker CB1 if
using a 115-120 VAC wire feed-
er. Check CB8 if using a 42
VAC wire feeder. Reset circuit
breaker if tripped.
2. Check the Amphenol receptacle
for damaged, corroded, or dirty
contact pins.
3. The wire feeder control cable
may be defective.
4. The wire feeder may be defec-
tive.
CAUTION
RANGER 305D
Observe Safety Guidelines
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
1. NOTE: Both the "AMPS" and
the "VOLTS" front panel dis-
plays use the same part num-
bered display unit. If one of the
digital displays appears to be
functioning normally, it can be
used to test the weld control PC
board output to the malfunction-
ing display.
2. If the known good display func-
tions normally when plugged in,
in place of the malfunctioning
display, the weld control PC
board is good and only the mal-
functioning display unit should
be replaced.
3. If the known good display
exhibits the same type of prob-
lem as the malfunctioning dis-
play, the weld control PC board
is defective and should be
replaced.
1. Use a volt meter to check for the
presents of supply voltage at
the 14 pin Amphenol receptacle.
115-120 VAC power is supplied
through pins A and J, 42 VAC
power is supplied through pins
1 and K.
2. NOTE: Be careful that meter
probes do not deform or dam-
age the contact pins in the
Amphenol receptacle.
3. Perform the STATOR VOLT-
AGE TEST.
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