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E-4
TROUBLESHOOTING
E-4
SYNERGIC 7 & 7H
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
7. No control of wire feed.
8. No wire feed, solenoid, or arc volt-
age. LED display indicated
Synergic 7 has input power.
a.
Problem with serial communications.
b. Defective wire feed motor tach or
control PC Board.
a. Faulty gun or gun trigger switch.
b. Defective control PC board or
gun connector.
a. If WFS and preset Volts/Trim parame-
ters on wire feeder display do not
match those on power source display,
see Problem 14.
b. Measure voltage across pin 2 (+) of J3
and pin 3 (-) of J3 on PC board with
motor running. If voltage is 1.5-3.5V
then replace control PC board (see
Procedure for Replacing PC Boards).
If not, then replace tachometer.
a. Remove gun. Check continuity
between trigger pins with trigger
closed. If no continuity repair or
replace gun.
b. Remove gun. Check voltage across
trigger sockets on gun connector.
If voltage > ± 11 VDC then gun is
defective.
If voltage is < ± 11 VDC then check
the voltage across pin 2 (+) and pin 8
(-) of connector J1 on control PC
board.
If the voltage is still < ± 11 VDC then
replace control PC board. (See
Procedure for replacing PC boards).
Otherwise, either the gun connector or
wiring harness is faulty.