Lincoln Electric PRECISION TIG 185 SVM169-A Service Manual page 57

F-19
6. If all of the secondary voltages are
correct the T1 transformer is func-
tioning properly.
A. If all of the secondary voltages
are missing or incorrect make
certain that the correct input volt-
age is being applied to the correct
primary leads. See Table F.1.
B. If the correct input voltage is
being applied to the primary leads
and any or all of the secondary
voltages are incorrect the T1
transformer may faulty.
Main Transformer and Output
NOTE: If the input voltages vary the secondary voltages will vary accordingly.
TROUBLESHOOTING & REPAIR
T1 TRANSFORMER TEST (continued)
TABLE F.1 T1 TRANSFORMER VOLTAGE
TEST POINTS
SECONDARY WINDINGS
PLUG J3 PIN 8 (LEAD #210)
TO
PLUG J3 PIN 7 (LEAD #209)
PLUG J3 PIN 4 (LEAD #201)
TO
PLUG J3 PIN 3 (LEAD #204)
PLUG J4 PIN 2 (LEAD #260)
TO
PLUG J4 PIN 3 (LEAD #232)
X1 TO X2
PRIMARY WINDINGS
H1 TO H2
H1 TO H3
PRECISION TIG 185
Choke
Replacement.
leads for broken or loose connec-
tions between plugs J3, J4 and
the T1 transformer.
7. Replace case wrap-around cover.
See
ACCEPTABLE VOLTAGES
SECONDARY VOLTAGES
18VAC
18VAC
CHECK DURING FIRST 5 SECONDS OF POWER UP
115VAC
80 VAC
PRIMARY VOLTAGES
208VAC
230VAC
F-19
Removal and
Also check the