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PRECISION TIG 185
F-19 F-19
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TROUBLESHOOTING & REPAIR
T1 TRANSFORMER TEST (continued)
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. See
Main Transformer and Output
Choke Removal and
Replacement. Also check the
leads for broken or loose connec-
tions between plugs J3, J4 and
the T1 transformer.
7. Replace case wrap-around cover.
TEST POINTS ACCEPTABLE VOLTAGES
SECONDARY WINDINGS SECONDARY VOLTAGES
PLUG J3 PIN 8 (LEAD #210)
TO 18VAC
PLUG J3 PIN 7 (LEAD #209)
PLUG J3 PIN 4 (LEAD #201)
TO 18VAC
PLUG J3 PIN 3 (LEAD #204)
PLUG J4 PIN 2 (LEAD #260)
CHECK DURING FIRST 5 SECONDS OF POWER UP
TO 115VAC
PLUG J4 PIN 3 (LEAD #232)
X1 TO X2 80 VAC
PRIMARY WINDINGS PRIMARY VOLTAGES
H1 TO H2 208VAC
H1 TO H3 230VAC
TABLE F.1 T1 TRANSFORMER VOLTAGE
NOTE: If the input voltages vary the secondary voltages will vary accordingly.