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TROUBLESHOOTING & REPAIR
F-43 F-43
SQUARE WAVE TIG 275
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HIGH VOLTAGE TRANSFORMER REMOVAL
AND REPLACEMENT (continued)
FIGURE F.9 – SECONDARY LEADS AT HIGH FREQUENCY STARTER BOARD
TRANSFORMER
SECONDARY
LEADS
SQUARE
W
A
VE
TIG
275
REMOVAL PROCEDURE
1. Remove input power to the TIG 275 machine.
2. Using the 3/8” nut driver, remove the case
sides.
3. With the needle nose pliers, remove the two
secondary leads from the quick-connects on
the high frequency arc starter board assem-
bly. See Figure F.9.
4. Disconnect the in-line splice quick connect
from one primary lead to lead #238. Cut any
necessary cable ties.
5. Remove the lead splice from the other prima-
ry lead that is connected to lead #237, C6
capacitor and R5 resistor. See the Wiring
Diagram. Cut any necessary cable ties.
6. Using the phillips head screw driver, remove
the front mounting screw from the base of the
high voltage transformer. Take note of insula-
tor placement for reassembly.
7. With the phillips head screw driver, loosen the
two rear mounting screws.
8. Carefully slide the transformer forward and
remove it from the TIG 275 machine.