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TROUBLESHOOTING & REPAIR
F-23 F-23
INVERTEC STT
T4 AUXILIARY TRANSFORMER TEST (continued)
11. Locate and remove leads #32A, #32B and
#33A, #33B from the T4 transformer tabs.
See Figure F.8.
ELECTRIC SHOCK can kill.
• With input power ON,
there are high voltages
inside the machine. Do
not reach into the
machine or touch any
internal part.
12. Carefully apply the 115VAC isolated supply
to the T4 transformer at the #32 and #33
tabs.
FIGURE F.8 – T4 TRANSFORMER LEAD CONNECTIONS
LEADS
32A, 32B, 33A, 33B
T4 AUXILIARY
TRANSFORMER
STT
STT II
T4 AUXILIARY
TRANSFORMER
LEADS
32A, 32B, 33A, 33B
WARNING