Panasonic YC-400TX Manual page 19

The following points should be strictly observed in the event any of these tests are carried out in accordance
with your company regulation.
a. Disconnect cable from distribution box which is connected to three input terminals and short-circuit the three
input terminals.
b. Disconnect the secondary side current cable connected to two output terminals and short-circuit the two
output terminals.
c. Short-circuit the anode and cathode of the main circuit primary diode D1, the emitter and collector of the
main transistor Q1-Q2, the anode and cathode of the secondary diode D2 — D3 and thyristor.
d. Remove case grounding. (The case is grounded by a fast on terminal totalling 6 locations.)
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