Mitsubishi Electric PUHY-200YMF-B Service Handbook page 104

Thyristor module (SCRM)
<Judgment Method> Measure the resistance between each of the SCRM pins and judge if there is a failure or not by
the resulting values.
<Judgment Values 1> Check between G and K.
Use the smallest resistance range on the tester.
Judgment Value:
<Judgment Values 2> Check between AK1 and AK2.
Use the greatest resistance range on the tester.
Judgment Value:
<External View>
<Internal Circuit Diagrams>
AK1
K
G
AK2
AK1 AK1
K G K G
G K G K
AK2 AK2
AK1
K
G
G
K
AK2
–102–
1.5Ω ~ 80Ω
60kΩ ~ ∞Ω
AK1
K G
G K
AK2
K
G
G
K
AK1
G
K
AK2