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TROUBLESHOOTING & REPAIR |
STATIC SCR TEST (continued)
3.Using an analog ohmmeter test the resistance from anode to cathode of SCR1. Reverse the meter leads and check from cathode to anode of SCR1. See Figure F.4. If a low resis- tance is indicated in either direction SCR1 is faulty. Replace SCR Bridge Assembly. See SCR Bridge
Assembly Removal and Replacement.
5.The further check the SCR’s func- tions use an SCR tester and proceed to the Active SCR Test.
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4.Repeat Step #3 testing SCR2, SCR3 and SCR4.
FIGURE F.4 SCR TEST POINTS
| SCR2 CATHODE |
SCR1 ANODE | SCR3 CATHODE |
| |
| SCR4 ANODE |
SCR1 CATHODE/SCR2 ANODE
SCR3 ANODE/SCR4 CATHODE
