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Electronic Theatre Controls Inc

ERP UI Cannot Turn Station Power Off

Symptoms/Issue

Station power is always on regardless of the setting in the ERP UI software.

Description/Explanation of Issue

If a power supply is powered on while the polarities are reversed a component that helps handle the station power switching fails.

Fix/Solution

1. Check Q3 for a short between the emitter and the collector.erp1.png

2. If there is a short, replace the component with ETC part number Q9056-F (40V 3A PNP transistor).

 

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