Panasonic TH-42PX500U - Short Circuit Detection of Main Voltage (10 Blinks)

Short Circuit Detection of Main Voltage (10 Blinks)
Figure 40
The transistor Q5642 monitors the MAIN_9V, MAIN_2.5V, and MAIN_5V lines. If any of
these supply lines develop a short circuit, transistor Q5642 goes into conduction and
applies a high to pin 111 of the MPU, IC4005, triggering an SOS condition.
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