Panasonic gp8du gph8du th-37px50u th-42pd50u th-42px50u th-42px500u th-50px50u th-50px500u troubleshooting Service Manual
Short Circuit Detection of Sub-voltage (10 Blinks)
Figure 41
The transistor Q5641 monitors the F_STB14V, SUB3.3V, SUB9V-1, BT30V and SUB5V
lines. If any of these supply lines develop a short circuit, transistor Q5641 goes into
conduction and applies a high to pin 111 of the MPU, IC4005, triggering an SOS
condition.
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