Panasonic TC-P50X1, TC-P42S1, TC-P50S1, TC-P46S1, TC-P42X1 manual System MPU SOS Detect, Slide #39

Models: TC-P42X1 TC-P46S1 TC-P50S1 TC-P42S1 TC-P50X1

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System MPU SOS Detect

System MPU SOS Detect

10 Blinks SOS: IC5401 generates the SUB9V, IC5607 generates the SUB5V, and IC5480 generates the BT30V. The SUB9V, BT30V, and SUB5V from these ICs are monitored by IC1100. Any abnormality on these voltages (Including the F_STB15V), triggers the shutdown circuit and the MPU shuts down the unit. The power LED blinks 10 times.

11 Blinks SOS: The ventilation fans are monitored for proper operation. If one of the fans opens or increases resistance, the resulting current change is applied to pin 36 of the main CPU (IC1100). This triggers the Fan SOS and the TV shuts down. The power LED blinks 11 times.

12 Blinks SOS: The operation of the audio power amplifier IC2109 is monitored. If the audio output circuit develops a short to ground, a high is output to pin 37 of the MPU (IC1100), triggering a SOS condition. The power LED blinks 12 times.

13 Blinks SOS: When the TV is turned on, a system check is performed through the IIC0 bus line.

The system MPU and IC8001 (Seine 3LV) communicates and if an abnormality is detected, the TV shuts down and the power LED blinks 13 times.

Slide #39

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Panasonic TC-P50X1, TC-P42S1, TC-P50S1, TC-P46S1, TC-P42X1 manual System MPU SOS Detect, Slide #39