Toshiba RAV-162BH-PE Service Manual page 66

9.3 12V power source circuit
Outdoor PC board produces full-wave rectification by
diode bridge (DB50) followed by the provision of tran-
sistor (Q50) produces DC power source (
9.4 5V watchdog timer circuit
Basically, the same description as the indoor PC board
applies, provided, however, that the reset circuit is not
added to the outdoor side.
9.5 Sensor circuit
This circuit detects the temperature by dividing voltage
with resistance and sensor and bringing the voltage value
into CPU, using the characteristics of the sensor that
resistance varies with different temperatures.
TE is for defrosting, while TL is for low ambient cooling
operation.
The following voltages are produced at each of the tem-
peratures.
0 0 C
TE 2.3V
TL 2.3V
When / are at GND or 5V, the sensors are either
open or short-circuited.
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A C 2 4 0 V
) at 12V.
25 0 C
3.8V
3.8V
-70-
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W a t c h d o g
timer output
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