Casio PCR-365A - 5 Circuit Explanation; Power Supply Circuit

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Q1: Power transistor
Q2: Voltage detection transistor
Voltage level at above check point (unit: V )
Measurement
position
ABCD
Voltage (V) 12.5V 5.3V 6.2V 2.47V
5. CIRCUIT EXPLANATION
5-1. Power supply circuit
A C
B
D