Operational Principle Of Each Circuit; Power Circuit; Oscillation Circuit - Samsung RT40MA Service Manual

2. Operational Principle of Each Circuit

1. Power Circuit

Voltage
V12(DC 12V)
Vcc(DC 5V)
The decompressed AC voltage on the DC-TRANS secondary outputs around AC 16V to the both sides of the
'a' point. Then, DC 12V and 5V are supplied through the circuit and regular voltage IC REG1, REG2.

2. Oscillation Circuit

It oscillates generate clock for synchronizing the information transmission and reception of the internal
elements of MICOM and to calculate the time. If the specification of resonator is changed, it is not able to
operate normally because the trimming system of MICOM is altered.
Applied circuit
RELAY operation
Power around micom and detection part of sensor
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