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CIRCUIT DESCRIPTION
12-1) POWER
Terminal Oscillation Frequency
● Vcc(DC 5V)
<< BLDC
+12V(DC 12V)
MICOM POWER AND SENSORS
BLDC MOTOR POWER(NOT USE)
RELAY,PANEL POWER
● When turned on, rectified AC voltage which is stepped down on 2nd transformer flows between ① and ③
at about AC 15V, goes through the diode D101 and D104 is changed to DC, and provide constant 12V.
It provides 5V to MICOM and other circuits via regulator REG102 (MC7805ACT), and make entire PCB
operate.
● When the power is applied,currents will be rectified via B and DC360V will be generated at the both terminals of
the capacitor (C001). The Top-Switch (TNY268P)will be automatically switched to the optimum state according
to the secondary load conditions. When currents flow between Top-S/W D and S (5PIN~7PIN),there will be
currents generated i n the TRANS and the currents i nduced to the TRANS upon power off between D and S
will be transferred to the secondary.By repeating the above process, 12V will be maintained at the secondary
C108 and it will be supplied to the display relay. Also, 5V will be generated at the C110 and it will be supplied to
the sensor and operate the main PCB.
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