Samsung DA99-00926B Specifications download pdf (Page 47)

OPERATION PRINCIPLES BY PARTS OF CIRCUIT

Power

Vcc(DC 5V)

+12V(DC 12V)

Circuit

MICOM POWER AND SENSORS

RELAY,PANEL DRIVING CIRCUIT

1) When the power is supplied,AC voltage stepped down on the 2nd transformer flows between and

at about AC 16V and changes to DC voltage when it goes through the diode D101 and D108,and

constant 12V will be output via regulator REG1(7812).And,it will supply DC5V to MICOM and power

to other circuits via regulator REG2 (MC7805ACT),and make entire PCB operate.

1) It is an Oscillation Circuit for synchronism clock generation and time calculation on the information

sending &receiving of the MICOM internal logic elements and when specifications for Resonator

change,the timing system of MICOM changes resulting in errors. (Rated parts must be used)

Terminal

Xin(#19)

Xout(#18)

Oscillation Freq.

8MHz

12-1) SOURCE POWER CIRCUIT

12-2) OSCILLATION CIRCUIT

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 88 89

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Samsung DA99-00926B Specifications Page 47