Operation Principles By Parts Of Circuit; Power; Oscillation Circuit - Samsung RS2511 Series Service Manual

5. OPERATION PRINCIPLES BY PARTS OF CIRCUIT

5-1) POWER

Terminal
● Vcc(DC 5V)
<< BLDC
+12V(DC 12V)
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.

5-2) OSCILLATION CIRCUIT

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)
Oscillation Frequency
MICOM POWER AND SENSORS
BLDC MOTOR POWER(NOT USE)
RELAY,PANEL POWER
16
Terminal Oscillation Frequency
Xin(#19) 8.0MHz
Xout(#18) 8.0MHz