Pcb Explanation - LG LTN16385PL Service Manual

7-2 EXPLANATION FOR THE PCB CIRCUIT
Electronic control (LED)
7-2-1 Energy Circuit
The voltage of each of the parts is as follows:
The secondary winding of the transformer provides power to the display circuitry, and circuitry to handle the relay (12Vdc)
and the circuit of the micro controller (MICOM) (5Vdc).
CAUTION: Because the high voltage (160Vdc) remains at the terminal of the power, wait at least 3 min after unplugging the
application to check the voltages to allow the current dissipates.
PART
VOLTAGE
CON1
TRANS
1N4007*4
7
VA1
CE1
INR
1000uF
14D331
/35V
5
VA1
115 V.c.a.
127 V.c.a.
220 V.c.a.
Remark: VA1 ranging is in function to the voltage
of each country.
- 23 -
IC2 D5 IC3
7812 7805
IN4007
+ +
+
CE2 CE3 CC1 CC2
680uF 470uF
223 223
/25V /25V
CE2
12 Vd.c. 5 Vd.c
The highlight are the components of the
power source switch.
M I C O M
(IC1)
28
Vdd(Varef)
+
CE4 CC3
220uF
104
/16V
14
Vss
(Vass)
3
TEST
CE