LG GR-L247ER Parts List And Instructions Manual page 16

EXPLATION FOR MICOM CIRCUIT
1. Explanation for PWB circuit
1-1. Power circuit
1. GR-L207ERA, GR-L247ERA, GR-B207ERA, GR-B247ERA
Power circuit consists of SMPS (SWITCHING MODE POWER SUPPLY) power. The SMPS consist of the rectifying part
(BD1, CE1) converting AC voltage to DC voltage, the switching part (IC2) switching the converted DC voltage, transformer
transferring energy of the pdmary side of the switching terminal to the secondary side and the feedback part (IC3, IC4)
transferring it to the primary side.
Caution : Since high voltage (DC310V) is maintained at the power terminal, please take a measure after more than 3
minutes have passed after removing power cords in the abnormal operation of a circuit.
Voltage of every part is as follows:
Voltage [ r 1220 Vac /inspection Vdc 16 Vdc 12 Vdc 15.5 Vdc 5 Vdc
B4}1
R'_B-I_O 6
CONI[j_
= - ['----110 m3_
.
_ 2
--_ T= _. : Illi=_1/ ,.._;;=. _ '_
- I = - _, Sl + cev
i +
J_:_ "_ It!j,j I [" 1
;,___ L-- _
ICl
(MICOM)
_ref
_ST
_D
-31 -