LG GR-L247ER Parts List And Instructions Manual page 21

EXPLATION FOR MICOM CIRCUIT
3, Door opening sensing circuit
<GR.L207ERA, GR-L247ERA> <GR-B207ERA, GR-B247ERA>
I("Ic0")I
rA. I°_ n
.. f RII3
..... H4
I I R47
ii b IK
..... R4 5
_....._DITtON S
MEASURING_
POINTS _-_
IC1 (No. 48 Pin)
IC1 (No. 51 Pin)
Bell sounds when button on
dosplay is pressed•
,£._, O.2s ,0.1_, O.4s ,
,v M" "i i"
OV -"-'4 L --4---
OV .63 kz (DING)_ .21 kz (DONG
Beep sounds when warning r_= I
door opening.
OV
0V 0V
,_GR*L207ERA, GR-L247ERA> <GR-B207ERA, GR-B247ERA>
Measuring part
Door of Freezing/Cold Storage Room --_
Closing
Opening
IC1 (MICOM) No. 47, 46 Pin
5 V (_) - (_), (_ - _). S/W at both ends ere at Off status)
5 V (_)- (_, (_) * _). S/W at both ends are at On status)
Since door switch sensing switch (A), (B) are a separate switch even if the door switch of the freezing room normally
operates, they may fail to sense door opening in the failure of switch at both ends of (A) and (B) or in failure of the L/wire.
Lamp does at the cold storage room not turn on if the door switch of the cold storage room fails to sense the door open
switch (c), (d) or the home bar switch.
- 36 °