Electronic Parts - LG FM15AH UL3 Svc Manual

6. Electronic Parts

6.1 The Product doesn t operate at all
Turn off the main power and
wait for 10 seconds.
Turn on the main power again.
A "Beeping" sound is made
from the indoor unit
No
Check the voltage of power supply (AC220V/AC240V, 50Hz) and check
for the following :
* The voltage of main power supply.
* The voltage applied to the unit.
* The connecting method of Indoor/Outdoor connecting cable (each color)
* The P.C.B. Assembly (Fuse, Noise Filter, Power Module, Bridge Diode, etc.)
The operation check of the Indoor P.C.B. Ass'y
Procedure
1) The input voltage of power mod-
ule.
2) The output voltage of power mod-
ule.
4) IC04D(7805)
5) IC01A(KIA7036)
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Primarily, the operating condition of
Micom is O.K.
Yes
* Check, Remote controller & Receiver.
* Check CN-DISP1, CN-DISP2
indoor PCB
Specification
1) AC230V ± 30V
: Check the rated voltage
2) 12V ± 3V
4) DC5V
5) The voltage of micom pin 19
: DC4.5V↑
- 67 -
5. Trouble Shooting
of
Remedy
1) Check the power outlet.
2) Replace
P.C.B Ass'y
4) Replace P.C.B Ass'y
5) Replace P.C.B Ass'y
LGE Internal Use Only