One Point Repair Guide; Power - LG DM5360K Service Manual

LF901
1. NO POWER
UM-007/UF16-45/14mH
If the unit doesn't work by no power problem, repair the set according to the following guide.
1-1. FUSE & BRIDGE DIODE
1-1-1. Solution
Please check and replace F900, BD900 or TH900 on SMPS board.
1-1-2. How to troubleshoot (Countermeasure)
1) Check if the fuse F900 is open or short-circuit.
2) Check if the bridge diode BD900 is short-circuit by over current with a digital multi meter.
3) Check if the NTC thermistor TH900 is normal or open.
mH
H
VR900
1 2
10D471K
F900 F900
VH-3Y
PN900
L N
AC i n 110~240V
1-1-3. Service hint (Any picture/ Remark)
< F900 >
If F900 is not short-circuit,
replace it with a same
specifi cations one.

ONE POINT REPAIR GUIDE

TH900 TH900
2
BD900 BD900
LF901
UM-007/UF16-45/14mH
< BD900 >
If BD900 is short-circuit,
replace it with a new one.
TH900
5D-9
BD900
KB406
3
CM901
0.1uF/275V
3-2
HVCC
IN4007
D910
+
C905
22uF/450V
IC904
DRAIN
7
GND
6
OB2338
DRAIN
5
PWM
1
VFB
4
SENSE
GND_EARTH
R911 0R
< TH900 >
If TH900 is open,
replace it with a new one.