LG CMS9540F Service Manual

3-2
ONE POINT REPAIR GUIDE
1. NO POWER
If the unit doesn’t work by no power problem, repair the set according to the following
guide.
1-1. FUSE / BRIDGE DIODE / THERMISTOR
1-1-1. Solution
Please check and replace F901, BD901, TH900, TH901 on SMPS board.
1-1-2. How to troubleshoot (Countermeasure)
1) Check if the fuse F901 is open or short-circuit.
2) Check if the bridge diode BD901 is short-circuit by over current with a digital multi meter.
3) Check if the NTC thermistor TH900, TH901 is normal or open.
1-1-3. Service hint (Any picture / Remark)
< F901 >
If F901 is not short-circuit,
replace it with a same
specifi cations one.
< TH900, TH901 >
If TH900, TH901 is open,
replace it with a new one.
< BD901 >
If BD901 is short-circuit,
replace it with a new one.
T12AH/250V
(12A 250V)
GND
GND
FH901
12
FH902
12
VR900
FNR-14K681T
C90
6
1uF
/550V
CM901
0.33uF/275V
CM902
0.33uF/275V
CM903
0.22uF/275V
PN901
GP390-02P-TS
LF901
2
0
9FL
H
m
8
2
25x15 HS906
@Opti
1
2
3
4
TP13 TP14
TP15
TP16
TP20TP12
C901
470pF/250VAC
C902
NC
C903
1000pF/250VAC
C909
1000pF/250VAC
R904
1M
R903
1M
R902
1M
R901
1M
R905
1M
R906
1M
R9E1
1M
R9E2
1M
R9E3
1M
F901
J902
1
2
J901
1
2
J903
1
2
J904
1
2
TH900
5ohm
TH901
5ohm
TH902
READY
BD901
D10XB60
1
2
3
4
!
!
!
600V/10A
!
R-PART:EBG61545701
R:EAE62524901
R:EAE62524901

LG CMS9540F Specifications

General

Brand	LG
Model	CMS9540F
Category	Stereo System
Language	English