LG XA66, Manual

Page: 39 / 55

3-25 3-26
회로도
1. SMPS 회로도
⠞#ᑮᬞ⟪#OJ⢮⠺⠂#⠺⅚⟦ᤆ
Ḳᴿ⟊⹆⎆#ඪ൮ᴿඦ#㜶⅖#ຆ⢿♺#⠂㘞#ⵂᴶᓒ
OJ⢮⠺#⅖ᅞ❓
A
1
2
3
4
5
6
7
8
9
10
11
12
B C D E F G H I J K L M N O P Q R S T
SMPS
2011. 01. 20
Rev 1.1
VFDP VFDP
-VCC
+5V
GND
+5V
GND
+12V
GND
-12V
STBY STBY
+VCC
AGND
-VCC
F-
-24V
F+
-12V
+12V
+5V
+VCC F-
F+
F- F-
F+ F+
-24V -VEE
FGND GND +5V
STBY
VFDP
-VCC
+5V
+12V
+5V
+5V
HV300V
+12V
HV300V
AC1
VFPWR
F+
F-
AGND
+12V
-12V
-VCC
+VCC
VFPWR
-VEE
AGND
VCC
VCC
-VCC (7)
F- (3)
F+ (3)
-24V (3)
+12V (4)
-12V (4)
+5V (4)
+VCC (7)
STBY
STBY
VFDP
STBY (3)
VFDP (3)
TO MAIN
NC
TO Front board
Q902
8550
Q902
8550
2
1 3
L904
100uH/1A
L904
100uH/1A
LF901
35MH/2.5A
LF901
35MH/2.5A
1
1
2
2
3
3
4
4
C949
102P/250V
C949
102P/250V
C908
0.1uF C908
0.1uF
RW908
0R RW908
0R
D910
FR107 D910
FR107
+
C935
100uF/16V(nc)
+
C935
100uF/16V(nc)
CN902
TO MAIN
CN902
TO MAIN
1
2
3
4
5
6
7
R958
10K R958
10K
AC IN
CN901
AC IN
CN901
1
1
2
2
R932
NC R932
NC
C916
0.1uF C916
0.1uF
R956
4K7(nc) R956
4K7(nc)
R90
3
56K
R90
3
56K
Q911
8050 Q911
8050
2
1
3
R909
27K(NC) R909
27K(NC)
Q908
8050 Q908
8050
2
1
3
PC902
PC817 PC902
PC817
1
1
2
2
3
3
4
4
D911
FR107 D911
FR107
IC905
TL431 IC905
TL431
1
2
3
BD901
KBL406 BD901
KBL406
+
1
AC
2
AC
3
-
4
C923
0.1uF C923
0.1uF
R924
5K1 R924
5K1
+
C933
1000uF/35V
+
C933
1000uF/35V
R953
4K7(nc) R953
4K7(nc)
R920
10K R920
10K
R927
10K R927
10K
+
C929
1000uF/35V
+
C929
1000uF/35V
+
C926
10uF/50V
+
C926
10uF/50V
R946
10K R946
10K
+
C940
220uF/35V
+
C940
220uF/35V
R914
1K R914
1K
C911
101P/1KV
C911
101P/1KV
L903
100uH/1A
L903
100uH/1A
R943
1K R943
1K
T902
EI33 T902
EI33
1
1
2
2
3
3
6
6
7
7
14
14
13
13
12
12
11
11
10
10
9
9
8
8
5
5
4
4
D917 UF5404 D917 UF5404
D912
FR204 D912
FR204
ZD902
12V ZD902
12V
Q903
8550 Q903
8550
2
1 3
R957
2K R957
2K
D905
1N4007 D905
1N4007
1
2
R905
100K/2W
R905
100K/2W
R921
22R R921
22R
ZD905
9.1V ZD905
9.1V
R917
10K 1W
R917
10K 1W
ZD906
27V ZD906
27V
C913
0.1uF C913
0.1uF
C905
0.1uF
C905
0.1uF
R944
68K R944
68K
Q905
8550 Q905
8550
2
1 3
C909
0.1uF C909
0.1uF
ZD901
3.3V 1/2W ZD901
3.3V 1/2W
+
C941
470uF/25V
+
C941
470uF/25V
R933
10K R933
10K
C901
222P/1KV
C901
222P/1KV
+
C931
1000uF/35V
+
C931
1000uF/35V
C918
222P/1KV C918
222P/1KV
Q921
8050 Q921
8050
2
1
3
R901
1.5M 0.5W
R901
1.5M 0.5W
+
C936
220uF16V
+
C936
220uF16V
PC901
PC817 PC901
PC817
1
1
2
2
3
3
4
4
+
C954
47uF/50V
+
C954
47uF/50V
R936
330R R936
330R
+
C943
1000uF/16V
+
C943
1000uF/16V
R949
330R 1W R949
330R 1W
R939
0R R939
0R
R918
10K R918
10K
R942
22R R942
22R
+
C925
100uF/450V
+
C925
100uF/450V
D918 UF5404 D918 UF5404
Q909
8050(nc) Q909
8050(nc)
2
1
3
R937
1K(NC) R937
1K(NC)
C919
0.1uF C919
0.1uF
PWM
IC901
DM311
PWM
IC901
DM311
Vc
c
2
Vfb
3
nc
4
GND
1
Vs
tr
5
Drain
6
Drain
7
Drain
8
Q910
8550 Q910
8550
2
1 3
C921
0.1uF C921
0.1uF
CM902
0.1uF/275V
CM902
0.1uF/275V
R919
10K R919
10K
V
VR901
14D681K
V
VR901
14D681K
D914
SR360 D914
SR360
R968
5.6K R968
5.6K
R912
4R7 R912
4R7
R935
47K R935
47K
ZD904
9.1V ZD904
9.1V
R922 4.7R R922 4.7R
R940
9.1K R940
9.1K
C948
102P/250V
C948
102P/250V
R934
56R/2W R934
56R/2W
L905
20uH/3A
L905
20uH/3A
PWM
IC902
7M0880
PWM
IC902
7M0880
Drain
1
GND
2
VCC
3
FB
4
Start
5
C912
0.1uF C912
0.1uF
F901
T2.5AL250V
F901
T2.5AL250V
1
1
2
2
R904
10K 1/2W
R904
10K 1/2W
R941
22R R941
22R
D902
FR107 D902
FR107
R916
10K
R916
10K
+
C927
2.2uF/16V
+
C927
2.2uF/16V
Q904
8550
Q904
8550
2
1 3
C914
0.1uF C914
0.1uF
C932
473P C932
473P
R950
5K1 R950
5K1
R902
NC R902
NC
L906
20uH/3A
L906
20uH/3A
ć
RT901
5D-9
ć
RT901
5D-9
R948
5.1R(NC) R948
5.1R(NC)
IC903
TL431 IC903
TL431
1
2
3
R951
2K R951
2K
R947
4.7K R947
4.7K
FB904
FB
FB904
FB
PC903
PC817 PC903
PC817
1
1
2
2
3
3
4
4
+
C938
100uF/16V(NC)
+
C938
100uF/16V(NC)
D915 UF5404 D915 UF5404
Q912
8050(nc) Q912
8050(nc)
2
1
3
FB902
FB FB902
FB
Q941
8050 Q941
8050
2
1 3
R903
NC R903
NC
C917
0.1uF C917
0.1uF
C910
0.1uF C910
0.1uF
C904
222P/1KV
C904
222P/1KV
CM901
0.22uF/275V
CM901
0.22uF/275V
C906
0.1uF C906
0.1uF
R938
10K R938
10K
+
C945
1000uF/16V
+
C945
1000uF/16V
R954
2K(nc) R954
2K(nc)
C903
333P C903
333P
C922
472P(NC) C922
472P(NC)
+
C937
220uF/35V
+
C937
220uF/35V
C902
0.1uF
C902
0.1uF
R915
2K R915
2K
C915
222P/1KV C915
222P/1KV
C946
102P/250V
C946
102P/250V
D916 UF5404 D916 UF5404
C934
0.1uF C934
0.1uF
+
C960
47uF/50V
+
C960
47uF/50V
R907
22R R907
22R
+
C930
1000uF/35V
+
C930
1000uF/35V
+
C942
470uF/25V
+
C942
470uF/25V
R923
1K/1W R923
1K/1W
R910
56K/2W
R910
56K/2W
ZD907
3V3 ZD907
3V3
+
C939
220uF/35V
+
C939
220uF/35V
1
2
C947
102P/250V
C947
102P/250V
R955
2K(nc) R955
2K(nc)
R952
560R 1/2W
R952
560R 1/2W
Q901
8050
Q901
8050
2
1 3
CN904 CN904
1
2
3
T901
EEL19 T901
EEL19
10
10
9
9
8
8
CT1
CT1
7
7
6
6
5
5
4
4
3
3
2
2
1
1
CT2
CT2
R91
3
1K R91
3
1K
C950
0.1uF C950
0.1uF
ZD908
18V ZD908
18V
D909
FR107 D909
FR107
C920
0.1uF C920
0.1uF
CN903 CN903
1
1
2
2
3
3
4
4
5
5
6
6
ZD903
15V ZD903
15V
D907
UF4007 D907
UF4007
1
2
D906
1N4007 D906
1N4007
+
C968
100uF/16V(nc)
+
C968
100uF/16V(nc)
Q906
8050 Q906
8050
2
1
3
R925
330R 1W R925
330R 1W
Warning
Parts that are shaded are critical with
respect to risk of fire or electrical shock.
No Power
BD901 is Defective
+5V No Power
D914 is Defective
Switching Error
PC903,IC903 are Defective
Switching Error
PC901,IC905 are Defective
No Power
IC901 is Defective
AMP No Power
D902 is Defective
AMP No Power
D918,D915 are Defective
AMP No Power
D916,D917 are Defective
FL No Power
D909,D910 are Defective
-VEE No Power
D911 is Defective
+12V No Power
D912 is Defective
No Power
F901 is Defective
AMP No Power
IC902 is Defective
AMP No Power
Q941,PC902 are Defective
No Power
R907,D906 are Defective
중요한 안전 주의 사항
이 샤시를 사용할 때 어떠한 경우에도 LG사의 승인 없이 원본 설계를 수정 혹은
변경해서는 안 된다. 모든 구성품은 본래 회로에 있는 것과 동일한 유형의 것을
사용해서 교체해야만 한다. 특수 구성품은 식별하기 용이하도록 음영 처리를
해두었다. 이 회로도는 실제 사용되는 회로와 다른 경우도 있다. 세트에 대한
최근의 안전 및 성능 개선의 구현은 신규 서비스 책자가 발행될 때까지 지체되지는
않는다.
주 :
1. 음영 처리된 괄호( ) 속의 부품들은 안전에 필수적이다. 규정된 부품 번호에
따라서만 교체해야 한다.
2. 전압은 Play 모드에 있는 동안 디지털 전압계를 사용해서 DC 측정된다.