LG LS-C126U_M0 / LS-H126U_M0 Service Manual ▷ View online
-53-
Turn off Main Power
• Check the electrical wiring diagram of outdoor side.
• Check the abnormal condition for the component of Compressor/Out-
• Check the abnormal condition for the component of Compressor/Out-
door Fan Motor, 4 way.
• Check the "open" or "short" of connecting wires between indoor and
outdoor.
-54-
Electronic Control Device
(1) MAIN P.W.B ASSEMBLY (AC PART)
• TOP VIEW
800V
PWB ASM: 6871A10043
PWB: 6870A90177A
(1) MAIN P.W.B ASM (AC)
• BOTTOM VIEW
-55-
(2) DISPLAY ASSEMBLY
Schematic Diagram
36
13
23
17
15
16
14
20
19
19
18
21
22
29
26
24
25
27
28
32
30
31.
33
34
35
58
11
9
10
12
6
7
5
4
8
64
1
2
3
61
63
62
60
59
41
38
40
39
37
43
44
45
42
52
55
57
56
54
53
49
51
50
48
47
46
IC01M
R02F
20K
20K
R02P
KID65004AF
220
10V SD
C10D
+
103
50V
C08D
BZX55C11
C06D
25V SD
C07D
104
50V
330
20K
R02D
ZD02D
1
3
AC PART
5V
1
CN-12V
2
CN-CONT
1
2
HVB
2
1
3
IC04D
78L05BP
7805
O
I
12V
L4 100nH
20K 2012
R11H~R14H
2
1
CN-HVB(BL)
3
SDA
OJ1H
R13H
R11H
R12H
5V
R14H
4
A0
EEPROM
OJ2H
OJ3H
5
SCL
WP
Vcc
1
2
G
A2
3
A1
8
7
6
20K
R01P
1
RD
Sub Part
3
4
PK
YL
OR
2
5
BL
1
HVB OUT
9
INDOOR FAN
3
4
2
CN-U/D(WH)
5
COMP
3.6V
KIA7036P
RESET
CN-TH1(WH)
D07D
SD01D
IC01D
TNY266P
STO2D-200
UG2D
472M 3KV
DC LOW
IC02D
TLP421(BL)
C05D
4
6
1/8W 2012
39
R03D
470/35V/SD
C04D
+
S
104
C02D
BP
EN
D
5
4
1
2
IC03D
TLP421 BL
15uF
450V/SD
C01D
+
INT
1/8W 2012
4
3
2
1
27k
R04D
5V
1/4W
1N4148
D02D
300K
R05D
O/L
OR3H
SMPS
OJ4H
5V
5V
OR5H
OR6H
Hi
Med
OR4H
Low
1
d
V
A
d
s
s
V
A
AVref
AVdd
NTC SCK-102
D05D
1N4007
R05H
OR1H
F1
OR2H
F2
R25H
R26H
R24H
R21H
5V
0.01
50V
C01A
R21H~R26H
12.1K, 1%
R22H
R23H
5V
2
10K
12.1K
R02H
6.2K
1%
R04H
1%
5V
15mH/1A
NF01J
1/4W 3216
R06D
300K
BD01D~04D
1N4007
47nM/275V/435D
C03J
100nF/275V/436D
METAL FILM
METAL FILM
C02J
250V/T2A
100nM/275V/436D
METAL FILM
C01J
FUSE
TVR10561
ZNR01J
CN-TAB1
N
1
1
T-BLOCK
RY-COMP
G4A-1A-E-LG
4
3
2
1
2
1
INDOOR FAN
12V
ROOM-TH
PIPE-TH
2
1
1
3
2
3
44
680
R03J
1/2W
TRAICS
SM1L43
100,1/2W
R01J
120, 1/2W
R02J
TR01J
T1
1/4W
R04J 560
ZNR02J
TVR10561
TLP762JF
IC01J
1
2
3
5
4
3
3
2
1
2
1
CN-MOTOR
FAN
INDOOR
MOTOR
KID65004AF
1
UPD780023AGC-C
Vss0
5V
Vdd0
8
NEC
X2
Vss1
X1
INT0
INT1
BL
2
3
4
6
5
7
11
4WAY
FAN
14
15
16
2
1
13
12
5
6
4
3
IC02M
10
9
7
8
12V
OR
YL
RD
PK
4
4
2
2
3
3
1
1
5
5
CN-L/R(BL)
CSTS0800MG03-T2
R02A,20K
1M
5V
R01B
CRTL8.00MSOT
OSC01B
3
1
Q01C
2SC5343
KTC3198-Y
5V
INT
5V
IC01A
12K
R07D
56K
R08D
AC220~240V
50/60Hz
SH-CAPACITOR
2012
2012
T2
VOLTAGE GND
DC HIGH
VOLTAGE GND
DC HIGH
VOLTAGE GND
DC HIGH
VOLTAGE GND
DC LOW
VOLTAGE GND
KID65004AF
IC01G
3
2
8
1
9
5
6
4
7
RD
OR
YL
BL
PK
3
3
2
2
11
CN-SUC(WH)
5
5
4
4
1
2
2
3
1
4
12V
R06V
220
R05V
10K
VFD DISPLAY
KTB 1151-Y
Q01V
STEPPING MOTOR
(UP/DOWN)
SUCTION 1
STEPPING MOTOR
STEPPING MOTOR
SUCTION 2
12V
12V
12V
SW PWB ASM
BZ
YL
OR
PK
22
33
44
55
3
3
RD
OR
BL
2
2
11
YL
BL
PK
5
5
4
4
RD
1
1
12V
11
2
33
2
7
5
6
8
9
5
7
6
5V
CN-VFD(WH)
C01F
50V
0.01
1K
R01F
C01L
50V
681
R02L,1K
C03~04V
0.01
50V
R01L
5.1K
2(N)
1(L)
COMPRESSOR
OUTDOOR
FAN MOTOR
RY-4WAY
RY-FAN
R03T
1K
102
C03T
Q01T
5V
A104S
Q04T
C104S
102
C02T
Q06T
A104S
Q03T
C104S
5V
CN-TEL
D01T
5V
1N4148
C01T
104
2
3
1
2
3
1
100
KRC107S
KRA107S
R02E
910
R03E
220
BZ01E
C01E
100/25V
+
PKM17EPP-2002
12V
Q02E
KRC107S
Q01E
Q03E
R01E
BZ FREQ
Bz
Bz
o2
5V
8
R04V,1K
R03V,1K
2
2
3
3
11
55
44
1
1
L
RY-O2
CN-TAB2
8
7
6
5
4
2
3
1
12V
HVB OUT
2
1
3
2
1
3
12V
E2 1K
E3 1K
5V
Vout
Vout
ZBF503D
L1
SMD 2012
44
4
4
3
3
2
2
1
1
22
33
44
11
77
6
6
11
10
C01Z
0.01
C02Z
0.01
5
11
10
9
8
7
6
Q02V
KRA107S
C07V
104
10V SD
220
C09D
+
5
4
5
4
OPTION
66
JP11,330
-56-
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