LG LT-B2421CL / LT-B2421HL / LT-B2461CL / LT-B2461HL / LT-B2821CL / LT-B2821HL / LT-B2861CL / LT-B2861HL / LT-B3021CL / LT-B3021HL / LT-B3621CL / LT-B3621HL / LT-B3661CL / LT-B3661HL / LT-B3681CL / LT-B3681HL Service Manual ▷ View online
Schematic Diagram
–47–
–48–
7
6
5
4
8
2
3
4
8
1
(YL)
(BR)
(RED)
(BR)
(RED)
(YL)
(TMP87PP21F)
TMP87CH21F
WEELKY LCD MODULE
R11K
102
C11K
10K
DC 12V
R15K
R17K
R13K
10K
10K
R16K
10K
103
C13K
10K
DC 5V
10K
R12K
20
R14K
R18K
10K
DC 12V
CN-CC
CN-REMO
5V
5V
PRE AMP
GND
Vout
KRC104S
Q02K
5V
Q01K
KRA104S
S7
S3
R02F
47K
R04F
47K
S5
S1
S6
S2
R07F,1K
R01F,1K
R03F,1K
R05F,1K
R08F
R06F
47K
47K
S8
S4
DAN212K
D01F
DAN212K
DAN212K
D02F
KEY_DATA1
KEY_DATA0
KEY_DATA2
KEY_DATA3
KEY_SCAN0
KEY_SCAN1
Vcc
S15
S11
S13
S9
S14
S10
102
S16
S12
DAN212K
D03F
D04F
C05K
4.7K
R02K
D01K
DAN212K
KEY_SCAN2
KEY_SCAN3
KRC104S
Q03K
Q04K
KRA104S
102
C02K
C03K
102
12V
76
29
7
2
(TC2)P15
22
CSTCCX.XX
R01L,1K
R01A
R02A
3
4.7K
12.5V
4.7uF
C01A
SCI7701YBA
2
IC01A
1
+
1K
R02L,100
C01L
681
12.5V
OSC02B
R02B
(INT5/STOP)P20
(XTIN)P21
(XTOUT)P22
RESET
1M
VSS
1
VLC
NC
NC
NC
77
78
79
80
5
XIN
XOUT
4
3
2
3
2
TEST
8
7
6
7
6
(PPG)P14
(DVO)P13
(INT2/TC1)P12
(INT1)P11
(INT0)P10
(SO2)P47
(SI2)P56
(SCK2)P45
(SO1)P44
(SI1)P43
(SCK1)P42
(PWM/PDO)P41
(INT3/TC3)P40
KEY_DATA1
KEY_DATA0
KEY_SCAN4
KEY_SCAN3
KEY_SCAN2
KEY_SCAN1
KEY_SCAN0
KEY_DATA2
8
DU
VCC
1
S
15
14
13
12
14
13
12
10
11
9
20
19
18
17
16
19
18
17
16
21
OP1~OP7
Switch 2
5V
Slide
12
4
C3
Switch 1
Hight_hi
Hight_lo
Position_Main
Position_Remo
10K*2
RO2S
10K*2
RO1S
5
6
VSS
ORG
4
3
D
Q
C
Slide
RO4S
RO3S
24
23
23
P17
P16
28
27
26
25
P30
P31
P32
P33
Hight
Standard
Auto
2
1
4
3
C
Position
103
C01H
TH
XX*7
SEG29/P72
43
SEG19
A19
4
C01K
R03L,10K
4.7uF
C02L
+
102
A6
A1
COM0
COM2
COM3
COM1
A0
A5
A2
A3
A4
A7
R01K
1K
5V
SEG19
COM1
COM0
COM0
A19
COM1
1
3
2
SEG6
SEG1
71
COM0
COM1
COM2
COM3
SEG0
73
74
75
72
SEG2
SEG3
SEG4
SEG5
66
68
69
70
67
SEG7
64
65
SEG8
60
61
61
63
62
57
59
58
SEG12/P93
SEG11
SEG10
SEG9
SEG15/P90
SEG14/P91
SEG13/P92
50
53
54
54
56
55
51
52
52
SEG19/P64
SEG17/P66
SEG18/P65
SEG16/P67
SEG20/P63
SEG21/P62
SEG22/P61
47
49
48
44
46
45
SEG26/P75
SEG23/P60
SEG24/P77
SEG25/P76
SEG27/P74
SEG28/P73
SEG25
13
SEG24
SEG23
SEG22
SEG22
SEG21
SEG21
SEG20
SEG20
A22
9
A20
A20
A21
A21
A8
6
5
8
7
A22
A12
A11
A10
A9
A24
A26
A25
A15
A14
A13
10
12
11
COM0
COM3
COM2
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
COM0
18
A19
A28
A27
A18
A17
A16
A31
A30
A29
A22
A21
A20
15
14
17
16
COM2
COM0
A25
A24
A23
COM1
COM0
COM3
A29
A28
A27
A26
20
19
23
22
21
12.1KF/1%*8
R12H~R18H
C07D
VARF
34
33
32
31
30
39
38
37
36
35
P54(AIN4)
P34
P50(AIN0)
P51(AIN1)
P52(AIN2)
P53(AIN3)
1K
R19H
P55(AIN5)
P56(AIN6)
P57(AIN7)
VASS
104
40
42
41
SEG30/P71
SEG31/P70
VDD
5V
R11
4.7KF/1%
SEG5
SEG4
SEG2
SEG1
SEG3
SEG0
SEG6
COM3
COM1
COM2
A0
COM3
COM2
A31
A30
A2
A1
25
24
28
27
26
A5
A4
A3
A6
A7
31
30
29
33
32
SEG8
SEG7
SEG9
A10
A9
A8
36
35
34
38
37
40
39
CSTCC4.00MG
OSC01B
R01B
1M
C01B,C02B
S19
S17
S18
S20
D05F
KEY_SCAN4
KEY_SCAN3
42
43
41
44
45
SEG18
SEG10
SEG17
SEG11
SEG14
SEG12
SEG13
SEG15
SEG16
A23
A13
A12
A11
A14
A15
A18
A17
A16
CC_RX
CC_TX
WIRED_RX
WIRED_TX
IR_RECEIVE
5V
12V
L03K
GND
C04K
104
L02K
L01K
DC12V
SIGNAL
104
C12K
GND
13K
SIGNAL
DC12V
L12K
L11K
12V
R01U
10K
1K
R02U
12V
104
C03D
IC02D
GND
SCI7710YBA
IN
OUT
104
C05D
5V
C06D
100uF
10V
+
Exploded View and Replacement Parts List
1. Indoor Unit
–49–
130411
352118
35511A
354212
266012
330870
249951
268714
158591
263230
–58–
Parts List
• MODEL: LT-B2861HL
LOCATION NO.
PART NO.
DESCRIPTION
REMARKS
130411
3041A20001A
BASE ASSY, INDOOR
R
130911-1
3091A30001A
CABINET ASSY, INDOOR
R
130911-2
3091A30002A
CABINET ASSY, INDOOR
R
130911-3
3091A30003A
CABINET ASSY, INDOOR
R
135312
3531A10004B
GRILLE ASSY, FRONT
R
137213
3721A10001M
PANEL ASSY, SIDE
R
140570
4057AP4344A
LOCKER ASSY
R
146812
2H01102A
MOTOR ASSY, SYNC.
R
152302
5231AP2884A
FILTER(MECH), A/C
R
158591
5859A20001A
PUMP ASSY, WATER
R
249951
4995A20137D
CONTROL BOX ASSY, INDOOR
R
268714
6871A10008H
PWB(PCB) ASSY, MAIN
R
263230
6323AQ3226B
THERMISTOR ASSY
R
266012
6601A20001A
SWITCH ASSY, FLOAT
R
267110-1
6711A10002F
REMOTE CONTROLLER ASSY
R
267110-2
6711A20041B
REMOTE CONTROLLER ASSY
R(OPTION)
330870
3087AP1369A
DRAIN PAN ASSY
R
346810
4681A20006C
MOTOR ASSY, INDOOR
R
352118
5211A30020A
TUBE ASSY, MENIFOLD(INDOOR)
R
354212
5421A10013A
EVAPORATOR ASSY, FINAL
R
35511A
5211A30021A
TUBE ASSY, SUCTION INDOOR
R
359011
5901A10001B
FAN ASSY, TURBO
R
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