DOWNLOAD LG 39LN51XX / 39LN5100 / 39LN5110 / 39LN5120 (CHASSIS:LB35B) Service Manual ↓ Size: 6 MB | Pages: 58 in PDF or view online for FREE

Model
39LN51XX 39LN5100 39LN5110 39LN5120 (CHASSIS:LB35B)
Pages
58
Size
6 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
39ln51xx-39ln5100-39ln5110-39ln5120-chassis-lb35b.pdf
Date

LG 39LN51XX / 39LN5100 / 39LN5110 / 39LN5120 (CHASSIS:LB35B) Service Manual ▷ View online

THERMAL
THE    SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE    SYMBOL MARK OF THE SCHEMETIC.
POWER
PWM_DIM
+3.5V_ST
+3.5V_ST
R714
1K
R729
1K
+1.2V_VDDC
C744
0.1uF
16V
+3.5V_ST
C761
0.1uF
16V
C742
10uF
6.3V
C745
10uF
6.3V
+1.8V_M
R710
100
R742
1
C752
0.1uF
16V
0.1uF
C702
16V
PANEL_VCC
C707
0.1uF
50V
PANEL_ON
R747
10K
INV_ON
R749
2.2K
POWER_SW
+24V_AMP
+3.3V_M
P_12V
Q720
AO3407A
G
D
S
C741
0.1uF
16V
+3.3V_M
L750
BLM18PG121SN1D
Q721
MMBT3904(NXP)
E
B
C
RL_ON
R744
10K
P_12V
+3.5V_ST
C750
0.1uF
16V
+3.3V_M
IC701
MP20051
3
FB
2
OUT_2
4
GND
1
OUT_1
5
EN
6
NC
7
IN_1
8
IN_2
9
[EP]GND
R766
4.7K
OPT
C743
10uF
6.3V
C740
10uF
6.3V
C754
10uF
6.3V
Q722
MMBT3906(NXP) 
E
B
C
Q710
AO3435
G
D
S
R762
5.6K
R761
33K
Q711
MMBT3904(NXP)
E
B
C
C777
10uF
10V
OPT
P_12V
+3.3V_M
C773
0.1uF
16V
R771
33
IC709
MP1497DJ
3
SW
2
IN
4
GND
1
SS
5
BST
6
EN
7
VCC
8
FB
C775
0.1uF
16V
C774
0.1uF
R778
47K
C771
1uF
25V
R777
100K
C770
10uF
16V
0.1uF
C705
16V
C772
0.1uF
16V
L771
6.8uH
NR8040T4R7N
R770
43K
1%
R772
8.2K
1%
R765
3.3K
+5V_USB
C776
22uF
10V
L701
120
L702
120
L703
120
L770
120
L761
120
R748
33K
R740
2.7K
1%
R741
4.7K
1%
IC711
AP1117E18G-13 
2
OUT
3
IN
1
ADJ/GND
+3.5V_ST
R716
10K
R715
10K
Q703
MMBT3904(NXP)
E
B
C
P701
SMAW200-H18S1
14
12V
9
24V
4
P-DIM
18
GND
13
12V
8
GND
3
3.5V
17
GND
12
GND
7
GND
2
DRV_ON
16
NC
11
GND
6
P-DIM2
1
PWR_ON
15
12V
10
24V
5
3.5V
19
.
C760
4.7uF
16V
R750
10K
READY
JP708
JP709
JP710
JP711
C753
4.7uF
10V
ZD701
20V
READY
ZD702
SD05
7  7
POWER
LB35B/LC35B/LL35B
32LN5100
2012/11/15
EAX65027101
** Switch Panel-Vcc
R1
** +3.5V_ST -> 3.3V_M
R2
** 3.5V_ST -> 1.26V VDDC
OUT:1.26V
FROM LIPS & POWER B/D
V0 = 0.8*(1+(R2/R1))
** 3.3V_M -> 1.8V_M
3A
OUT:5V
**12V->USB 5V
Closed IC709
R2
Closed IC709
R1
V0 = 0.8*(1+(R1/R2))
** Jig Point_GND
1 / 36 
Normal  
audio 
Move to No 
video/No audio 
No video 
Normal audio 
Check Back Light 
On with naked eye 
On 
Check Power Board 
24v, 12v,3.5v  etc. 
Normal  
voltage 
Replace T-con Board 
or module 
Repair Power Board 
or parts 
Check Power Board 93.2~118.5V
 
v output 
Normal 
voltage 
Replace Inverter 
or module 
Repair Power 
Board or parts 
End 
Always check & record S/W Version and White 
Balance value before replacing the Main Board 
Replace Main Board  
 Re-enter White Balance value 
Precaution 
Established 
date  
Standard Repair Process 
Revised date  
1/14 
LCD  TV 
Error 
symptom 
A. Video error
 
No video/ Normal audio  
A4 
A1 
A2 
A6 & A3 
First of all, Check whether all of cables between board is inserted properly or not. 
(Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,) 
2013. 01 .24 
2 / 36 
Normal 
 voltage? 
Check various voltages 
of Power Board 
( 3.5V,12V,20V or 24V…)
 
No Video/ 
No audio 
Check and 
replace 
MAIN B/D 
Replace Power 
Board and repair 
parts 
End 
Standard Repair Process 
A. Video error
 
 No video/ No audio  
A4 
Established 
date  
Revised date  
2/14 
LCD  TV 
Error 
symptom 
2013. 01 .24 
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