LG 31MU97 Service Manual page 22
Ips led monitor
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Also See for 31MU97:
- Owner's manual (39 pages) ,
- Function manual (12 pages) ,
- Manuals on using product functions (12 pages)
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MAIN SCALER POWER
+19V
IC702
MP2315GJ
R710
100K
R702
47K
AAM
FB
1
8
IN
VCC
2
7
3A
SW
EN/SYNC
3
6
C702
C705
10uF
0.1uF
25V
50V
GND
BST
2014.6.24
4
5
R711
Derating issue
20K
1005->1608
R705
68
C709
0.1uF
50V
OPT
R750
100K
IC706
MP2315GJ
2014.06.03
R748
47K
AAM
FB
LED driver noise
1
8
L721
CB2012PK501T
IN
VCC
2
7
3A
Close to IC
SW
EN/SYNC
C706
C743
3
6
10uF
0.1uF
25V
50V
GND
BST
OPT
4
5
2014.6.24
R751
Derating issue
20K
1005->1608
R749
68
C744
0.1uF
50V
+1.8V_PD_ENABLE
IC700
MP2315GJ
R706
10K
R700
47K
AAM
FB
1
8
IN
VCC
2
7
3A
SW
EN/SYNC
3
6
C700
C703
10uF
0.1uF
25V
50V
OPT
GND
BST
4
5
2014.6.24
R707
Derating issue
10K
1005->1608
R703
68
C707
0.1uF
50V
IC701
MP2315GJ
R708
100K
R701
47K
AAM
FB
1
8
IN
VCC
2
7
3A
SW
EN/SYNC
3
6
C701
C704
10uF
0.1uF
25V
50V
GND
BST
4
5
R709
2014.6.24
20K
Derating issue
1005->1608
R704
68
C708
0.1uF
50V
THE
SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE
SYMBOL MARK OF THE SCHEMETIC.
Copyright © 2014 LG Electronics Inc. All rights reserved.
Only for training and service purposes
+3.3V
+3.3V_SCALER
2014.05.27
10uH->4.7uH
MPS recommend
L702
4.7uH
R721
47K
1%
C712
R722
C715
C718
C721
0.1uF
16V
1.5K
0.1uF
10uF
10uF
ZD700
5V
10V
10V
R714
1%
16V
33K
R723
15K
1%
R756
10K
MULTI_ON
+3.3V_SCALER_2
2014.05.27
10uH->4.7uH
MPS recommend
L715
4.7uH
R753
47K
1%
C745
R754
C746
0.1uF
C747
C748
1.5K
0.1uF
10uF
10uF
16V
ZD703
10V
10V
5V
R752
16V
1%
33K
R755
15K
1%
Scaler & DDR
+1.8V_SCALER
2014.05.27
10uH->4.7uH
MPS recommend
L700
4.7uH
DC DC output Voltage : 1.92V
R715
18K
1%
C710
R716
C713
C716
C719
0.1uF
16V
3K
0.1uF
10uF
10uF
ZD701
10V
10V
R712
1%
16V
5V
56K
R717
15K
1%
Changed R716 resistor value(2k --> 3k)
+1.2V_SCALER
Setting: 1.328V(=0.8(1+6.6K/10K)
2014.05.27
10uH->4.7uH
MPS recommend
L701
4.7uH
R718
3.3K
1%
C711
0.1uF
R719
C714
C717
C720
16V
3.3K
0.1uF
10uF
10uF
ZD702
10V
10V
R713
1%
16V
5V
75K
R720
10K
1%
Because 1.2V domain IR drop is too big,
changed R719 resistor value(2k --> 3k)
+19V
PANEL_ON
2014.05.26
IC705
47K->62K
MP2315GJ
MPS recommend
R734
10K
R726
62K
AAM
FB
1
8
IN
VCC
2
7
3A
SW
EN/SYNC
3
6
C724
C727
10uF
0.1uF
25V
50V
GND
BST
C733
4
5
R735
2014.6.24
0.1uF
100K
Derating issue
16V
R729
1005->1608
68
2014.06.24
Abnormal on at AC on
C730
0.1uF
50V
IC703
MP2315GJ
R730
100K
R724
47K
AAM
FB
1
8
IN
VCC
2
7
3A
SW
EN/SYNC
3
6
C725
C722
10uF
0.1uF
25V
50V
GND
BST
C731
4
5
R731
2014.6.24
0.1uF
Derating issue
20K
16V
1005->1608
R727
68
C728
0.1uF
50V
MULTI_ON
IC704
MP2315GJ
R732
10K
R725
47K
AAM
FB
1
8
IN
VCC
2
7
3A
SW
EN/SYNC
3
6
C726
C723
10uF
0.1uF
25V
50V
GND
BST
C732
4
5
R733
2014.6.24
0.1uF
Derating issue
2K
16V
OPT
1005->1608
R728
68
C729
0.1uF
50V
OPT
R759
R765
100K
10K
IC707
MP2315GJ
2014.06.03
R757
47K
AAM
FB
LED driver noise
1
8
L720
CB2012PK501T
IN
VCC
2
7
3A
Close to IC
SW
EN/SYNC
C749
C750
3
6
10uF
0.1uF
25V
50V
OPT
C752
GND
BST
R760
2014.6.24
4
5
0.1uF
20K
Derating issue
16V
1005->1608
R758
68
C751
0.1uF
50V
Because 1.2V domain IR drop is too big,
changed R719 resistor value(2k --> 3k)
+10V_Panel
L709
10uH
2014.06.12
R745
15K->22K
22K
1%
C736
C739
C742
R746
0.1uF
10uF
10uF
R738
100K
16V
25V
25V
33K
1%
R747
10K
1%
+5V
L707
10uH
YAW396-02MB
R739
33K
1%
R740
C734
C737
C740
47K
0.1uF
10uF
10uF
R736
16V
10V
10V
1%
33K
R741
15K
1%
DS-110A
+3.3V_AMP
+3.3V_UART
2014.05.27
10uH->4.7uH
MPS recommend
L708
4.7uH
R742
47K
1%
R743
C735
C738
C741
1.5K
0.1uF
10uF
10uF
ZD704
R737
16V
10V
10V
5V
1%
33K
R744
15K
1%
MULTI_ON
+1.2V_SCALER_2
Setting: 1.328V(=0.8(1+6.6K/10K)
2014.05.27
10uH->4.7uH
MPS recommend
L704
4.7uH
2014.06.06
R762
To reduce LED driver noise
3.3K
Close to ZD705
1%
OPT
R763
C753
C754
C755
C761
0.1uF
3.3K
10uF
10uF
ZD705
1uF
16V
10V
10V
R761
1%
5V
10V
75K
R764
10K
1%
UHD MODEL
MAIN POWER
+19V
L713
CIS21J121
5A
140Watt PSU
L718
18P
CIS21J121
JP701
+19V
+19V
1
2
5A
+19V
+19V
3
4
+19V
+19V
5
6
OPT
OPT
+19V
+19V
C756
C757
7
8
C758
0.1uF
68uF
GND
GND
1uF
9
10
50V
35V
GND
GND
11
12
105C
GND
GND
13
14
JP700
GND
GND
15
16
NC
NC
17
18
19
SMAW200-H18S5
P700
+19V
OPT
L712
OPT
CIS21J121
5A
P701
OPT
L719
CIS21J121
5A
1
JP704
OPT
OPT
2
C759
C760
0.1uF
68uF
50V
35V
105C
OPT
JK700
TERMINAL
3
JP703
FIX_TER
2
SPRING_TER
1
JP702
2014.2.14
7
18
LGE Internal Use Only
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