Led Driver - LG 34UM94 Service Manual

LEFT BAR LED DRIVER
(120mA/36V)
R2602
WLED_ENABLE 1K
Close to IC
R2604 C2600
C2602
100K 1000pF 1uF
C2603
50V
50V
1uF
25V
R2600
WLED_PDIM 33
R2601
A_DIM 68K
1%
C2601 R2605
R2603
68pF 6.8K
100K
50V
1%
R2606
16K
1%
RISET = 2480 / ILED
When ILED = 120mA,
RISET = 20.7K
JP2600 JP2601
P2600
12507WR-06L
Analog dimming
+5V +5V
R2632 R2633
1K
10K 1%
R2634
2K 1%
Q2602
R2635 C
WLED_ADIM 4.7K
B OPT
R2636
2K
1%
E
MMBT3904(NXP)
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.

LED DRIVER

Copyright © 2014 LG Electronics Inc. All rights reserved.
Only for training and service purposes
+19V
C2610
IC2600 C2606
100uF
DT1643S 1uF
[EP]GND
50V
50V
C2604
1uF
VIN VREF2 25V
1 16
VREF1 NDRV
2 15
EN CS
3 14
PDIM COMP
4 13
R2607 R2608
RISET RT 39K 1.5K
5 12 R2610
1.5K
LS1 OVP
6 11 C2607
0.47uF
LS2 LS4
7 10
LGND LS3
8 9
R2611 R2612
270K 270K
1% 1%
C2605
R2609
1000pF
36K
50V
1%
L2600
UBW2012-121F
C2608
1uF
50V
JP2602 JP2603 JP2604
C2609
1uF
50V
Left Bar
DEBUG
P2602
SMW200-10
A_DIM
C2628
1uF
10V
L2601 D2600
33uH SK510B_TSC
100V
R2618
WLED_ENABLE 1K
Q2600
D R2620 C2614
AOD478
100K 1000pF
50V
G
S
R2616
WLED_PDIM 33
R2615
0.1
R2617
1% 68K
A_DIM
1W 1%
C2611
4700pF
OPT
C2615
R2619
68pF
100K
50V
RISET = 2480 / ILED
When ILED = 120mA,
RISET = 20.7K
R2613
100K
C2612 C2613
33uF 33uF
100V 100V
R2614
100K
+19V
1
2
3
4
5
6
WLED_ENABLE
7
WLED_PDIM
8
WLED_ADIM
9
10
For UHD Test
RIGHT BAR LED DRIVER
(120mA/36V)
IC2601
DT1643S
[EP]GND
C2618
Close to IC
1uF
VIN VREF2 25V
1 16
C2616
1uF
C2617 VREF1 NDRV
50V
2 15
1uF
25V
EN CS
3 14
PDIM COMP
4 13
R2623
RISET RT 39K
5 12
LS1 OVP
6 11
R2621
6.8K
1%
LS2 LS4
7 10
LGND LS3
R2622
8 9
16K
1%
C2619
1000pF
L2602
UBW2012-121F
JP2605 JP2606 JP2607 JP2608 JP2609
Right Bar
P2601
12507WR-06L
34UM95
LED DRIVER
+19V
L2603 D2601
33uH SK510B_TSC
100V
C2620 C2624
100uF
1uF
50V
50V
Q2601
D
AOD478
G
S
R2631
0.1
1%
R2624 1W
1.5K
R2626
1.5K
C2625
4700pF
OPT
C2621
0.47uF
R2627 R2628
270K 270K
1% 1%
R2625
36K
50V
1%
C2622
R2629
1uF
100K
50V
C2626 C2627
33uF 33uF
R2630 100V 100V
C2623
1uF 100K
50V
2013.11.28
6 15
LGE Internal Use Only