DOWNLOAD LG 22LS3500 / 22LS3700 (CHASSIS:LB21A) Service Manual ↓ Size: 4.22 MB | Pages: 40 in PDF or view online for FREE

Model
22LS3500 22LS3700 (CHASSIS:LB21A)
Pages
40
Size
4.22 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
22ls3500-22ls3700-chassis-lb21a.pdf
Date

LG 22LS3500 / 22LS3700 (CHASSIS:LB21A) Service Manual ▷ View online

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.
2011/08/17
IR/CONTROL_W/O_IR_OUT
23
GP4L_S7LR2
JP2407
SENSOR_SCL
SENSOR_SDA
L2403
BLM18PG121SN1D
C2408
18pF
50V
OPT
C2402
0.1uF
R2401
100
C2407
100pF
50V
KEY2
C2410
0.1uF
16V
OPT
JP2409
+3.5V_ST
+3.5V_ST
C2409
18pF
50V
OPT
LED_R/BUZZ
C2403
0.1uF
16V
R2402
100
JP2408
R2412
100
C2401
0.1uF
R2413
1.5K
R2411
100
L2402
BLM18PG121SN1D
JP2410
KEY1
C2404
1000pF
50V
L2401
BLM18PG121SN1D
IR
P2400
12507WR-10L
1
2
3
4
5
6
7
8
9
10
11
R2404
10K
1%
R2405
10K
1%
+3.5V_ST
D2401
5.6V
AMOTECH CO., LTD.
OPT
D2402
5.6V
AMOTECH CO., LTD.
OPT
D2404
5.48VTO5.76V 
D2405
5.48VTO5.76V 
D2403
5.48VTO5.76V 
IR_OUT
LED_B/LG_LOGO
R2426
3.3K
IR/LED and control for on.y ’12 sub without IR-OUT.
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.
SMALL_TN_LED_DRIVER
2011/08/19
29
GP4L_S7LR2
C10012
2.2uF
100V
LED_DRIVER
C10015
1000pF
50V
LED_DRIVER
WLED_ENABLE
C10007
0.33uF
50V
LED_DRIVER
R10011
47K
1/10W
1%
AUO_CPT
C10006
2200pF
50V
LED_DRIVER
R10022
0
1/10W
5%
LED_DRIVER_LGD
P10001
12507WR-06L
LED_DRIVER_NON_LGD
1
2
3
4
5
6
7
ERROR_OUT
R10012
5.1
OPT
R10001
100
1/10W
LED_DRIVER
R10023
0
1/10W
5%
LED_DRIVER_LGD
R10002
10K
1/10W
OPT
R10016
3K
1/8W
LED_DRIVER
C10002
2.2uF
50V
LED_DRIVER
C10009
1uF
10V
LED_DRIVER
R10020
0
1/10W
5%
LED_DRIVER_NON_LGD
C10010
1000pF
50V
OPT
PWM_DIM
C10020
2.2uF
100V
OPT
R10005
100
1/10W
OPT
R10011-*1
27K
1/10W
1%
LGD
R10019
16K
1/10W
18.5"
D10001
PDS5100H-13
LED_DRIVER
+24V_LED_driver
C10017
1000pF
50V
LED_DRIVER
C10008
0.1uF
50V
LED_DRIVER
R10013
51K
1/10W
5%
AUO_CPT
C10005
0.1uF
50V
LED_DRIVER
C10003
100pF
50V
LED_DRIVER
R10024
3.9K
PWM_PULL_DOWN
Q10001
AP18T10GH
LED_DRIVER
S
D
G
R10007
4.7
1/10W
LED_DRIVER
P10000
10031HR-H06
LED_DRIVER_LGD
1
2
3
4
5
6
7
C10013
1000pF
50V
LED_DRIVER
C10004
100pF
50V
LED_DRIVER
R10009
51K
1%
OPT
L10001
33uH
LED_DRIVER
R10014
7.5K
1/8W
LED_DRIVER
C10021
0.1uF
50V
LED_DRIVER
R10013-*1
27K
1/10W
1%
LGD
R10017
0.1
1%
LED_DRIVER
R10004
100K
1/10W
LED_DRIVER
R10010
10K
1/8W
LED_DRIVER
C10001
2.2uF
50V
LED_DRIVER
R10015
12
LED_DRIVER
R10018
560K
1/10W
LED_DRIVER
R10003
100
1/10W
LED_DRIVER
R10008
16K
1%
LED_DRIVER
C10014
10uF
100V
LED_DRIVER
IC10000
MAX16814
LED_DRIVER
1
IN
3
COMP
7
SETI
9
SGND
10
DIM
11
OUT1
12
OUT2
13
LEDGND
14
OUT3
15
OUT4
16
CS
17
PGND
18
NDRV
19
DRV
20
VCC
5
FLT
8
RSDT
6
OVP
4
RT
2
EN
21
[EP]PGND/LEDGND
R10006
390
1/10W
LED_DRIVER
R10021
0
1/10W
5%
LED_DRIVER_NON_LGD
R10019-*1
11K
1/10W
21.5"
C10011
1000pF
50V
OPT
C10018
2.2uF
100V
LED_DRIVER
C10019
1000pF
50V
LED_DRIVER
R10011-*3
39K
1/10W
1%
CMI_21.6"
R10013-*3
56K
1/10W
1%
CMI_21.6"
R10019-*2
16K
1/10W
CMI_21.6"
R10011-*2
39K
1/10W
1%
CMI_18.5"
R10013-*2
56K
1/10W
1%
CMI_18.5"
R10019-*3
22K
1/10W
CMI_18.5"
LGD_21.5_FHD
R10011
LED driver circuit for TN module
70mA_Max
44.28V
AUO_21.5_FHD
48.0
CMI_21.6
63.85V
R10019
CMI_21.6
11Kohm
wafer modify & resister add
C104 : 10uF --> 2.2nF
57.6V_Max
61.35mA
27Kohm
must be modifed
AUO_18.5
24.8V_Typ
46.4
36.0V_Max
CMI_21.6_FHD
33.6
F=7.35x10^9/RT
AUO_18.5_HD
57.6V_Max
51.2
560Kohm
111.11mA
CPT_21.5
Max
C106 : 0.68uF --> 0.33uF
560Kohm
63.85V
36.0
-
110mA_Typ
Forward voltage spec.
22Kohm
2010.06.30. hwson 
for thermal Issue
52.0V_Typ
R120 : 6.8K --> 3K
CMI_18.51
Module
11Kohm
51Kohm
R113/R114
34.0V_Typ
52.8V_Typ
16Kohm
LGD_21.5
Vs spec
16Kohm
AUO_18.5
close to IC10000
2010.02.07 for PQ/19V_LED
56.0
44.28V
57.6
560Kohm
51.2V_Typ
AUO_21.5
27.2
30.0
-
Typ
OVP = 1.23*(1+R1/R2)
ILED spec
Remark
56.0V_Max
AUO_21.5
65.24mA
ESD protection solution
27.2V_Max
40.8
close to IC10000
24.8
37.8V_Typ
63.85V
Remark
63mA_Max
32.54V
120mA_Max
CMI_18.51
34.0
11Kohm
60mA_Typ
min
40.8V_Max
Operating Freq.
560Kohm
37.8
CMI_18.51_HD
2010.06.30 HWSON
R10013
Module
ILED = 1500/RSETI
57.6
LGD_21.5
27Kohm
CPT_21.5_FHD
65mA_Typ
52.8
R121 : 0.03 --> 0.1
52.0
R111 : 470 --> 390
Module
560Kohm
R10018
47Kohm
CPT_21.5
must be modifed
560Kohm
65mA_Typ
70mA_Max
39Kohm
56Kohm
65.24mA
39Kohm
56Kohm
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.
SMALL_LVDS
2011/09/27
31
GP4L_S7LR2
RXA2-
RXA3-
RXA2+
+3.3V_Normal
C3108
0.1uF
16V
HD_SMALL
PANEL_VCC
RXBCK-
RXA1-
RXA0-
RXB0+
RXB4+
R3105
3.3K
OPT
RXA0+
R3106
10K
OPT
RXA4+
RXA0-
C3104
1000pF
50V
OPT
RXA3-
RXB0-
RXB2-
RXB1-
RXB1+
RXA1-
RXA4-
RXACK+
RXACK-
RXA1+
P3101
FF10001-30
HD_LARGE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
C3106
10uF
16V
OPT
RXA3+
RXA2-
C3105
0.1uF
16V
HD_LARGE
RXA0+
C3107
1000pF
50V
OPT
RXB4-
R3104
0
OPT
RXB2+
P3102
FF10001-30
HD_SMALL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
PANEL_VCC
RXACK+
RXA1+
R3103
0
HD_LARGE
RXB3+
RXB3-
RXACK-
RXA2+
RXBCK+
RXA3+
R3107
0
CMI_18.51
L3102
70-ohm
HD_SMALL
L3101
70-ohm
HD_LARGE
LVDS_SMALL
[30Pin LVDS Connector]
 (For HD_Small)
LVDS_SEL
[30Pin LVDS Connector]
 (For HD_LARGE)
THERMAL
THERMAL
THERMAL
THERMAL
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.
SMALL_POWER
2011/10/10
33
GP4L_S7LR2
10uF
C3335
10V
R3358
22
1/16W
5%
+3.5V_ST
+3.5V_ST
C3303
0.1uF
16V
NON_Adapter
L3312
CIC21J501NE
C3363
1uF
25V
R3383
22K
OPT
C3368
0.01uF
50V
C3355
0.1uF
16V
R3344
27K
560pF
C3349
50V
R3367
68K
+12V/+15V
C3345
10uF
16V
OPT
L3309
BLM18PG121SN1D
R3335
10K
C3338
0.1uF
16V
NON_CI_CAP
+3.3V_Normal
C3372
10uF
25V
L3319
BLM18PG121SN1D
NON_Adapter
R3323
10K
OPT
R3300
0
Q3309
AO3407A
G
D
S
+3.3V_Normal
C3352
22uF
10V
A_DIM
C3357
22uF
10V
C3320
68uF
35V
+3.5V_ST
C3343
2.2uF
50V
WLED_ENABLE
P3301
SMAW200-12
NON_Adapter
1
+15V
2
+15V
3
GND
4
GND
5
+3.5V_ST
6
+3.5V_ST
7
GND
8
OLP
9
INV_ON
10
P_DIM
11
A_DIM
12
NC
IC3310
TJ3940S-2.5V-3L
1
GND
2
VOUT
3
VIN
+24V_LED
C3376
3.3uF
50V
C3370
0.1uF
50V
C3375
10uF
10V
D3300
MBRA340T3G
C3383
0.1uF
50V
IC3309
NCP803SN293
PWR_DET_ONSEMI
1
GND
3
VCC
2
RESET
P3300
SM14B-SRSS-TB
Adapter_26inch
1
24V
2
24V
3
24V
4
24V
5
24V
6
GND
7
GND
8
GND
9
GND
10
GND
11
ERROR_OUT
12
INV_ON
13
NC
14
PWM_DIM
15
GND
Q3310
SI4124DY-T1-GE3(VISHAY)
3
S_3
2
S_2
4
G
1
S_1
5
D_1
6
D_2
7
D_3
8
D_4
R3324
10K
R3370
100K
C3362
0.1uF
16V
LIPS
C3336
0.1uF
16V
NON_CI_CAP
R3304
1K
OLP
R3341
10K
Adapter
WLED_ENABLE
C3304
0.01uF
50V
R3313
6.8K
OPT
R3361
22K
R3350
4.3K
1%
+12V/+15V
C3334
10uF
10V
R3345
22K
+5V_PANEL
+3.5V_ST
C3346
3300pF
50V
R3380
100
1%
R3379
100
1%
LIPS
R
3
3
5
3
5
6
K
1
/
1
6
W
1
%
C3354
100pF
50V
C3361
0.1uF
50V
C3328
0.1uF
16V
OPT
R3340
10K
OPT
+24V_LED_driver
R3366
0
JK3300
JPD003N-M432-4F
Adapter
GND
SW
24V
R3348
22K
R3374
100K
ERROR_OUT
POWER_ON/OFF_1
C3367
1uF
50V
C3371
0.1uF
16V
NON_CI_CAP
R3381
120K
1%
R3334
10K
+24V/+15V
R3388
10K
NON_Adapter
L3313
BLM18PG121SN1D
+24V/+15V
PWM_DIM
+3.3V_Normal
L3315
CPI2520NHL3R3ME
Adapter
2520
3.3uH
R3342
22K
OPT
C3317
0.1uF
50V
R3346-*1
5.6K
12V_PANEL
IC3305
AP7173-SPG-13 HF(DIODES)
3
VCC
2
PG
4
EN
1
IN
5
GND
6
SS
7
FB
8
OUT
9
[EP]
C3324
22uF
16V
+3.3V_Normal
+12V/+15V
+5V_Normal
+24V/+15V
+3.5V_ST
+24V
C3300
0.1uF
16V
OPT
C3382
0.1uF
16V
OPT
R3346
2.7K
+5V_PANEL
+5V_Normal
C3351
0.01uF
50V
C3360
0.1uF
16V
R3309
10K
OPT
R3384
30K
1/10W
1%
R3389
0
NON_Adapter
+24V_LED_driver
L3316
4.7uH
SP-7850_4.7
C3385
0.1uF
50V
PANEL_CTL
C3358
0.1uF
16V
R3375
1.6K
1/8W
1%
R3343
15K
C3316
0.1uF
50V
Adapter
R3328
10K
PANEL_VCC
C3364
0.1uF
16V
PWM_DIM
C3374
0.1uF
50V
R3360
27K
+3.5V_ST
IC3304
TPS54319TRE
1
VIN_1
3
GND_1
7
COMP
9
SS/TR
10
PH_1
11
PH_2
12
PH_3
13
BOOT
14
PWRGD
15
EN
16
VIN_3
5
AGND
8
RT/CLK
6
VSENSE
4
GND_2
2
VIN_2
17
EP[GND]
C3348
4.7uF
16V
INV_CTL
RL_ON_BUFFER
L3317
3.6uH
NR8040T3R6N
R3314
12K
C3344
0.1uF
16V
C3381
3.3uF
50V
C3380
10uF
10V
+3.5V_ST
R3369
10K
R3301
4.7K
NON_Adapter
C3339
0.1uF
50V
RL_ON
R3357
10K
R3378
22
+24V/+15V
+3.3V_Normal
R3347
330K
R3311
10K
+1.5V_DDR
R3376
6.8K
1%
+3.5V_ST
C3386
10uF
10V
R3351
0
1/16W
5%
+12V/+15V
R3377
100K
1/8W
5%
C3356
3.3uF
50V
R3365
27K
1/16W
1%
OPT
R3312
1K
R3387
100K
1/10W
1%
R3303
10K
OLP
C3342
0.1uF
16V
R3349
4.7K
1%
+24V/+15V
RL_ON_BUFFER
C3301
0.1uF
50V
R3354
0
OPT
C3377
10uF
25V
C3359
0.01uF
50V
Q3307
AO3407A
G
D
S
R
3
3
5
2
2
7
K
1
/
1
6
W
1
%
R3339
10K
R3336
10K
OPT
L3314
3.6uH
NR8040T3R6N
C3378
3.3uF
50V
IC3307
MP4460DQ-LF-Z
3
EN
2
SW_2
4
COMP
1
SW_1
5
FB
6
GND
7
FREQ
8
VIN_1
9
VIN_2
10
BST
11
EP_GND
C3341
0.1uF
16V
R3329
0
OPT
R3359
18K
R3308
10K
POWER_DET
R3315
10K
C3365
2.2uF
50V
+3.5V_ST
R3382
10K
OPT
+3.3V_Normal
Q3306
AO3407A
G
D
S
WLED_ENABLE
FB_CORE
C3350
22uF
10V
R3302
100
RL_ON_BUFFER
+1.10V_VDDC
C3353
0.1uF
50V
OPT
R3373
100K
LIPS
+3.5V_ST
OLP
C3318
2200pF
50V
IC3306
MP8670DN-LF-Z
3
VCC
2
BST
4
BG
1
SW
5
GND
6
FB
7
EN/SYNC
8
IN
R3337
10K
L3305
3.6uH
NR8040T3R6N
R3345-*1
33K
12V_PANEL
R3332
4.7K
R3338
22K
OPT
IC3308
NCP803SN293
LIPS_PWR_DET_ONSEMI
1
GND
3
VCC
2
RESET
C3384
0.1uF
50V
RL_ON_BUFFER
+2.5V_Normal
C3388
0.1uF
16V
POWER_ON/OFF_1
+24V_LED
R3364
0
1/16W
5%
Q3302
RT1P141C-T112
1
2
3
Q3304
MMBT3904(NXP)
E
B
C
Q3308
MMBT3904(NXP)
E
B
C
C3337
0.015uF
50V
PANEL_VCC_0.015uF
Q3300
MMBT3904(NXP)
E
B
C
Q3301
MMBT3904(NXP)
E
B
C
Q3303
MMBT3904(NXP)
OPT
E
B
C
Q3305
MMBT3904(NXP)
E
B
C
Q3311
MMBT3904(NXP)
E
B
C
+5V_Normal
C3322
22uF
16V
+5V_USB
IC3302
AOZ1051PI
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
SS
8
NC
9
[EP]LX
C3302
10uF
25V
L3301
CIC21J501NE
R3306
11K
1%
R3390
12K
R3305
56K
1%
C3325
22uF
16V
OPT
+12V/+15V
R3307
12K
1%
C3390
100pF
OPT
L3310
BLM18PG121SN1D
Non_5V_PANEL
R3310
10K
L3307
3.6uH
NR8040T3R6N
C3391
10uF
25V
OPT
C3392
0.1uF
16V
OPT
C3393
0.1uF
16V
OPT
C3311
2200pF
50V
L3321
CIC21J501NE
C3305
10uF
25V
C3307
10uF
25V
OPT
C3312
0.1uF
16V
OPT
IC3300
AOZ1051PI
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
SS
8
NC
9
[EP]LX
R3319
56K
1%
R3321
12K
1%
C3323
100pF
OPT
R3320
11K
1%
C3331
22uF
16V
OPT
IC3308-*1
APX803D29
LIPS_PWR_DET_DIODES
1
GND
3
VCC
2
RESET
IC3309-*1
APX803D29
PWR_DET_DIODES
1
GND
3
VCC
2
RESET
C3369
220pF
50V
C3340
0.01uF
50V
PANEL_VCC_0.01uF
C3347
3300pF
50V
R3356
2.2K
PANEL_DISCHARGE_RES_2.2K
R3355
2.2K
PANEL_DISCHARGE_RES_2.2K
L3303
CIS21J121
NON_Adapter
L3300
CIS21J121
NON_Adapter
L3308
CIS21J121
Adapter
L3304
CIS21J121
Adapter
R3386
1
1/16W
5%
Q3312
AO3407A
G
D
S
C3314
0.01uF
50V
C3394
0.01uF
50V
C3373
4.7uF
16V
C3387
0.1uF
16V
OPT
C3379
0.1uF
16V
R3368
10K
C3366
0.1uF
16V
NON_CI_CAP
C3389
22uF
16V
R3371
22K
R3385
10K
OPT
R3362
3.9K
1%
LIPS
R3363
1.2K
1%
LIPS
L3318
BLM18SG700TN1D
70-ohm
L3320
12V_PANEL
70-ohm
L3311
+5V_PANEL
70-ohm
R3372
100
R3355-*1
4.7K
PANEL_DISCHARGE_RES_4.7K
R3356-*1
4.7K
PANEL_DISCHARGE_RES_4.7K
2.5A
Vout=0.8*(1+R1/R2) = 1.5319
1A
R2
R1
1.5A
+1.5V_DDR
Switching noise reducing [MPS recommend]
S7LR core 1.2V volt
Vd=550mV
780 mA
AMP_VCC
close to pin
+3.3V_Normal
real output : 12.3V
New item
Vout=0.827*(1+R1/R2)=1.225V
AO3407A Vgs : 10.8V(24V input)
UNDER CHECKING
3A
3A
24V->15V
R1
Power for LED driver
R1
300 mA
R2
AO3407A Vgs : 8.3V(15V input)
AMP_VCC Control
close to IC7502
ST_3.5V-->3.5V --> 3.375V
R2
PANEL_POWER
MAX 1A
24V->3.5V
Placed on SMD-TOP
+5V_Normal
(LIPS_PWR_DET_ONSEMI)
Power_DET
+2.5V
AO3407A Vgs : 10.8V
3.3K -> 1K (threshold voltage up)
24V-->3.48V
Max 1000mA
* H/W option : Adapter_26inch
* H/W option : +5V_PANEL
* H/W option : Adapter
* H/W option : Adapter
* H/W option : Adapter
R2
+5V_USB
Vout=0.8*(1+R1/R2)
3A
R1
2000 mA
R2
R1
Vout=0.8*(1+R1/R2)
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