LG 42LX6500 Service Manual page 46

MAIN 3.3V & 3.3V IO POWER
VLCD_POWER
L301
IC301
120-ohm MP8706EN-C247-LF-Z
IN GND
1 8
C308
C311 R308
1uF
SW_1 VCC
100pF
2 7 50V
C301 50V
22uF OPT
25V SW_2 FB
3 6
C302
VLCD_POWER
0.1uF
BST EN/SYNC R309
4 5 (+12V) 12.4K
R307
R301
100K
22
C309
R306
0.47uF
39K
50V
OPT
L305
3.6uH
4.9A
1.0V DIGITAL CORE POWER
+3.3V
L303
120-ohm
R305
100K
IC302
MP2212DN
C304 R302
100pF
3K
1%
R1 FB EN/SYNC
1 8
R303
Vout= 0.8*(1+R1/R2)
9.1K
1% GND SW_2
2 7
R2
IN SW_1
3 6
BS VCC
C303 C306
4 5
22uF 10uF
16V 6.3V
OPT
R304
10
1%
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.
All manuals and user guides at all-guides.com
DDR2 SDRAM SOURCE POWER for FRC
VLCD_POWER
(+12V)
+3.3V
L304
120-ohm
Vout= 0.8*(1+R1/R2)
C320
10uF
25V
39K
C377 C374 C317
1%
22uF 22uF 22uF
R1
16V 16V 16V
R310
100K
1%
R2
DDR2 SDRAM SOURCE POWER for FPGA
VLCD_POWER
L310
120-ohm
C314
0.22uF
50V
+1.0VDC
L306
3.6uH
NR8040T3R6N
C316
C318 C319
C315 22uF 22uF 0.1uF
0.1uF 16V 16V
16V
50V
C312
1uF
10V
1.2V FPGA CORE POWER
+3.3V
C330
C334
1uF
25V 0.1uF
50V
L307
LX_1
PGOOD
22 15 3.3uH
4.1A
LX_2
20
LX_3
EN/PSV
25 21
LX_4 R320 C338 R334
P3 8.2K
0.1uF 39K
OPT
IC304 50V
ENL
28
SC424MLTRT
LXBST
12
LXS
FB
1 24
ILIM
23
C325
TON
0.1uF 27
C340
16V
BST 1000pF
7
OPT
R318
100K
IC310
MP8706EN-C247-LF-Z
Vout= 0.8*(1+R1/R2)
IN GND
1 8
C335
C339 R336
1uF
SW_1 VCC 10K
2 7 50V 100pF 1%
C321 50V
R1
22uF OPT
SW_2 FB
25V
3 6
C326
VLCD_POWER
0.1uF
BST EN/SYNC
4 5 (+12V) R337
4.7K
R321
R311 1%
100K
22
C337 R2
R319
0.47uF
39K
50V
L314
3.6uH
4.9A
Vout= 0.8*(1+R1/R2)
L308
120-ohm
R314
100K
C327 100pF
C332
0.47uF
50V
R312 R313 R317
10K 0 5.1K
IC305
MP2212DN
FB EN/SYNC
1 8
L309
3.6uH
GND SW_2
2 7
C331
IN SW_1
3 6 22uF
16V
OPT
C322 C323 C324
22uF 0.1uF 22uF BS VCC
4 5
16V 50V 16V
OPT
D302
R315
1N4148W_DIODES
10
100V C328
R316 0.1uF
10
C329
1uF
25V
1.8V DDR SDRAM POWER
+2.5VQ
+2.5VQ
C349
10uF
10V
C371 C372 C373
C368
0.01uF 22uF 22uF 22uF
16V 16V 16V
OPT
C369
R335
10K 100pF
+2.5VQ
1%
50V
R1
C350
R338 10uF
4.3K
10V
1%
R2
2V5
1.8V FPGA DDR SDRAM POWER
2V5
C375 C376 C370
22uF 22uF 22uF
16V 16V 16V
C348 C352
10uF 0.1uF
10V 16V
1.8V FPGA DDR SDRAM VTT & VREF
DDR_VTT
C310 C305 C307 C344 C347
22uF 22uF 22uF 10uF 0.1uF
16V 16V 16V 16V 16V
OPT
1V2
DDR_VREF0
C333 C336 L311
0.1uF 22uF BLM18PG121SN1D
50V 16V
OPT OPT
C343 C346 C351
0.1uF 0.1uF 0.1uF
DDR_VREF1
16V 16V 16V
L312
BLM18PG121SN1D
C342 C345
0.1uF 0.1uF
16V 16V
3D + 240 FRC + TCON BOARD
FRC & FPGA Power Block
+1.8V_DDR
IC307
Vout= 0.8*(1+R1/R2)
SC4215ISTRT
NC_1 GND R330
1 8 15K
1%
R1
R323
EN ADJ
91K
2 7
VIN VO
3 6
R331
C361 C365
12K
NC_2 NC_3 1% 22uF 0.1uF
C353 C356
4 5
R2 16V 16V
0.1uF 0.22uF
16V 50V
+1.8V_DDRS
IC308 Vout= 0.8*(1+R1/R2)
SC4215ISTRT
NC_1 GND R332
1 8 15K
1/10W
1%
R324
R1
EN ADJ
100K
2 7
VIN VO
3 6
R333
C362 C366
12K
NC_2 NC_3 1/10W 22uF 0.1uF
C354 C357
4 5 1%
16V 16V
0.1uF 0.22uF
R2
16V 50V
1V8
IC306 Vout= 0.8*(1+R1/R2)
SC4215ISTRT
NC_1 GND R327
1 8 15K
1/10W
1%
R322
R1
EN ADJ
100K
2 7
VIN VO
3 6
R328
C360 C364
12K
NC_2 NC_3 1/10W 22uF 0.1uF
C355
4 5 1%
16V 16V
0.22uF
R2
50V
+3.3V
IC309
BD35331F-E2
1V8
GND VTT
1 8
EN VTT_IN
2 7
VTTS VCC
3 6
R329
VREF VDDQ
220
4 5
C363 C367
C359
C358
2.2uF 0.1uF
10uF
0.1uF
25V 10V 16V
16V
2009. 11. 13
3 10