LG KU250 Service Manual - Page 60
Key_back_light Led8ea
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3. TECHNICAL BRIEF 3.11.6 Keypad Light There are 8 Blue LEDs in Main key backlight circuit, which are driven by KYDB_BACKLIGHT line from PM6650. KEY_BACK_LIGHT LED(8EA) +VPWR LD400 LEBB-S14H LD403 LEBB-S14H LD406 LEBB-S14H REV_B : EDLH0013501 --> EDLH0006001 R411 100ohm R414 100ohm R417 100ohm KYBD_BACKLIGHT LD404 LD407 LEBB-S14H R415 LEBB-S14H 100ohm R418 100ohm LD402 LEBB-S14H LD405 LEBB-S14H R413 100ohm LD408 LEBB-S14H R416 100ohm R419 100ohm Figure 1.22 Schematic of KEY back light circuit (KEY side) - 61 -
3. TECHNICAL BRIEF
- 61 -
3.11.6 Keypad Light
There are 8 Blue LEDs in Main key backlight circuit, which are driven by KYDB_BACKLIGHT line from
PM6650.
Figure 1.22 Schematic of KEY back light circuit (KEY side)
KEY_BACK_LIGHT LED(8EA)
REV_B : EDLH0013501 --> EDLH0006001
R418
100ohm
100ohm
R415
100ohm
R411
R413 100ohm
LD408
LEBB-S14H
LEBB-S14H
LD405
LD406
LEBB-S14H
R414
100ohm
LD400
LEBB-S14H
100ohm
R417
LD404
LEBB-S14H
LEBB-S14H
LD403
100ohm
R416
LEBB-S14H
LD402
R419 100ohm
LEBB-S14H
LD407
+VPWR
KYBD_BACKLIGHT