Keypad Light - LG U8500 Service Manual

3. TECHNICAL BRIEF

3.10.8 Keypad Light

There are 22 blue LEDs on Top side in board backlight circuit, which are driven by
KEYBD_BACKLIGHT line form PM6650(note, one LED is not mounted).
Key Pad backlight controlled by PM6650.
+VPWR
KEY_BACK_LIGHT
LD616
0
R666
R607
47
LEBB-S14H
LD600
R651
47
LEBB-S14H LEBB-S14H
LD601
R654
47
LEBB-S14H LEBB-S14H
LD605
R657
47
LEBB-S14H LEBB-S14H
LD603
R660
47
LEBB-S14H LEBB-S14H
LD611
R663
47
LEBB-S14H LEBB-S14H
LD618
R668
47
LEBB-S14H LEBB-S14H
LD621
R674
47
LEBB-S14H
Figure 3.10.8-1 Keypad Backlight Circuit
LD602
R650
LD617
47
R667 LEBB-S14H
LD613
47
LEBB-S14H R653
LD610
47
R652 LEBB-S14H
LD608
47
R656
LD606
47
R655 LEBB-S14H
LD612
47
R659
LD609
47
R658 LEBB-S14H
LD614
47
R662
LD607
47
R661 LEBB-S14H
LD604
47
R665
LD615
47
R664 LEBB-S14H
LD620
47
R670
LD619
47
R669 LEBB-S14H
47
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KYBD_BACKLIGHT