LG GW520 - Page 45

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. BB Circuit Technical brief
GW520 service manual
3.10.2 Slide KEY back-light illumination
GW520 is control the Tr for nomal KEY back-light illumination.
[Figure 3.10.2-1] Slide KEY back-light LED circuit diagram
3.10.3 Function/Shift KEY back-light illumination
GW520 is control the Tr for nomal KEY back-light illumination.
[Figure 3.10.3-1] Function/Shift KEY back-light LED circuit diagram
KEY_LED
LD802
LEWW-S14
EDLH0005901EDLH0005901
LEWW-S14
LD801LD800
R811
120
R808 1K
R809 10K
VBAT
470
R807R806
470
EVLC5S0250
VA807
C
1
E
EQBN0007601
KTC4075E
Q800
2
B
3
SLIDE_KEY_LED
VBAT
1K
VBAT
R241
EQBN0007601
KTC4075E
Q201
2
B
3
C
1
E
1KR242
10KR246
LEBB-S14E
LD201
R234
1K
1K
R237
R245 10K
LD200
LEBB-S14E
B
2
C
3
E
1
Q202
KTC4075E
EQBN0007601
SHIFT_LED FN_LED