Only For Training And Service Purposes - LG KS10 Service Manual

3.9.3. Keypad backlight
There are 8 White LEDs on Top side of Main PCB and 9 White LEDs on Top side of sub PCB in board
backlight circuit and, which are driven by KEYBD_BACKLIGHT line form PM6650. Key Pad backlight
controlled by PM6650.
Figure. Schematic of main PCB keypad backlight circuit
KPD_DRV_N
Figure. Schematic of key PCB keypad backlight circuit
Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

AP_+VPWR
LD400
R402 100ohm
SSC-TWH104-HLS
LD402
R405
SSC-TWH104-HLS
LD404
R408 100ohm
SSC-TWH104-HLS
LD406
R411
SSC-TWH104-HLS
KPD_DRV_N
VA400
EVL14K02200
AP_+VPWR
LD100
R106 100ohm
SSC-TWH104-HLS
LD103
R109 100ohm
SSC-TWH104-HLS
LD105
R111 100ohm
SSC-TWH104-HLS
LD107
R113 100ohm
SSC-TWH104-HLS
VA100
EVL14K02200
- 45 -
3. TECHNICAL BRIEF
LD401
R403 100ohm
SSC-TWH104-HLS
LD403
100ohm R406 100ohm
SSC-TWH104-HLS
LD405
R409 100ohm
SSC-TWH104-HLS
LD407
100ohm R412 100ohm
SSC-TWH104-HLS
LD101
R107 100ohm
SSC-TWH104-HLS SSC-TWH104-HLS
LD104
R110 100ohm
SSC-TWH104-HLS
LD106
R112 100ohm
SSC-TWH104-HLS
LD108
R114 100ohm
SSC-TWH104-HLS
LD102
R108 100ohm
LGE Internal Use Only