LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 45 -
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
100ohm
R411
SSC-TWH104-HLS
LD407
SSC-TWH104-HLS
LD406
SSC-TWH104-HLS
LD402
EVL14K02200
VA400
R409 100ohm
100ohm
R412
AP_+VPWR
LD400
SSC-TWH104-HLS
100ohm
R406
R400
0
R408 100ohm
SSC-TWH104-HLS
LD401
SSC-TWH104-HLS
LD403
R403 100ohm
SSC-TWH104-HLS
LD405
100ohm
R405
R402 100ohm
LD404
SSC-TWH104-HLS
KPD_DRV_N
Figure. Schematic of key PCB keypad backlight circuit
100ohm
R109
EVL14K02200
VA100
100ohm
R111
100ohm
R110
LD108
SSC-TWH104-HLS
SSC-TWH104-HLS
LD107
LD104
SSC-TWH104-HLS
AP_+VPWR
SSC-TWH104-HLS
LD103
100ohm
100ohm
R113
R112
100ohm
R114
LD102
SSC-TWH104-HLS
LD100
SSC-TWH104-HLS
100ohm
R107 100ohm
R108
R106 100ohm
SSC-TWH104-HLS
LD101
LD105
SSC-TWH104-HLS
SSC-TWH104-HLS
LD106
KPD_DRV_N
Summary of Contents for KS10
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