LG -UD6100 Service Manual page 35

4.3.3 Key Backlight LED Trouble
Test Points
LED
309
LED
302
Figure 4.3.3 KEYPAD BACK LIGHT PART
Circuit Diagram
LED312 LED313
LED
LED LED
308 303 314
LED LED LED
301 310
311
LED316 LED315
Figure 4.3.8 KEYPAD Back Light Circuit
LED317
LED
307
LED
304
LED318