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4.11 Key Backlight LED Trouble
SETTING : Connect PIF to the phone, and power on, Enter engineering mode, and set
Backlight on at Backlight of BB test menu.
START
PIF Power on
Is the voltage
level at Pin2 at Q502 about
1.3 V
Yes
Are all LEDs
LD503~LD514 not
working
Yes
Replace Q502, and
try again
Yes
Key backlight LED
Working!!
N0
Check the soldering of R512, R513
N0
Check the soldering of Replace
- 63 -
4. TROUBLE SHOOTING
LEDs not working
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