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4. TROUBLE SHOOTING
4.11 Key Backlight LED Trouble
SETTING : After initialize Agilent 8960, Test in EGSM, connect PIF to the phone,
and Power on. Enter The engineering mode, and set "Vibrator on" at Vibration
of BB test menu
R316
Figure 4-25.
START
PIF Power On
Is the voltage level at Pin1 at
O301 about 1.2V?
Yes
Are all LEDs
LD300~LD305 working
Yes
Backlight LED
Working!!
R302
Q301
C319
C320
C321
C322
27p
27p
27p
27p
No
Check the soldering of
No
Check the soldering or
Replace LEDs not working
LD301
R306
R312
R310
R311
LD305
R313
R315
LD303
R308
KEY BACKLIGHT
C323
C324
27p
27p
U302
MAX4599EXT-T
5
COM
R316
RPWRON
0
- 62 -
R313,R315
Figure 4-26
R312
NO 6
KEY_BACKLIGHT
0
NC
4
C318
0.1u
LD304
R309
R307
LD302
R305
LD300
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