W995
1230-1858 rev. 1
TROUBLESHOOTING
Numeric Keyboard and
T
R
O
UBL
ESHOOT
ING
Navigation Keys Illumination Problems
START
Load ETS SW into the Phone
Use the TRS Fixture and Connect:
Key Flex Assy to the PBA
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Led and Backlight
Activate:
Numeric Keyboard
If Numeric Keyboard LED are working on the TRS Fixture then
Replace Key Flex Assy
If not then continue with the
Numeric Keyboard illumination Problems TRS guide
1:
Disconnect: VBATT and DCIO/SEPI
2:
Disconnect and Remove the Key Flex Assy from the PBA
3:
Connect VBATT and DCIO/SEPI
3.8 Volt DC at
MP 61 (C4221)
Replace
X2410
Yes
SL 5 Replace
N2000
SL 4 Escalate
No
Is
MP 59
(V2470_Pin C1)
or MP 60 (V2470_Pin C2)
Short Circuit
to the GND
No
SL 5 Replace
V2470
SL 4 Escalate
Yes
Numeric Keyboard illumination Problems
START
Load ETS SW into the Phone
Use TRS Fixture
Use the TRS Fixture Display Holder and Connect:
Slider Flex Assy and PBA Navi Key to the PBA
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Led and Backlight
Activate:
Navigation Keys LED
If Navigation Keys LED are working on the TRS Fixture then
Replace
PBA Navi Key or Slider Flex Assy
If not then continue with the
Navigation Keys illumination Problems TRS guide
1:
Disconnect: VBATT and DCIO/SEPI
2:
Disconnect the Slider Flex Assy from the PBA
and Remove the TRS Fixture Display Holder
3:
Connect VBATT and DCIO/SEPI
3.8 Volt DC at
MP 14 (C4220)
Replace
X4300
Yes
SL 5 Replace
N2000
SL 4 Escalate
No
Navigation Keys illumination Problems
SEMC Troubleshooting Manual
14
(125)