Numeric Keyboard Illumination Problems; Navigation Keys Illumination Problems - Sony Ericsson W995 Troubleshooting Manual

Numeric Keyboard 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)
No
Is
MP 59
SL 5 Replace
(V2470_Pin C1)
V2470 Yes or MP 60 (V2470_Pin C2)
SL 4 Escalate Short Circuit
to the GND
TROUBLESHOOTING
Replace
Yes
X2410
SL 5 Replace
No N2000
SL 4 Escalate
Numeric Keyboard and Navigation Keys Illumination Problems

Navigation Keys illumination Problems

Load ETS SW into the Phone
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:
If Navigation Keys LED are working on the TRS Fixture then
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
SL 5 Replace
N2000 No
SL 4 Escalate
SEMC Troubleshooting Manual
START
Use TRS Fixture
MMI
Misc
Init Screen Testing
Led and Backlight
Activate:
Navigation Keys LED
Replace
3.8 Volt DC at Replace
Yes
MP 14 (C4220) X4300
1230-1858 rev. 1
W995
14 (125)