Proximity Sensor Problems; On/Off Key Problems - Sony Ericsson Aino - U10 Troubleshooting Manual

Proximity Sensor Problems

START
Step 1:
Replace PBA Top and retest the Phone
If successful claim PBA Top if not go to step 2.
Step 2:
Replace Display 3" TFT and retest the Phone
If successful claim Display 3" TFT if not go to step 3.
Step 3:
Replace the Slider FPC Assy and retest the Phone
if successful claim Slider FPC Assy if not go to step 4.
Step 4:
Perform a visual inspection of the
X4200 Board to Board Connector
SL 5 Replace Is the
V4201, V4202 or X4200
Yes
N2000 BtB Connector
SL 4 Escalate Ok
TROUBLESHOOTING
Replace
No
X4200
Proximity Sensor Problems - On/Off Key Problems

On/Off Key Problems

1.8 Volt DC at
Replace
Yes
MP 6
V2475
(V2475_Anode)
SL 5 Replace
N2010 No
SL 4 Escalate
SEMC Troubleshooting Manual
START
Step 1:
Load ETS SW into the Phone
Use TRS Fixture
Connect: Keyboard FPC Assembly to the PBA
Connect: VBATT and DCIO/SEPI
Step 2:
Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Activate:
Key Test
Press the On/Off Key on the Keyboard
Is the Replace
On/Off Key Yes Keyboard FPC
Ok Assembly
No
Is the
Yes Problem with
Power Off
No
SL 5 Replace
3.7 Volt DC at
No N2000
MP 8
(V2475_Cathode) SL 4 Escalate
Replace
Yes
X2500
1235-5821 rev. 1
Aino - U10
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