Sony Ericsson U1a User manual

1230-3676 Rev2
Troubleshooting Guide
- electrical -
Satio
U1a,U1i,U_1
©Sony Ericsson Mobile Communications AB – Company Internal

Trouble Shooting Guide (elect)
1230-3676 Rev2
CONTENTS
1Troubleshooting Flow......................................................................3
1.1 Display.....................................................................................................3
1.2 Illumination.............................................................................................. 4
1.3 Keys and Sensors................................................................................... 5
1.4 Alert and RTC..........................................................................................6
1.5 Audio........................................................................................................7
1.6 On/Off.......................................................................................................8
1.7 Charging/Capacity .................................................................................. 9
1.8 SIM..........................................................................................................10
1.9 Camera...................................................................................................10
1.10 Data Communication............................................................................11
1.11 Memory Stick / Memory Card............................................................... 11
1.12 Network/Signal......................................................................................12
2Revision History.............................................................................13
©Sony Ericsson Mobile Communications AB – Company Internal 2(13)

Trouble Shooting Guide (elect)
1230-3676 Rev2
1 Troubleshooting Flow
For information about troubleshooting and optional troubleshooting equipment, refer to the
‘Generic Repair Manual – electrical’, section ‘Troubleshooting Directions’!
1.1 Display
Symptom:
Replace: Display problem
X2900 if damaged vision check all pins
Z2500, Z2501, Z2502, Z2503, Z2504, Z2505, Z2506 or Z2507
N2631, N2632, N2633 or N2636
N2630
©Sony Ericsson Mobile Communications AB – Company Internal 3(13)

Trouble Shooting Guide (elect)
1230-3676 Rev2
Troubleshooting Flow
1.2 Illumination
Symptom:
Replace: No Display and Key illumination
L4010 if more than 1 Ohm
V4180
N4180
Symptom:
Replace: No Display illumination
X2900 if damaged vision check A23 and B23
N4180
Symptom:
Replace: No keys illumination
V4121 or V4122
N4180
Symptom:
Replace: No Camera Key Blue LED
X2902 if damaged vision check B5-B7
N4180
Symptom:
Replace:
No Torch LED ( White LED as autofocus assistant and movie recording assistant light
source)
X2842 if damaged vision check A6-A8 and A10-A11
N4180
Symptom:
Replace: No Camera Cover Blue LEDs (3 blue ornament LEDs)
X2842 if damaged vision check A1-A3 and A13-A15
N4180
Symptom:
Replace: No Tally LED (Red tally LED for video recording indication and self-timer indication)
X2842 if damaged vision check A1-A3 and A16
N4180
Symptom:
Replace: No Flash LED (Xenon flash)
X1018 if damaged
X2842 if damaged vision check B1-B9 and B11-B13
X2820 if damaged vision check A9 and A13
N2802
V2802
N2803
Symptom:
Replace: No Red LEDs and Green LED on Receiver FCP (Trickle Charge LED and Charger LEDs)
X2821 if damaged vision check A13-A17
©Sony Ericsson Mobile Communications AB – Company Internal 4(13)

Trouble Shooting Guide (elect)
1230-3676 Rev2
Troubleshooting Flow
1.3 Keys and Sensors
Symptom:
Replace: Power On keys problems
X2821 if damaged vision check A2 and B1-B3
Symptom:
Replace: Touch Screen problems
X2821 if damaged vision check B14-B17
Symptom:
Replace: Volume Down key problems
X2902 if damaged vision check B2 and B4
Symptom:
Replace: Volume Up key problems
X2902 if damaged vision check A2 and B3
Symptom:
Replace: Mode Select key problems
X2902 if damaged vision check A4 and A6
Symptom:
Replace: Play / view key problems
X2902 if damaged vision check A5 and B4
Symptom:
Replace: Auto focus and Camera shutter problems
X2902 if damaged vision check A2,A6 and B3
Symptom:
Replace: Lock key problems
S2500
Symptom:
Replace: Light Sensor problems (no changes in display illuminations when covering light sensors)
X2821 if damaged vision check B12-B13
N4180
Symptom:
Replace:
Proximity Sensor problems (Display Illuminations does not turn off in a call when the
sensor are covered)
X2821 if damaged vision check B18-B25
Symptom:
Replace: Accelerometer problems
N2800
Symptom:
Replace: Camera cover detect problems
X2842 if damaged vision check B1-B3 and B10
©Sony Ericsson Mobile Communications AB – Company Internal 5(13)

Trouble Shooting Guide (elect)
1230-3676 Rev2
Troubleshooting Flow
1.4 Alert / RTC
Symptom:
Replace: Vibrator problems
B4000
Symptom:
Replace: The clock gain or lose time. SERP calibrating is performed
B2000
Symptom:
Replace: The clock has to be set after the battery has been detached
C4036
©Sony Ericsson Mobile Communications AB – Company Internal 6(13)

Trouble Shooting Guide (elect)
1230-3676 Rev2
Troubleshooting Flow
1.5 Audio
Symptom:
Replace: No Microphone
D5500
Symptom:
Replace: No Earphone / Ear speaker
X2821 if damaged Vision check A23-A24
Symptom:
Replace: No or bad Loudspeaker
L5506 or L5507 if more than 2 Ohm
V5500
N5506
Symptom:
Replace:
No Hands-free (PHF) Aux Microphone
X3000 if damaged Vision check 3-4
L3000 or L3002 if more than 2 Ohm
N5502
Symptom:
Replace:
No Hands-free (PHF) Aux Earphone / Aux Ear speaker
X3000 if damaged Vision check 2 and 5-6
L3001, L3003 or L3004 if more than 2 Ohm
N5502
N5500
Symptom:
Replace:
No Microphone and no Earphone / Ear speaker.
Phone stuck in PHF mode when PHF is not attached
V3001 if short circuit
N3000
Symptom:
Replace: No Hands-free (PHF) audio .Phone not recognizes PHF set
X3000 if damaged Vision check 8-9
N3000
Symptom:
Replace:
No FM Radio (PHF)
X3000 if damaged
N1403
N1400
©Sony Ericsson Mobile Communications AB – Company Internal 7(13)

Trouble Shooting Guide (elect)
1230-3676 Rev2
Troubleshooting Flow
1.6 On/Off
Symptom:
Replace: Current draw greater than 300 mAmps
N1001 if module getting hot
Symptom:
Replace: Current draw when powered off
N1001
Symptom:
Replace:
Using no current when On/Off key is pressed and will not start. Starts when charger is
inserted
X2821 if damaged vision check A2 and B1-B3
Symptom:
Replace:
Draws current when On/Off key is pressed, returns to zero
L4000 , L4002 or L4005 if more than 1 Ohm
L4130 or L4131 if more than 2 Ohm
N4000
N4003
N4004
B2000
N1001
Symptom:
Replace: Will no power off
V2101
Symptom:
Replace: Other
X4000 if damaged
©Sony Ericsson Mobile Communications AB – Company Internal 8(13)

Trouble Shooting Guide (elect)
1230-3676 Rev2
Troubleshooting Flow
1.7 Charging/Capacity
Symptom:
Replace:
No Charging from power outlet
X3000 or X4000 if damaged
C3013 if short circuit
V4001
Symptom:
Replace:
No Charging from computer via USB
X3000 if damaged
C3011 if short circuit
N3005
Symptom:
Replace: The clock has to be set after the battery has been detached
C4036
©Sony Ericsson Mobile Communications AB – Company Internal 9(13)

Trouble Shooting Guide (elect)
1230-3676 Rev2
Troubleshooting Flow
1.8 SIM
Symptom:
Replace: SIM not detected
X2842 if damaged Vision check A19-A20 and B15-B20
1.9 Camera
Symptom:
Replace: Main and VGA / VT Camera problems
L4132 if more than 2 Ohm
L4101 if more than 2 Ohm
N4150
N4152
Symptom:
Replace: Main Camera problems
X2820 if damaged vision check all pins
Symptom:
Replace: VGA / VT Camera problems
X2821 if damaged vision check A4-A13 ,A18-A21, B4-B11
©Sony Ericsson Mobile Communications AB – Company Internal 10(13)

Trouble Shooting Guide (elect)
1230-3676 Rev2
©Sony Ericsson Mobile Communications AB – Company Internal 11(13)
Troubleshooting Flow
1.10 Data Communication
Symptom:
Replace:
No communication via the System Connector
X3000 if damaged Vision check 1 and 9-11
N3005 and C3011 if not charging via USB
N3002 if pin10 or pin 11 at X3000 is short circuit to GND or VBAT.
Z3000
Symptom:
Replace:
Bad Bluetooth and Wlan connection
X1401 if damaged
L1404 if more than 1 Ohm
N1401
Symptom:
Replace: No Bluetooth or Wlan connection
N1403
N1400
Symptom:
Replace: No GPS connection
L1502 if more than 1 Ohm
Z1500
B1500
N1500
Symptom:
Replace: No or bad TV out
X3000 if damaged Vision check 7-9
V3002 if short circuit
N3006
1.11 Memory Stick / Memory Card
Symptom:
Replace: Memory stick / Memory Card (Micro SD) not detected
X2600 if damaged

Trouble Shooting Guide (elect)
1230-3676 Rev2
Troubleshooting Flow
1.12 Network/Signal
Symptom:
Action: Phone fails to lock on to network during radiated (wireless) Go / No Go test
Use RF probe to perform conducted Go / No Go test
Symptom:
Check:
Check:
Replace:
Action:
Phone passes conducted (RF cable) Go / No Go test but fails radiated (wireless) Go / No
Go test
X1010, X1011, X1012, X1013, X1014, X1015, X1016 and X1017 for damage and
replace if necessary
X1000 for damage and replace if necessary
Antenna
Rerun the phone through radiated (wireless) Go/No Go testing
Symptom:
Replace: Phone fails conducted (RF probe) Go / No Go test
Run the calibration routine
Symptom:
Replace: Fails conducted (RF probe) Go/No Go test, but passes calibration
Rerun the phone through Go/No Go testing
Symptom:
Replace:
Fails any part of the calibration routine
X1000 if damaged
N4003 or N1001 if GSM fault
N1000 or N1001 if UMTS fault
©Sony Ericsson Mobile Communications AB – Company Internal 12(13)

Trouble Shooting Guide (elect)
1230-3676 Rev2
2 Revision History
Rev. Date Changes / Comments
1 2009-Okt-14 Initial release
2 2009-Okt-16 Template changes
©Sony Ericsson Mobile Communications AB – Company Internal 13(13)