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
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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
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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
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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
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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)