Sony C2104 User manual

1273-2281 Rev2
 Sony Mobile Communications AB – Company Internal
Troubleshooting Guide
- mechanical -
C2104,C2105,S36h

Troubleshooting Guide (mech)
1273-2281 Rev2
 Sony Mobile Communications AB –
Company Internal
2(48)
CONTENTS
1 Problem Areas................................................................................4
1.1 Power....................................................................................................4
1.1.1 Will not power on or will switch off randomly...........................................4
1.2 Keys ......................................................................................................5
1.2.1 Back/Home/Menu Keys...............................................................................5
1.2.2 Volume Key..................................................................................................5
1.2.3 On/Off Key....................................................................................................6
1.2.4 Camera Key..................................................................................................8
1.3 Touch Screen .....................................................................................10
1.3.1 Touch Screen malfunction........................................................................10
1.4 Display................................................................................................11
1.4.1 Graphics & Illumination ............................................................................11
1.5 LED/Illumination.................................................................................12
1.5.1 LED/Illumination........................................................................................12
1.6 Speaker...............................................................................................14
1.6.1 Speaker.......................................................................................................14
1.7 Earphone ............................................................................................17
1.7.1 Earphone....................................................................................................17
1.8 Microphone.........................................................................................18
1.8.1 Main Microphone.......................................................................................18
1.8.2 Secondary Microphone.............................................................................20
1.9 Vibrator...............................................................................................21
1.9.1 Vibrator not generating alerts ..................................................................21
1.10 Camera................................................................................................22
1.10.1 Camera defects..........................................................................................22
1.10.2 Secondary Camera....................................................................................23
1.11 Flash LED ...........................................................................................24
1.11.1 Flash LED not flashing..............................................................................24
1.12 Bluetooth and WLAN .........................................................................25
1.12.1 Bluetooth or WLAN connection failure....................................................25
1.13 GPS .....................................................................................................26
1.13.1 GPS malfunctions......................................................................................26
1.14 Compass.............................................................................................27
1.14.1 Compass fails............................................................................................27
1.15 Accelerometer....................................................................................28
1.15.1 Accelerometer test fails............................................................................28
1.16 Ambient Light Sensor........................................................................29
1.16.1 Ambient Light Sensor ...............................................................................29
1.17 Proximity Switch................................................................................30
1.17.1 Proximity Switch........................................................................................30
1.18 Real Time Clock .................................................................................31
1.18.1 Real Time Clock test fails .........................................................................31

Troubleshooting Guide (mech)
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1.19 Total call time.....................................................................................32
1.19.1 Total call time fails ....................................................................................32
1.20 External Memory................................................................................33
1.20.1 Memory Card not detected .......................................................................33
1.21 Security...............................................................................................34
1.21.1 Security fails..............................................................................................34
1.22 FM Radio.............................................................................................35
1.22.1 No/Poor FM Radio reception ....................................................................35
1.23 Battery Test ........................................................................................36
1.23.1 Battery Test Fails.......................................................................................36
1.24 Verify Certificates...............................................................................37
1.24.1 Verify certificates fails...............................................................................37
1.25 NFC Test.............................................................................................38
1.25.1 NFC Test fails.............................................................................................38
1.26 RX Diversity Test................................................................................39
1.26.1 RX Diversity Test fails...............................................................................39
1.27 Network & Signal................................................................................40
1.27.1 No/Poor signal...........................................................................................40
1.28 SIM ......................................................................................................42
1.28.1 SIM not detected........................................................................................42
1.28.2 Incorrect SIM-Card adapter.......................................................................43
1.28.3 Incorrect SIM indicated.............................................................................43
1.29 Charging.............................................................................................44
1.29.1 Battery will not charge..............................................................................44
1.30 HandsFree by Wire.............................................................................46
1.30.1 Connection to Portable HandsFree fails..................................................46
1.31 Data Communication .........................................................................47
1.31.1 Data transfer via System Connector fails................................................47
2 Revision History...........................................................................48
Note: In C2104/C2105/S36h product, whenever replacing Front Housing LCM TP Assembly or
Board swap after repair, it is mandatory to Calibrate the Touch Panel/ Proximity sensor/Light
sensor (1275-0758 Trouble Shooting Application – mechanical).

Troubleshooting Guide (mech)
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1 Problem Areas
1.1 Power
1.1.1 Will not power on or will switch
off randomly
Check:
Check whether the phone vibrates by pressing the on/off
key.
Action:
If activation of the vibrator is detected, refer to section 1.4
‘Display’.
Check:
Inspect the contact pads on the battery.
Action:
1. If dirty or oxidized – clean the pads.
2. If damaged – replace the battery.
Check:
Inspect the battery contact pins.
Action:
1. If dirty or oxidized – clean the contact pins.
2. If adhesive is detected on the contact pins, use an eraser
to gently rub off the adhesive.
3. If damaged – Replace Main PBA.
Check:
Inspect the on/off key.
Action:
1. Refer to section 1.2.3 ‘Key On/Off’.
2. Replace Main PBA.

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Problem Areas
1.2 Keys
1.2.1 Back/Home/Menu Keys
Check:
Inspect the Back /Home/Menu keys on Display.
Action:
1. Refer to the section 1.3 ‘Touch Screen’.
2. Replace Main PBA.
1.2.2 Volume Key
Check:
Inspect the external area of the volume key.
Action:
If dirty – clean it.
Check:
Inspect the volume key switch on Main PBA.
Action:
1. If dirty – clean them.
2. If the volume key is damaged – replace the Battery Cover.

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Problem Areas
Check:
Inspect the Film Side Key FPC on main PBA.
Action:
1. If Missing or damaged – replace it.
2. If the volume key switch is damaged – replace Main PBA.
1.2.3 On/Off Key
Check:
Inspect the external area of the on/off key.
Action:
If dirty – clean it.
Check:
Inspect the on/off key on Middle Frame Assembly.
Action:
1. If dirty or stuck – clean and reassemble it.

Troubleshooting Guide (mech)
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Problem Areas
2. If the on/off key is damaged – replace the Power Key.
Check:
Inspect the on/off key dome on Side FPC.
Action:
1. If dirty or oxidized – clean it.
Check:
Inspect the BtB connector on Side FPC to Main PBA.
1. If not properly connected – disconnect and reconnect.
2. If the Side FPC is defective, replace the Front Housing
LCM TP Assembly.
3. Replace Main PBA.
Note: Calibrate the Touch Panel/P-sensor/L-sensor 1275-0758
Trouble Shooting Application – mechanical.

Troubleshooting Guide (mech)
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Problem Areas
1.2.4 Camera Key
Check:
Inspect the external area of the Camera key.
Action:
If dirty – clean it.
Check:
Inspect the Camera key Dome.
Action:
1. If dirty or oxidized – clean it.
2. If the Camera key is damaged – replace the Battery
Cover.
Check:
Inspect the Camera key dome on Side FPC.
Action:
1. If dirty or oxidized – clean it.

Troubleshooting Guide (mech)
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Problem Areas
Check:
Inspect the BtB connector on Side FPC to Main PBA.
1. If not properly connected – disconnect and reconnect.
2. If the Side FPC is defective, replace the Front Housing
LCM TP Assembly.
3. Replace Main PBA.
Note: Calibrate the Touch Panel/P-sensor/L-sensor 1275-0758
Trouble Shooting Application – mechanical.

Troubleshooting Guide (mech)
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Problem Areas
1.3 Touch Screen
1.3.1 Touch Screen malfunction
Check:
Inspect the touch screen on the Front Housing LCM TP
Assembly
Action:
If dirty – clean it.
If: The end user has complained about unexpected behavior of the
touch screen or the touch keys.
Action:
Calibrate the Touch Panel 1275-0758 Trouble Shooting
Application – mechanical.
Check:
Inspect the BtB connector of the Front Cover Display
Assembly to the main PBA.
Action:
1. If not properly connected – disconnect and reconnect.
2. If dirty or oxidized – clean it.
3. If the touch screen or the TP FPC is damaged – replace
the Front Housing LCM TP Assembly.
4. Replace Main PBA.
Note: Calibrate the Touch Panel/P-sensor/L-sensor 1275-0758
Trouble Shooting Application – mechanical.

Troubleshooting Guide (mech)
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Problem Areas
1.4 Display
1.4.1 Graphics & Illumination
Check:
Check whether the phone vibrates after the on/off key has
been pressed.
Action:
If the activation described above is not detected, refer to
section 1.1 ‘Power’.
Check:
Inspect the BtB connector of the LCM to the main PBA.
Action:
1. If not properly connected – disconnect and reconnect.
2. If dirty or oxidized – clean it.
3. If the display or the LCM FPC is damaged – replace the
Front Housing LCM TP Assembly
4. Replace Main PBA.
Note: Calibrate the Touch Panel/P-sensor/L-sensor 1275-0758
Trouble Shooting Application – mechanical.

Troubleshooting Guide (mech)
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Problem Areas
1.5 LED/Illumination
1.5.1 LED/Illumination
Check:
Inspect the external window area of the LED on the Front
Housing LCM TP Assembly
Action:
1. If dirty – clean it.
2. If the external window area is damaged – replace the
Front Housing LCM TP Assembly.
Note: Calibrate the Touch Panel/P-sensor/L-sensor 1275-0758
Trouble Shooting Application – mechanical.
Check:
Inspect the LED on the Sub PBA Assembly and the Front
Housing LCM TP Assembly
Action:
1. If dirty or clogged – clean them.
2. If the Sub PBA Assembly is damaged – replace it.

Troubleshooting Guide (mech)
1273-2281 Rev2
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Problem Areas
Check:
Inspect the BtB connectors of Side Key FPC on both Sub
PBA Assembly and Main PBA.
Action:
1. If not properly connected – disconnect and reconnect.
2. If dirty or oxidized – clean it.
3. If the Side key FPC is defective, replace the Front
Housing LCM TP Assembly.
4. Replace Main PBA.
Note: Calibrate the Touch Panel/P-sensor/L-sensor 1275-0758
Trouble Shooting Application – mechanical.

Troubleshooting Guide (mech)
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Problem Areas
1.6 Speaker
1.6.1 Speaker
Check:
Inspect the Loudspeaker’s external port on the Battery
Cover.
Action:
1. If the Loudspeaker external port is clogged – clean it.
2. If the Loudspeaker external port is damaged – replace the
Battery Cover.
Check:
Inspect the mesh of the Loudspeaker on the Middle Frame
Assembly.
Action:
1. If dirty – clean it.
2. If the mesh is damaged – replace the Middle Frame
Assembly.

Troubleshooting Guide (mech)
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Problem Areas
Check:
Inspect the Loudspeaker’s pins and the pads on the Sub
PBA Assembly.
Action:
1. If dirty – clean them.
2. If the pins of the Loudspeaker are damaged – replace the
Loudspeaker.
Check:
Inspect the BtB connectors of Side Key FPC on both Sub
PBA Assembly and Main PBA.
Action:
1. If not properly connected – disconnect and reconnect.
2. If dirty or oxidized – clean it.
3. If the pads or the BtB connector of the Sub PBA
Assembly is damaged – replace the Sub PBA Assembly.

Troubleshooting Guide (mech)
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Problem Areas
3. If the Side key FPC is defective, replace the Front
Housing LCM TP Assembly.
4. Replace Main PBA.
Note: Calibrate the Touch Panel/P-sensor/L-sensor 1275-0758
Trouble Shooting Application – mechanical.

Troubleshooting Guide (mech)
1273-2281 Rev2
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Problem Areas
1.7 Earphone
1.7.1 Earphone
Check:
Inspect the Receiver’s external port on the Front Housing
LCM TP Assembly
Action:
1. If clogged – clean it.
2. If the port is damaged – replace the Front Housing LCM
TP Assembly.
Note: Calibrate the Touch Panel/P-sensor/L-sensor 1275-0758
Trouble Shooting Application – mechanical.
Check:
Inspect the Receiver’s pins and the contact pins on the main
PBA.
Action:
1. If dirty – clean them.
2. If the pins of the Receiver are damaged – replace the
Receiver.
3. Replace Main PBA.

Troubleshooting Guide (mech)
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Problem Areas
1.8 Microphone
1.8.1 Main Microphone
Check:
Inspect the Microphone’s external port on the Front Housing
LCM TP Assembly
Action:
If clogged – clean the port.
Check:
Inspect the Rubber hole locating direction for Main MIC.
Action:
1. If clogged – clean it.
Check:
Inspect the microphone on the Sub PBA Assembly and the
Mic mesh on the Front Housing LCM TP Assembly
Action:
1. If dirty – clean them.
Check:
Inspect the BtB connectors of Side Key FPC on both Sub
PBA Assembly and Main PBA.
Action:
1. If not properly connected – disconnect and reconnect.
2. If dirty or oxidized – clean it.

Troubleshooting Guide (mech)
1273-2281 Rev2
 Sony Mobile Communications AB –
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Problem Areas
3. If the Side key FPC is defective, replace the Front
Housing LCM TP Assembly.
4. Replace Main PBA.
Note: Calibrate the Touch Panel/P-sensor/L-sensor 1275-0758
Trouble Shooting Application – mechanical.

Troubleshooting Guide (mech)
1273-2281 Rev2
 Sony Mobile Communications AB –
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Problem Areas
1.8.2 Secondary Microphone
Check:
Inspect the Microphone’s external port on the Front Housing
LCM TP Assembly
Action:
If clogged – clean the port.
Check:
Inspect the microphone hole on Middle Frame Assembly
and Battery cover.
Action:
1. If dirty – clean them.
Check:
Inspect the hole of Rubber 2
nd
MIC and its direction.
Action:
1. If dirty or direction wrong – clean and reassemble it.
2. If the rubber is damaged – replace it.
Check:
Inspect the 2
nd
MIC on Main PBA.
Action:
1. If defective or damaged, replace Main PBA.