Sony Ericsson W300I Diagram

Trouble Shooting Guide, Electrical

Applicable for W300c, W300i

Contents

General.............................................................................................................................2

1 2

Repair Actions for Manual Test Failures.....................................................................3

2.1

Power On / Off ..................................................................................................3

2.2

Software Flash...................................................................................................3

2.3

Charging............................................................................................................3

2.4

Hands-Free connection (PHF)...........................................................................3

2.5

SIM....................................................................................................................3

2.6

Charging indicator (RED LED).........................................................................3

2.7

Display...............................................................................................................3

2.8

Display Illumination..........................................................................................3

2.9

External Display Illumination ...........................................................................3

2.10

Keypad LEDs ....................................................................................................3

2.11

Keypad Keys .....................................................................................................3

2.12

Volume Up Key.................................................................................................3

2.13

Volume Down Key............................................................................................3

2.14

Music Key .........................................................................................................3

2.15

Vibrator .............................................................................................................3

2.16

Earphone (Receiver, Flip Speaker)....................................................................4

2.17

Polyphonic Speaker (Loudspeaker, Base Speaker)...........................................4

2.18

Microphone .......................................................................................................4

2.19

Real Time Clock................................................................................................4

2.20

Camera...............................................................................................................4

2.21

Flip Sensor.........................................................................................................4

2.22

IR.......................................................................................................................4

2.23

Bluetooth...........................................................................................................4

2.24

Memory Card Reader........................................................................................4

2.25

FM Radio...........................................................................................................4

Repair Actions for Go/No Go Test Failures .................................................................4

Repair Actions for Calibration Routine Failures.........................................................5

4.1

GSM 850, 900, 1800, or 1900...........................................................................5

4.2

EDGE 850, 900, 1800, or 1900.........................................................................5

Revision History..............................................................................................................6

4/000 21-2/FEA 209 544/600 A

Sony Ericsson Mobile Communications AB

Trouble Shooting Guide, Electrical

1 General

The purpose of this document is to indicate the electrical level repair actions associated with the different failure symptoms.

For symptoms that have multiple repair actions, the repair actions are listed in order of their probability of creating a successful repair. The first action has the highest probability, and subsequent actions have lower probabilities. The intention is for the repair technician to implement the first repair action and then retest the phone. If the phone continues to fail the same test, then the technician should continue to the second repair action. If the phone continues to fail the same test after all of the repair actions are exhausted, then the phone will be considered not reparable at this level.

This document should be used only after the actions from the Mechanical Trouble Shooting Guide have been exhausted for the specific symptom.

Voltage, current, and resistance information is provided for some symptoms to enable faster repairs. Purchasing this equipment and performing these measurements is optional but recommended.

Perform current measurements using a dummy battery and power supply with digital current display. The phone should be fully assembled.

Perform voltage measurements with a multimeter.

Perform resistance measurements with a multimeter.

4/000 21-2/FEA 209 544/600 A

Sony Ericsson Mobile Communications AB

2(6)

+ 4 hidden pages