Sony Ericsson Z770 Trouble Shooting Guide

Trouble Shooting Guide, Electrical

Applicable for Z770i

Contents

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

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.........................................................................3

2.5 SIM........................................................................................................3

2.6 Open/close flip.......................................................................................3

2.7 Main/Sub Display..................................................................................3

2.8

Main/Sub Display LED.......................................................................... 3

2.9

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

2.10 Keypad Keys.........................................................................................4

2.11 Volume Up/Down Key...........................................................................4

2.12 Real Time clock.....................................................................................4

2.13 Polyphonic Speaker (Loudspeaker, Bas Speaker)................................4

2.14 Hands-Free (PHF) Aux Earphone.........................................................4

2.15 Microphone............................................................................................4

2.16 Hands-Free (PHF) Aux Microphone......................................................4

2.17 Camera..................................................................................................4

2.18 Memory Card.........................................................................................4

2.19 Bluetooth............................................................................................... 4

2.20 Fm Radio...............................................................................................4

2.21

Vibrator..................................................................................................4

2.22

Earphone...............................................................................................4

3 Repair Actions for Go/No Go Test Failures.................................................... 5

Trouble Shooting Guide, Electrical

1208-5031 REV4 Company Internal

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

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

1001-5712

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

1208-5031 REV4 Company Internal

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