Motorola A760 Service Manual

M

Dual Band Wireless Telephone

Level 1 and 2 Service Manual

A760

GSM 900/1800 MHz & GPRS Technologies

1 and 2
Table of Contents

Level 1 and 2 Service Manual Table of Contents

A760
6809464A70

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Product Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Product Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Product Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Regulatory Agency Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Computer Program Copyrights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

About this Service Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Warranty Service Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Parts Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

General Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Controls, Indicators, and Input/Output (I/O) Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Alert Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Battery Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Tools and Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Removing and Replacing the Battery Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Removing and Replacing the Battery Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Removing and Replacing the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Removing and Replacing the Subscriber Identity Module (SIM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Removing and Replacing the Stylus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Removing and Replacing the Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Removing and Replacing the Rear Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Removing and Replacing the Transceiver Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Removing and Replacing the Camera Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Removing and Replacing the Real Time Clock (RTC) Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Removing and Replacing the Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Removing and Replacing the Touch Screen Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Removing and Replacing the Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

SIM Cards and Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

SIM Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Personality Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Manual Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Manual Test Mode Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Programming: Software Upgrade and Flexing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Part Number Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Related Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Exploded View Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Exploded View Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index-1

6809464A70 August 26, 2003 3

Table of Contents Product Family A760

4 August 26, 2003 6809464A70

1 and 2

A760

Level 1 and 2 Service Manual Introduction

6809464A70

Introduction

Motorola® Inc. maintains a worldwide organization that is dedicated to provide
responsive, full-service customer support. Motorola products are serviced by an
international network of company-operated product care centers as well as
authorized independent service firms.

Available on a contract basis, Motorola Inc. offers comprehensive maintenance and
installation programs that enable customers to meet requirements for reliable,
continuous communications.

To learn more about the wide range of Motorola service programs, contact your local
Motorola products representative or the nearest Customer Service Manager.

Product Identification

Motorola products are identified by the model number on the housing. Use the entire
model number when inquiring about the product. Numbers are also assigned to
chassis and kits. Use these numbers when requesting information or ordering
replacement parts.

Product Names

Product names are listed on the front cover. Product names are subject to change
without notice. Some product names, as well as some frequency bands, are available
only in certain markets.

Product Changes

When electrical, mechanical or production changes are incorporated into Motorola
products, a revision letter is assigned to the chassis or kit affected, for example:

-A, -B, or -C.

The chassis or kit number, complete with revision number is imprinted during
production. The revision letter is an integral part of the chassis or kit number and
is also listed on schematic diagrams and printed circuit board layouts.

Regulatory Agency Compliance

This device complies with Part 15 of the FCC Rules. Operation is subject to the
following conditions:

• This device may not cause any harmful interference, and

• must accept interference received, including interference that may cause
undesired operation.

This class B device also complies with all requirements of the Canadian
Interference-Causing Equipment Regulations (ICES-003).

Cet appareil numérique de la classe B respecte toutes les exigences du Règlement
sur le matériel brouilleur du Canada.

6809464A70 August 26, 2003 5

6809464A70
A760

Introduction A760

1 and 2

Computer Program Copyrights

The Motorola products described in this manual may include Motorola computer
programs stored in semiconductor memories or other media that are copyrighted
with all rights reserved worldwide to Motorola. Laws in the United States and other
countries preserve for Motorola, Inc. certain exclusive rights to the copyrighted
computer programs, including the exclusive right to copy, reproduce, modify,
decompile, disassemble, and reverse-engineer the Motorola computer programs in
any manner or form without Motorola's prior written consent. Furthermore, the
purchase of Motorola products shall not be deemed to grant either directly or by
implication, estoppel, or otherwise, any license or rights under the copyrights,
patents, or patent applications of Motorola, except for a nonexclusive license to use
the Motorola product and the Motorola computer programs with the Motorola
product.

About this Service Manual

Using this service manual and the suggestions contained in it assures proper
installation, operation, and maintenance of A760 telephones. Refer questions about
this manual to the nearest Customer Service Manager.

Audience

This manual aids service personnel in testing and repairing A760 telephones.
Service personnel should be familiar with electronic assembly, testing, and
troubleshooting methods, and with the operation and use of associated test
equipment.

Use of this manual assures proper installation, operation, and maintenance of
Motorola products and equipment. It contains all service information required for
the equipment described and is current as of the printing date.

Scope

The scope of this document is to provide the basic information relating to A760
telephones, and also to provide procedures and processes for repairing the units at
Level 1 and 2 service centers including:

•Unit swap out

• Repairing of mechanical faults

• Basic modular troubleshooting

• Testing and verification of unit functionality

• Initiate warranty claims and send faulty modules to Level 3 or 4 repair centers

6 August 26, 2003 6809464A70

Level 1 and 2 Service Manual Introduction

Conventions

Special characters and typefaces, listed and described below, are used in this
manual to emphasize certain types of information.

➧

G
E

M

Note: Emphasizes additional information pertinent to the subject
matter.

Caution: Emphasizes information about actions that may result in
equipment damage.

Warning: Emphasizes information about actions that may result in
personal injury.

Keys to be pressed are represented graphically. For example, instead of “Press

the Menu key”, you will see “Press

Information from a screen is shown in text as similar as possible to what
appears in the display. For example, ALERTS or ALERTS or ALERTS.

Information that you need to type is printed in boldface type

M”.

Revisions

Any changes that occur after manuals are printed are described in publication
revision bulletins (PMRs). These bulletins provide change information that can
include new parts listing data, schematic diagrams, and printed circuit board
layouts.

Warranty Service Policy

The product comes with the standard 12-month warranty terms and conditions.
Accidental damage, misuse, and extended warranties offered by retailers are not
supported under warranty. Non warranty repairs are available at agreed fixed
repair prices.

Out of Box Failure Policy

The standard out of box failure criteria applies. Customer units that fail very early
on after the date of sale, are to be returned to Manufacturing for root cause analysis,
to guard against epidemic criteria. Manufacturing will bear the costs of early life
failure.

Product Support

Customer’s original units will be repaired but not refurbished as standard.
Appointed Motorola Service Hubs will perform warranty and non-warranty field
service for level 2 (assemblies) and level 3 (limited PCB component). The Motorola
High Technology Centers will perform level 4 (full component) repairs.

6809464A70 August 26, 2003 7

Introduction A760

Customer Support

Customer support is available through dedicated Call Centers and in-country help
desks. Product Service training should be arranged through the local Motorola
Support Center.

Ordering Replacement Parts

Only centers authorized to carry out repairs can purchase spare parts. Orders for
spare parts from hubs and Hi-Tech Centers should be placed with the regional
Motorola Parts Distribution Center.

Parts Replacement

When ordering replacement parts or equipment, include the Motorola part number
and description used in the service manual or supplement.

When ordering crystals or channel elements, specify the Motorola part number,
description, crystal frequency, and operating frequency desired.

When the Motorola part number of a component is not known, use the product model
number or other related major assembly along with a description of the related
major assembly and of the component in question.

In the U.S.A., to contact Motorola, Inc. on your TTY, call: 800-793-7834

Accessories and Aftermarket Division (AAD)

Replacement parts, test equipment, and manuals can be ordered from AAD.

U.S.A. Outside U.S.A.

Phone: [phone] Phone: [phone]

FAX: [phone] FAX: [phone]

To order spare parts in EMEA region call [phone].

To order spare parts in Asia region call [phone].

8 August 26, 2003 6809464A70

Level 1 and 2 Service Manual Specifications

Specifications

General Function Specification

Frequency Range GSM

Frequency Range DCS

Channel Spacing 200 kHz
Channels 174 EGSM, 374 DCS carriers with 8 ch. per carrier
Modulation GMSK at BT = 0.3
Transmitter Phase Accuracy 5 Degrees RMS, 20 Degrees peak
Duplex Spacing 45 MHz GSM, 95 MHz DCS
Frequency Stability ± 0.10 ppm of the downlink frequency (Rx)

Operating Voltage

Transmit Current Typically 350 mA average, 1.0 Amps peak
Stand-by Current Typically 5.0 mA (DRX2), 8.3 mA (DXR9)

Dimensions

Size (Volume) 95 cc (5.79 in
Weight 118 gm (4.1 oz) with battery
Temperature Range -10° C to +55° C (+15° F to +130° F)

Battery Life, 800 mAh
Lithium Ion Battery

880-915 MHz Tx (with EGSM)
925-960 MHZ Rx

1710-1785 MHz Tx
1805-1880 MHz Rx

+3.0V dc to +5.1V dc (battery)
+4.4V dc to +6.5V dc (external connector)

101 mm x 53 mm x 21 mm (3.9 inches X 2.1 inches X 0.8
inches)

Talk Time 180 to 300 minutes
Standby 95 to 160 hours

All talk and standby times are approximate and depend on
network configuration, signal strength, and features selected.
Standby times are quoted as a range from DRX=2 to DRX=9.
Talk times are quoted as a range from DTX off to DTX on.

3

)with battery

Transmitter Function Specification

RF Power Output 33 dBm nominal GSM, 30 dBm nominal DCS
Output Impedance 50 ohms nominal
Spurious Emissions -36 dBm from 0.1 to 1 GHz, -30 dBm from 1 to 4 GHz

Receiver Function Specification

Receive Sensitivity -102 dBm GSM, -103 dBm DCS
RX bit error rate (100k bits) Type II < 2%
Channel Hop Time 500 microseconds
Time to Camp Approximately 5-10 seconds

Speech Coding Function Specification

Speech Coding Type

Bit Rate 13.0 kbps
Frame Duration 20 ms
Block Length 260 bits
Classes Class 1 bits = 182 bits; Class 2 bits = 78 bits
Bit Rate with FEC Encoding 22.8 kbps

Regular pulse excitation / linear predictive coding with long
term prediction (RPE LPC with LTP)

6809464A70 August 26, 2003 9

Product Overview A760

Product Overview

Motorola A760 telephones are global system for mobile communications (GSM)
general packet radio service (GPRS) wireless application protocol (WAP)-enabled
mobile phones with full-featured personal information manager (PIM)
functionality. The A760 incorporates a large task-based touch screen user interface
(UI) featuring handwriting recognition for email and short message service (SMS)
text messaging. It is a tri-band phone that allows roaming within the GSM 900
MHz, and digital cellular system (DCS) 1800 MHz bands.

A760 telephones support GPRS, SMS, MMS in addition to traditional circuit
switched transport technologies.

A760 telephones have a clam form factor. They are made of a polycarbonate plastic
with the earpiece speaker located in the flip. The flip features a viewing window
that allows a portion of the display to be seen with the flip is closed. The bottom
part of the clam (front housing) contains the touch screen display, main printed
circuit board (PCB), microphone, external accessory connector, infrared (IR)
communications port, and headset jack. Also located in the front housing are the
voice, volume, power, page up, page down, and menu buttons, as well as the battery,
antenna, subscriber identity module (SIM) holder, and status light. A stylus, also
located in the front housing, is provided to aid manipulating the touch screen UI.

The A760 features a High definition display with a fine pitch 320 x 240 pixel high
color reflective TFT display to improve readability and useability.

The battery and battery door are integrated into a single unit to minimize overall
phone thickness. The phone accepts both 3V and 5V mini SIM cards which fit into
the SIM holder beneath the battery. The antenna is a fixed stub type antenna.

10 August 26, 2003 6809464A70

Level 1 and 2 Service Manual Product Overview

Features

Features available include:

• Phone first: looks and performs like a phone

• Linux OS

• J2ME™ MIDP 2.0

• Hands free speakerphone

• 65k color TFT touchscreen

• Touchscreen pen-based input with handwriting recognition

• Secure OTA synchronization of PIM & email to enterprise servers

• Supports MMS, high definition audio codecs (MIDI, AMR, MP3) in addition to
traditional SMS, concatenated SMS, cell broadcast messages, and 2D/3D
animation

• Polyphonic ringer tones (16 voice, 22kHz)

• Embedded MP3 player

• Embedded camera

• Embedded Bluetooth™

• MPEG4 playback

• 200 MHz processor

• 32 MB flash memory

• Embedded PIM and email clients with excellent UI and performance

• Tri-coder/decoder (CODEC) that allows full rate, half rate, and enhanced full
rate modes of transmission

• Integrated camera for still picture captures

• Expansion slot for IrDA, Bluetooth, Smart Module SD/MMC

• Supports GPRS, circuit switched, and SMS networks

• WAP 1.1.2 compliant

• 240 x 320 pixel touch screen color display

• Voice recorder personal memo feature

6809464A70 August 26, 2003 11

General Operation A760

General Operation

Controls, Indicators, and Input/Output (I/O) Connections

The A760 telephone’s controls are located on the front of the device
(see Figure 1). Controls on the front of the phone include a Power ON/OFF button,
Home Key, and a Up /Down key Soft Menu key on the left and right side. Indicators,
in the form of icons, are displayed on the LCD. Service status is indicated by a tri­color light emitting diode (LED) (not shown) located on top of the phone.
Additionally, I/O connectors consisting of a headset jack and an accessory port are
located on the top and bottom of the phone, respectively. See Figure 1.

Speaker

Volume

Up/Down

Keys

Microphone

Powe r

On/Off

Key

Charger/Accessory

Figure 1. Controls, Indicators, and I/O

Voice Notes
Key

320x240Pixel
Touch screen
Display

Home Key

Page

Up/Down

Key

Por t

020035-o

12 August 26, 2003 6809464A70

Level 1 and 2 Service Manual General Operation

Color Display

The color display provides a high resolution 240x320 touch screen display for easy
readability in all light conditions (see Figure 2).

The screen displays the main menu icons and all of the function group icons. You
can navigate around the touch screen using the stylus to select the desired
functions.

031658o

Figure 2. Sample Menu DIsplay

Display animation makes the phone’s menus move smoothly as the user scrolls up
and down.

➧

6809464A70 August 26, 2003 13

Whether a phone displays all indicators depends on the programming and services
to which the user subscribes.

General Operation A760

Table 1 shows some common icons displayed on the LCD.

Table 1. Icon Indicators and Description

Icon Description

Signal Strength Indicator. Shows the strength of the phone’s connection with the

network.

GPRS Indicator. Appears when the phone is in GPRS mode.

Bluetooth Indicator. Appears when a bluetooth accessory or device is wirelessly
connected.

GPRS Indicator. Appears when the phone is in GPRS mode.

12:26

Battery Level Indicator. Shows the amount of charge left in the battery. The more

segments visible, the greater the charge. Recharge the battery as soon as possible
when the Low Battery warning message appears.

Clock. Shows the current time. This is a network-dependent feature.

14 August 26, 2003 6809464A70