Motorola W370 User Manual

Level 1-2 Service Manual

W370/W375

Tri-Band Wireless Telephone

W370/W375

GSM 900/1800/1900

GSM850/1800/1900

Table of Contents W370/W375

Table of Contents

Introduction ................................................................................................................................... 3

Product Identification ............................................................................................................ 3

Product Names ..................................................................................................................... 3

Product Changes .................................................................................................................. 3

Regulatory Agency Compliance ........................................................................................... 3

Computer Program Copyrights ............................................................................................. 4

About This Service Manual ................................................................................................... 4

Warranty Service Policy ....................................................................................................... 5

Parts Replacement ............................................................................................................... 6

Specifications (W370/W375) ......................................................................................................... 7

Product Overview .......................................................................................................................... 9

Features ............................................................................................................................... 9

General Functions ....................................................................................................................... 11

Controls, Indicators, and Input/Output (I/O) Connectors .................................................... 11

User Interface Menu Structure ........................................................................................... 13

Battery Function ................................................................................................................. 14

Operation ............................................................................................................................ 14

Tools and Test Equipment ......................................................................................................... 14

Disassembly ................................................................................................................................ 15

Removing and Replacing the Battery ................................................................................. 16

Removing and Replacing the SIM Card ............................................................................. 17

Removing and Replacing the Bottom Housing ................................................................... 17

Removing and Replacing the Spk-gasket Vibrator,rubber pad,and Speaker ..................... 20

Removing and Replacing the Main Board and Keypad ...................................................... 22

Removing and Replacing the Top Housing ........................................................................ 27

Removing and Replacing the Top Clamshell ..................................................................... 30

Removing and Replacing the Bracket,Sub-Board,VGA module,and Receiver .................. 31

Remark ............................................................................................................................... 35

Subscriber Identity Module (SIM) and Identification Label ..................................................... 37

SIM ..................................................................................................................................... 37

Identification ....................................................................................................................... 37

Troubleshooting .......................................................................................................................... 39

W370/W375 Troubleshooting Chart ................................................................................... 39

Programming: Software Upgrade and Flexing ................................................................... 40

Part Number Charts .................................................................................................................... 41

Exploded View Parts List .................................................................................................... 43

Accessories ........................................................................................................................ 45

Index ............................................................................................................................................... 1

2 Aug.15, 2006

Level 1-2 Service Manual Introduction

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

The model number on a label (usually on the housing) identifies Motorola products. 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, and so on.
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 this device must accept
interference received, including interference that may cause undesired operation

• This class B device also complies with all requirements of the Canadian Interference­Causing Equipment Regulations (ICES-003).Cet appareil numérique de la classe B
respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.

Aug.15, 2006 3

Introduction W370\W375

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 Introduction 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 W370/W375 telephones. Refer questions about this manual to
the nearest Customer Service Manager. This manual contains mechanical service information
required for the equipment described and is current as of the printing date.

Audience

This document aids service personnel in testing and repairing W370/W375 telephones Service
personnel should be familiar with electronic assembly, testing, and troubleshooting methods,
and with the operation and use of associated test equipment.

Scope

This manual provides basic information relating to W370/W375 telephones, and also provides
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.

4 Aug.15, 2006

Level 1-2 Service Manual Introduction

Conventions

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

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.

M 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.

Information that you need to type is printed in boldface type.

M".

Warranty Service Policy

The product is sold 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 phones 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 to bear the costs of early life failure.

Product Support

The customer's original phones 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 Transceiver component). Motorola High Tech Centers will
perform level 4 (full component) repairs.

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.

Aug.15, 2006 5

Introduction W370\W375

Parts Replacement

When ordering replacement parts or equipment, include the Motorola part number and
description used in the service manual. 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. For EMEA spare
parts call [phone]. For Asia spare parts call [phone].

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

Phone: [phone] Phone: [phone]
FAX: [phone] FAX: [phone]

6 Aug.15, 2006

Level 1-2 Service Manual Specifications (W370/W375)

Specifications (W370/W375)

General Functions Specification

Dimensions 99*45*18.6mm

Weight 95g

External LCD 65K color TFT,

Active area 28.032 x 35.04mm,
Pixel Resolution: 128(RGB)x160

Sub-LCD N/A

Band "EGSM/DCS/PCS" or

"GSM850//DCS/PCS"

Battery 850mAh Li Ion battery

Product type Clamshell

Antenna Internal

Frequency Range (EGSM) Tx 880-915MHz, Rx 925-960MHz

Frequency Range (DCS) Tx 1710-1785MHz, Rx 1805-1880MHz

Frequency Range (GSM850) Tx 824-849MHz, Rx 869-894MHz

Frequency Range (PCS) Tx 1850-1910MHz, Rx 1930-1990MHz

Channel Spacing 200kHz

Channels 174 in EGSM, 124 in GSM859;

374 in DCS, 299 in PCS

Modulation GMSK at BT=0.3

Transmitter Phase Accuracy 5 degrees RMS, 20 degrees peak

Duplex spacing 45MHz EGSM/GSM850, 95MHz DCS,

80MHz PCS

Frequency Stability +/- 0.1ppm of downlink frequency (RX)

Operating voltage 3.53V ~ 4.2V

Average Transmit Current Power Level 5: 280mA,

Power Level 19: 115mA

Average Standby Current DRX2: 6.5mA, DRX9: 3mA

FM Radio Frequency Range 87.5-108MHz

Operating Temperature -10°C to 55°C

Storage Temperature -40°C to 85°C

Battery Life Talking time: 4.2~8.24 hours; Standby

time: 130~293 hours

Battery Charge Time 240 Mins to 90% 850mAH Capacity

Alert Volume Max 95dB@ 5 cm, 0.5 watts input

Aug.15, 2006 7

Specifications (W370/W375) W370\W375

Transmitter Functions Specification

RF Power Output EGSM/GSM850: 32.5dBm (TYP),

DCS/PCS: 30dBm (TYP)

Output Impedance 50 ohm (TYP)

Spurious Emissions -36 dBm from 0.1 to 1GHz,

-30 dBm from 1 to 4GHz

Receiver Functions Specification

Receiver Sensitivity EGSM/GSM850: -107dBm,

DCS/PCS: -106dBm

RX Bit Error Rate (100K bits) type II <2%

Channel Hop Time 500 microseconds

Time to Camp Approximately 6~10 Second

Speech Coding Functions Specification

Speech Coding Type Regular pulse excitation/linear predictive

coding with long term prediction (PRE
LPC with LTP)

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

8 Aug.15, 2006

Level 1-2 Service Manual Product Overview

Product Overview

The Motorola W370/W375 features a global system for mobile communications wireless
interface and general packet radio service (GPRS) transport technology. It also features a
simplified icon and graphical user interface (UI) for easier operation in addition to short
message service text messaging (SMS), speed dialing, quick dialing, an alarm, a calculator,
games, and an address book. The W370/W375 is a tri-band phone that allows for roaming
within the EGSM900 / DCS1800/PSC1900 or GSM850 / DCS1800/PCS1900.

W370/W375 telephones support GPRS class 8 and SMS in addition to traditional circuit
switched transport technologies. GPRS, where available, provides substantial increases in
mobile data communications performance and the efficient use of radio spectrum. Data
transmission rates for GSM networks can potentially increase from the current rate of 9.6 kbps
up to a theoretical maximum of 171.2 kbps. An increased data rate is by no means the only
benefit provided by GPRS. A key advantage is the provision of a permanent virtual connection
to the network. This "always on" connection is possible because GPRS uses packet data
transfer so that, for example, email can be downloaded in "background mode." There is no
need for the user to reconnect before requesting a service, eliminating connection set-up delays
and adding convenience and immediacy to data services access. The "virtual" nature of this
connection means that network resources are not consumed during periods when a user is not
actually sending or receiving data.

The telephones are made of plastic. The display and speaker, as well as the 25- key keypad,
transceiver printed circuit board (PCB), microphone, charger and headphone connectors, and
power button are contained within clam shell form-factor housing. The userreplaceable 850
mAh Lithium-Ion (Li-Ion) battery provides up to 4.2-8.24 hours of talk time with up to 130­293 hours of standby time. The phone accepts 1.8V/3V mini subscriber identity module (SIM)
cards that fit into the SIM holder next to the battery. These telephones feature a 128 x 160 pixel
color graphics display and an internal antenna.

Features

W370/W375 telephones use advanced, self-contained, sealed, custom integrated circuits to
perform the complex functions required for GSM GPRS communication. Aside from the space
and weight advantage, microcircuits enhance basic reliability, simplify maintenance, and
provide a wide variety of operational functions.

Features available in this family of telephones include:

• A 128 x 160 pixel color graphics display

• Internal antenna

• Caller line identification (CLI) (Network, subscription and SIM card or service provider
dependent feature. Not available in all areas.)

• Lower voltage technology that provides increased standby and talk times

• Extended GSM (EGSM) channels

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

• Display animation

•VibraCall

• 5-Way navigation key

• Simplified text entry using iTAP™ predictive text entry

• SIM Toolkit™ Class 2 (STK) (Network, subscription and SIM card or service provider
dependent feature. Not available in all areas.)

®

vibrating alert

Aug.15, 2006 9

Product Overview W370\W375

• Backlight

• Speed-, Quick- and One-Touch dialing

• Call Forwarding and Holding

• Customized Menus

• Personal management tools calculator with currency converter, real time clock with date,
reminders, and caller profiling

• Other features

Caller Line Identification

Upon receipt of a call, the calling party's phone number is compared to the phone book. If the
number matches a phone book entry, that name will be displayed. If there is no phone book
entry, the incoming phone number will be displayed. In the event that no caller identification
information is available, an incoming call message is displayed.

Simplified Text Entry

The W370/W375 features iTAP™ predictive text entry. Press a key to generate a character and
a dynamic dictionary uses this to build and display a set of word or name options. The iTAP™
feature may not be available on the phone in all languages.

SIM Toolkit™ - Class 2

SIM Application Toolkit is a value-added service delivery mechanism that allows GSM
operators to customize the services they offer their customers, from the occasional user who
requests sports news and traffic alerts, to a high call time business user who receives stock
alerts and checks flight times. Operators can now create their own value-added services menu
quickly and easily in the phone.

The customized menu will appear as the first menu and may be updated over-the-air with new
services when customers request them.

Other Features

Detailed descriptions of the other features can be found in the appropriate W370/W375
telephone user guides listed in the Related Publications section at the end of this manual.

10 Aug.15, 2006

Level 1-2 Service Manual General Functions

General Functions

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

The W370/W375 phone's controls are located on the front side of the device and on the
keyboard as shown in below. Indicators icons are displayed on the LCD.

Open a menu when it

Menu Key

appears in the display.

Left Soft Key

Perform functions identified

by left display prompt.

Web Browser Key

Volume Controls

Send/Answer Key

Make & answer calls. Press

in idle screen to see the

recently dialed calls.

Mini-USB Connector

Change the battery or

connect to a PC.

Listen to your voice calls

Earpiece

& messages.

Right Soft Key

Perform functions identified by
right display prompt.

Message Key

Access the Message menu.

Power/End Key

Press & hold to turn the phone
on/off. Press & release to end
phone calls, exit menu system.

Navigation Key

Scroll up, down, left or right.

Headset Jack

Battery Indicator

Message Indicator

Call Indicator

Camera Lens

Battery

Headset Jack

Insert the headset

accessory for

handsfree use.

Figure 1. Phone Controls

Menu Navigation

W370/W375 telephones are equipped with a simplified icon and graphical-based user
interface. See the table below for details of the W370/W375 menu structure. A five-way
navigation key allows you to move easily through menus and confirm your selection.

Aug.15, 2006 11

General Functions W370\W375

Liquid Crystal Display (LCD)

The LCD provides a multicolor backlit color display with user-adjustable contrast settings for
optimum readability in all light conditions. The bit-map 128 x 160 pixel display includes up to
3 lines of text, 1 line of icons, and 1 line of prompts.

Home Screen Display

Clock

Menu indicator

Icon Name Description

Signal Strength

GPRS Service
Available Indication

Data Connection
Status

Security Link If the browser link is a security web site.

Data Transmition

Roam If user roam to another network.

On Call If a phone call is connected.

Activate Line

Call Forward

Message Indicator

Alert Indicator

Battery level
Indicator

Headset Indicator Shows the phone is connecting with headset.

Vertical bars show the strength of the network
connection.

If user is at a GPRS service available area.

if user choses CSD bear type as data connection bear.
If user choses GPRS bear type as data connection bear.
If user activates GPRS service.

If data is transmitting over GPRS connection.
If data is transmitted finishedly over GPRS connection.

The activate line is line1.
The activate line is line2.

Line1 is set as call forward.
Line2 is set as call forward.

New chat message.

New Voice Mail received.

New Voice Mail and Message received.

New Text/MMS/WAP Push message received.

Message Full

RingStyle set as LoudRing.
RingStyle set as SoftRing.
RingStyle set as Vibrate.
RingStyle set as Vibrate And Ring.
RingStyle set as VibrateThenRing.
RingStyle set as Silent.

Vertical bar shows the battery level.

Right Soft Key LabelLeft Soft Key Label

Figure 2. LCD Icons

12 Aug.15, 2006

Level 1-2 Service Manual General Functions

User Interface Menu Structure

The table below shows a portion of the W370/W375 telephone menu structure.

Menu Map

n Phonebook
s Recent Calls

• Received calls

• Dialed Calls

• NotePad

•Call Times

• Call Cost

• Date Times

• Date Volumes

e Messages

• Create

• Inbox

•Draft

• Outbox

• Quick Notes

•Voicemail

• Browser Msgs

• Info Services

•MMS Templates

É Office Tools

• Calculator

•MyMenu

• Alarm Clock

• Stop Watch

•Chat

• Dialing Services

•STK Service

• Calendar

• Lantern

Q Games & Apps

• Football

•Space

•Crazy

• Sound Settings

á Web Access

• Start Browser

• Web Shortcut

• Go to URL

• Web Session

• Stored Pages

•History

• General Setting

h Multimedia

• Camera

•Pictures

• Sounds

•FM Radio

l Personalize

• Home Screen

• Main Menu

• Color Setting

• Greeting

• Wallpaper

• Screen Saver

• Quick Dial

w Settings

• Ring Style

• Call Forward

• In Call Setup

• Initial Setup

• Phone Status

• Headset

•Network

•Security

• Easy Prefix

•Lantern

Note: The STK Service depends on your carrier’s SIM card. You may not see
this function. Chat, Quick Dial and Easy Prefix depend on your carrier’s set­tings.. You may not see these features in your phone.

Figure 3. Telephone Menu Structure

Aug.15, 2006 13

Tools and Test Equipment W370\W375

Battery Function

The telephone displays a battery charge indicator icon in the idle screen to indicate the battery
charge level. The gauge shows four levels: 100%, 66%, 33%, and Low Battery.

Removing the battery causes the phone to shut down immediately and loose any pending work
(partially entered phone book entries or outgoing messages, for example).

Note: All batteries can cause property damage and/or bodily injury such as burns if a
conductive material such as jewelry, keys, or beaded chains touches exposed terminals. The
conductive material may complete an electrical circuit (short circuit) and become quite hot.
Exercise care in handling any charged battery, particularly when placing it inside a pocket,
purse, or other container with metal objects.

If the battery is removed while receiving a message, the message is lost.

To ensure proper memory retention, turn the phone OFF before removing the battery.
Immediately replace the old battery with a fresh battery.

Operation

For detailed operating instructions, refer to the appropriate User Guide listed in the Related
Publications section toward the end of this manual.

Tools and Test Equipment

The table below lists the tools and test equipment used on W370/W375 telephones. Use either
the listed items or the equivalent.

Table 1: General Test Equipment and Tools

Motorola Part Number

See Table 6 Charger

0180386A82 Antistatic Mat Kit (includes 66-80387A95

- Antistatic Gloves Provides protection from damage to

8102430Z04 GSM / DCS / PCS Test SIM Used to enable manual test mode

6680388B67 Disassembly tool, plastic with flat and

1

antistatic mat, 66-80334B36 ground
cord, and 42-80385A59 wrist band)

pointed ends (manual opening tool)

Description Application

Used to charge battery and power phone

Provides protection from damage to
phone caused by electrostatic discharge

(ESD)

phone caused by electrostatic discharge
(ESD)

Used during assembly/disassembly

6680388B01 Tweezers, plastic Used during assembly/disassembly

- T5 screw driver Used with screw driver

- camera jig Used to remove a built-in camera

14 Aug.15, 2006

(where present)

Level 1-2 Service Manual Disassembly

Table 1: General Test Equipment and Tools

Motorola Part Number

HP34401A

1. To order in North America, contact Motorola Aftermarket and Accessories Division (AAD) by phone at [phone] or
FAX [phone]. Internationally, AAD can be reached by calling [phone] or by fax [phone].

2. Not available from Motorola. To order, contact Hewlett Packard at [phone].

1

2

Digital Multimeter Used to measure battery voltage

Description Application

Disassembly

Figure 4. A screwdriver (T5), a pair of tweezers, and a camera jig

Note: This particular camera requires a unique camera jig (pictured on the far right) for disas­sembly of the camera, where present. You can order this tool from Motorola using the informa­tion presented above in Footnote 1.

Many of the integrated devices used in this phone are vulnerable to damage from electrostatic
discharge (ESD). Ensure adequate static protection is in place when handling, shipping, and
servicing any internal components.

Avoid stressing the plastic in any way to avoid damage to either the plastic or internal
components.

Aug.15, 2006 15

Disassembly W370\W375

Removing and Replacing the Battery

All batteries can cause property damage and/or bodily injury such as burns if a conductive
material such as jewelry, keys, or beaded chains touches exposed terminals. The conductive
material may complete an electrical circuit (short circuit) and become quite hot. Exercise
carein handling any charged battery, particularly when placing it inside a pocket, purse, or
other container with metal objects.

1. Ensure the phone is turned off.

2. Press the battery cover release button and then slide it away.

Figure 5. Opening the battery cover

3. Next, push the battery inward, and as it disengages pull it up and away from the battery
compartment.

Figure 6. Removing the battery

16 Aug.15, 2006