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

Level 1-2 Service Manual Disassembly

There is a danger of explosion if the Lithium ion battery is replaced incorrectly.
Replace only with the same type of battery or equivalent as recommended by the battery
manufacturer.Dispose of used batteries according to the manufacturer's instructions.

Removing and Replacing the SIM Card

1. Remove the battery, as described earlier.

2. Remove the SIM from its holder by sliding it in the direction shown below.

Figure 7. Removing the SIM Card

3. To replace, carefully slide the SIM into position in its socket.
The latch secures the SIM when correctly positioned over the terminals in the phone.

4. Replace the battery.

Removing and Replacing the Bottom Housing

1. Remove the SIM as described earlier.

2. Remove the cap.

Figure 8. Removing the cap

Aug.15, 2006 17

Disassembly W370\W375

3. Remove the two T5 screws. (Use torque force of 10.78 Ncm).

Figure 9. Removing the screws

4. Remove the four T5 screws. (Use torque force of 10.78 Ncm) .

(Figure 10. Removing the screws

18 Aug.15, 2006

Level 1-2 Service Manual Disassembly

5. Push housing to separate the latch.

Latch

Figure 11. Disengaging the latches

6. Use one hand to grip the case firmly and pry it apart a fraction, then disengage 2 latches
connecting it to the front housing.

Figure 12. Disengaging the latches

Aug.15, 2006 19

Disassembly W370\W375

7. Pry the back housing away from the front.

Figure 13. Separating the back housing

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

1. Remove the bottom housing as described earlier.

2. Remove the spk-gasket.

Figure 14. Removing the Spk-gasket

20 Aug.15, 2006

Level 1-2 Service Manual Disassembly

3. Remove the vibrator.

Figure 15. Removing the vibrator

4. Remove the two rubber pad.

Figure 16. Removing the rubber pad

Aug.15, 2006 21

Disassembly W370\W375

5. Insert a thin screwdriver or tweezers beneath the speaker chip, then gently pry it out.

Figure 17. Removing the speaker chip

Removing and Replacing the Main Board and Keypad

1. Remove the bottom housing as described earlier.

2. Use hand tooling pry out the conduct.

3. Need to replacing new conduct P/N#306AH80001W after repair process.

Figure 18. Removing the conduct

22 Aug.15, 2006

Level 1-2 Service Manual Disassembly

4. Remove the side rubber.

Figure 19. Removing the side rubber

5. Pry off the FPC connector.

Figure 20. Prying off the FPC connector

Aug.15, 2006 23

Disassembly W370\W375

6. Remove the main board.

Figure 21. Remove the main board

7. Push two clip to pry off the antenna.

Figure 22. Prying the antenna

24 Aug.15, 2006

Level 1-2 Service Manual Disassembly

8. Pry off the microphone.

Figure 23. Prying the microphone

9. Pry off the spring, carefully when Removing and replacing spring.

Figure 24. Prying the spring

Aug.15, 2006 25

Disassembly W370\W375

10. Remove the keypad.

Figure 25. Removing the keypad

11. Remove the lanyard.

Figure 26. Removing the lanyard

26 Aug.15, 2006

Level 1-2 Service Manual Disassembly

Removing and Replacing the Top Housing

1. Remove the main board and keypad as described earlier.

2. Use hand tooling remove four rubber cover.

Figure 27. Remove four rubber cover

3. Remove four T5 screws. (Use torque force of 10.78 Ncm)

Figure 28. Removing the four T5 screws

Aug.15, 2006 27

Disassembly W370\W375

4. With a flat pry bar, disconnect the two halves.

Figure 29. Disconnecting the two halves

5. Disconnect the two halves (they are joined by a total of 7 latches).

Figure 30. Separate the top housing

28 Aug.15, 2006

Level 1-2 Service Manual Disassembly

6. Remove the rubber.

Figure 31. Removing the rubber

7. Use hand tooling remove the HINGE-KB.
Be sure you don't inadvertently damage the FPC.

Figure 32. Removing the rubber

Aug.15, 2006 29

Disassembly W370\W375

Removing and Replacing the Top Clamshell

1. Remove the Top Housing as described earlier.

2. Insert a hook into the left hinge space, press down, and then exert pressure by pressing
the clamshell forward.

Figure 33. Exerting pressure on the clamshell

3. Gently disconnect the top clamshell, being careful to not snag or damage the FPC as it
slips out of the notch that protects it.

Figure 34. Disconnecting the top clamshell

30 Aug.15, 2006

Level 1-2 Service Manual Disassembly

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

1. Remove the top clamshell as described earlier.

2. Remove the conduct.

3. Need to replacing new conduct P/N#306AH80001W after repair process.

Figure 35. Removing the conduct

4. Pry off the FPC connector.

Figure 36. Prying off the FPC connector

Aug.15, 2006 31

Disassembly W370\W375

5. Disengaging the three latches.

Figure 37. Disengaging the latches

6. Disengaging the three latches.

Figure 38. Separating the bracket

32 Aug.15, 2006

Level 1-2 Service Manual Disassembly

7. Pry off the Sub-board.

Figure 39. Removing the sub-board

8. Pry off the VGA FPC connector and remove VGA module.

Figure 40. Prying off the VGA module

Aug.15, 2006 33

Disassembly W370\W375

9. Pop out the receiver.
If you remove a functioning receiver, you will irreparably damage it and must therefore

replace it.

Figure 41. Removing the receiver

34 Aug.15, 2006

Level 1-2 Service Manual Disassembly

Remark

1. In the event the SIM Card warps after being inserted. (shown as Figure 42 below)

Figure 42.

2. Solution : The angle of insertion must be lower than the surface of the Shielding Can, when
the factory disassembles the Shielding Can to rework. (shown in the following figure)

OK

the surface of
Shielding Can

This shear plane must be lower
than that of Shielding Can.

NG

Figure 43.

Aug.15, 2006 35

Disassembly W370\W375

3.1 Cover the shielding case(P/N:3052H80005W) as the figure 44.

Figure 44.

3.2 Stick the black mylar(P/N:3064H80001W) on the surface of shielding case as the figure 45.

Figure 45.

36 Aug.15, 2006

Level 1-2 Service Manual Subscriber Identity Module (SIM) and Identification Label

Subscriber Identity Module (SIM) and Identification Label

SIM

A SIM is required to access the existing local GSM network, or remote networks when
traveling (if a roaming agreement has been made with the provider).

The SIM contains:

• All the data necessary to access GSM services

• The ability to store user information such as phone numbers

• All information required by the network provider to provide access to the network

Identification

Each Motorola GSM phone is labeled with a variety of identifying numbers. The following
information describes the current identifying labels.

Mechanical Serial Number (MSN)

• The MSN is an individual unit identity number and remains with the unit throughout its
life.

• The MSN can be used to log and track a phone on Motorola's Service Center Database.

• The MSN is divided into 4 sections as shown in Figure 46.

MSN 10 Digits

3 Digits 1 Digit 2 Digits 4 Digits

APC

Account Product Code
i.e. StarTAC™ Phone130

Distribution Center
i.e. Easter Inch

DC DC SNR

Date Code: Year and
Month of Shipment

Unit's individual serial
number

Figure 46. MSN Divisions

International Mobile Station Equipment Identity (IMEI)

The International Mobile Station Equipment Identity (IMEI number is an individual number
unique to the Transceiver and is stored within the unit's memory. The IMEI uniquely identifies
an individual mobile station and thereby provides a means for controlling access to GSM
networks based on mobile station types or individual units. The full IMEI structure is listed in
the table below.

Aug.15, 2006 37

Subscriber Identity Module (SIM) and Identification Label W370\W375

Table 2: IMEI Number Breakdown

TAC Serial Number Check Digit

NNXXXXXX ZZZZZZ A

Where

TAC Type Allocation Code, formerly known as Type Approval Code

NN Reporting Body Identifier (BABT or CTIA)

XXXXXX Type Identifier (defined by BABT or CTIA)

ZZZZZZ Individual unit serial number

Phase 1 = 0.

A

Phase 2 & 2+= check digit and is defined as a function of
all other IMEI digits

Other label number configurations present are:

• TRANSCEIVER NUMBER: Identifies the product type. Normally the SWF number. (i.e.
V100).

• PACKAGE NUMBER: Identifies the equipment type, mode, and language in which the
product is shipped.

38 Aug.15, 2006

Level 1-2 Service Manual Troubleshooting

Troubleshooting

W370/W375 Troubleshooting Chart

Level 1 and 2 Troubleshooting Chart

Symptom Probable Cause Verification and Remedy

1. Phone will not turn on or stay on. a) Battery either discharged or
defective.

b) Battery terminals open or
misaligned.

c) Keypad defective. Replace the keypad. Temporarily connect a +3.6

2. Phone exhibits poor reception or

erratic operation such as calls
frequently dropping or weak or
distorted audio.

3. Display is erratic, or provides

partial or no display.

4. Incoming call alert transducer

audio distorted or volume is too low.

Connections to or from lower
PCB defective.

LCM defective. Replace the LCM. Verify that the fault has been

Speaker defective. Replace the speaker as described in the

Measure battery voltage across a 50 ohm (>1 Watt)
load. If the battery voltage is <3.25 Vdc, recharge
the battery using the appropriate battery charger. If
the battery will not recharge, replace the battery. If
battery is not at fault, proceed to b.

Visually inspect the battery terminals on both the
battery and the phone. Realign and, if necessary,
either replace battery or refer to a Level 3 Service
Center for the battery connector replacement. If
battery terminals are not at fault, proceed to c.

Vdc supply to the battery terminals. Press and hold
the PWR button. If phone turns on and stays on,
disconnect the dc power source and reassemble
with the new keypad.

Check connection between the antenna and the
lower PCB.

cleared and reassemble the phone with the new
LCM.

procedures. Verify that the fault has been cleared
and reassemble the phone with the new speaker.

5. Phone transmit audio is weak.

(usually indicated by called parties
complaining of difficulty in hearing
voice).

6. Receive audio from earpiece

speaker is weak or distorted.

Microphone defective. Replace the microphone as described in the

procedures. Verify that the fault has been cleared
and reassemble the phone with the new
microphone.

a) Connections to or from lower
PCB defective.

b) Earpiece Speaker defective. Temporarily replace the earpiece speaker with a

Check connection between the antenna and the
lower PCB. If the connection is OK, proceed to b.

known good earpiece speaker. Ensure good
connection. Place a call and verify improvement in
earpiece audio. If fault is cleared, reassemble the
phone with the good earpiece speaker.

Aug.15, 2006 39

Troubleshooting W370\W375

Level 1 and 2 Troubleshooting Chart (Continue)

Symptom Probable Cause Verification and Remedy

7. Phone will not recognize or accept SIM
card.

8. Keypad not functioning. Keypad defective. Use alcohol to wipe the keypad metal dome.

9. Vibrator feature not functioning. a) Vibrator faulty. Check general condition of vibrator. If it is

10. No or weak audio when using
headset.

SIM card defective. Check the SIM card contacts for dirt. Clean if

necessary, and check if fault has been
cleared. If the contacts are clean, insert a
known good SIM card into the phone. Power
up the phone and confirm that the card has
been accepted. If the fault no longer exists,
replace the defective SIM card.

Check if fault has been cleared. If the fault is
still present, either replace the keypad or refer
to a Level 3 Service Center for the keypad
metal dome replacement.

good, proceed to b.

b) Vibrator defective. Replace the defective vibrator.

a) Headset plug not fully pushed. Ensure the headset plug is fully seated in the

jack. If the seated is OK, proceed to b.

b) Headset defective. Temporarily replace the headset with a known

good headset. Ensure good seated. Place a
call and verify improvement in headset audio.
If fault is cleared, replace the defective
headset.

11. Camera module not functioning. (for
W375)

Camera module defective. Replace the camera module as described in

Programming: Software Upgrade and Flexing

Contact your local technical support engineer for information about equipment and procedures
for flashing and flexing.

the procedures. Verify that the fault has been
cleared and reassemble the phone with the
new camera module.

40 Aug.15, 2006

Level 1-2 Service Manual Part Number Charts

Part Number Charts

Figure 47. W375 Exploded View Diagram

Aug.15, 2006 41

Part Number Charts W370\W375

Figure 48. W370 Exploded View Diagram

42 Aug.15, 2006

Level 1-2 Service Manual Part Number Charts

Exploded View Parts List

Table 3: W375 Exploded View Parts List

Item

Number

001 2220601101W MIC
002 2240071102W RECEIVER SDRP0711KJ01-F1-G 32ohm 7*11mm
003 3930407501W G SPR-VIB
004 7630001895W LCM TD018THEJ8 128*160 TOPPOLY
005 2250160807W SPEAKER DMS1608F-05-PC-FB-G 8ohm AAC
006 7651H90001W CAMERA H90 CM-5628 VGA CHICONY
051 82E5803301W G LABEL E58 WATERPROOF LABEL 4mm
251 6910890001W G F/WMB 33 H80 GA-114
252 6320500001W G SMT LCM/B H80/H80A GS-063
253 21H80030C1W PCB-ASSY H80 GF-057 REV:0C FB
300 5501350001W G ME/PT 33 H80 SILVER
301 254JH80001W COVER H80-PC-SILVER
302 2526H80001W KB UPP-C H80-IXEF1622-BLACK
303 3023H80001W MIC-HOLD H80-RUBBER-BLACK
304 2551H80001W LANYARD H80-PC-BLACK
305 2538H80001W HINGE-KB H80-PC-BLACK
306 3106H80001W VOL-KEY H80-RUBBER-SILVER-1
307 3101H80001W DIAL-KEY H80-RUBBER-BLACK-23
308 3041H80001W SPRING H80-C1720-4.8*12.3*0.2-KB
309 23A1H80001W ANT-ASSY H80-EU TRI BAND
310 3109H80001W MET-DOME
311 3064H80001W MYLAR H80-12.8*13.5*0.15
312 3052H80001W SHIELD-C H80-SUS304-40.2*34.2*1.50 MCOV
313 302FH80001W SPK-GASKE H80-RUBBER-39*18.4*4.7
314 303LH80002W BTB-SPON H80-PORON-6.2*8.8*1-KB
315 302BH80002W RUBBERPAD H80-TPU-SILVER-AUDIO
316 302BH80001W RUBBERPAD H80-TPU-SILVER-USB
317 2527H80001W KB LOW-C H80-PC-SILVER
318 3028H80001W RF-COV H80-RUBBER-SILVER
319 254AH80001W LED-LENS H80-MR58-BLACK
320 2517H80001W DISLOWASY H80-SILVER
321 303LH80003W BTB-SPON H80-PORON-4*12*0.3-CAMERA
322 303LH80001W BTB-SPON H80-PORON-7.5*11*0.3-DIS
323 305AH80001W BRACKET H80-SUS304-39*62.9*0.3
324 302AH80001W RUBBER H80-8.6*9.4*4.3-VGA COVER
325 302AH80003W RUBBER H80-RUBBER-TRANSPARENT-LED
326 302AH80002W RUBBER H80-10.7*7.9*4.2-VGA BASE
327 2516H80001W DISUPPASY H80-BLACK
328 3407119001W HINGE H96-FE+AU-F7*11.95-5 PREXCO
329 2541H80001W LCD-LENS H80-MR58-TRANSPARENT
332 302BH80007W RUBBERPAD H80-SILICON-6*7-WHITE-HINGE
350 3501745101W SCREW TORX M1.7*4.5-BLACK-NI KL-IXEF
351 3501733103W SCREW TORX M1.7*3.3-BLACK-NI KL
352 254CH80001W SCREW-COV H80-RUBBER-BLACK

Part Number Description Specification

ACM6011-02P22-413 6*1.1 AAC

ψ

4*L7.55 1.3V LA4-458DB COPAL

ψ

H80- 4*170g-23

ψ

φ

Aug.15, 2006 43

Part Number Charts W370\W375

Table 4: W370 Exploded View Parts List

Item

Number

001 2220601101W MIC

002 2240071102W RECEIVER SDRP0711KJ01-F1-G 32ohm 7*11mm

003 3930407501W SPR-VIB

004 7630001895W LCM TD018THEJ8 128*160 TOPPOLY
005 2250160807W SPEAKER DMS1608F-05-PC-FB-G 8ohm AAC
051 82E5803301W LABEL E58 WATERPROOF LABEL 4mm
251 6910890011W F/WMB 33 H80A GA-114
252 6320500011W SMT LCM/B H82A GS-063
253 21H80030C1W PCB-ASSY H80 GF-057 REV:0C FB
300 5501430001W ME/PT 33 H82A SILVER
301 254JH80001W COVER H80-PC-SILVER
302 2526H80001W KB UPP-C H80-IXEF1622-BLACK
303 3023H80001W MIC-HOLD H80-RUBBER-BLACK
304 2551H80001W LANYARD H80-PC-BLACK
305 2538H80001W HINGE-KB H80-PC-BLACK
306 3106H80001W VOL-KEY H80-RUBBER-SILVER-1
307 3101H80001W DIAL-KEY H80-RUBBER-BLACK-23
308 3041H80001W SPRING H80-C1720-4.8*12.3*0.2-KB
309 23A1H80A01W ANT-ASSY H80A-US TRI BAND

310 3109H80001W MET-DOME

311 3064H80001W MYLAR H80-12.8*13.5*0.15
312 3052H80001W SHIELD-C H80-SUS304-40.2*34.2*1.50 MCOV
313 302FH80001W SPK-GASKE H80-RUBBER-39*18.4*4.7
314 303LH80002W BTB-SPON H80-PORON-6.2*8.8*1-KB
315 302BH80002W RUBBERPAD H80-TPU-SILVER-AUDIO
316 302BH80001W RUBBERPAD H80-TPU-SILVER-USB
317 2527H80001W KB LOW-C H80-PC-SILVER
318 3028H80001W RF-COV H80-RUBBER-SILVER
319 254AH82A01W LED-LENS H82A-MR58-BLACK
320 2517H80001W DISLOWASY H80-SILVER
322 303LH80001W BTB-SPON H80-PORON-7.5*11*0.3-DIS
323 305AH80001W BRACKET H80-SUS304-39*62.9*0.3
325 302AH80003W RUBBER H80-RUBBER-TRANSPARENT-LED
327 2516H80001W DISUPPASY H80-BLACK
328 3407119001W HINGE H96-FE+AU-F7*11.95-5 PREXCO
329 2541H80001W LCD-LENS H80-MR58-TRANSPARENT
332 302BH80007W RUBBERPAD H80-SILICON-6*7-WHITE-HINGE
350 3501745101W SCREW TORX M1.7*4.5-BLACK-NI KL-IXEF
351 3501733103W SCREW TORX M1.7*3.3-BLACK-NI KL
352 254CH80001W SCREW-COV H80-RUBBER-BLACK

Part Number Description Specification

ACM6011-02P22-413 6*1.1 AAC

ψ

4*L7.55 1.3V LA4-458DB COPAL

ψ

H80- 4*170g-23

ψ

φ

44 Aug.15, 2006

Level 1-2 Service Manual Part Number Charts

There is a danger of explosion if the Lithium ion battery pack is replaced incorrectly. Replace
only with the same type of battery or equivalent as recommended by the battery manufacturer.
Dispose of used batteries according to the manufacturer's instructions.

To order parts please use the following Link:

https://servicelink3.motorola.com

(Password is required)

For information on ordering parts please contact EMEA at [phone].

Accessories

Table 5: List of Accessories

Description Part Number

Power Solutions

BQ50 battery 850 mAh SNN5804A
BT50 battery 850 mAh SNN5771A
EMU Switch Mode Midrate (PRC) SPN5188B
EMU Switch Mode Midrate (US) SPN5185B
EMU Switch Mode Midrate (Taiwan) SPN5216C
EMU Switch Mode Midrate (Euro) SPN5189B
EMU Switch Mode Midrate (HK/UK) SPN5190B
EMU Switch Mode Midrate (Australia) SPN5193B
EMU Switch Mode Midrate (India) SPN5194B
EMU Switch Mode Midrate (Mexico) SPN5186B
EMU Switch Mode Midrate (Brazil) SPN5187B
EMU Switch Mode Midrate (Arg) SPN5192B
EMU Switch Mode Dual Rate (Brazil) SPN5196B
EMU Switch Mode Dual Rate (Arg) SPN5197B
EMU Switch Mode Dual Rate (PRC) SPN5198B
EMU Switch Mode Dual Rate (HK) SPN5199B
EMU Switch Mode Dual Rate (Mex) SPN5200B
EMU Switch Mode Dual Rate (US) SPN5202B
EMU Switch Mode Dual Rate (Twn) SPN5270B

In-Vehicle

VC700 EMU Power Adapter SYN0847A

Audio&Connectivity

Mini USB/USB/Serial Data Cable SKN6371B/C
Mono Earbud Headset (Black) SYN8390B
Mono Earbud Headset (Silver) AAYN4264B
One-Touch Headset SYN8419C
Stereo One-Touch Earbud Headset CHYN4516B
Stereo One-Touch Earbud Headset SYN1603B
Right-Angle Adapter SKN6182A
Audio Converter SKN6183A

Consumer&Personalization

Silver Lanyard (Asia except PRC) AAYN4402A
Silver Lanyard CHYN4546

Aug.15, 2006 45

Part Number Charts W370\W375

46 Aug.15, 2006

Level 1-2 Service Manual Index

Index

A

About

Audience
Conventions

Scope
Accessories and Aftermarket Division
Audience

B

Battery

Function

Operation
Battery Gauge

C

Caller Line Identification 10
Controls
Conventions
Customer Support

4

5

4

6

4

14

14

14

11

5

5

D

Disassembly 15

E

Electrostatic Discharge 15

G

General Functions 11

H

Headset Connector Port 11

I

Indicators 11
Input/Output (I/O) Connectors
International Mobile Station Equipment Identity (IMEI)

Number Breakdown

11

37

37

Aug.15, 2006 Index-1

Level 1-2 Service Manual Index

L

Left Soft Key 11
Liquid Crystal Display (LCD)
Low Battery

14

12

M

Mechanical Serial Number 37
Menu Key
Menu Navigation
Microphone

11

11

11

N

Navigation Key 11

O

Other Features 10
Out of Box Failure Policy

5

P

Part Number Charts 41
Parts Replacement

Accessories and Aftermarket Division
Power Connector Port
Power/End Key
Product Overview

Caller Line Identification

Features

Other Features

SIM Toolkit™ - Class 2

Simplified Text Entry
Product Support

6

6

11

11

9

10

9

10

10

10

5

R

Right Soft Key 11

S

Scope 4
Send/Answer Key
SIM Card

SIM Toolkit™ - Class 2
Simplified Text Entry
Specifications

37

Identification Label

International Mobile Station Equipment Identity (IMEI)

Mechanical Serial Number

11

37

37

10

10

7

37

Aug.15, 2006 Index-2

Level 1-2 Service Manual Index

T

Tools and Test Equipment 14
Troubleshooting

39

U

USB Connector Port 11
User Interface
User Interface Menu Structure

11

13

W

Warranty Service Policy 5

Customer Support

Out of Box Failure Policy

Product Support

5

5

5

Aug.15, 2006 Index-3

Level 1-2 Service Manual Index

Aug.15, 2006 Index-4

MOTOROLA, the Stylized M Logo, and all other trademarks indicated as such herein are trademarks of Motorola, Inc.

All other product or service names are the property of their respective owners.

® Reg. U.S. Pat. & Tm. Off.

© 2005 Motorola, Inc.

All rights reserved.

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