Motorola C330, C331, C332 Service Manual

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Consumer Solutions & Support

US Competency Center
600 North US Highway 45
Libertyville, Illinois 60048

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Website: gs.mot.com

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NOTE: This FSB will expire on Aug 18, 2004 or until replacement battery
connectors become available. A revised FSB will be issued at that time.

FSB Number: LVCCFSB2003-115 Rev C
Author: Max Dekirmandjian
Date: June 23, 2004
Total No. of Pages: 9
Subject: C33x Battery Metering Inaccurate
Model Affected: C330, C331, C332, & C333 GSM
Level of Repair: 3 & 4

Problem

Service has been made aware of an issue with the battery level indicator on
C33x GSM phones. When a call is placed, the battery level indicated on the
phone’s display will initially show three bars (with a fully charged battery), then
drops one bar within minutes. Therefore the end user perceives this as “Short
Battery Life”, or “Battery Not Holding Charge” This false indication is particularly
evident when a test call is made using a call simulator such as a CMU200 or
HP8922 when the TX Power Level is set at maximum power. Within 15 minutes,
the indicator can drop one bar.

Solution

Battery/Charging failures have been determined to be the result of one or any
combination of the following root causes:

1) Phone software-versions prior to TA02_06.04.2FR have a lower A to D
sampling rate;

2) MIWA sideband(C333 only)-a conductive coating on the front housing
sideband leads to degradation of the RF signal which results in the phone
transmitting at a higher power level, thus shortening battery life;

3) Faulty phone battery

4) Hirose Battery connector (assy P/N 0189727L01) and/or PCB connector
(P/N 2809180T01)-Oxidation/plating issues on contact pin(s) increasing
the pin’s resistance.

In addition, it has also been determined that changing the SEEM elements in the
unit’s flex results in a more accurate battery level reading.

Field Service Action

Customer Returns:

Perform the following procedure on all C33x returns:

1. Verify that the phone’s software version is TA02_06.04.2FR or later.
Reflash if necessary.

MOTOROLA INTERNAL USE ONLY Page 1

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Consumer Solutions & Support

US Competency Center
600 North US Highway 45
Libertyville, Illinois 60048

2. Replace Miwa sideband if necessary (C333 only). Refer to Field Service
Bulletin LVFSB2003-49 Rev A for details.

3. For US Band products-Re-flex with flex version 171.

4. For Euro Band products-Re-flex with flex version 173

Perform the following Battery Connector rework using the procedure below only
on units returned for battery or charging related complaints such as:

1) Battery Life Short

2) Battery Not Holding Charge

3) Battery Meter Inaccurate

4) Battery Charging Too Slow

5) Battery Does Not Charge

Website: gs.mot.com

Battery Connector Rework Procedure:

CAUTION: The rework process involves working with exposed
battery wires. Extreme care must be taken throughout the
rework process to avoid shorting of these wires to each other or
with PCB components. If a short does occur, then the wires will
quickly become extremely hot, possibly resulting in a burn. The
procedure MUST be followed step by step as described

1) Disassemble the unit to gain access to the battery.

2) Remove the battery from the PCB battery connector

3) Using a flatblade jeweler’s screwdriver, break off the of the PCB battery
connector negative (-) pin by moving the pin back and forth several times
until it breaks at the connector’s base. Refer to Photos 1 thru 4 below.

Photo #1-Original PCB Batt Connector

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MOTOROLA INTERNAL USE ONLY Page 2

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Consumer Solutions & Support

US Competency Center
600 North US Highway 45
Libertyville, Illinois 60048

Website: gs.mot.com

Photo #2-Bending PCB Batt Connector Negative Pin

Photo #3-PCB Batt Connector Negative Pin Broken Off

MOTOROLA INTERNAL USE ONLY Page 3