Motorola BC33 Service Manual
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Consumer Solutions & Support
US Competency Center
600 North US Highway 45
Libertyville, Illinois 60048
Website: gs.mot.com
FSB Number: LVCCFSB2003-115 Rev B
Author: Max Dekirmandjian
Date: January 15, 2004
Total No. of Pages: 4
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
Website: gs.mot.com
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
Replace the PCB Battery Connector-P800 (P/N 2809180T01) and phone battery
(P/N 0189727L01) 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
Connector Replacement Procedure:
1) Disassemble phone to gain battery access.
2) Remove the battery.
3) Remove the PCB Battery Connector by applying heat to the PCB
on the opposite side of the connector. See photo below:
MOTOROLA INTERNAL USE ONLY Page 2
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