Consumer Solutions & Support US Competency Center
600 North US Highway 45 Libertyville, Illinois 60048
Website: gs.mot.com
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FIELD SERVICE BULLETIN |
FSB Number: |
LVCCFSB2004-121 |
Author: |
Tony Bryan |
Date: |
July 01, 2004 |
Total No. of Pages: 2 |
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Subject: |
PCAP IC - Mid-Rate Charger Issue |
Model Affected: |
GSM Triplets, V80, E398, A760, A768, T725 Edge |
Level of Repair: |
2 |
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Problem
Service is aware of an issue, recently duplicated by the product development team, which affects all Motorola handsets that are using the PCAP Power Management IC. The issue affects the phone’s ability to charge the battery with a mid-rate charger under the specific conditions described below.
Initiate a call with the handset with some level of battery. During the call, wait until low battery state and low battery alert is heard. Then connect a mid-rate charger in attempt to charge the battery. Charging will not start, charging icon will not flash on display and no charging indication tone will be heard. If phone remains in a call, low battery alert is still heard and battery will eventually drain completely. Charging function will return to normal, when call is ended or after power down when you unplug and re-plug the cable.
The root cause of this issue is when battery voltage is below certain threshold (around 3.1v - 3.2v) and phone is in a call, if a mid-rate charger is attached, PCAP keeps sending interrupts to the processor, so that software keeps executing the interrupt service routine and never sends the battery/charger message.
Solution
A software solution has been identified and is scheduled to be integrated in the next released version of software for each product affected. A revision to this FSB will be released when the SW Release information is available.
Prior to the SW Release, the short-term solution is the use of a full-rate charger, which will not cause this issue.
MOTOROLA INTERNAL USE ONLY |
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