Motorola E550, V535, V545, V550, V303 Service Manual

Consumer Solutions & Support
US Competency Center
600 North US Highway 45
Libertyville, Illinois	60048

Website: gs.mot.com

	FIELD SERVICE BULLETIN
FSB Number:	LVCCFSB2005-42
Author:	Tony Bryan
Date:	March 04, 2005
Total No. of Pages: 2
Subject:	GSM Triplets – Keypad Backlight (SEND/END Keys)
Phone Models:	GSM Triplets Refresh: E550, V535, V545, V550
	GSM Triplets: V303, V400, V500, V505, V525
Level of Repair:	1

Problem

Service is aware of a customer perception issue, identified in the NPI Analysis of the GSM Triplets Refresh product. This issue affects all GSM Triplet Refresh and GSM Triplet products, built after September 2004, that use the 3888844Nxx Keypad. Some units, returned with customer complaints of “Main Keypad – No/Dim Backlight”, were analyzed to have no failure. However, it was noted that the backlighting on the END key is almost completely dim and if compared to a Triplet unit built prior September 2004 there is a difference in the End-Key brightness.

When the factory cut-over from white to blue LED’s, for cost-reduction, there was a slight degradation in keypad backlight performance. Due to the keypad construction, this reduction in backlight intensity is most noticeable on the SEND and END keys.

Original – White LED’s

New – Blue LED’s

Solution

Factory Quality highlighted this concern during the initial test builds with the blue LED’s. The concern was reviewed and a business decision was made to accept the slight reduction in backlight intensity on these two keys.

To help minimize the variation between keypads, CTE has instructed the keypad suppliers to check for variations in opacity of the SEND and END keys using a light table. If these keys start to become too light or too dark, the laser process is adjusted accordingly. This was implemented at the keypad suppliers in October,

2004.

MOTOROLA INTERNAL USE ONLY

Page 1