C115
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Consumer Solutions & Support
US Competency Center
600 North US Highway 45
Libertyville, Illinois 60048
Website: gs.mot.com
FIELD SERVICE BULLETIN
FSB Number: LVCCFSB2004-231 (Rev. A)
Author: Rajesh Verma
Date: November 15, 2004
Total No. of Pages: 3
Subject: GSM C115 – Display Missing Line or Pixels
Model Affected: GSM C115/116/117
Level of Repair: 2
Problem:
Service is aware of an issue identified during the 1st 200 NPI Analysis on C115.
Some units, returned with a customer complaint of “Corrupt Display”. Customer
may notice one or more lines of pixels missing horizontally across the LCD. This
is caused by failures of the Giantplus LCD display modules part number
763000C002W either due to scratches on the ITO lines or display IC’s solder ball
height. The ITO line scratches are caused by either defective raw material or
scratches caused by the line operator during electrical probing. The display IC’s
solder ball height non-uniformity is caused by solder flow process. The figures
below show an example of a display with a missing line or pixels.
Fig. 1.0 – Display Missing Line Fig. 2.0 – Display Missing Line
Solution:
Corrective actions were implemented by supplier Giantplus from Oct.1, 2004.
Giantplus have introduced the following improvements to their process:
1. Inspect incoming ITO Glass (raw material) under Microscope has been
started since week 40, 2004 (starting Oct.4).
2. Giantplus will measure the resistance of the panel’s to check for opens or
shorts on the ITO traces.
MOTOROLA INTERNAL USE ONLY Page 1
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