Motorola V303, V400, V500, V525 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: LVCCFSB2004-7
Author: Tony Bryan
Date: February 1st, 2004
Total No. of Pages: 3
Subject: GSM Triplets - SEC TMR Display Module
Model Affected: V303, V400, V500, V525
Level of Repair: 3
Problem
Service is aware of an issue identified during the 1st 200 NPI Analysis on V400
and V500/525. Some units, returned with a customer complaint of “Corrupt Main
Display”, were found to power up with a lower portion of the main display corrupt
and the upper portion of the main display functional. Analysis revealed “GateBlock” failure, a short between the ITO Layer and Data Metal Layer of the display
glass, to be the cause. The short can occur as a result of a foreign material,
corrosion, or ESD Burn internal to the display glass occurring at the display
manufacture. Figure 1.0 below shows examples of displays with the “Gate-Block”
failure.
Figure 1.0 – SEC TMR Display with Gate-Block Failure
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
Solution
The original design of the Samsung TMR Display Module
(7289238N02)
had a high
susceptibility to Gate Block failure due the overlapping of the ITO and Data Metal
layers. Samsung Changed the design of the TMR Display module, as of
November 1st, 2003, to a new mask to separate the ITO and Data Metal layers of
the display and strengthen the over-all tolerance against “Gate Block” failure.
Samsung TMR Display Modules
(7289238N02)
, built on Line 1 prior to November
1st, 2003, are highly susceptible to this defect. See Figure 2.0 below.
Samsung has managed 2 FAB lines and 2 types of 1.88 inch product have been
manufactured. In order to identify the FAB code of each product, you have to
inspect the red square below picture shown with a micro-scope after detaching
the black tape on the driver IC.
Sample picture of panel.
Figure 2.0 – Date/Lot Code Identification
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…
*Affected Date Code Range: CMH thru CMJ
Approximate Exposure:
1.13 million Samsung TMR Display Modules
(7289238N02)
are affected
Maximum Field Failure Rate of 4800 PPM (5.4K Units)
Predicted Field Failure Rate of 1500 PPM (1.7K Units)
MOTOROLA INTERNAL USE ONLY Page 2
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