Motorola V525 Service Manual

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Con
sumer Solutions & Support
Website: gs.mot.com
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FSB Number: LVCCFSB2003-100 Author: Tony Bryan Date: October 17, 2003 Total No. of Pages: 3 Subject: Triplets Desense Improvement Model Affected: V300, V303, V400, V500, V525 Level of Repair: 2
Problem
Service is aware of an issue with Desense on GSM Triplets Products. Factory and ALT Testing has seen some fallout for poor RF Performance related to Desense.
Solution
SHORT-TERM:
Manufacturing has implemented the placement of a conductive 2mm Moon Pad
(3289229N02)
makes contact with the PCB Shielding and grounds the SIM Chassis to improve Desense performance. Please see Diagram 1.0 below for proper placement of the Moon Pad
LONG-TERM:
A re-design of the original metal SIM Chassis by Hardware Development and will be implemented in manufacturing as soon as material with the new design is available. The new design will include three metal fingers that extend into the housing and make contact with the PCB Shielding adequately grounding the SIM Chassis. Diagram 2.0 below shows a sample of the SIM Chassis with the improved design.
centered on the SIM Chassis. The added conductive Moon Pad
(3289229N02)
.
(0188940N01)
has been requested
MOTOROLA INTERNAL USE ONLY Page 1
`
Con
sumer Solutions & Support
Website: gs.mot.com
Special Note:
Place grounding pad as shown
on Base Chassis, approx. 2
mm from the lower part of the
battery contact opening;
approx.centered between the
sides.
Diagram 1.0 Moon Pad Placement
Diagram 2.0 New SIM Chassis Design
NOTE: Image shown is a V600 SIM Chassis and the Part Number is not valid!!
Special Note:
New Design with Three Metal
Fingers to GND Chassis
MOTOROLA INTERNAL USE ONLY Page 2
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