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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: LVCCFSB2005-44
Author: Tony Bryan
Date: February 23, 2005
Total No. of Pages: 3
Subject: GSM V220 – 40-Pin Board to Board Connector
Phone Models: GSM V220
Level of Repair: 2
Problem
Service is aware of an issue, identified in factory testing and highlighted by the
field, on the GSM V220. Some units, returned with various customer complaints
including “Turn On/Off – No Turn On” and “Display Main – No Display”, were
found to be caused by poor connection between the flex cable and the PCBA at
the J932 40-pin connector. In some instances it was found that the flex cable is
making contact with the edge of the base front housing. See Fig. 1.0 below. This
prevents the connector from being fully seated and will result in intermittent
failure after drop.
Fig. 1.0 – Flex Cable is touching edge of F-Hsg
The root cause of the issue has been determined to be a connector shift, due to
surface pulling tension, during pick & place – SMT process. If connector is shifted
in the wrong direction edge of flex can contact housing. See Fig. 2.0 below.
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m
r
Consumer Solutions & Support
US Competency Center
600 North US Highway 45
Libertyville, Illinois 60048
Website: gs.mot.com
V220 Housing
0.2m
Connecto
Flex with FR4
Fig. 2.0 – Flex to Housing Positioning
Solution
AMK Factory worked with flex suppliers to shift the connector down by 0.20mm
from 0.45 center to 0.25mm from the pad. – 10/1/2004
Flex suppliers to place a black dot beside the 40-pin connector to identify flexes
made after the change. See Fig. 3.0 below.
Placing a dot beside
connector
Fig. 3.0 – Supplier Markings Added
40-pin
Factory implemented a 100% drop test, 5 x Drop, in production to screen out
potential failures – 2/16/2005
SDC is currently investigating additional long-term solutions to eliminate this
intermittent failure mode associated with the single-latch connector design used
on V220.
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Consumer Solutions & Support
US Competency Center
600 North US Highway 45
Libertyville, Illinois 60048
Website: gs.mot.com
Field Service Action
Customer Returns:
When servicing GSM V220 customer returns, with various customer complaints
including “Turn On/Off – No Turn On” and “Display Main – No Display”, where
the failure is suspected to be caused by poor connection between the flex cable
and the PCBA at the J932 40-pin connector, then:
1. Disassemble the housing and re-seat the flex cable into the J932 board
connector to determine if the failure is related to this issue.
a. If the failure is not related to this issue, then follow normal
troubleshooting and repair techniques to repair the defect per the
customer complaint.
2. Inspect the positioning of the flex cable, under magnification, to ensure
that is not contacting the edge of the base front housing. See Fig. 1.0
above.
3. If the flex cable is contacting the edge of base front housing, then replace
the flex cable to resolve this issue.
Call Center Action:
When responding to customer inquires on the GSM V220 product, with various
customer complaints including “Turn On/Off – No Turn On” and “Display Main –
No Display”, please direct the customer to have their phone serviced per this
FSB.
Service Entry Code
Please ensure that repairs of this type are logged on the Service Link database
as follows:
Global M-Claims Codes:
Customer Complaint Code:
DIM01 (Display Main – No Display)
TON01 (Turn On/Off – Can’t switch phone on)
Problem Found Code:
DIM01 (Display Main – No Display)
TON01 (Turn On/Off – Can’t switch phone on)
Reference Designator Code: J (Connector)
Repair Code:
RAS04 (Reassemble - CSB/FSB)
RMP10 (Replace Mechanical Part - CSB/FSB)
PRC E-Service Codes:
Problem Found Code:
3001 (Display Main – No Display)
2001 (Turn On/Off – Can’t switch phone on)
Repair Code:
1604 (Reassemble - CSB/FSB)
1310 (Replace Mechanical Part - CSB/FSB)
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