Motorola C116 Service Manual
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Beijing
Competency Centre
Beijing MCIC
No. 39A Zi Zhu Yuan Road,
Beijing
P.R.China
Website: gs.mot.com/cc
FIELD SERVICE BULLETIN – (Information Bulletin)
FSB Number: BJCCFSB2005-100
Author: Zhang Zhen
Date: 29th Mar 2005
Total No. Of Pages:
Subject: C115 Real Time Clock is not accurate
Model Affected: C115/C116/C155/C156/C157 GSM/DCS
Level of Repair: 1 &2
Problem
An issue was found in the C115/C116/C155/C156/C157 product, the customer complained: the
real time clock isn’t accurate or the real time clock slow, it was the U6 (32khz crystal) damaged,
the chip ’s internal was cracked.
Solution
This issue was U6 material issue, the chip’s internal cracked, the vendor is Epson, HZ factory
change the U6 chip’s vendor, the new vendor was Seiko, this action implement on Mar 2005.
Field Service Action
Customer Returns:
All C115/C116/
C155/C156/C1 57
of “Real time clock isn’t accurate” or “Real time clock is slow”, the service engineer need judge
as this rule: use main batteryà reset the accurate clock à after 5~10min, check the time àthe
time is slow, use oscilloscope test TP46 (this test point can get 32Khz), the frequency is not
32Khz, need replaced U6 chip.
U6 chip parts No.: 16 23276335W (Vendor: Seiko)
phones returned to Service Center with the Customer Complaint
MOTOROLA INTERNAL USE ONLY Page 1
`
Beijing
Competency Centre
Beijing MCIC
No. 39A Zi Zhu Yuan Road,
Beijing
P.R.China
Website: gs.mot.com/cc
TP46 test point, use
oscilloscope get
frequency 32Khz.
U6 (Crystal 32Khz) chip
Call Centre Action :
When a customer contacts the Motorola Call Center with Customer Complaint of “Real time
clock is not accurate” or “Real time clock is slow” with C115/C116/C155/C156/C157 handset,
then should be communicated to the customer carry the handset in Motorola certified service
center for the identified and repaired.
Service Entry Code
Global Code:
Complaint Code: FTR10- Feature-Real time clock problem
Root Cause Code: REP06- Replace Electrical Part – CSB/FSB
MOTOROLA INTERNAL USE ONLY Page 2
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