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CCS Technical Documentation
APE Reset
APE reset
trouble
shooting
Switch power on
by connecting
power to battery
terminals of the
phone
Low to
high transition
on PURX
(N4800, pin #3) &
Voh ~ 1.8V ?
(Fig. 5)
Yes
Low to
high transition
on MPU_nRes e t
(N4800, pin #1) &
Voh ~ 2.8V ? PURX to
MPU_nReset delay should
be 65-195ms !
(Fig. 5)
Yes
Check completed
52
Go to CMT
No
troubleshooting
Note!!!
Only probes having input impedance of
10Mohm or greater should be used when
measuring MPU_nReset.
R4802 ~100k
No
& solder joints
OK ?
No
Fix solder joints or
change R4802
COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.
Check the solder
joints of N4800
Yes
and change the
chip, if necessary.
RM-12
Issue 1 11/2004
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Table of Contents
Troubleshooting
