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RM-12
APE flash
All signals in this
troubleshooting are in
range 0 - V18
Busy# signal rises
at latest after
1055us after
RSTIN# rises.
However, the Busy#
can be high before
RSTIN# rises, but this
is not taken into account.
Check
resistors
No
R5000 and
R5001,
both ~10k
Yes
Measure
CS0# at J4805
and OE#
No
J4802,
toggling?
Yes
Memory
corrupted, reflash,
or replace MDOC
D5000
Issue 1 11/2004
Start
Measure
MDOC Busy#
at R4801 and
RSTIN# at
J4803
RSTIN# stays low
Measure
MPU_nReset at
Go to OMAP1510
Yes
R4802, low to
high transition?
Stays low
Go to APE reset
troubleshooting
Replace damaged
resistor(s)
Go to OMAP1510
troubleshooting
COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.
Backup user data before
MDOC troubleshooting, if
possible
Boot phone.
Use oscilloscope.
Check resistor
Busy#
stays low
Check MDOC
core voltage at
troubleshooting
C5000, V28
Check MDOC
I/O voltage at
R5000 and
MDOC damaged,
replace D5000
Nokia Customer Care
Replace resistor
R4801
No
R4801 and rerun
~10k
Yes
Correct
voltages
Voltage
Go to APE Power
level
C5001,
invalid
V18
Correct
voltages
Check
resistors
Replace damaged
No
R5001,
both ~10k
Yes
first test
Voltage levels
invalid
troubleshooting
resistor(s)
39
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Table of Contents
Troubleshooting
