User Guide

RAE-6/RA-4
Nokia Customer Care 6 - Baseband Description and Troubleshooting
52 COMPANY CONFIDENTIAL Issue 1 12/04
Copyright © 2004 Nokia. All Rights Reserved.
■ MMC troubleshooting
Save and read
succeed?
Save picture to
known good MMC
card
No MMC IF failure.
MMC card
corrupted or
damaged
Yes
Measure
MMC_CLK and
MMC_CMD
from connector
Signals
present
No
signals
Measure voltage
VMMC at C5200
or C5202.
3V±5%
Something
else
No
Initialize MMC,
check voltage from
R5202.
If reflash does not help, fault is in
non-reworkable component
(OMAP D4800). Refer to current
BER handling guidance.
2,8V
Not 2,8V
Change MMC
regulator N5200
All measurements provide
that the MMC is initializing
or some operation is being
tried to perform, since
MMC power is cut after 5
seconds idle time.
MMC initialization is done at
boot, after ~5sec voltage
drops to zero, use
oscilloscope
Start
replace
R5200
Still no signals
at connector
Connector, R5201,
R5200, C5200,
C5201, N5200,
R5202, C5203, and
C5202 seem to be in
order
Yes
Push the switch
S4400. Does
voltage on
R4421 change?
No
Replace S4400 and
retest
Yes
Is the rib in
the battery
cover in
place?
Yes
No
Replace battery
cover and retest