Table of Contents
Advertisement
RM-12
MMC Troubleshooting (1)
Start
Check that battery
lid magnet in the
mechanics are OK
Save picture to
known good MMC
card
Save and read
succeed?
No
Go to/Visit HALL
sensor
troubleshooting
Incorrect
voltage
Measure
voltage VMMC
at C5200 ~3V?
Correct voltage
No
Measure during
initialization, without card
Measure
MMC_CLK(pin #5)
and MMC_CMD(pin
#2) from connector
X5200
Signal approximately
as in Figures
MMC_CLK&MMC_CMD
Page 99
All measurements provide
that the MMC is initia lizing or
some operation is being tried
to perform. MMC power is
cut after ~5 seconds idle
time.
No
OK?
Yes
No MMC IF failure.
MMC card
Yes
corrupted or
damaged
Open the phone mechanics
at this point
Initialize MMC,
check GPIO15
voltage from
R5202, ~2.8V?
Yes
Change MMC
regulator N5200
and capacitors
C5201-C5203
MMC working?
Check
MMC_CMD
Incorrect
R5201 and
signals
MMC_CLK
R4807
Replace damaged resistors
Go to MMC
troubleshooting
page 2
Copyright ©Nokia. All rights reserved
Nokia Customer Care
Format or replace
MMC card
MMC initialization is done at
first access, after ~10sec
of idle time voltage drops to
zero. Use oscilloscope
Goto OMAP1510
No
troubleshooting
Yes
End
8
Frequency ~16MHz during
data transmission, ~400kHz
during initialization
Resistors
Go to OMAP1510
not damaged
troubleshooting
Issue 1 11/2004
Advertisement
Table of Contents
Troubleshooting
