User Guide

6255/6255i6256/6256i (RM-19)
Baseband Description and Troubleshooting Nokia Customer Care
Page 70 ©2005 Nokia Corporation Company Confidential Issue 2 05/2005
MMC
The hardware of the MMC interface from the UEME (D2200) to the MMC connector
(X3200) cannot be tested without an MMC card. Solder wires on respective points to be
able to measure the following.
MMC faults
Measure VBAT at
C3200 = 3.7-4.2V?
YES
NO
YES
Measure VMMC at
C2301=2.85V
Defective PWB
Replace N3200
The following points
can be measured at
phone power up
because the MMC is
initialized here.
NO
Measure VMMC at
X3200 pin 5 = 2.85V
Resolder X3200
NO
YES
Measure MMC_CMD
and MMC_CLK
activity on X3200,
pins 7 and 4
Replace R3202
NO
YES
Re-flash phone