5.14 Removable Memory Failure - Motorola APX 7000 Detailed Service Manual

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5.14 Removable Memory Failure

Ensure the SD card is seated in the
socket correctly. If not reseat SD card.
END
SD Card should
be replaced with
a new card
Replace
Expansion
Board
Replace
Controller
Board
SD CARD ERROR
Yes
Issue
Resolved?
No
Replace card with known
good SD card
Yes
Issue
Resolved?
No
Measure voltage on C2018 on
the expansion board.
Approximately 2.7 volts.
No
Voltage level
correct?
Yes
Swap Expansion
Board with know
good board.
Yes
Problem
solved?
Swap Controller
Board with a
known good
board.
No
Problem
solved?
Inspect and repair
Expansion Board
connectors
Troubleshooting Charts: Removable Memory Failure
Synopsis
This failure relates to a memory card
failure for radios equipped with a
removable SD memory card.
The removable memory signal lines
are considered un-traceable with the
VOCON and Expansion board
assembled within the radio. A special
test fixture may be required to access
the signals. The shield on the VOCON
and expansion board may need to be
removed for diagnosis.
Measure voltage on C2128 on
the expansion board.
Approximately 3 volts.
Voltage level
correct?
Yes
Measure voltage on C2111 on
the expansion board.
Approximately 3 volts.
Voltage level
correct?
Yes
Using an o-scope verify activity
on MMC2_USD_CMD line.
Activity?
Yes
Inspect and repair
Expansion Board
connectors
No
Replace
U2105
Check
MMC2_MPC
No
signal Path
and repair
necessary
connections
Inspect u2102
& associated
No
components
and replace if
necessary.