5.17 Emmc Memory Failure - Motorola APX 5000 Service Manual

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5.17 eMMC Memory Failure

Install "FULL EXPANDER" board,
kit # HLN5978_
The "BASIC EXPANDER" board,
kit # HLN5977_
has no eMMC present.
Measure voltage
on R2312 on
Expansion board
and verify 2.775v
Voltage
Yes
level
correct?
No
Voltage
Yes
present at
R6562 at
VOCON?
Verify
connectors
No
J4001 to P2001
are seated
correctly and
not damaged
MAKO
defective.
Replace
VOCON
Use O-scope to verify
waveforms in Chapter 6
are present:
MMC_CLK,
MMC_CMD,
MMC_DAT0 thru
MMC_DAT3
Replace
VOCON
board
No
Remove Exp Brd
Measure voltage
on R2313 on
Expansion board
and verify 1.85v
Voltage
Yes
level
correct?
No
Voltage
present at
R6570 at
VOCON?
No
Yes
Verify U6508 is
operating
No
correctly on
VOCON
Yes
No
Troubleshooting Charts: eMMC Memory Failure
eMMC ERROR
Correct
Yes
version of
Expansion
board?
Yes
shield(s)
Measure voltage on
R2465 on Expansion
board and verify
AVR_STATUS_3.3v
Voltage
No
level
correct?
Yes
Voltage
present on
output of U2410
on Expansion
board?
No
This failure relates to a non-critical memory failure for
radios equipped with an expansion board containing a
soldered eMMC part.
All necessary testpoints are located under the
Expansion board shields and VOCON board shields.
The memory signal lines are only traceable at series
zero-ohm jumpers, and is not accessible when the radio
is functionally assembled.
A special test fixture is required to access the signals,
along with short wires soldered at the desired testing
points. Signal integrity is affected by passive probes
and long test wires. Testing scripts for eMMC functional
operation are only possible with a special software build
which enables these test script commands.
Remove VOCON
shield(s)
Measure clock at TP6301
on VOCON and verify
F2_TIMER_OUT. See
Chapter 6 for waveform
No
Replace
VOCON
board
Yes
Replace
Yes
Expansion
board
Synopsis
Yes
Verify
connectors
J4001 to P2001
are seated
correctly and
not damaged