TROUBLESHOOTING: SLEDGEHAMMER TX Test
SLEDGEHAMMER Tx Test (Continued)
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Is
DMCS high
during the
TX slot?
Verify INDY
operation
and replace as
necessary.
Verify the
TX_SSI lines for activity.
Replace
ROADRUNNER.
Is
ASW low
during the
TX slot?
No
With the oscilloscope measure
REFCLK_IN to SLEDGEHAMMER at
TP_REFCLK_IN_SL test point on the
keypad side of the board (33.6 MHz clock
to SLEDGEHAMMER).
Perform the
SLEDGEHAMMER
test again.
With the oscilloscope
measure
test point TP_ASW
Check all associated circuits
and SLEDGEHAMMER and
repair and replace as necessary.
Is
there any
activity?
Replace
SLEDGEHAMMER.
Perform the 33.6 MHz
TCXO Test.
Is the
signal at 33.6 MHz
> 200 mVp-p
during the
TX slot?
Yes
No
Yes
No
Yes
No
C
D
Using the oscilloscope,
verify DMCS (TP_DMCS) Is high
during the TX slot.
Yes
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