Motorola MSF 5000 Instruction Manual page 236

Appendix
B
Error Codes
MSF
5000
Instruction Manual
Audio Error Codes
Table B-2
Audio Error Codes (Continued)
Error
Description
Probable Cause Corrective Action
A30
non-ALC
audio-to-transmit audio
The following circuits
on the
TTRC
Replace
TTRC
board.
path failure
may
be
faulty:
TTRC
hardware
/
firmware
slightly
¢
EEPOT
7
(transmit audio level)
incompatible.
adjusted incorrectly.
¢
ALC
audio to
transmit audio line
2
path.
*
non-ALC
audio to
transmit path.
A40
processor
A/D
converter failure on The
A/D
converter system on
the
Replace processor on the Secure
Secure board
Secure processor is defective. board. If failure still occurs, replace
Secure board.
A4l
Secure alert tone encoder filter error
The following circuits on
the
Secure Replace Secure board.
board
may
be
faulty:
¢
secure alert tone low pass filter
circuit.
¢
alert tone sample circuit.
¢
Secure processor
A/D
converter.
A42 Coded Mod Splatter Filter
error
The following circuits
on the Secure Replace Secure board
board may be
faulty:
the secure
modulation
filter.
¢
modulation audio gate is
defective.
¢
SCF_CLK
signal inoperable.
A43 Coded Mod Gate failure The coded modulation audio gate on Replace Secure board
the
Secure board is not
muting
the
1
kHz
test tone.
A44 Coded
RX
Audio Line Filter
error
¢
Secure
ASIC
Coded
RX
output
Replace Secure
board.
driver.
*
Line filter
/
gate inoperable.
¢
RX
audio sampling circuit.
A45
RX
Coded Gate failure Line
coded gate
/
driver
is defective. Replace Secure board.
B-14
68P81092E09
3/14/94
Appendix
B
Error Codes
MSF
5000
Instruction Manual
Audio Error Codes
Table B-2
Audio Error Codes (Continued)
Error
Description
Probable Cause Corrective Action
A30
non-ALC
audio-to-transmit audio
The following circuits
on the
TTRC
Replace
TTRC
board.
path failure
may
be
faulty:
TTRC
hardware
/
firmware
slightly
¢
EEPOT
7
(transmit audio level)
incompatible.
adjusted incorrectly.
¢
ALC
audio to
transmit audio line
2
path.
*
non-ALC
audio to
transmit path.
A40
processor
A/D
converter failure on The
A/D
converter system on
the
Replace processor on the Secure
Secure board
Secure processor is defective. board. If failure still occurs, replace
Secure board.
A4l
Secure alert tone encoder filter error
The following circuits on
the
Secure Replace Secure board.
board
may
be
faulty:
¢
secure alert tone low pass filter
circuit.
¢
alert tone sample circuit.
¢
Secure processor
A/D
converter.
A42 Coded Mod Splatter Filter
error
The following circuits
on the Secure Replace Secure board
board may be
faulty:
the secure
modulation
filter.
¢
modulation audio gate is
defective.
¢
SCF_CLK
signal inoperable.
A43 Coded Mod Gate failure The coded modulation audio gate on Replace Secure board
the
Secure board is not
muting
the
1
kHz
test tone.
A44 Coded
RX
Audio Line Filter
error
¢
Secure
ASIC
Coded
RX
output
Replace Secure
board.
driver.
*
Line filter
/
gate inoperable.
¢
RX
audio sampling circuit.
A45
RX
Coded Gate failure Line
coded gate
/
driver
is defective. Replace Secure board.
B-14
68P81092E09
3/14/94