Motorola MSF 5000 Instruction Manual page 234

Appendix
B
Error Codes MSF
5000
Instruction Manual
Audio Error Codes
Table B-2
Audio Error Codes (Continued)
Error
Description
Probable
Cause
Corrective Action
A06
Alert
tone encoder-to-repeater
The receiver was not
fully
quieted
Perform
the
alignment procedure,
squelch detector failure
during power-up diagnostics,
refer to
Chapter
4
-
Alignment. If
indicating
the
following circuits
of
failure still occurs, replace SSCB.
the
SSCB may
be
faulty:
e
EEPOT
2
(repeater squelch
level)
adjusted incorrectly.
¢
defective squelch noise amp.
¢
defective repeater squelch
detector.
A07
Alert tone encoder-to-TP1 failure The following circuits on
the
SSCB Replace SSCB.
may
be
faulty:
¢
select
audio summer defective.
*
system audio sample
circuitry
defective.
A08 Alert
tone encoder-to-line audio
The following circuits on
the
SSCB Replace SSCB.
failure
may
be
faulty:
¢
defective line audio summer.
*
line audio alert tone gate.
*
line audio sample circuitry.
Ago
RX
audio gate-thru-repeater audio The following circuits on the SSCB Replace SSCB.
gate-to-transmit limiter
may
be
faulty:
e
defective repeat audio
gate.
¢
transmit summer.
*
compandor gate.
AOA
A/D
converter failure on
SSCB The
A/D
converter system on the Replace processor on the
SSCB.
If
processor
SSCB
processor is defective. failure still occurs, replace SSCB.
AOb Bad alert tone
TX
gate (no mute)
Alert
tone transmit
gate/ driver Replace SSCB.
circuitry.
AOC RX1
Audio
Gate failure Receiver audio
gate
/
driver circuitry. Replace SSCB.
A0d
Faulty
PL
filter/limiter circuitry
The following circuits on the
SSCB
Replace processor on the
SSCB. If
may
be
faulty:
failure still occurs, replace SSCB.
e
PL/DPL
filter
/
limiter circuits.
¢
input
capture system on
SSCB
microprocessor.
A20
A/D
converter failure
on
TTRC
The
A/D
converter system on
the
Replace processor
on the
TTRC.
If
processor
T'RC
processor is defective. failure still occurs, replace
TTRC.
A21
TRC
encoder failure
TRC
encoder.
Replace
TTRC.
A22
TRC
encoder-to-line
2
path failure or The following circuits on the
TTRC
Perform
the
alignment procedure,
Line
2
EEPOT
failure
refer to
Chapter
4
-
Alignment. If
may
be
faulty:
©
EEPOT C
(line 2 output level)
failure still occurs, replace
TTRC.
adjusted incorrectly.
©
Bad
TRC
encoder to line
2
path.
B-12
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
A06
Alert
tone encoder-to-repeater
The receiver was not
fully
quieted
Perform
the
alignment procedure,
squelch detector failure
during power-up diagnostics,
refer to
Chapter
4
-
Alignment. If
indicating
the
following circuits
of
failure still occurs, replace SSCB.
the
SSCB may
be
faulty:
e
EEPOT
2
(repeater squelch
level)
adjusted incorrectly.
¢
defective squelch noise amp.
¢
defective repeater squelch
detector.
A07
Alert tone encoder-to-TP1 failure The following circuits on
the
SSCB Replace SSCB.
may
be
faulty:
¢
select
audio summer defective.
*
system audio sample
circuitry
defective.
A08 Alert
tone encoder-to-line audio
The following circuits on
the
SSCB Replace SSCB.
failure
may
be
faulty:
¢
defective line audio summer.
*
line audio alert tone gate.
*
line audio sample circuitry.
Ago
RX
audio gate-thru-repeater audio The following circuits on the SSCB Replace SSCB.
gate-to-transmit limiter
may
be
faulty:
e
defective repeat audio
gate.
¢
transmit summer.
*
compandor gate.
AOA
A/D
converter failure on
SSCB The
A/D
converter system on the Replace processor on the
SSCB.
If
processor
SSCB
processor is defective. failure still occurs, replace SSCB.
AOb Bad alert tone
TX
gate (no mute)
Alert
tone transmit
gate/ driver Replace SSCB.
circuitry.
AOC RX1
Audio
Gate failure Receiver audio
gate
/
driver circuitry. Replace SSCB.
A0d
Faulty
PL
filter/limiter circuitry
The following circuits on the
SSCB
Replace processor on the
SSCB. If
may
be
faulty:
failure still occurs, replace SSCB.
e
PL/DPL
filter
/
limiter circuits.
¢
input
capture system on
SSCB
microprocessor.
A20
A/D
converter failure
on
TTRC
The
A/D
converter system on
the
Replace processor
on the
TTRC.
If
processor
T'RC
processor is defective. failure still occurs, replace
TTRC.
A21
TRC
encoder failure
TRC
encoder.
Replace
TTRC.
A22
TRC
encoder-to-line
2
path failure or The following circuits on the
TTRC
Perform
the
alignment procedure,
Line
2
EEPOT
failure
refer to
Chapter
4
-
Alignment. If
may
be
faulty:
©
EEPOT C
(line 2 output level)
failure still occurs, replace
TTRC.
adjusted incorrectly.
©
Bad
TRC
encoder to line
2
path.
B-12
68P81092E09
3/14/94