Aib Rx Audio Troubleshooting Chart - Motorola ASTRO Spectra Instruction Manual

Active
Does Is jumper
Check/Replace Yes high
TP17 go from placed for active
jumper J15 0V to 5V when high or active
receiving? low?
Active
No
low
Does
Does TP16
No
Check/Replace No TP25 go from voltage go from
0V to 8V when
5V to 0V when
U107
receiving?
receiving?
Yes Yes
Check/Replace Check/Replace
Q101 and/or Q102 jumper J15

AIB RX Audio Troubleshooting Chart

60
START
AIB RX AUDIO
Set up standard
receive test
configuration
(see notes)
Is Consult
No
busy light appropriate radio
on?
service manual
Yes
Yes
1kHz
Radio cable
No
present at continuity
J1-17, 36, 49?
ok?
Yes
Determine
receiver audio
routine source
1
Yes
Continuity
Filtered Yes
between J1-11,
Audio?
36 and J3-32,
7 ok?
No
WARNING:
Yes
Speaker SPKR_LO must not be
audio?
grounded or damage
to the radio may result
No
Is
Jumper J15
Yes Yes
Speaker
placed
UnMute?
appropriately?
No No
Place the jumper for
Detect
either active high or
Audio
active low operation
9.6V ±5%
9.6V ±5%
Yes
present between
present at
R104 and C105?
U102-4?
No No
2 2
Verify accessory
No
Replace cabling continuity
1
and consult appropriate
cable
component manual
Repair or
2 replace board
as necessary
NOTES:
1. Standard receive receive signal is 1kHz
at 60% FSD on appropriate carrier.
2. Be sure all jumpers and switches are
appropriately set for application (see schematic).
No
2
2 2
No
Continuity Continuity
Digital
Yes
No
between J1-24, between J1-22,
deskset
49 and J4-1 47 and J4-2
present?
ok? ok?
Yes
Continuity Continuity
Ensure
Yes
between J1-24, between J1-22,
S101-SW7
49 and J3-2 47 and J3-4
is on
ok? ok?
No
2
2
2.2V 1kHz
Remove cables
Yes Yes
present at at J3-1 and
from accessory
U102-5, 10?
J3-6?
connectors
No
2
No
Yes
1
Yes
1
No
No
1kHz
Yes Yes
at J3-46
No
2
MAEPF-26318-A
6881086C22-B