Troubleshooting Chart 1-1, Overall Radio - Motorola MCS 2000 Service Instructions Manual

9-2

Troubleshooting Chart 1-1, Overall Radio

A+ = 13.4V, Accessory Connector
plugged in, Control Head plugged in,
Emergency Jumper in place
(Speaker Jumper in place Model 1 only)
Yes
GOTO
Errors
On/Off Button, errors
Failure Code
Chart 1-2
in CSQ test mode
Check TX power
No
tuning with RSS.
GOTO Power Control
Chart 1-13.
Connect signal generator
to antenna connector.
Set to channel frequency.
on control head. Audio
Horn and Lights
December 6, 2004
START
Radio Setup
No
Attach known good
Pressing
Display
control head using
control head
on display?
extender cable
No
Errors
Put the radio
Replace
Cable
(Note 1 and 2)
Repair or
TX power
Replace
OK?
J0405
Yes
GOTO
No
TX deviation
TX Audio
OK?
Chart 1-4
Yes
Check frequency
TX output
No tuning using RSS.
centered on
GOTO Band Specific
frequency?
Synthesizer Chart
Yes
Press
GOTO
monitor button
No
RX Audio
Chart 1-5
from speaker?
NOTE: Button press is to defeat squelch. Audio may come through
Yes
without button press depending on squelch level set.
GOTO
No
Sensitivity
Band Specific
OK?
RX Front End
Yes
GOTO
No
Audio distortion
Band Specific
<5%?
RX IF
Yes
GOTO
Radio
No
decoding Signalling
Chart 1-6
PL/DPL?
Yes
GOTO
Emergency
No
GPIO
Chart 1-12
OK?
Yes
END
Troubleshooting: Troubleshooting Chart 1-1, Overall Radio
No
Display
OK?
Yes
IF remote
cable, do all lines
No
have continuity and all
lines free of shorts
to other lines
Yes
No J0405
OK?
creates pulse on
Yes
GOTO
Control Head SB9600 Bus RX
Chart 1-8
Note 1. Power up the radio and press the
monitor button five times.
Note 2. See Band Specific TX Troubleshooting
Chart for proper setup.
MAEPF-25945-O
GOTO
13.4V on No
DC Distribution
J0405-18?
Chart 1-7
Yes
GOTO
13.4V on No
DC Distribution
J0405-17?
Chart 1-7
Yes
Pressing
GOTO
No
On/Off Button
On/Off
Chart 1-3
J0405-9?
Yes
GOTO
Chart 1-10
68P81083C20-D