Motorola Astro Xts5000 Detailed 6881094c31 E Manual

November 16, 20066881094C31-E
5-20Troubleshooting Charts: Channel/Zone Select Error
5.8 Channel/Zone Select Error
MAEPF-27402-O
Replace Front
Cover Housing
Assembly
Repair flex or
connections as 
neededU1
checks
good? Verify operation
of zone knob
using Button Test
flowchart
Signals
check good at U1
on the controls
flex assy.?Verify codeplug
programming with
RSS. If codeplug
checks OK, then
replace U1. By studying the
adjacent table against
the channel numbers
that have errors, one
signal may be...

6881094C31-ENovember 16, 2006
Troubleshooting Charts: Button Test5-21
5.9 Button Test
EndKeys
correct?
Check signal
path integrity of
button in questionButton Test
Place radio in Test Mode.
Press Top Side Button
(Monitor) so display reads
CH TEST. This places the
radio in button test mode.
Then, press the orange
(Emergency) Top  Button
to verify codes displayed
as shown in the Button
Table at right
No Ye sThis chart relates to a failure in the button functions
Basic Failure modes are as follows:
1)...

November 16, 20066881094C31-E
5-22Troubleshooting Charts: Top/Side Button Test
5.10 Top/Side Button Test
Verify operation of
channel knob
using Button Test
flowchart
Top/Side Button
Test
Yes
Using RSS, verify
button is enabled
for function
NoButton check
OK?
Buttons
enabled?
Using a voltmeter measure the
voltages at
the appropriate resistor as indicated
in the synopsis. When the button of
interest is in the depressed state a
near zero voltage should be seen at
the resistor. Otherwise the voltage
should...

6881094C31-ENovember 16, 2006
Troubleshooting Charts: VCO TX/RX Unlock 5-23
5.11 VCO TX/RX Unlock
MAEPF-27398-B
VCO TX/RX
unlock
11.0Vdc or
drifting?3V at TP5? Yes
Yes
Yes
Yes
Yes YesNo
No
No No No
Yes
YesYes Frequency
detected?
VCO locked? No
YesNo
5V at TP3?
Check
VOCON board
Check parts 
around BJT. If
OK, replace BJT Check control
voltage at
TP243Check parts
around U1. If
OK, replace U2
Aux.
line 1 (2, 3, 4)
is high?Aux. line
3 high for TX
or low for RX
(VHF)? Is  unit
VHF?
NoNo FET
drain voltage...

November 16, 20066881094C31-E
5-24Troubleshooting Charts: VCO TX/RX Unlock
VOCON TX Audio—Page 1
MAEPF-27396-O
Inject a 200 mV
rms 1.0 kHz tone
to the test box
Audio In portRepair connections
and/or replace flex
and microphone Connections
OK?
Problem
with Mic path
components? No Problem
found.
End
Replace
appropriate
component
Is FM
deviation approx.
3.0 kHz?
Connect an
RLN4460A audio
test box (or equivalent)
to the radio side
connector Radio has no
Transmitter Deviation
(VOCON Evaluation)
Inspect...

6881094C31-ENovember 16, 2006
Troubleshooting Charts: VCO TX/RX Unlock 5-25
VOCON TX Audio—Page 2
MAEPF-27397-A
Replace U501
(GCAP II)
Replace
U509
(EEPOT) Go to
TX RF
flowchartReplace U301*
     
(Flipper ASIC) Clock
and Frame Sync
present?
Data
present at TX
test point? Use an oscilloscope to check the
SSI audio signals from the GCAP
(U703). The following test points
are used for data collection:
DCLK: 520 kHz Square Wave Clock*
           
TX: Audio Data Words
SYNC: 8 kHz Frame Sync Pulse
No
Ye s
Ye...

November 16, 20066881094C31-E
5-26Troubleshooting Charts: VCO TX/RX Unlock
VOCON TX Audio (for kit NNTN5567)—Page 1
Inspect internal
and external
microphone
contacts
Radio has no
Transmitter
Deviation
(VOCON
Evaluation)
No
Connection
OK?
Yes
Repair
connections or
replace flex
connector
Connect an
RLN4460 test box
(or equivalent) to
the radio side
connector via a
programming
cable
Inject a 225 mV
rms 1.0 kHz tone
into the test box
Audio In port
Is FM
deviation
approximately
3.0 kHz?
No VOCON
problem...

6881094C31-ENovember 16, 2006
Troubleshooting Charts: VCO TX/RX Unlock 5-27
VOCON TX Audio (for kit NNTN5567)—Page 2
1
Voltage = 5.0
V?No
Data present?No Yes
Yes
Yes
Clock
present?No
Yes
2
2
Synchronous
pulses
present?
No
Yes
Replace U401
Replace U501
Replace U501 Replace U501Check signal on
R406 Check Mic_Bias
Line on U501 for
DC Voltage
Replace U501
Check signal on
R405Check signal on
U408 pin 1 while
still applying
audio signal to
radio 

November 16, 20066881094C31-E
5-28Troubleshooting Charts: VOCON RX Audio
5.12 VOCON RX Audio—Page 1
MAEPF-27394-A
* on NTN9564, NNTN4563 & NNTN4819 VOCON boards
** on NNTN4717 VOCON boardProbe R406 for
Frame Sync Signal,
Compare with
RX SAP waveform,
Trace 1
Frame
Sync
Present?
Replace U301*
(FLIPPER) Probe R403 for
Data, Compare
with RX SAP
waveform, Trace 2 Signal
Present?
THD 

6881094C31-ENovember 16, 2006
Troubleshooting Charts: VOCON RX Audio (for kit NNTN5567) 5-29
5.13 VOCON RX Audio (for kit NNTN5567)—Page 1
Check speaker
integrity
Bad SI NAD
Bad 20 dB
Quieting
No Recovered
Audio
No
Speaker OK?
YesReplace Speaker
Connect an
RLN4460 test box
(or equivalent) to
the radio side
connector via a
programming
cable
Inject Standard
Input into antenna
connectorA standard input is an RF
signal at -47 dBm with a 1
kHz tone modulated at 3
kHz for a 25 kHz channel
Audio
present?
1No...