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 determined
to be in error.  Verify
logic levels at R235,
R236, R239, and R241
for each channel.Channel
Select Error
No NoYe s
Ye s Verify similar
operation directly
at U1 on controls
flex assembly
RTA3
(R241)RTA2
(R239)RTA1
(R236)RTA0
(R235) Channel
Probe Point
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
01
1
1
1
0
0
0
0
1
1
1
1
0
0
0
01
1
0
0
1
1
0
0
1
1
0
0
1
1
0
01
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16 
						

							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) Failure in control top/PTT or keypad flex assembly
2) Bad Connection
3) Defective Switches or pads
4) Defective A/D port in GCAP II
5) Defective MAKO A/D ports (for kit NNTN5567)
Synopsis
Button Table
Button
PTT
Top Button (Emergency)
Side Button 1 (Monitor)
Side Button 2
Side Button 3
Channel Select (Frequency)
Volume Control Knob
Zone SelectCode
1/ 0-1
3/ 0-1
96/ 0-1
97/ 0-1
98/ 0-1
4/ 0-15
0/ 0-244
65/ 0-2
128/1130/1 135/1
136/1 Home Alpha129/1134/1 132/1 131/1133/1
53/1
5JKL 52/1
4GHI54/1
6MNO 50/1
2ABC 49/1
151/1
3DEF
48/1
0 58/1
*
59/1
#
56/1
8TUV 55/1
7PRS57/1
9XYZ
    
Navigation
Button 
						

							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 be near V_2.9 For the toggle
(TG1) button the voltages for the
three states are 2.9V, 1,45 V, and 0
V.Synopsis
This chart relates to the failures in
reading the top and side buttons.
The resistors correspond to the
following signals:
R231: TG1
R233: Monitor
R234: Secure Clear
R256: Scan
This chart is valid for NCN 6186,
 NTN5532A and NNTN5567 kits 
Yes
Yes
No
Us RSS to enable
button
Button voltages
OK?
Replace U401No
Verify physical
operation of
buttons
Phy sical
operation OK?Replace chasis No
Verify connections
and control top/
PTT flex circuit as
necessaryYes 
						

							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
0V?Check parts
around FET. If
OK, replace FET
No BJT
emitter voltage
>1.2V?Check parts
around U300. If
OK, replace U300Yes
Check parts 
around U302.
If OK, replace
Q302No Is pin
19 of VCOBIC
low for RX and
4.5 for TX?Remove
VCO buffer
shield (SH302)
Check parts
around Q301. I
fOK, replace Q301  Check parts
around U2. If
OK, replace U2
Remove
VCO shield
Check parts
around U202. If
OK, replace U202Sniff
frequency near
VCO shield
Check if VCO
is locked using
spectrum analyzerSniff: Using an inductive field probe
  as an antenna to measure
   frequency. Place the probe
     approximately 1/2 inch away
          from components to be sniffed.
Q302   VC01
Q306   VC02
Q309   VC03Field Effect 
Transistor (FET)
Q301   VC01
Q303   VC02
Q308   VC03 Bi-polar Transistor (BJT)
Bi-polar Transistor (BJT)
Q302   RX1
Q301   RX2
Q304   TX 
Field Effect
Transistor (FET)
Q306  RX1  Aux 2
Q305  RX2  Aux 3
Q308  TX     Aux 4 
						

							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
Microphone and
Flex Connector
Ye sNo
Ye s Ye s
No
12 No
Probe Voltage
at U509, pin 5
Verify Integrity
of Mic path up 
to U509
Is
1 kHz Signal
present at approx.
14 mV rms?
No
Ye s 
						

							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 s
End Problem
Resolved?
Ye s 1
2
1 No
No
End Replace
U501
(GCAP II)
Is
1 kHz signal
present at about
14 mV
rms?
Problem
Solved?No
Ye s
NoYe s
256 kHz Square Wave Clock*** on NTN9564, NNTN4563 & NNTN4819 VOCON boards
** on  NNTN4717 VOCON board  
* on NTN9564, NNTN4563 & NNTN4819 VOCON board
s
** on  NNTN4717 VOCON board  
Replace U401** 
						

							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 found. Yes
No
Voltage > 7.0
mV rms?Replace C554
and/or 
C5 55 No
Voltage > 7.0
mV?1Yes
No
Replace L207
and/or L208 Yes
 
 
 
 
 
 
Check voltage on
C554 and C555 
						

							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
THD < 2 %No
Check contacts at
M102Yes
1
All signals
present?
YesReplace U501
Replace U401Yes
No
Check RX SAP
port signal
integrity as per
chapter 6
Check distortion
of signal at R597
and R598Replace U501