Motorola Astro Xts5000 Detailed 6881094c31 E Manual

November 16, 20066881094C31-E
5-10Troubleshooting Charts: DC Supply Failure
DC Supply Failure (for kit NNTN5567)—Page 1
4
Check Voltage At
C516
Check Voltage At
R518
Check Voltage At
C523
Check Voltage At
C519Ye s
Ye s
Ye sNo
No
No
No
Ye sVoltage
Approximately
1.875 V?
Voltage
Approximately
1.55 V?
Voltage
Approximately
2.9 V?
Voltage
Approximately
5.0 V?Replace U501
Replace VOCON 

6881094C31-ENovember 16, 2006
Troubleshooting Charts: DC Supply Failure 5-11
DC Supply Failure (for kit NNTN5567) —Page 2
MAEPF-27392-C
Check R501,
D502, L501, 
and C504
Check Voltage
at R560Replace
Problem
Component
Voltage
= V2?*Replace
U501
(GCAP II) Check R502,
C506, L502,
and D503 Voltage
= 3.77V+/-5%?
Voltage
= 1.85V+/-5%?Components
OK?ReFLASH
HOST C
Code
Fixed?
End Components
OK?
Check Voltage
at R501Replace
Problem
Component Check Voltage
at B502
(VOCON)
No
Ye sYe s
Ye s
Ye s
Ye sYe s
NoNo
No No...

November 16, 20066881094C31-E
5-12Troubleshooting Charts: DC Supply Failure
DC Supply Failure (for kit NNTN5567) —Page 3
MAEPF-27393-C
Voltage
= 5.0V+/-5%? Check Voltage
at pin 5 of
U505 (VOCON)
No No
No No
No No
No
No Ye s
Ye sYe s
Ye s Ye s
Ye s
Ye s Ye s 3
Check E6, 
C6, C8, and D2 Voltage
= V2?*Component s
OK? Check R503,
D501, C509,
C510, and C508Replace
Problem
Component
Replace U1 
on RF Bo ar d
Replace
Problem
Component Component s
OK?
Check Voltage
at TP7Replace
U2 Check Voltage
at TP5
Check...

6881094C31-ENovember 16, 2006
Troubleshooting Charts: Display Failure (NNTN4563, NNTN4819, NNTN4717 & NNTN5567 VOCON Kits) 5-13
5.5 Display Failure (NNTN4563, NNTN4819, NNTN4717 & NNTN5567 
VOCON Kits)
Page 1
NOTE:The NNTN4563 VOCON board is compatible only with the 7285726C02 display module, 
and the NNTN4819 VOCON board is compatible only with the 7285726C03 display 
module.
MAEPF-27505-B
End Replace
LCD Display
Check integrity
of B101 2.775 V

November 16, 20066881094C31-E
5-14Troubleshooting Charts: Display Failure (NNTN4563, NNTN4819, NNTN4717 & NNTN5567 VOCON Kits)
Display Failure (NNTN4563, NNTN4819, NNTN4717 & NNTN5567 VOCON 
Kits)
Page 2
MAEPF-27506-A
V = 0 V? Check P_S*
at J301, pin 4
No Yes
Ye s No
No Yes
Ye s
No
No No
No No
Ye s
Ye sYe s Ye s 1
Problem
Resolved?
Problem
Resolved?
Problem
Resolved?
Problem
Resolved? Check
REG_SEL
at J301, pin 7 Check RESET
at J301, pin 6
Verify Signal
Path Integrity
and correct Verify Signal
Path...

6881094C31-ENovember 16, 2006
Troubleshooting Charts: Display Failure (NNTN4563, NNTN4819, NNTN4717 & NNTN5567 VOCON Kits) 5-15
Display Failure (NNTN4563, NNTN4819, NNTN4717 & NNTN5567 VOCON 
Kits)
Page 3
MAEPF-27507-A
Low-
Level Pulses
Present? Check Active
Low Status on
both RESET
and CS Use an oscilloscope to check for
a low-level (0V) pulse occurrence
during power-on initialization period.
Use an oscilloscope to check for
either a low-level (0V) pulse or 
high-level (0-V2) occurrence during
power-on...

November 16, 20066881094C31-E
5-16Troubleshooting Charts: Display Failure (NTN9564)
5.6 Display Failure (NTN9564)—Page 1
NOTE:The NTN9564 VOCON board is compatible only with the 7285726C01 display module.
MAEPF-27404-O
End Replace
LCD Display
Check integrity
of B102 1.8

6881094C31-ENovember 16, 2006
Troubleshooting Charts: Display Failure (NTN9564) 5-17
Display Failure (NTN9564)—Page 2
MAEPF-27405-O
V = 1.85V? Check P_S*
at J301, pin 4
No Yes
Ye s No
No Yes
Ye s
No
No No
No No
Ye s
Ye sYe s Ye s 1
V = 1.85V?Problem
Resolved?
Problem
Resolved?
Problem
Resolved?
Problem
Resolved? Check
REG_SEL
at J301, pin 7 Check RESET
at J301, pin 6
Verify Signal
Path Integrity
and correct Verify Signal
Path Integrity
and correct Verify Signal
Path Integrity
and correct Verify Signal...

November 16, 20066881094C31-E
5-18Troubleshooting Charts: Display Failure (NTN9564)
Display Failure (NTN9564)—Page 3
MAEPF-27406-O
Low-
Level Pulses
Present? Check Active
Low Status on
both RESET
and CS Use an oscilloscope to check for
a low-level (0V) pulse occurrence
during power-on initialization period.
Use an oscilloscope to check for
either a low-level (0V) pulse or 
high-level (1.85V) occurrence during
power-on initialization period.No
Ye sNo Ye s 3
Signal
present
at appropriate
level?
Replace...

6881094C31-ENovember 16, 2006
Troubleshooting Charts: Volume Set Error 5-19
5.7 Volume Set Error
 
 
Verify operation
of volume knob
using Button
Test flowchart
Volume Set
Error
YesRefer to Rx
VOCON
Audio flowchart
NoVolume check
OK?
Using a
voltmeter,
measure voltage
at R239 when
volume knob is
at maxVoltage =
V_2.9?Replace R232 Yes
No
Verify control
top/PTT flex
connections
Problem
resolved?Yes
End
No
Replace housing
assembly