Motorola Sse 5000 6881094c12 A Manual

Chapter 8 Troubleshooting
The purpose of this chapter is to aid in troubleshooting problems with the SSE 5000 radio. It is 
intended to be detailed enough to localize the malfunctioning circuit and isolate the defective 
component. 
8.1 Voltage Measurement and Signal Tracing
It is always a good idea to check the battery voltage under load. This can be done by checking the 
OPT_B+_VPP pin at the accessory connector (pin 8). The battery voltage should remain at or above 
7.0 Vdc. If the battery voltage is...

November 11, 20046881094C12-A
8-2Troubleshooting: Power-Up Error Codes
8.3 Power-Up Error Codes
When the radio is turned on (power-up), the radio performs self-tests to determine if its basic 
electronics and software are in working order. When you turn the radio on normally, the radio 
performs a limited self-test. This allows the radio to achieve full power within two seconds. To allow 
the radio to perform a full self-test (which extends the time required to achieve full power), press and 
hold the...

6881094C12-ANovember 11, 2004
Troubleshooting: Operational Error Codes8-3
8.4 Operational Error Codes
During radio operation, the radio performs dynamic tests to determine if the radio is working properly. 
Problems detected during these tests are presented as error codes on the radio’s display. The 
presence of an error code should prompt a user that a problem exists and that a service technician 
should be contacted. Use Table 8-3 to aid in understanding particular operational error codes.
8.5 Receiver...

November 11, 20046881094C12-A
8-4Troubleshooting: Transmitter Troubleshooting
8.6 Transmitter Troubleshooting
Table 8-5 lists the possible causes of, and corrections for, transmitter problems.
8.7 Encryption Troubleshooting
Table 8-6 lists the possible causes of, and corrections for, encryption problems. Table 8-5.  Transmitter Troubleshooting Chart
SymptomPossible CauseCorrection or Test (Measurements 
Taken at Room Temperature)
No RF Power Out 1. TX Power Level or Frequency Check TX power level and...

Chapter 9 Troubleshooting Charts
This section contains detailed troubleshooting flowcharts. These charts should be used as a guide in 
determining the problem areas. They are not a substitute for knowledge of circuit operation and 
astute troubleshooting techniques. It is advisable to refer to the related detailed circuit descriptions in 
the theory of operation sections prior to troubleshooting a radio.
9.1 List of Troubleshooting Charts
Most troubleshooting charts (see Table 9-1) end up by pointing to...

November 11, 20046881094C12-A
9-2Troubleshooting Charts: Main Troubleshooting Flowchart
9.2 Main Troubleshooting Flowchart
MAEPF-27403-A
Start
Is TX
Deviation
OK? Go to
TX RF
flowchart
Go to 
VOCON
RX Audio
flowchartReceive 
Audio?
Good
SINAD?
Buttons
Functional?
EndGo to either
Display Failure or
Power-Up Failure
flowchart
See Button
Test flowchartError
Messages on
RSS? Ye s
Ye s
Ye sYe s
Ye s
Ye s
Ye s
Ye s
Ye sNo
No
No
No
No
NoNo
No
No Good
power-up
Self-Test?Error
Message?Display
Model?
See Table...

6881094C12-ANovember 11, 2004
Troubleshooting Charts: Power-Up Failure9-3
9.3 Power-Up Failure—Page 1
MAEPF-27389-D
Radio
Power-Up
Failure
Probe
32.768 kHz
Clock at R316
Signal
Present? Signal may appear
for a very short period
of time (50 ms). Use
an oscilloscope with
trigger to capture signal. 
Verify integrity
of C308 and
C309 Verify Standard
Bias in
Table 5-1
Standard
Bias OK? Isolate and
Repair Problem
See DC Supply
Failure flowchart
No No
Ye s
Ye s
12 

November 11, 20046881094C12-A
9-4Troubleshooting Charts: Power-Up Failure
Power-Up Failure—Page 2
Investigate
Clock Buffer
Components and
Isolate ProblemThis signal may
contain harmonics
and, therefore, may
not appear as a 
perfect sinewave.
Signal may
appear for a very
short period of
time (50ms). Use
an oscilloscope
with trigger to
capture signal.
Refer Board to
Service Depot for
Reflash, Patriot,
SRAM, and
FLASH AnalysisInvestigate
16.8 MHz
Reference
Oscillator Probe
16.8 MHz
Signal at R615
Signal...

6881094C12-ANovember 11, 2004
Troubleshooting Charts: DC Supply Failure9-5
9.4 DC Supply Failure—Page 1
NOTE:Since the failure of a critical voltage supply might cause the radio to automatically power 
down, supply voltages should first be probed with a multimeter. If all the board voltages 
are absent, then the voltage test point should be retested using a rising-edge-triggered 
oscilloscope. If the voltage is still absent, then another voltage should be tested using the 
oscilloscope. If that voltage...

November 11, 20046881094C12-A
9-6Troubleshooting Charts: DC Supply Failure
DC Supply Failure—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 1
2
32 No
* per...