Motorola Astro Digital Spectra Digital Spectra Plus Basic 6881076c20 E Manual

							6881076C20-EFebruary 3, 2003
Basic Troubleshooting: Power-Up Error Codes 9-3
9.3.2 ASTRO Digital Spectra Plus
Table 9-2.  ASTRO Digital Spectra Plus Power-Up Error Codes
Error CodeDescriptionError 
Ty p eCorrective Action
ERROR 01/02 FLASH ROM Codeplug 
ChecksumNON-
FATA LReprogram the codeplug.
ERROR 01/12 Security Partition 
ChecksumNON-
FATA LReprogram the security 
partition.
ERROR 01/22 Tuning Codeplug 
ChecksumNON-
FATA LReprogram the tuning 
partition.
FAIL 01/81 FLASH ROM Checksum FATAL Reprogram the radio 
firmware.
FAIL 01/82 FLASH ROM Codeplug 
ChecksumFATAL Reprogram the codeplug.
FAIL 01/88 External RAM Fail FATAL Turn the radio off, then on.
FAIL 01/90 General Hardware FATAL Turn the radio off, then on.
FAIL 01/92 Security Partition 
ChecksumFATAL Reprogram the security 
partition.
FAIL 01/93 Flashport AUTHENT 
CODE FailureFATAL Replace the VOCON board.
FAIL 01/98 Internal RAM Fail FATAL Replace the VOCON board.
FAIL 01/A2 Tuning Codeplug 
ChecksumFATAL Reprogram the tuning 
partition.
FAIL 02/81 DSP ROM Checksum FATAL Reprogram the DSP 
firmware.
FAIL 02/88 DSP RAM Fatal Error FATAL Turn the radio off, then on.
FAIL 02/90 General DSP Hardware 
FailureFATAL Turn the radio off, then on.
ERROR 05/10 Control Head Hardware 
ErrorNON-
FATA LTurn the radio off, then on.
FAIL 05/81 Control Head ROM 
Checksum ErrorFATAL Replace the control head.
ERROR 06/10 Aux Control Head 
Hardware ErrorNON-
FATA LTurn the radio off, then on.
FAIL 06/81 Aux Control Head ROM 
Checksum ErrorFATAL Replace the aux. control 
head.
ERROR 08/10 Siren Hardware Error NON-
FATA LTurn the radio off, then on. 
						

							February 3, 20036881076C20-E
9-4Basic Troubleshooting: Operational Error Codes
9.4 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 the following tables to aid in understanding particular operational error 
codes.
9.4.1 ASTRO Digital Spectra
FAIL 08/81 Siren ROM Checksum 
ErrorFATAL Replace the siren.
ERROR 09/10 Secure Hardware Error NON-
FATA LReplace the secure module.
FAIL 09/90 Secure Hardware Fatal 
ErrorFATAL Replace the secure module.
ERROR 12/10 VRS Hardware Error NON-
FATA LTurn the radio off, then on.
FAIL 12/81 VRS ROM Checksum 
ErrorFATAL Replace the VRS.
ERROR 1C/10 TRC Hardware Error NON-
FATA LTurn the radio off, then on.
FAIL 1C/81 TRC ROM Checksum 
ErrorFATAL Replace the TRC.
Table 9-3.  ASTRO Digital Spectra Operational Error Codes
Error CodeDescriptionCorrective Action
FAIL 001 Synthesizer Out-of-Lock 1. Reprogram codeplug
2. Replace RF board.
FAIL 002 Selected Mode/Zone Codeplug 
Checksum ErrorReprogram codeplug.
Table 9-2.  ASTRO Digital Spectra Plus Power-Up Error Codes (Continued)
Error CodeDescriptionError 
Ty p eCorrective Action 
						

							6881076C20-EFebruary 3, 2003
Basic Troubleshooting: Transmitter Troubleshooting 9-5
9.4.2 ASTRO Digital Spectra Plus
9.5 Transmitter Troubleshooting
The following table can help you troubleshoot problems that might occur in the transmitter section of 
your radio.Table 9-4.  ASTRO Digital Spectra Plus Operational Error Codes
Error CodeDescriptionError 
Ty p eCorrective Action
FAIL 001 Synthesizer Out-of-Lock NON-
FATA L1. Reprogram codeplug
2. Replace RF board.
FAIL 002 Personality checksum or 
system block errorNON-
FATA LReprogram codeplug.
Table 9-5.  Transmitter Troubleshooting Chart
SymptomPossible CauseCorrection or Test (Measurements 
Taken at Room Temperature)
No RF Power 
OutputTX Power Level 
ProgrammingCheck TX power level programming (from 
the appropriate radio programming 
software).
No Keyed 9.4 Vdc from 
Command BoardCheck for keyed 9.4 Vdc on J500 pin 15 
with transmitter keyed.
If none, replace the command board.
No Injection to Power 
Amplifier1. Check the lock line (J500 pin 14). If not 
less than 2 Vdc, go to the Synthesizer 
Troubleshooting Chart on 
page 9-12.
2. Measure injection, which should be
> +18 dBm.
If low, replace the VCO board.
Power Amplifier Measure PA control voltage (P503 pin 2).
If >6 Vdc, replace the PA board.
Power Control Circuit If PA control voltage above was

						

							February 3, 20036881076C20-E
9-6Basic Troubleshooting: Transmitter Troubleshooting
No Modulation VCO Board 1. All modulation testing should be done 
with the radio keyed and 1Vrms on the 
microphone high line of the microphone.
2. Is radio properly tuned? (See Chapter 
6. Radio Alignment Procedure.)
3. Is there > 400 mVrms at J500 pin 11?
If so, replace the VCO board.
Command Board If there is > 400 mVrms (ac coupled) at 
P501 pin 49 and not at J500 pin 11, 
replace the command board.
VOCON Board If there is >200 mVrms modulation at J501 
pin 39 and no modulation at J501 pin 49, 
replace the VOCON board.
Distorted 
ModulationBandwidth Is the correct bandwidth selected (use the 
appropriate radio programming software)? 
Is radio properly tuned?
(See 
Chapter 6: Radio Alignment 
Procedure
.)
Compensation Not Set/
Working
(DPL Distorted)Check compensation setting.
If compensation won’t adjust, go to Can’t 
Set Compensation below.
VOCON Board With 80 mVrms on the mic high line, is the 
signal on pin 49 of P501 distorted (ac 
coupled)?
If so, replace the VOCON board.
Command Board With 80 mVrms on the mic high line, is the 
output of the command board VCO Mod 
(pin 11 of J500) distorted?
If so, replace the command board.
VCO Board Replace VCO board.
Table 9-5.  Transmitter Troubleshooting Chart (Continued)
SymptomPossible CauseCorrection or Test (Measurements 
Taken at Room Temperature) 
						

							6881076C20-EFebruary 3, 2003
Basic Troubleshooting: Transmitter Troubleshooting 9-7
Bad 
Microphone 
SensitivityCheck Deviation and 
CompensationRetune, if necessary.
Microphone Speak loudly into the microphone while 
monitoring the microphone line (pin 6 of 
P502).
If it is not >80 mVrms, then replace the 
microphone.
Command Board With 80 mVrms on the mic high line, check 
pin 39 of P501.
If not >100 mVrms (ac coupled), replace 
the command board.
VOCON  Board With 80 mVrms on the mic high line, check 
pin 49 of P501.
If not >100 mVrms (ac coupled), replace 
the VOCON board.
Command Board With 80 mVrms on the mic high line, 
monitor the VCO mod line (pin 11 on 
J500). Voltage should be >200 mVrms.
If not, replace the command board.
VCO Board If correct voltage was found on pin 11 of 
J500, replace the VCO board.
No/Low 
signaling (PL, 
DPL, Trunking, 
MDC)Check Programming Reprogram codeplug.
Table 9-5.  Transmitter Troubleshooting Chart (Continued)
SymptomPossible CauseCorrection or Test (Measurements 
Taken at Room Temperature) 
						

							February 3, 20036881076C20-E
9-8Basic Troubleshooting: Transmitter Troubleshooting
NOTE:The P501 pins can be probed on the extender cable (see the P501 Extender Cable 
diagram on 
page 10-6).
Can’t Set 
CompensationVOCON Board Vary deviation and compensation controls 
from maximum to minimum.
With the low frequency source active 
(using the appropriate radio programming 
software–see 
Chapter 6: Radio 
Alignment Procedure
) voltage or pin 48 
of P501 should vary from 3 mVrms.
With the high frequency source active, 
voltage on pin 49 of P501 (ac coupled) 
should vary from 3 
mVrms.
Command Board 1. All modulation testing should be done 
with the radio keyed and 1 Vrms on the 
mic high line of the microphone.
Check that normal voice deviation is OK.
Otherwise, go to No Modulation or Bad 
Microphone Sensitivity.
2. Set deviation and compensation 
controls to maximum.
Voltage on pin 17 of J500 should be > 3 V 
p-p.
Voltage @ pin 11 of J500 should be >3 V 
p-p.
If not, replace the command board.
RF Board If maximum deviation can be set to > 5.0 
kHz, but compensation cannot be set, 
then replace the RF board.
Otherwise, replace the VCO board.
Table 9-5.  Transmitter Troubleshooting Chart (Continued)
SymptomPossible CauseCorrection or Test (Measurements 
Taken at Room Temperature) 
						

							6881076C20-EFebruary 3, 2003
Basic Troubleshooting: Receiver Troubleshooting 9-9
9.6 Receiver Troubleshooting
The following table can help you troubleshoot problems that might occur in the receiver section of 
your radio.
Table 9-6.  Receiver Troubleshooting Chart
SymptomPossible CauseCorrection or Test (Measurements Taken 
at Room Temperature)
Radio Dead, 
Display Does 
Not Light UpBlown Fuse Check fuse in red lead of power cable (or green 
lead if used.)
On/Off Switch (Control 
Head)Check for SWB+ at pin 31 of J502 on the 
command board.
If not there, check for SWB+ at pin 21 of P502 on 
the control head.
Regulators (Command 
Board)Check for 9.6 Vdc on pin 10 of J500 and +5V on 
pin 1 of J500.
If not there, check for A+ at pin 30 of 502.
If OK, then replace the command board.
ASTRO Spectra Plus 
VOCON BoardCheck U410 pin 1 for 1.8 Vdc.
Check U411 pin 1 for 3.0 Vdc.
Check TP401 for 16.8 MHz.
If any of these is missing, replace the VOCON 
board.
Radio Dead, 
Display Lights 
UpAudio PA Circuit Check continuity of F500 on command board.
If open, check for speaker leads shorted to 
ground, replace. F500 is located just above U450.
Synthesizer (RF Board) Check the synthesizer A Clock line (pin 19 of 
J500).
If >3V, then go to the Synthesizer Troubleshooting 
Chart on 
page 9-12.
If 
						

							February 3, 20036881076C20-E
9-10Basic Troubleshooting: Receiver Troubleshooting
No Receiver 
Audio or 
Receive Does 
Not UnsquelchAudio PA Circuit 1. Check codeplug to ensure correct frequency 
and signaling (PL, DPL) is enabled (use the 
appropriate radio programming software).
2. Check continuity of F500 on command board.
If open, check for speaker leads shorted to 
ground. Replace, if necessary.
Regulators (Command 
Board)Check for 9.6 Vdc on pin 10 of J500 and +5V on 
pin 1 of J500.
If not there, then check for A+ at pin 30 of P502 
and SWB+ at pin 31 of P502.
If OK, replace the command board.
RF Board Replace RF board.
VOCON Board Replace VOCON board.
Audio 
Distorted or 
Not Loud 
EnoughCodeplug Is the codeplug properly configured including 
bandwidth and signaling?
VOCON Board Is there >100 mVrms audio on pin 40 of P501?
If not, replace VOCON board.
Synthesizer Not On 
Frequency/WorkingCheck synthesizer frequency across pins 14 and 
16 of P503.
If off by more than 250Hz, then go to the 
Synthesizer Troubleshooting Chart on 
page 9-12.
Command Board Replace command board.
Table 9-6.  Receiver Troubleshooting Chart (Continued)
SymptomPossible CauseCorrection or Test (Measurements Taken 
at Room Temperature) 
						

							6881076C20-EFebruary 3, 2003
Basic Troubleshooting: Receiver Troubleshooting 9-11
RF Sensitivity 
PoorSynthesizer Not On 
Frequency/WorkingCheck local oscillator frequency.
If off by more than 250 Hz, then go to the 
Synthesizer Troubleshooting Chart (
page 9-12).
Antenna Switch 
(Amplifier Board)Check insertion loss from antenna connector to 
Rx front end coax from the PA.
If loss is less than 1.8 dB, then the problem is in 
the transceiver housing.
Receiver Front-End 
Assembly or VCO 
Board1. Measure the gain of the front end assembly by 
injecting a signal at the desired receive frequency 
and measuring the output level at 109.65 MHz.
Net conversion gain should be >8 dB.
2. If conversion gain is 
						

							February 3, 20036881076C20-E
9-12Basic Troubleshooting: Synthesizer Troubleshooting
NOTE:The P501 pins can be probed on the extender cable (see the P501 Extender Cable 
diagram on 
page 10-6).
9.7 Synthesizer Troubleshooting
The following table can help you troubleshoot problems that might occur in the synthesizer section of 
your radio.
Table 9-7.  Synthesizer Troubleshooting Chart
SymptomPossible CauseCorrection or Test (Measurements 
Taken at Room Temperature)
Does Not Lock 
on Any 
ChannelVCO With radio in receive mode, measure pin 1 
of J601 using a high impedance probe.
Measured level should be -5 dBm ±6 dB, 
and the frequency should be 370 to 
380MHz.
If not, replace the VCO board.
Reference Oscillator/RF 
BoardIs there >1.5 Vp-p of 2.1 MHz on pin 21 of 
J500?
If not, replace the RF board.
VOCON Board Do both the chip select lines (pins 16 & 20 
of J500) go low during mode changes?
Is there data on the clock & data lines 
going into the RF board (pins 18 & 19 of 
J500)?
If not, replace the VOCON board.
Does Not Lock 
on Some 
ChannelsProgramming Check the mode programming information 
to ensure that the correct frequency 
programming information has been 
entered.
VCO With the radio in receive mode; unplug the 
loop feedback coax from the VCO board 
to the RF board.
Measured level should be -5 dBm ±5 dB, 
and the frequency should be 370 to 380 
MHz.
If not, replace the VCO board.
RF Board Replace the RF board.
Does Not Lock 
in Tx (or 
TalkaroundRF Board Check the Aux bit states (pin 9 & 11 J601). 
When changing from receive to transmit to 
talkaround, pin 9 and 11 of J601 should 
alternate between a high voltage (>8V) 
and a low voltage (