Table 18. Transmitter Troubleshooting Chart - Motorola ASTRO XTS 3500 Basic Service Manual

Symptom
No RF Power Out
No Modulation;
Distorted Modulation
Bad Microphone Sensitivity
No/Low Signalling
(PL, DPL, MDC)
Can't Set Deviation Balance
Symptom
No " K K K K E E E E Y Y Y Y L L L L O O O O A A A A D D D D " on Radio Display When Keyloading
Cable is Attached to the Radio Side Connector
Keyloader Displays "
F F F F A A A A I I I I L L L L
Note: Keyloaders "T----AX" and "T----BX" must be upgraded to "T----CX" and "T----DX" in order to
keyload an XTS 3500 radio.
Table 18 Transmitter Troubleshooting Chart
Possible Cause
1. TX Power Level or Frequency
2. No PTT From Control Top
3. No Injection To Power Amplifier
1. Programming
2. VOCON Board
1. Check Deviation and Compensation
2. Microphone
1. Programming
2. VOCON Board
RF Board
Table 19 Encryption Troubleshooting Chart
."
Correction or Test (Measurements
Taken at Room Temperature)
Check TX power level and frequency
programming (from RSS).
Send radio to depot.
Check deviation and compensation
settings using the RSS.
Send radio to depot.
Realign if necessary.
Send radio to depot.
Check Programming
Send radio to depot.
Send radio to depot.
Possible Cause
1. Defective Keyload Cable
2. Defective Radio
1. Wrong Keyloader
2. Bad Keyloader
3. Defective Radio
Corrective Action
Send radio to depot.
Make Sure the Keyloader
is a "T----CX" or
"T----DX" Keyloader.
Try Another Keyloader
Send radio to depot.
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