Guardian G25AMK005, Technical Manual

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G U A R D I A N V H F 1 1 0 W M O B I L E 7-1
CHAPTER 7: TROUBLESHOOTING
7.1 Introduction
This chapter is included to help qualified service personnel troubleshoot and repair the Guardian radio. If questions
or problems arise, contact Datron Technical Support Services Group, Datron World Communications Inc., 3030
Enterprise Court, Vista, CA 92083, or phone (760) 597-3755, or email to:
guardianservice@dtwc.com . For
additional troubleshooting information, refer to the following sections of this manual:
•
Chapter 2: Hardware Theory of Operation
•
Chapter 3: Software Theory of Operation
•
Chapter 4: Installation, Adjustment and Operation
•
Chapter 11: Schematics
This chapter contains basic functional tests. Once the problem is corrected, restart the tests.
7.2 Radio Functional Tests
The tests in this chapter require the radio to be tested as programmed. It is best to program all 3 auxiliary buttons to
Hi/Lo power, the emergency button to emergency, and the toggle switch to zone select. Program the radio with
eighteen channels, 3 zones, and 1 bank. Put 16 channels in zone 1, 1 channel in zone 2, and 1 channel in zone 3. For
all of the channels, use assigned transmit and receive frequencies, turn transmit squelch off, and set receive squelch
to carrier, level 8. When more than one remove and receive tasks are shown in a block, they are listed in order from
most to least probable for fixing the problem. It is recommended that the remove and repair tasks are tried one at a
time, and the radio re-tested until the problem is fixed.
The tests outlined below provide an overall check of the radio to ensure it is working properly.
7.2.1 Power-On Test
This test ensures that the radio turns on, the latest software version number briefly appears, a beep is heard, and an
operational screen appears on the LCD.
7.2.2 Buttons and Switches Test
This test ensures that the PTT, auxiliary buttons, toggle switch, emergency key, keypad, on/off/volume switch, and
channel switch work.
7.2.3 Transmit Test
This test ensures the radio has the required transmit power, frequency accuracy, and deviation.
7.2.4 Receive Test
This test ensures the radio LED works, a 1 kHz tone is heard, and that SINAD is within specified limits.
7.2.5 Audio Test
This test ensures that the radio’s internal speaker and microphone are working. If the radio fails this test, please
contact Datron for radio servicing.