Service Manual Part 1
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This checks that the local base station repeater is on air and checks that the correct base
station frequency is programmed into the radio.
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Reprogram the first normal hunt channel to be the base station repeater channel
number.
Enter test mode (refer to Section 5.8, “Trunked Radios: Test Mode”).
Press the front panel key, and the FFSK should be audible.
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Enter test mode (refer to Section 5.8, “Trunked Radios: Test Mode”).
Enter the base station repeater channel number, and the FFSK should be audible.
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This checks that the radio is hunting the base station control channel. Refer to the
“Trunked Radios: Radio Won’t Acquire A Control Channel” fault finding chart in Sec-
tion 5.10.11.
Do not enter test mode.
Monitor pin 15 of IC510 (modem IC) on the T2030 or T2040 logic PCB, with a
scope probe.
FFSK should be visible for 100ms as the radio scans (hunts) through the channels.
If the radio does not lock onto the required channel, this indicates one of the fol-
lowing faults:
• The parameters on the network identity page are incorrect.
• The acquisition authorisation is incorrect.
• The signal is not opening the mute (receiver mute fault, refer to the “Receiver
Mute Faults” fault finding chart in Section 5.10.6).
• The programmed logical channel number is incorrect (even if the frequencies
are correct).
C4