48
Simple Trouble Shooting
"+" and "-" polarities of power connection are reversed. Connect Red lead to pos-
itive terminal and black lead to negative terminal of DC power supply.
Check and solve problem resulting in blown fuse and replace with new one.
Adjust display brightness level to high.
Squelch is muted. Reduce squelch level. CTCSS/DCS and DTMF/2 TONE/5
TONE Squelch is active. Turn them off.
Power is on, but nothing
appears on the display.
Fuse is blown.
Display is too dark.
No sound comes from
speaker.
Key and Dial doesn't
work.
Press PTT key but TX
doesn't work.
Problem
Possible Causes and Potential Solutions
Microphone or antenna connection is poor. Connect them properly.
Keypad lock is activated. Disable it.
47
Factory Reset Operation
Procedure:
1. Turn the radio off.
2. Press and hold the
LEFT [LOW]
key while turning the radio on.
3. Rotate the
DIAL
to select the resetting menu.
F-1 SETMOD RESET:
Reset the menu settings to their factory defaults.
F-2 HYPER RESET:
Clears the Hyper Memory settings to factory defaults.
F-3 MEMORY RESET:
Clears the regular Memory settings to factory defaults.
F-4 ALL RESET:
Clears all the memories and other setting to factory defaults.
4. Once you have made your selection in step 3, short press the
[SET]
key to complete the reset procedure.
# 42 HSD.TYP
Function: activate 2 TONE/ 5 TONE/ DTMF Squelch.
Available Values: OFF / 2 TONE / 5 TONE / DTMF
Default: OFF
Содержание TH-7800
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