Uniden UM435 Owner s Manual - Page 41
Maintenance And Troubleshooting
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MAINTENANCE AND TROUBLESHOOTING Due to its rugged design, your radio requires very little maintenance. However, it is a precision electronic instrument, so you should follow a few precautions: xx If the antenna has been damaged, you should not transmit except in the case of an emergency. A defective antenna may cause damage to your radio. xx You are responsible for continued FCC technical compliance of your radio. xx You should arrange for periodic performance checks with your dealer. Problem Things to Try Check the power connections. The radio won't power on. Check the fuse. Check the master battery switch and branch circuit that connect to the radio. Make sure you are not in weather or scan mode. Make sure you are not trying to transmit on a receiveonly channel (see the channels and frequency tables beginning on page 37). The radio won't transmit. Make sure you are transmitting at the correct power level for this channel (see the channels and frequency tables beginning on page 37). Noise comes out of the speaker all the time I can't hear anything (no volume) from the speaker. I can transmit, but no one can hear me. The display flashes, and I don't know why. Make sure the duration of each transmission is less than 5 minutes. Adjust the squelch level; it is probably too low. Adjust the squelch level; it is probably too high. Check your UIC channel settings {see Setting the UIC channel mode (USA/CAN/INT) on page 4}. The display will flash if the radio is in a watch mode or in scan mode. Try turning off scanning (page 8), Weather Alert Watch (page 10), or Triple/Dual Watch (page 13). I can't read the display. Adjust the contrast and backlight brightness level (see page 14). The display is too bright at night. Adjust the backlight brightness level. Turn off the radio; hold CALL-MENU button and turn it back on (see page 14). I can't see any words on the display. Reset the radio back to the default brightness level: turn off the radio; hold the CALL-MENU button and turn it back on. 33