Listen Technologies LR-300, LR-500, LR-400 user manual My batteries are not charging

Receiver Troubleshooting

Receiver Troubleshooting continued

I cannot change channels when pressing the UP and DOWN buttons or the SEEK button.

The unit is locked. Press the SEEK button for 5 seconds to unlock.

When I change channels, only certain channels are accessible.

The unit has been programmed to tune to only certain channels (LR-500 only). You can change these channel lock-out selections by re-programming the unit (see page 16).

My batteries are not charging.

Make sure the battery switch is in the NiMH setting and that you are using NiMH (Nickel Metal Hydride) batteries. Make sure you are using only a Listen supplied charging unit or transformer. Never try to charge alkaline or NICAD batteries.

I want to run the unit from a wall transformer.

Simply plug a Listen approved transformer (LA-202) to the CHG/PWR connector on the side of the unit. Batteries do not need to be installed when operating the unit with a wall transformer; however, if you have NiMH batteries installed and the BATTERY select switch is set to NiMH, the batteries will charge while the unit is being used.

It’s confusing for users to have 57 choices when switching between channels.

Use the programming feature (only available in the LR-500) to limit the number of channels accessible by users.