How to Diagnose the Trouble Related to the Radio

How to diagnose the trouble when you can't receive any radio station, or at the extremely poor of the radio sensitivity

1.	Confirm the receiving conditions of the radio. Do you receive each broadcasting station normally? YES - Radio operation is normal.n NO - Go to 2.

2.	Confirm whether the antenna jack is inserted in the audio unit. Is an antenna jack being inserted into the audio unit completely? YES - Go to 3. NO - An antenna jack is inserted in the audio unit completely again.n

3.	Check for continuity between the antenna jack and the roof antenna. Is there continuity? YES - Go to 4. NO - Replace the roof antenna.n

4.	Check for continuity between signal live centering signal line and the antenna jack outside of ground terminal. Is there continuity? YES - Replace the roof antenna.n NO - Replace the audio unit.n

How to diagnose the trouble which noise appears in when it is listening to the radio

1.	Confirm the noise conditions of the radio. Does the noise intercept any place, any time? YES - Go to 2. NO - Radio operation is normal.n

2.	Confirm whether the noise of the radio influenced by electric wave or not. Does it seem to be influenced by the electric wave? YES - Radio operation is normal.n NO - Replace the audio unit.n