• If the place, time, or radio station in which the malfunction occurred can be specified by asking the customer, it is highly possible that the malfunction cause is the radio wave reception environment. If the malfunction symptom is verified, verify under the same conditions (such as place, time, radio station) as the situation described by the customer. If the malfunction symptom cannot be verified under the same conditions as the situation described by the customer, verify the malfunction symptom at a substitute location (such as where radio wave reception is strong/weak).