Inspection Procedure 22

INSPECTION PROCEDURE 22: Radio: Distortion on FM only.

DIAGNOSIS

STEP 1. Check that the distortion is present when the radio is tuned to another station.

Q. Does the distortion persist when the radio is tuned to another station?

YES Go to Step 2.

NO The signal from that station is too weak.

STEP 2. Relocate the reception area and check the radio.

Q. When relocating the reception area does the distortion increase or decrease?

YES The cause may be multipath or fading noise. Multipath noise is the echo that occurs when the broadcast signal is reflected by a large obstruction and enters the receiver with a slight time delay relative to the direct signal (repetitious buzzing). A fading or buzzing noise may occur when the broadcast beam is disrupted by obstructing objects and the signal strength fluctuates within a narrow range.

NO Replace the radio and CD player or radio and CD player with CD changer.