3. BAD SOUND QUALITY (a) Sound quality bad when radio played. Possible causes: • Multipath interference of excessive interception • Tuner dial not synchronized with station • Defective antenna, cable or booster • Speaker improperly installed • Vibration sound from components near speaker • Defective speaker • Defective radio TEST 1 Is sound quality bad in certain areas only? Yes → FM multipath interference and excessively strong AM reception near broadcasting station cannot be avoided in most cases. No ↓ Is tuner dial properly synchronized? Yes → Temporarily install another antenna. Okay? → Yes → Inspect antenna, cable and booster, and repair as necessary No ↓ No ↓ Properly synchronize Proceed to Test 2. TEST 2 Is speaker installed correctly (not loose or too tight)? Yes → Is there a vibration sound coming from components near speaker? → No → Temporarily install another speaker. Okay? → Yes → Replace speaker. No ↓ Yes ↓ No ↓ Properly install. If speaker Repair Replace radio. frame bent, replace. NOTE: FM distortion tends to increase sharply if the tuner is not synchronized.