{"model":"mk2","model_name":"MK2 Supra","vehicle":"Toyota Supra A60 (1982–1986, 5M-GE)","document":"Repair Manual","section":"BE","section_name":"Body Electrical System","page":107,"pages_in_section":121,"title":"3. Bad Sound Quality","section_header":"Body Electrical System — Radio, Stereo Tape Player and Antenna","ocr_text":"3. BAD SOUND QUALITY\n(a) Sound quality bad when radio played.\nPossible causes:\n• Multipath interference of excessive interception\n• Tuner dial not synchronized with station\n• Defective antenna, cable or booster\n• Speaker improperly installed\n• Vibration sound from components near speaker\n• Defective speaker\n• Defective radio\n\nTEST 1\n\nIs sound quality bad in certain\nareas only?\n\nYes → FM multipath interference and excessively strong AM reception near broadcasting station cannot be avoided in most cases.\n\nNo ↓\n\nIs tuner dial properly synchronized?\n\nYes → Temporarily install another antenna. Okay? → Yes → Inspect antenna, cable and booster, and repair as necessary\n\nNo ↓                                                                 No ↓\n\nProperly synchronize                                    Proceed to Test 2.\n\nTEST 2\n\nIs speaker installed correctly\n(not loose or too tight)?\n\nYes → Is there a vibration sound coming from components near speaker? → No → Temporarily install another speaker. Okay? → Yes → Replace speaker.\n\nNo ↓                                                                      Yes ↓                                                   No ↓\n\nProperly install. If speaker                                Repair                                                Replace radio.\nframe bent, replace.\n\nNOTE: FM distortion tends to increase sharply if the tuner is not 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