BE–90 BODY ELECTRICAL SYSTEM – AUDIO SYSTEM 3 Radio NOISE PRESENT BUT AM–FM NOT OPERATING W : w/ Power Amplifier WO : w/o Power Amplifier Is power for the antenna being output from the radio assembly? No → Radio assembly faulty. Yes WO W Is power for the antenna being output from the power amplifier? No → Power amplifier faulty. Yes Go to No. 32 If radio side faulty W WO Radio assembly faulty. Is tape player operating normally? Yes → Radio assembly faulty. No Hissing sound from speaker? No → Power amplifier faulty. Recheck system after repair. Yes Radio assembly faulty. Recheck system after repair.