Fault in tuner or IF amplifier, measuring tuner AGC voltage of 6V is normal, try to change the tuner fault persists. Check the figures in the pre-amp tube Q101 each pole voltage is normal, with 1000PF ceramic capacitors across the surface acoustic wave filter 1,3 feet, improved image clarity, to replace surface acoustic wave filter, store after the automatic station search found in the L section of the image is clear, but in H, U segment textured and lighter noise. Check the relevant automatic frequency adjustment circuit, found IC10115 pin external capacitor C117 is damaged, it will replace the faulty after elimination.nYRservice manual download site