Sharp 13VT-K100 Service Manual

13VT-K100/15013VT-CK1051SOUND PLAYBACK MODE TROUBLESHOOTING FLOW CHART NO.1-17No playback.YESYESYESYESYESYESNONONONONONONOIs there a signal at pin (74) ofIC2201?Is there "L" level at pin (72) ofIC2201?Is there a signal at pin (85) ofIC2201?Check BIAS CTL (H) line.Replace defective parts.Readjust azimuth andheight.Replace A/C head.Check AUDIO MUTE (H) line.Replace IC2201.Is there "L" level at pin (70) ofIC2201?Are azimuth and height of the A/Chead properly adjusted?Check line between pin (85) of IC2201 pin (1) of IC402.Are the FFC MH-AA and the PBAMP's peripheral parts around pins(75)~(78) of IC2201 normal?Clean A/C head.