Sound is normal, explain the power part, public channel, sound is normal work. And public channel and sound, all by line flyback power supply, so the scanning circuit work is normal. UXfservice manual download site
 UXfservice manual download site
No grating fault can be made of brightness channel, tube power supply circuit and kinescope UXfservice manual download site
(1) the first IC501 15 feet of a short circuit, observed have matte screen tent. 15 feet grounding is equivalent to three depending on the tube at the end of the emitter, the collector tube cathode potential, to fall to is very low. If see, at the end of the tube and the power supply is normal, when short circuit should be screen grating. If a grating. Specify the brightness of the channel before IC501 15 feet. Otherwise the fault at the end of the visual and tube power supply circuit. UXfservice manual download site
The machine will IC501 15 feet of short circuit, no grating. UXfservice manual download site
(2) the measuring tube accelerating voltage 330 v, normal. Filament voltage measurement for OV. Explain kinescope filament voltage caused by light recorded fault. UXfservice manual download site
(3) measuring line output transformer T771 5 feet of ac voltage is 6 v, note 5 feet to ask with open-circuit fault of tube feet. Carefully check, T771 5 foot printing plate, open again after welding good troubleshooting.UXfservice manual download site