Grating in dark area, the cause of the problem, it is a bad picture tube, the second is bad deflection coil. Tube produced adverse transient area is fixed, and the dark space generated by the deflection coil bad will move according to the deflection coil rotation. 9zEservice manual download site
 9zEservice manual download site
 9zEservice manual download site
(1) of landmines screw deflection chart, and turn the deflection coil, found a dark space to follow a moving, specify on the deflection coil. 9zEservice manual download site
 9zEservice manual download site
(2) measuring deflection coil resistance, line deflection is 1.8 Ω, field deflection is 60 Ω, essentially normal. 9zEservice manual download site
(3) use substitution method, after changing the deflection coil fault elimination.9zEservice manual download site