When observation and repeated shut down for a rest in the above phenomenon. JM3service manual download site
 JM3service manual download site
This is the line scan out-of-step phenomenon. On normal, out-of-step components poor thermal stability. The cause of this failure; JM3service manual download site
 JM3service manual download site
(1) line oscillator attune slants, slightly after the temperature drift is beyond the scope to keep. JM3service manual download site
 JM3service manual download site
 JM3service manual download site
(2) the line oscillator stability, temperature rise after the frequency drift is too large. JM3service manual download site
(3) an AFC Lei detectors, bad filter characteristic and keep synchronization range reduced. JM3service manual download site
 JM3service manual download site
(repair method) JM3service manual download site
(1) adjust line frequency potentiometer R703 after boot, check whether its in the best position, it is normal. Has a very wide range of synchronous keep around, that is not horizontal frequency partial tone, nor is it an AFC keep the scope small. JM3service manual download site
 JM3service manual download site
(2) after being out of step adjustable R703 again, still image synchronization, there is still a good synchronous adjusting range. But restart after shutdown cooling, horizontal frequency and need to readjust to sync. Specify is horizontal frequency drift after temperature rise is too large, need to check the line oscillator oscillation and timing components. JM3service manual download site
(3) check the absorber swings IC701 C70I peripheral components, C70Z, R703, consider replacing IC701.JM3service manual download site