The fault isolation diodes as field blanking D603 breakdown caused by. Field blanking via D603 add to the positive, D302 row blanking. Add to D305 D302 positive, add to three depending on the base. 2Qtservice manual download site
 2Qtservice manual download site
Disappear when D603 breakdown, isolation effect, admission line blanking string scanning circuit, the formation of blanking and games are part of the initial disturbance, field is cheng sawtooth voltage at the same time also affect the intensity modulation. D, make the upper screen appears black patches, make color instability. 2Qtservice manual download site
When D603 normal the anode voltage of 12 V, the cathode voltage of + 2.4 V, because its are cut-off, flyback conduction, so show for reverse bias voltage. Ends after the breakdown voltage is the same, which can help the judgment. After replacing D603, 1 s2076 fault elimination.2Qtservice manual download site