hey all yet another problem i cant seem to get to the bottom of. has anyone ever come across a low hv problem and tried to trouble shoot it by removing the 6bk4 cap, or the crt plug, or the focus tube, and come up with the same hv,10kv bright up, turn down to get clear pic and the hv is 15kv.all tubes are good and tested, replaced all electrolytics.checked cathode current and its alittle confusing because this set has 2 hot in paralle and had to break the 2 cathodes to check but the sams shows for each one is to be 105ma but this is coming up at 220ma either together or separate both 220ma and cannot get it to adjust, it will go up alittle but wont go below 220ma and also sams states to put a meter across r155 and adjust eff coil to get 1.2 volts dc but i get nothing across that resistor. of course sams states turn bright down to min, and set hv to 24kv befor doing any of this but i cant get the hv and at a loss for what is going on now, i thought the fly may be going but just dont know. this is the set from grimer, the 66 motorola 23 inch color, its odd.
10-02-2011, 03:13 PM
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