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#11
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Hey guys so I've been trying to selectively recap this set, to try and learn, the symptoms of failures in each of the sections. Right now I fully recapped PC 103. However I still can't pass a signal to the picture tube. Also I've lost a little bit of vertical deflection since the recap.
In addition to recapping PC-103 I have replaced C63, C64, I've replaced all three sections of C1, c116, c117, and c118. Out of all these caps only C62,C63, C65,c116, and 1 section of C1,were bad. The rest tested good surprisingly but I didn't want to have to unsolder the boards again if I didn't have to. I'm going to recap the vertical board today, to hopefully fix the issue with the vertical deflection. What's sad is before I recapped board pc103 and replaced the filter caps I actually had full deflection but couldnt pass an image through the TV. I don't know if maybe it's just coincidental and capacitors are failing on the vertical board. I also tested coil number 50 and it tests at 7.5 ohms. I tried putting a signal in on the 6aq5 on pin number one and couldn't get an image on the screen, then I tried pulling V6 the third video If and putting a signal in on pin number seven and still couldn't pass a signal. My Heath kit signal generator only puts out about 1.5 volts in the video setting is it just not enough to pass through? I also tried putting the lead from the heath kit directly to pin number two of the picture tube and that didn't do anything either. I'm not sure what to make of all this, it seems to me if I could pass a signal over pin 1 of the video output it should display on the screen. I tried removing V6 to try and keep the IF from sending a signal in and over powering my signal. What am I missing? |
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