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flyback hook pin connector just fell out when reinstalling to tube

lowlytech

Well-known member
Just got the power supply and analog board completely recapped and was reassembling it when the darnest thing happend.  I was putting the flyback plug back on the CRT and the little teeth or hooks that connect under the suction cup just fell out on the bench.  There was a very small bit of wire present still in the cup, so I tried to dab some solder in there and reconnect, but now because of the tight space I have managed to blacken the area inside the rubber ring and can't really tell if I have indeed soldered the main cable back.

I tried to ohm out the clamp to any of the pins on the transformer, but I get no beeps on the meter.   I would just see if it turned on, but I still have my logic board without half of its caps and a few other items completely un-soldered from it.  

I went ahead and turned on the mac to see if I would see a raster or some sign that the CRT was indeed powered on, but it was completely dark even when fiddling with the brightness control.  The neck of the tube did have the orange glow but I thought I would ask on a hunch if you powered on a compact mac with its logic board removed, what behavior does the CRT have?

Thanks and hope I didn't just break my flyback, as I don't know how to strip more wire, as it looks to be completely molded to the suction cup.

 

lowlytech

Well-known member
Well I managed to get a complete analog board off ebay for a flyback replacement.  I noticed on this analog board I got today that the wire in the cap is wrapped around a screw.  The original flyback was just a wire soldered to the clips.   I would just cut and splice the wire on the original one, but the molded cap plus the fact that it is 25k+ volts scares me to say the least.

 

lowlytech

Well-known member
Got the logic board recapped and reinstalled and apparently the resoldering of the flyback clip was successful.  I have a display.  The CRT acted completely dead without a raster or even light light up without the logicboard connected.   This is probably basic mac knowledge, but I didn't know this.  Slowly learning the ways of the vintage mac. 

 

Iesca

Well-known member
Congrats! Scary when something breaks unexpectedly, but a great relief if you were able to fix it again.

 
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