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Vertical sycn is pulled from the 9-48 Module, off pin 3 of the 221-45 chip. Can you scope the sync there?
If I can find my Zenith Tech Topics binder (MIA right now..) there is an entire TT issue dealing with the 25DC56 and common problems. I remember scanning it, so I'll check my Canon scanner folder too...
__________________
Brian
USN RET (Avionics / Cal)
CET- Consumer Repair and Avionics ('88)
"Capacitor Cosmetologist since '79"
When fuses go to work, they quit!
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