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Old 28th Jun 2021, 8:37 pm   #395
FERNSEH
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Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
Default Re: Baird T5 restoration project.

The T23 timebase is working properly again.
Most likely suspect component was the 47uF coupling capacitor between the line transformer secondary and scanning coils. It's function is important because changes the negative going sawtooth waveform to AC, that is, symmetrical about zero. Without that component the line scanning would be one sided.
The other suspect component was the 0.25mfd line TB timing capacitor. It's OK.
Now that both timebase units are working it's time to turn my attention to the power supply units in the T5 and T23.

DFWB.
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