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555: Difference between revisions
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Architecturally, the 555, with its four plug-ins, is similar | Architecturally, the 555, with its four plug-ins, is similar | ||
to the [[7844]]. | to the [[7844]]. | ||
== CRT Circuit == | |||
The CRT circuit in the 555 has two high voltage transformers. | |||
One transformer, T901, generates: | |||
* CRT anode voltage | |||
* lower beam CRT cathode voltage | |||
* lower beam CRT control grid (blanking) voltage | |||
The other transformer, T801, generates: | |||
* upper beam CRT cathode voltage | |||
* upper beam CRT control grid (blanking) voltage | |||
==Pictures== | ==Pictures== | ||