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Old 07-04-2015, 06:20 PM
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dtvmcdonald dtvmcdonald is offline
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Join Date: Nov 2012
Posts: 1,268
Today I recapped the TV power supply. Since I am not restuffing electrolytics,
just papers, this was easy. It worked correctly with no load.

But I noticed something odd in the CRT resistor chain: The lowest resistor
in the chain is shown on all schematics as 330K. Mine is 560K.
The schematic shows the CRT "screen" connected at the top of
of the 330K resistor, giving 250V. My power supply has
it attached 470K above the 560K resistor, or 1030K above ground.
All other resistors are as specified. This makes the voltage about 780,
which is what I measure. This is not original. Despite being
in crates, my chassis have clearly been well used an the PS has been
worked on a bit. The original connection was clearly just cut off.

What was going on?

Last edited by dtvmcdonald; 07-04-2015 at 06:26 PM.
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