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Re: Tek 2465 power supply cycling


 

Peter,

R1020 is known to go bad. That should be 2W. Make sure to get a resistor that is about 15mm long. Some 2W resistors are 3.68 x 8.72mm which is smaller than a 1/2W. C1034 is originally a tantalum. I replaced the three on that board with 50V film types to ensure low ESR. C1055 and a few others are the clear amber tinted RIFAs that are known troublemakers. I used 630V film types to replace them. C1051 is another condenser that is a RIFA type. Look to see if those were replaced. CR1110 is known to go bad. It is a Schottky rectifier. I replaced mine with a Si type and it worked with the proper voltage out. Mine is 200V, I think, because I have some in stock. If you decide to replace the doubler condensers, I suggest using Nichicon LGR types. I put in 390mfd in mine. Make sure the diameter is small enough to fit where the originals are. Add wires from the lugs/pins of the LGR type to the board.

Mark

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