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Re: Tektronix 7104 - RIFA explosion and replacement


 

Bruce,

If you want .047mfd:
If you want .068mfd:

The value is not critical. The latter is common in the 2000 series as mains filters. What I sent is X1 type that is higher voltage rating than X2. You can use a resistor where the original was which is in series with the filter.

Getting to the underside of the bottom board is not that difficult. There are four small phillips screws that hold the bracket for the two main screw cans. Two are on the rectifier/regulator board and four are on the side panel with the vent holes. Remove the two filter cans making sure to get polarity right when reinstalling. You can put in an additional NTC off the mains while you are in the cavity. A CL-70 is an option.

If you have not already done so, clean out the odor and any deposits left by the exploding condenser.

Mark

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