I recently acquired 4 Tek 7000 series scopes (with plugins), a pair of 7603s and a pair of 7613s. The idea is to repair/restore these in my spare time, so updates might be slow.
Starting with a 7603 and the first unit I check is 100% dead. Others who have repaired these have replaced the main filter caps in these scopes. I figured that is a good place to start before checking the regulator board.
Rather than replace the original Mallory electros with NOS ones I elected to use modern equivalents. Most (if not all) modern electros are snap-in PCB mounting using 10mm spaced leads. The original caps had 4 leads around the perimeter with a 5th leg in the middle. Over lunch one day I came up with a neat answer to this square peg/round hole dilemma.
The original cap is on the right, replacement with adapter on the left. PCB was made by iTead (US$1 per board) and the mounting pins are from Harwin (p/n H2101-01).
Completed replacement of all 6 caps. I am still waiting on the delivery of a smaller adapter board for the 1 electro with a different footprint.
The PCB pins were selected to space the adapter board away from the main PCB as seen here.
Finally, the original caps were used to link PCB tracks together (to allow other tracks to pass underneath the cap). I have seen other repairs where wire links had to be installed along with bodging in the replacement cap. This adapter board neatly solves that problem too.
To be continued...