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Repairing 7000-series plug-in sockets: Difference between revisions
Repairing 7000-series plug-in sockets (view source)
Revision as of 03:17, 15 November 2021
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==Replacing the connectors with modern equivalents== | ==Replacing the connectors with modern equivalents== | ||
While the original connectors are custom parts and no direct modern replacement is known to be available, it is possible to remove the old connector and replace it with a standard 76-pin, 0.1" pitch card-edge connector. | While the original connectors are custom parts and no direct modern replacement is known to be available, | ||
it is possible to remove the old connector and replace it with a standard 76-pin, 0.1" pitch card-edge connector. | |||
(NB: This procedure has not yet been tested with 79xx high-speed instruments, and will quite likely cause unacceptable reflections in a [[7104]], which uses special controlled-impedance sockets.) | (NB: This procedure has not yet been tested with 79xx high-speed instruments, and will quite likely cause unacceptable reflections in a [[7104]], which uses special controlled-impedance sockets.) | ||
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</gallery> | </gallery> | ||
The old connector can be cut apart to insert a modern card-edge connector between the side standoffs. Leave a shoulder that can take the pressure of the plug-in being inserted | The old connector can be cut apart to insert a modern card-edge connector between the side standoffs. | ||
Leave a shoulder that can take the pressure of the plug-in being inserted. | |||
Ensure the bottom of the modern connector's card slot is at the correct distance to the old connector's top plane - in other words, don't mount the new connector flush with the old connector's top, or the plug-in will likely not insert all the way. In the example shown, the new connector needed to be recessed by about 2.5 mm. | |||
<gallery> | <gallery> | ||
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It might be possible to use a connector with wrap pins if available, however, bending and inserting the pins could be a challenge. | It might be possible to use a connector with wrap pins if available, however, bending and inserting the pins could be a challenge. | ||
The example shows a connector with solder lugs, extended by short wires. This will fit easily but takes quite some time to make the 76 connections. | The example shows a connector with solder lugs, extended by short wires. This will fit easily but takes quite some time to make the 76 connections. | ||