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Repairing a 1960s mainframe: Fixing the IBM 1401’s core memory and power supply

Posted on Thursday, December 28th, 2017 in repair, vintage by DP

ibm-1401

Ken Shirriff wrote a great article describing the repair process of  the vintage IBM 1401 mainframe computer:

The problem started when the machine was powered up at the same time someone shut down the main power, apparently causing some sort of destructive power transient. The computer’s core memory completely stopped working, making the computer unusable. To fix this we had to delve into the depths of the computer’s core memory circuitry and the power supplies.

See the full post on his blog.

This entry was posted on Thursday, December 28th, 2017 at 11:45 pm and is filed under repair, vintage. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

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