NCR model 3401 class 5451

From: Chuck McManis <>
Date: Thu Jun 22 13:03:11 2000

At 06:32 PM 6/22/00 +0100, Tony wrote:
>I've never seen a PDP11 or PDP8 with a power supply margin test (although
>IIRC, adjusting the PSU regulators to be slightly higher or lower than
>+5V _is_ mentioned in some of the service manuals as a way to trace

The PDP-5 has a big knob in the back to turn the power supply up or down
and a whole procedure for finding weak transistors in the maintenance manual.

Received on Thu Jun 22 2000 - 13:03:11 BST

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