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ALD schematic diagrams for CHM 1401s

Clicking on a link will cause a download to your computer.
The sizes are included to show the volume of the download - sometimes VERY LARGE !!!!

These documents were scanned by Carl Claunch and Marc Verdiell at very high resolution to help assure that all the little pin numbers are very clearly identifiable. They were placed into two numbered folders/directories. One of the numbers matched the CT 1401, the other number did not match the DE 1401 - but seemed intended for that machine? This question is being worked out. An alternate source of these ALD documents is Carl Claunch's dropbox. Quoting Carl "here are the scans of the 1401 documents we performed at the Shustek Center."

25478-CT - The directory was named 25478, the serial number of the CT 1401.

1401-1406 Core Storage.pdf	1.4 MB
1402 Reader Punch Service Index.pdf	9.3 MB
25478 31-32.pdf	402.7 MB
25478 34-36.pdf	564.1 MB
25478 37-42.pdf	375.2 MB
25478 44-46.pdf	255.5 MB
25478 56-77.pdf	190.8 MB
25478 ILD.pdf	1.01 MB
25478 install instructions.pdf	25.8 MB
25478 plug charts and index.pdf	87.2 MB
25478 power supplies.pdf	97.8 MB
25478 TAU ILD.pdf	953.4 MB

28421-DE - We hope - the directory was labeled as 26721 by the people that did the scanning.

729-II Tape Drive (SN 06810).pdf	247.7 MB
1401 (SN 26721) 1401-40-28421_2073_866_TAU.pdf	394 MB
1401 (SN 26721) Installation Procedure & 1401 Bill of Materials.pdf	174.2 MB
1401 (SN 26721) SMS Cards 229-2038-1 Supplement S29-0002-0 dated 9-1-65.pdf	431.5 MB
26721 34-36.pdf	677.5 MB
26721 37-77.pdf	1,900 MB
26721 alphaIndex,connectors,plugCharts.pdf	386.7 MB
26721 EC,PlugList,31-32,38.pdf	903.4 MB
26721 ILD.pdf	955.7 MB
26721 index,71-74,tau.pdf	496.5 MB

Updated through March 5, 2023