Repair Tips and Reference Material

Here are some links to repair tips and reference material.

The 4051 had three firmware releases during its production. This July 7, 1976 document details the corrections and the serial number breaks for the various releases.
4051 Firmware Releases

Giovanni Gianni Becattini has created a very nice 7603 repair book. You can see his other free books at www.k100.biz/parade.htm External Site
7603 Power Supply Repair External Site

7854 Mostek MKB36000 ROM Repairs

Circuit Computer

Circuit Descriptions with Chuck Miller

CRT Database

Dallas DS1287 Dead Battery Repair

We don't know the source or reason for this document which describes the more popular transistors used at Tektronix.
Everything About Transistors

Fundamental Electronic Concepts for Oscilloscope Use and Maintenance 1956

Keytronic Capactive Keyboard Repair

Military Nomenclature / Modified Products

This undated document describes the phase-in of earthtone colors instead of the traditional Tek blue.
New Color Scheme

Primer of Waveforms and their Oscilloscope Display 1960

Repairing Plastic Knobs and Gears