Here are some links to repair tips and reference material.

vintageTEK Museum Product Repair

150-0009-00 Neon Lamp Burn-In

1950 Tektronix Color Codes

468 Mostek MKB36000 ROM Repairs

7854 Mostek MKB36000 ROM Repairs

Circuit Descriptions with Chuck Miller

CRT Database

Dallas DS1287 Dead Battery Repair

Fundamental Electronic Concepts for Oscilloscope Use and Maintenance 1956

Keytronic Capactive Keyboard Repair

Primer of Waveforms and their Oscilloscope Display 1960

Repairing Plastic Knobs and Gears

Tektronix Modification Numbering System 1968

Tektronix Standards: Abbreviations To Terms 1967

Tektronix Standards: Glossary of Technical Terms - Electronics 1967

Tektronix Standards: Terms to Abbreviations 1967

Tektronix Vacuum Tubes

Troubleshooting Your Oscilloscope

Using the Oscilloscope as an Instrumentation Maintenance Aid 1958

vintageTEK Repair Videos

• 7L12 Spectrum Analyzer Plug-in
• Casting a Replacement Knob