A320 GT40 Display Generator

This document is an Engineering Change Order (ECO) log from February to September 1973, detailing modifications and corrections for the A320 GT40 Display Generator. The key changes recorded include:

• A320-B0001 (Feb-73): Addressed miscellaneous cut-etch and add-wire changes, requiring rework on Limited Release models and module exchanges for earlier versions, with specific prerequisite FCOs listed.
• A320-00002 (Feb-73) and A320-0002A (May-73): Updated IC numbers due to a new module layout, necessitating new "D" revision Circuit Schematics, while maintaining "C" revision for "B" boards. The supplement corrected Sheet 6 of the schematic and added jumpers to the Parts List.
• A320-C0003 (May-73): Corrected vector length errors by adding a 47-ohm resistor and a 0.01 ufd capacitor, and specified replacing Kep Nuts with hex nuts and lock washers for transistors Q20 and Q42.
• A320-C0005 (Sep-73): Resolved issues with vector length range adjustment, involving changing Zener diode D27 to a 1N754A, correcting the drawing of transistor Q41, adding "A6000 or A6000YA" to the Parts List, and other documentation updates, resulting in CS revisions "C2" and "F".
• A320-00004 (Aug-73): Rectified etch errors found on "D" revision production modules by updating the digitized data base artwork to revision "E" and requiring rework of existing "D" modules.

Each entry specifies the nature of the problem, the required correction, and often includes notes on effectivity (in-plant or field), estimated installation/test time, and kit contents.