Dragon Data internal repair document that covers a number items, including:
* Failure points and components to target
* Main board types
* Mixing differnt power supply board versions with different mainboards
* Modifications for mixing boards

The documents are provided as is, it's also quite likely there are pages out of order and possibly missing.

Download (part 1 remastered) Service Guide (35K PDF)

Download the complete (original scans) service info (12MB PDF)

First Page
First page of the repair doc

 

Board Identification
Board Identification diagrams (Page 14)

Download (part 1 remastered) Service Guide (35K PDF)

Download the complete (original scans) service info (12MB PDF)

Archive's own copy shown.

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"What would I do with a GEC Dragon 64?"