The "TRS-80 Model 4 Technical Reference Manual" RS Part #26-2110 was scanned and converted to a text based Word 97 document using OCR software. All of Part 1 / Hardware was scanned except for:

• Section V Mini-Disk Drive
• Section VI Power Supplies
• Section VII Video monitor

All the graphic schematics, figures and tables were preserved and the document has been formatted identical to the original manual, except:

• Circuit Trace and some Component Layout diagrams were not scanned.
• Page numbering is different due to the missing diagrams & sections and due to some page re-formatting.

The .PDF format file is available for download.

Model 4 Technical Manual (1,886k)

The schematics are available in 600dpi .GIF format on the TRS-80 Collection CD.