These handy Quick Reference Guides are PDF's that I made myself but are based on the original Service Manuals.
They typically contain diagrams, handy circuit board layouts that I made, instructions, partlists and other information not found in the Service Manual.
The QRG's are is useful when servicing the reel-to-reel tape deck in question.
These QRG's are to be used alongside the Service Manual.
As these QRG's are constantly updated with new information and errata, be sure to download the latest version each time you need them.
The Guides:
Studer A810, contains cards layout, gauges, calibration instructions and table
Studer A807, contains mechanical tension adjustment, critical caps locations, wiring diagram volume potentiometer and jog shuttle
Fostex R8, contains layout of the audio cards, recap info, and complete calibration instructions
Philips N4520, contains audio undertray layout with calibration instructions, and replacement items lists
QRG on how to make your recordings on DCC perfect
Document with templates to create your own DCC inlay j-card
QRG How to calibrate tape decks based on MRL documentation
QRG Hoe tapedecks af te regelen, gebaseerd op MRL dokumenten NL-versie
Sony TC-755, stuck pinch roller problem and calibration pots layout
8-track label dimensions, an overview of the labels on a 8-track shell