I love analog devices and have collected a couple over the years. Since all of them need service sometimes, I also have a collection of analog manuals. Some of them were pretty hard to find, so I though it would be cool to provide links for them here for those who need them.
Drawmer DL-221 User Manual
Hello Simon, I thought I should tell you. In your Furman RV-1 docs, the BOM you have is not for the schematic you have. That BOM is for the RV-1/2 circuit board 302008-73-1. The schematic and manual you have is for the RV-1 circuit board 302006-73, an earlier revision. They are 2 completely different circuit boards so the parts designations are completely different. Also the resistor values for the balanced input on the schematic are wrong. They should be R43+R44 = R45+R46 = 10kΩ so R43+R44+R45+R46 = 20kΩ as specified in the manual. (I'm going to try 4.7kΩ for all 4 resistors). I discovered this just now while upgrading my early RV-1 to have balanced input and output. Many thanks for the manual. Hard to find! Dan Australia
REEL RECORDER ALIGNMENT
Tape Recorder Alignment Instructions
Roland SH-2 Service Manual
TASCAM 644 MIDISTUDIO
Tascam 644 Midistudio Manual