Revox A77 Quick Reference Manual
Hide thumbs
Also See for A77:
- Service manual (134 pages) ,
- Operating instructions manual (56 pages) ,
- Operating lnstructions (31 pages)
Advertisement
Quick Links
Quick Reference Guide to Revox A77:
Page:
2
About Revox A77 and info on Mark versions I to IV
3
Necessary repairs & points of attention
4
Location of the boards / Power Supply PCB voltages
5
layout Power Supply Board
6
layout Tape Drive / Transport Control Board
7
layout Capstan Speed Control Board
8
layout Switch Board / VU Meter Board
9
Back side connections / Front panel knobs layout /
Calibration pots location
10
Calibration instruction – the short & quick version
11
Caps and component replace list [not done yet]
QRG Revox A77 |
www.reeltoreel.nl
| Philip van der Matten | ver 3.1 | 27 feb 2025 | page 1/11
Advertisement
Related Manuals for Revox A77
Summary of Contents for Revox A77
- Page 1 Quick Reference Guide to Revox A77: Page: About Revox A77 and info on Mark versions I to IV Necessary repairs & points of attention Location of the boards / Power Supply PCB voltages layout Power Supply Board layout Tape Drive / Transport Control Board...
- Page 2 But, the original SM is still required for reference and for specific problems, of course. As there a 4 versions of the A77, Mark I to Mark IV, there may be differences in your deck. This QRG focusses on ●...
- Page 3 There are also points of attention: The A77 won’t latch if the remote plug on the top isn’t installed ❏ The A77 won’t turn on if the 2 plugs in the back near the powerplug aren’t fitted. ❏ But be careful! They carry mains voltage.
- Page 4 Revox A77 – Location of the boards: Power Supply Board Capstan Speed Control Board Tape Drive/Transport Control Board Switch Board seen from back Power supply PCB voltages 27 V 27 V top: 27 V 27 V D102 – D101 21 V...
- Page 5 / 40 V □ Replace trimpot 2,5 kΩ □ Don’t forget the thin black wire at the back of the pcb! QRG Revox A77 | www.reeltoreel.nl | Philip van der Matten | ver 3.1 | 27 feb 2025 | page 5/11...
- Page 6 Fast Forward (+ Playback for ½ second) 470/40 sparkkillers 0,47 µF □ Replace 3 sparkkillers 470nF/>300V □ Replace C111 470µF/40V QRG Revox A77 | www.reeltoreel.nl | Philip van der Matten | ver 3.1 | 27 feb 2025 | page 6/11...
- Page 7 / 40 V (2X) 220 µF / 6 V 220 µF / 25 V ax. □ Replace trimpot P201 2,5 kΩ QRG Revox A77 | www.reeltoreel.nl | Philip van der Matten | ver 3.1 | 27 feb 2025 | page 7/11...
- Page 8 Switch Board layout VU-Meter Board layout BIAS Trap test point probe point step 8 C515 QRG Revox A77 | www.reeltoreel.nl | Philip van der Matten | ver 3.1 | 27 feb 2025 | page 8/11...
- Page 9 STEREO MONO MIC HI 1 → 2 MIC HI 2 → 1 VOLUME BALANCE PHONES LEVEL LEVEL Calibration pots location QRG Revox A77 | www.reeltoreel.nl | Philip van der Matten | ver 3.1 | 27 feb 2025 | page 9/11...
- Page 10 Revox A77 – Quick Overview Of Electrical Adjustments / Alignment / Calibration Only IF you’re familiar with the procedure (if not, I suggest you do it from Service Manual 1 time). [stereo+max, NAB, aux+min, 2xrec] defines the knobs and buttons from left to right before each step.
- Page 11 Caps and component replace list To be completed QRG Revox A77 | www.reeltoreel.nl | Philip van der Matten | ver 3.1 | 27 feb 2025 | page 11/11...
Need help?
Do you have a question about the A77 and is the answer not in the manual?
Questions and answers