Controller IC for Revox B77 and PR99
MAIN micro controller PROM IC for all Revox B77 and PR99
Our Part No. 1.177.317-51
Fits most models B77 and PR99 .
Some early models (very few) use the large Studer PROM IC - see the controller IC for the A700. The parts are not interchangeable.
Non OEM. The part is burned by us on a brand new IC chip and is fully warranted. It includes a new plug-in IC socket as some some boards don't have these and the chip is soldered in - we think it's better to have it as a plug-in IC.
This IC often becomes faulty as a result of capacitor degradation with age. A recap of PSU motors and tape transport modules should be done before replacing this IC. One of our electronic kits is highly recommended.