Dear all, we are trying to get an ASR43 paper tape unit back to running condition. The front panel punch advance button now works, punching sprocket holes. This seems to have been a problem with the connector to the circuit board, and switching the pulley from 60Hz to 50Hz. I now really need access to schematics for the circuitry to try to work out the problems with the reader, which will not advance. A scan or purchase would be acceptable. Best Wishes, Ronan Scaife, DCU, Dublin, Ireland --