12-07-2015, 12:01 PM
Update to the refurbishment.
Unit had developed an intermittent tape drive operation, sometimes it would work, other times not. Prodding the main cable bundle on the PCB deck would sometime trigger operation but not always. Fault was traced to, get this, an unsoldered joint. Wire from a leaf switch had been bent in an L shape and inserted through a PCB riser. There are four of these risers, three were soldered correctly, the fourth had not a splash of solder on it. Drive must have been faulty from new, how it got through quality control I do not know, but this one solder joint could have condemned a perfectly good computer.
Only noticed because I have upgraded to reading specs when doing electronic works, who said getting old is a handicap?
Unit had developed an intermittent tape drive operation, sometimes it would work, other times not. Prodding the main cable bundle on the PCB deck would sometime trigger operation but not always. Fault was traced to, get this, an unsoldered joint. Wire from a leaf switch had been bent in an L shape and inserted through a PCB riser. There are four of these risers, three were soldered correctly, the fourth had not a splash of solder on it. Drive must have been faulty from new, how it got through quality control I do not know, but this one solder joint could have condemned a perfectly good computer.
Only noticed because I have upgraded to reading specs when doing electronic works, who said getting old is a handicap?
