PhilipA
Experienced Member
All,
These terminals have been like buses. Wait forever, then two come along at once.
I now own two non-functional Wyse WY-60 terminals. One is literally all burned up around the flyback. Looks like either it took a lightning strike, surge, or the insulation on the flyback let go and it shorted itself out. Either way, that board is "toasted" beyond repair, as the fiberglass is even all burned up. The power supply makes an unhappy switch-mode whine when powered up (it's burned, figured I might as well try).
The other one doesn't do very much of anything at all. I've managed to find the service manual for it, which is good as it has the schematic (which is horrible to read) but doesn't include much in the way of real troubleshooting data (what voltages should be present where, for instance).
The three test points (+5, +12, -12) are all dead. There's some kinda low resistances on the board around the power rails so I spent a bit of time last night pulling the electrolytics off the board one by one to see if I could find what's causing the short, to no avail.
I might just "shotgun" the board with new electrolytics anyway. These terminals lived their life switched on, displaying nothing at work. The phosphor on the screen shows no sign of burn. Figuring once I've got power back, HT should be the next step, then maybe signs of life from the electronics.
Anyone got one of these? It's like the Honda Civic of terminals. Nicely designed to be worked on inside, also.
--Phil
--Phil
These terminals have been like buses. Wait forever, then two come along at once.
I now own two non-functional Wyse WY-60 terminals. One is literally all burned up around the flyback. Looks like either it took a lightning strike, surge, or the insulation on the flyback let go and it shorted itself out. Either way, that board is "toasted" beyond repair, as the fiberglass is even all burned up. The power supply makes an unhappy switch-mode whine when powered up (it's burned, figured I might as well try).
The other one doesn't do very much of anything at all. I've managed to find the service manual for it, which is good as it has the schematic (which is horrible to read) but doesn't include much in the way of real troubleshooting data (what voltages should be present where, for instance).
The three test points (+5, +12, -12) are all dead. There's some kinda low resistances on the board around the power rails so I spent a bit of time last night pulling the electrolytics off the board one by one to see if I could find what's causing the short, to no avail.
I might just "shotgun" the board with new electrolytics anyway. These terminals lived their life switched on, displaying nothing at work. The phosphor on the screen shows no sign of burn. Figuring once I've got power back, HT should be the next step, then maybe signs of life from the electronics.
Anyone got one of these? It's like the Honda Civic of terminals. Nicely designed to be worked on inside, also.
--Phil
--Phil
