TTI TSX1820P repair log.

[djsb]

Just bought one of these to be repaired. It's not arrived yet as only bought today. Seller reports "Sometimes it turns on. Sometimes it doesn’t show up any output". I will record my progress here.

[Spoony]

Hi i am currently the service engineer working for TTI any help i can offer just let me know!

[djsb]

So, its arrived.
At first turn on the front panel lights up very briefly. Then nothing. There was the sound of a decaying whine from inside the power supply. I tried this for 4 more times and then the supply powered up completely. I have since tried to get the supply to NOT work, but it just keeps turning on. I haven't checked if it works under load yet though.
There appears to be either an intermittent or a developing problem somewhere. Maybe it's in the soft start section.
Anyway I'm going to open the case and give it a good vacuuming and then clean/reseat as many connectors as I can. And then have a look for any bulging capacitors or other signs of distress. Will post more later.