Pigbenis27
Member
- Joined
- Sep 26, 2017
- Messages
- 16
Hey there Everybody!!
So I've been working on the Power Supply Unit for an SSL 4056 G series Console. The PSU has gone done recently and the forums on this site have provided me with an incredible amount of help in fixing the PSU. I've gathered a list of possible problems within the PSU and how to identify/fix the parts that are broken or worn down. I've identified that is the +/-20 power rails on both console supply units that has gone out and it indeed resulted from blown transistors. I have replaced all 24 transistors between all 4 power rails in both PSU (6 transistors per 4 total rails) and I am currently in the process of testing the Bridge rectifiers to make sure they are solid as well. However; one piece of information that I am missing and cannot seem to find regards an electrical part other have called the Crowbar SCR unit. I have read about crowbar units and i now understand what it is they do but i have yet to find any info on identifying these parts or how to test them. I have a snaking suspicion that this is in fact just another name for the Bridge Rectifier although i'm not sure and the term has come up in enough forums that it seems important enough to warrant further investigation. If anyone can either validate my assumptions or set me on the correct path and possibly even give a detailed description of the unit and the protocol for testing it I would be greatly appreciative! Thank you guys so much in advance for your help!!!
Tony
So I've been working on the Power Supply Unit for an SSL 4056 G series Console. The PSU has gone done recently and the forums on this site have provided me with an incredible amount of help in fixing the PSU. I've gathered a list of possible problems within the PSU and how to identify/fix the parts that are broken or worn down. I've identified that is the +/-20 power rails on both console supply units that has gone out and it indeed resulted from blown transistors. I have replaced all 24 transistors between all 4 power rails in both PSU (6 transistors per 4 total rails) and I am currently in the process of testing the Bridge rectifiers to make sure they are solid as well. However; one piece of information that I am missing and cannot seem to find regards an electrical part other have called the Crowbar SCR unit. I have read about crowbar units and i now understand what it is they do but i have yet to find any info on identifying these parts or how to test them. I have a snaking suspicion that this is in fact just another name for the Bridge Rectifier although i'm not sure and the term has come up in enough forums that it seems important enough to warrant further investigation. If anyone can either validate my assumptions or set me on the correct path and possibly even give a detailed description of the unit and the protocol for testing it I would be greatly appreciative! Thank you guys so much in advance for your help!!!
Tony